Fire grate and burner

Abstract

The utility model belongs to the combustion technical field, specifically discloses a kind of fire and burner.The fire has the ejection channel and combustion chamber of intercommunication, the fire top has fire plate structure, the fire plate structure covers the upper port of the combustion chamber, the fire plate structure is opened with multiple flame hole along length direction with the combustion chamber intercommunication, the fire plate structure is formed with recess down concave, and the flame hole is arranged in the groove wall of recess;Air supplementing channel not intercommunication with the combustion chamber is arranged in the fire, the upper end of the air supplementing channel is through the groove wall of recess to form air supplementing port, and the lower end of the air supplementing channel is communicated with external environment.The utility model can improve air supplementing sufficiency by the setting of air supplementing channel, improve combustion stability by the setting of recess, and then improve fire combustion stability and combustion sufficiency.

Description

Technical Field

[0001] This utility model relates to the field of combustion technology, and in particular to a burner and a flame grid. Background Technology

[0002] The burner is the core component of gas water heaters, gas wall-hung boilers and other gas water heating equipment. Its combustion performance, such as complete combustion and stability, directly affects the performance of the gas water heating equipment.

[0003] The prior art provides a burner for a gas-fired water heater, comprising multiple burners arranged side by side. Each burner includes an inner shell and an outer shell fitted over the upper part of the inner shell. The inner shell has an ejector channel and a central gas chamber, while the outer shell has a side gas chamber. The central and side gas chambers are connected by gas through-holes penetrating their walls. A gas supply hole is provided on the side wall of the side gas chamber. During burner operation, the gap between two adjacent burners forms a secondary gas supply channel. Air flows from top to bottom through this secondary gas supply channel to the upper part of the burner, thus providing secondary air supply for the flame combustion at the upper part of the burner.

[0004] However, the small gap between the upper ends of two adjacent burners results in a limited air supply flow. At the same time, the small distance between two adjacent burners leads to incomplete combustion, which increases the amount of pollutants produced during combustion and affects the user experience. Furthermore, the limited width of a single burner restricts the area available for opening flame holes at the upper end of the burner, making it difficult to effectively increase the combustion heat load of the burner. Utility Model Content

[0005] One of the technical problems solved by this utility model is to provide a burner that can effectively solve the problem of incomplete combustion caused by insufficient secondary air supply in existing burners, as well as the problem that the combustion heat load is difficult to effectively increase due to the limitation of the burner width.

[0006] The second technical problem solved by this utility model is to provide a burner that can effectively solve the problem of incomplete combustion caused by insufficient secondary air in existing burners, and the problem that the combustion heat load is difficult to effectively increase due to the limitation of the width of the burner.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A fire bar has a communicating ejector channel and a combustion chamber. The top of the fire bar has a fire plate structure that covers the upper port of the combustion chamber. The fire plate structure has a plurality of flame holes communicating with the combustion chamber along its length. The fire plate structure is recessed downward to form a groove, and at least some of the flame holes are disposed on the groove wall.

[0009] The burner is provided with an air supply channel that is not connected to the combustion chamber. The upper end of the air supply channel penetrates the groove wall to form an air supply port, and the lower end of the air supply channel is connected to the external environment.

[0010] Compared with the prior art, the burner of this utility model has the following advantages: By setting an air supply channel inside the burner, and the upper end of the air supply channel penetrating the groove wall to form an air supply port, external air can enter the groove through the air supply channel to provide air supply for combustion at the flame hole. Since the lower end of the air supply channel is connected to the external environment, the space between the lower parts of two adjacent burners can be fully utilized for air supply, avoiding the situation where the air flow is small due to the small distance between the upper parts of two adjacent burners and the difficulty in effectively supplying air due to the impact of the gas flow. This increases the amount of air that can flow into the air supply channel, improving... The design enhances the gas supply effect, thereby improving combustion completeness. Simultaneously, because the gas supply port is located at the bottom of the groove, the groove wall prevents air from escaping as it flows out, improving the airflow concentration within the groove and enhancing the mixing of air and fuel gas, further improving the gas supply effect and combustion completeness. Furthermore, the groove design increases the available area for flame holes while maintaining the same burner width, thus increasing the total flame area of ​​a single burner and consequently improving the combustion heat load of that burner. Finally, the groove design reduces airflow interference between burners, promoting stable combustion.

[0011] In one embodiment, the fire bar has three combustion chambers arranged side by side and separated along the width direction, the three combustion chambers being a middle combustion chamber and two side combustion chambers located on opposite sides of the middle combustion chamber;

[0012] The fire plate structure includes an intermediate fire plate covering the top of the intermediate combustion chamber and two side fire plates covering the tops of the two side combustion chambers respectively. The intermediate fire plate and the two side fire plates surround to form the groove. The flame hole includes an intermediate flame hole opened in the intermediate fire plate and a side flame hole opened in the side fire plate. The air injection port is located at the joint between the intermediate fire plate and the side fire plate.

[0013] In one embodiment, each of the side flame plates extends obliquely upward in a direction away from the central flame plate.

[0014] In one embodiment, the angle between the side fire plate and the vertical direction is 30° to 60°;

[0015] And / or, the height of the side fire plate in the vertical direction is 5mm~12mm;

[0016] And / or, the side flame plate is provided with at least two rows of side flame holes spaced apart along the width direction, and each row of side flame holes includes a plurality of side flame holes spaced apart along the length direction of the flame plate.

[0017] In one embodiment, the side flame plate includes a vertical plate portion and a horizontal plate portion connected at an angle, the horizontal plate portion is connected to the upper end of the vertical plate portion and extends in a direction away from the intermediate flame plate, the intermediate flame plate and the two vertical plate portions together form the groove, and the side flame hole is provided on the vertical plate portion and / or the horizontal plate portion.

[0018] In one embodiment, the burner has an ejector channel that communicates with the intermediate combustion chamber, the intermediate combustion chamber communicates with the side combustion chambers on both sides, and the side combustion chambers have air inlets in their walls that communicate with the external environment and are separated from the intermediate combustion chamber.

[0019] Alternatively, the firebox has two ejector channels, namely a first ejector channel and a second ejector channel, the intermediate combustion chamber is connected to the first ejector channel, and both side combustion chambers are connected to the second ejector channel.

[0020] In one embodiment, the firebox includes an inner shell and two outer shells, the inner shell being sandwiched between the two outer shells, the inner shell having the intermediate combustion chamber and the ejector channel, the outer shells having the side combustion chambers, the upper end of the outer shells being higher than the upper end of the inner shells, and the upper end of the inner shells and the upper ends of the two outer shells forming the groove.

[0021] In one embodiment, two combustion chambers are arranged side by side, and the fire plate structure includes two side fire plates respectively covering the upper ends of the two combustion chambers. The two side fire plates surround the V-shaped groove. Each side fire plate is provided with a plurality of flame holes along the length direction of the fire plate, and the air injection port is located at the joint of the two side fire plates.

[0022] In one embodiment, the burner has an ejector channel and a mixing chamber located between the two combustion chambers, the ejector channel being in communication with the mixing chamber, the mixing chamber being in communication with the two combustion chambers, and the air supply channel being separated from the mixing chamber.

[0023] In one embodiment, the firebox includes an inner shell and two outer shells disposed opposite each other, the outer shells having the combustion chamber and the side fire plate, and the inner shell having the ejector channel and the mixing chamber;

[0024] The upper part of the inner shell is sandwiched between the lower parts of the two outer shells. The inner shell has a first through hole on each of its opposite sides, and the outer shell has a second through hole on the side facing the inner shell. The second through hole is connected to the first through hole on the corresponding side.

[0025] In one embodiment, the air replenishment channel includes an air replenishment chamber and an air intake channel that are connected vertically. The air intake channel is located between the inner shell and the outer shell. The upper end of the inner shell and the two outer shells are arranged to form the air replenishment chamber. The air replenishment port is connected to the air replenishment chamber.

[0026] And / or, the upper parts of the two outer shells are partially fitted together and partially enclosed to form an air outlet channel, the upper port of the air outlet channel forms the air inlet, and the lower part of the outer shell and the inner shell enclose to form an air inlet channel, the air inlet channel and the air outlet channel are connected to form the air replenishment channel.

[0027] In one embodiment, multiple air outlet channels and air inlet channels are provided at intervals along the length of the burner and are arranged correspondingly. The upper end of each air inlet channel is connected to the air replenishment chamber, and the lower end of each air outlet channel is connected to the air replenishment chamber.

[0028] In one embodiment, the outer shell has a cavity bottom plate forming the bottom of the combustion chamber, the cavity bottom plate extending downward at an angle away from the inner shell, so that the cavity bottom plate and the inner shell enclose an air injection space, and the lower end of the air intake passage communicates with the air injection space.

[0029] And / or, the outer casing has a bottom plate forming the bottom of the combustion chamber, and an air intake hole is provided on the bottom plate, the air intake hole being in communication with the external environment.

[0030] In one embodiment, each combustion chamber is provided with a plurality of flame hole groups, and the plurality of flame hole groups corresponding to each combustion chamber are spaced apart along the length direction of the fire bar, and each flame hole group includes a plurality of flame holes;

[0031] The air supply ports are arranged at intervals along the length of the fire bar, and the air supply ports are arranged between two adjacent fire hole groups along the length of the fire bar.

[0032] The second technical problem mentioned above is solved by the following technical solution:

[0033] A burner comprising a fire bar as described above.

[0034] Compared with the prior art, the burner of this utility model has the following advantages: by adopting the above-mentioned burner, the combustion stability, completeness and safety can be improved, and the user experience of the burner can be enhanced. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the fire rack provided in Embodiment 1 of this utility model;

[0036] Figure 2 for Figure 1 A magnified view of a section at point I;

[0037] Figure 3 This is a cross-sectional view of the fire rack provided in Embodiment 1 of this utility model.

[0038] Figure 4 This is a partial structural cross-sectional view of the fire rack provided in Embodiment 1 of this utility model from another cross-section.

[0039] Figure 5 This is a schematic diagram of the disassembled structure of the fire bar provided in Embodiment 1 of this utility model;

[0040] Figure 6 A cross-sectional view of the outer casing provided in Embodiment 1 of this utility model;

[0041] Figure 7 A schematic diagram of the structure of a fire pylon provided in another embodiment of this utility model;

[0042] Figure 8 A schematic diagram of the structure of the fire rack provided in another embodiment of this utility model;

[0043] Figure 9 This is a schematic diagram of the structure of a fire briquette provided in another embodiment of the present invention;

[0044] Figure 10 A schematic diagram of the structure of the fire duct provided for another embodiment of this utility model;

[0045] Figure 11 This is a cross-sectional view of the fire rack provided in Embodiment 2 of this utility model;

[0046] Figure 12 for Figure 11 A magnified view of a section at point J;

[0047] Figure 13 This is a structural cross-sectional view of the outer shell provided in Embodiment 2 of this utility model;

[0048] Figure 14 This is a schematic diagram of the structure of the fire rack provided in Embodiment 3 of this utility model;

[0049] Figure 15This is a cross-sectional view of the fire rack provided in Embodiment 3 of this utility model.

[0050] Figure 16 This is a cross-sectional view of the fire rack provided in Embodiment 3 of this utility model from another section.

[0051] Figure 17 This is a cross-sectional view of the outer casing provided in Embodiment 3 of this utility model.

[0052] Label Explanation:

[0053] 1. Outer shell; 11. Inner side plate; 111. Upper plate; 112. Lower plate; 1121. Second through hole; 113. Transition plate; 114. Air supply pressure type; 1141. Upper pressure type; 1142. Lower pressure type; 12. Outer side plate; 13. Side fire plate; 131. Vertical plate; 132. Horizontal plate; 14. Cavity bottom plate; 141. Air inlet; 15. Edge banding; 16. Insert plate; 17. Folding plate; 18. Side end plate; 19. Fixed edge;

[0054] 2. Inner shell; 21. Intermediate fire plate; 22. Inner half shell section; 221. First through hole; 23. Mixing chamber; 24. Injector channel;

[0055] 3. Combustion chamber; 3a. Intermediate combustion chamber; 3b. Side combustion chamber; 4. Flame hole; 4a. Intermediate flame hole; 4b. Side flame hole; 5. Groove; 6. Air supply channel; 61. Air supply port; 62. Air outlet channel; 63. Air intake channel; 64. Air supply chamber; 7. Flame plate structure; 8. Air supply space. Detailed Implementation

[0056] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0058] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0059] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0060] Example 1

[0061] This embodiment provides a burner that can be applied in a burner to improve combustion completeness, reduce harmful substances produced during combustion, and enhance the user experience of the burner.

[0062] like Figures 1 to 4 As shown, in this embodiment, the fire briquette has a connected ejector channel 24 and a combustion chamber 3. The top of the fire briquette has a fire plate structure 7, which covers the upper port of the combustion chamber 3. The fire plate structure 7 has multiple flame holes 4 connected to the combustion chamber 3 along its length. The fire plate structure 7 is recessed downward to form a groove 5, and at least some of the flame holes 4 are located on the groove wall of the groove 5. An air supply channel 6 that is not connected to the combustion chamber 3 is provided inside the fire briquette. The upper end of the air supply channel 6 penetrates the groove wall of the groove 5 to form an air supply port 61, and the lower end of the air supply channel 6 is connected to the external environment.

[0063] The burner provided in this embodiment features an air supply channel 6 within the burner, with its upper end penetrating the wall of a groove 5 to form an air supply port 61. This allows external air to enter the groove 5 through the air supply channel 6, providing air supply for combustion at the flame holes 4. Since the lower end of the air supply channel 6 is connected to the external environment, it fully utilizes the space between the lower parts of two adjacent burners for air supply, avoiding the situation where the airflow is small due to the small distance between the upper parts of two adjacent burners, and the air supply is easily affected by the impact of the combustion gas flow, thus increasing the amount of air that can flow into the air supply channel 6, improving the air supply effect, and thereby enhancing… Combustion completeness; simultaneously, since the air inlet 61 is located at the bottom of the groove 5, the groove wall of the groove 5 can prevent air from escaping when air flows out of the air inlet 61, improving the airflow gathering effect in the groove 5, improving the mixing effect of air and fuel, and further improving the air supply effect and combustion completeness; at the same time, the setting of the groove 5 can increase the available opening area of ​​the flame hole 4 while keeping the width of the burner unchanged, so as to increase the total flame area of ​​the flame hole 4 of a single burner, thereby improving the combustion heat load of a single burner; the setting of the groove 5 can reduce the interference of airflow between burners on the flame, which is conducive to combustion stability.

[0064] In one embodiment, the burner has at least two combustion chambers 3 arranged side-by-side and spaced apart along its width. An air supply channel 6 is provided between each two adjacent combustion chambers 3, and a flame hole 4 is provided for each combustion chamber 3 corresponding to the burner plate structure 7. By providing an air supply channel 6 between any two adjacent combustion chambers 3, air can be supplied to the flame holes 4 of the combustion chambers on both sides, thereby enhancing the completeness of combustion on both sides. Furthermore, by providing at least two combustion chambers 3, the combustion gas can be better diverted and rectified, further improving the completeness of combustion.

[0065] In other embodiments, only one combustion chamber 3 may be provided. The combustion chamber 3 is provided with a channel partition structure, which encloses an air supply channel 6. The air supply channel 6 penetrates the lower wall of the combustion chamber 3 to form an air inlet. The channel partition structure may be a tubular structure or a plate-like structure.

[0066] To improve the combustion performance of the burner, in one embodiment, the burner has three combustion chambers 3 arranged side by side, wherein the middle combustion chamber 3 is the middle combustion chamber 3a, and the two combustion chambers 3 on both sides are the side combustion chambers 3b. The burner plate structure 7 includes a middle burner plate 21 covering the top of the middle combustion chamber 3a and two side burner plates 13 covering the tops of the two side combustion chambers 3b respectively. The middle burner plate 21 and the two side burner plates 13 form a groove 5. The flame holes 4 include a middle flame hole 4a opened in the middle burner plate 21 and a side flame hole 4b opened in the side burner plates 13. The air inlet 61 is located at the joint between the middle burner plate 21 and the side burner plates 13. This arrangement allows the flame holes 4 to be more dispersed, thereby reducing the flame combustion temperature at the flame holes 4, avoiding excessive combustion heat load caused by local high temperature, and thus improving the combustion performance of the burner.

[0067] The air-fuel ratios of the gas mixture in the intermediate combustion chamber 3a and the side combustion chamber 3b are different, which enables the burner to achieve rich and lean combustion, thereby better balancing combustion stability and completeness, reducing the generation of harmful substances, and improving the user experience of the burner.

[0068] In one embodiment, the burner has an ejector channel 24, with the intermediate combustion chamber 3a directly connected to the ejector channel 24. The side combustion chambers 3b are connected to the intermediate combustion chamber 3a via gas vents. An air inlet 141, communicating with the external environment, is provided on the lower wall of the side combustion chamber 3b. When the burner is in use, a mixture of gas and air with a certain air-fuel ratio enters the intermediate combustion chamber 3a through the ejector channel 24. Part of the mixture in the intermediate combustion chamber 3a flows upward to the intermediate flame hole 4a, while part enters the side combustion chambers 3b through the gas vents. Because the side combustion chambers 3b have air inlets 141, external air enters the side combustion chambers 3b and mixes with the mixture in the side combustion chambers 3b. This results in a higher air-fuel ratio in the side combustion chambers 3b than in the intermediate combustion chamber 3a, thereby enhancing the combustion completeness of the side flame holes 4b during burner operation.

[0069] In other embodiments, two ejector channels 24 may be provided, namely a first ejector channel and a second ejector channel. The first ejector channel and the second ejector channel respectively eject mixed gases with different air-fuel ratios. The first ejector channel 24 is connected to the intermediate combustion chamber 3a, and the second ejector channel 24 is connected to the side combustion chamber 3b.

[0070] In one embodiment, the primary air coefficient of the gas mixture in the intermediate combustion chamber 3a is 0.4 to 0.6, and the primary air coefficient of the side combustion chamber 3b is 0.6 to 1.2. That is, the combustion at the intermediate flame hole 4a is rich flame combustion, and the side combustion chamber 3b can be rich flame combustion with a relatively high air-fuel ratio, or it can be lean flame combustion. Specifically, the primary air coefficient of the gas mixture in the intermediate combustion chamber 3a can be, but is not limited to, 0.4, 0.45, 0.5, 0.55, and 0.6, and the primary air coefficient of the gas mixture in the side combustion chamber 3b can be, but is not limited to, 0.6, 0.7, 0.8, 0.9, 1, 1.1, and 1.2.

[0071] In one embodiment, each side flame plate 13 extends obliquely upward in a direction away from the other side flame plate 13, and the side flame plate 13 is provided with a plurality of side flame holes 4b at intervals along its length. This allows the width of the side flame plate 13 to be increased without changing the width of the corresponding combustion chamber 3, thereby increasing the available area for the side flame holes 4b. This further disperses the flame combustion corresponding to the side combustion chamber 3b, thereby improving the heat dissipation performance during flame combustion and improving combustion stability. At the same time, this arrangement allows the upper parts of the flames generated by the combustion of the two side combustion chambers 3b to be relatively concentrated, so as to ensure combustion thermal efficiency.

[0072] The side flame plate 13 is provided with at least two rows of side flame holes 4b spaced apart along its width. Each row of side flame holes 4b includes multiple side flame holes 4b spaced apart along its length, thereby increasing the number of side flame holes 4b on the side flame plate 13 and improving the overall combustion heat load of the flame plate. In other embodiments, only one row of side flame holes 4b may be provided.

[0073] The inclination angle of the side flame plate 13 relative to the vertical direction is A, where 15° ≤ A ≤ 80°. When the width of the side combustion chamber 3b remains constant, a larger value of A indicates that the side flame plate 13 is closer to a horizontal arrangement, meaning a smaller upper surface area and a smaller area available for the side flame holes 4b. An excessively small A value can lead to insufficient number of side flame holes 4b or an excessively small area for any single side flame hole 4b. Conversely, a smaller value of A results in a larger inclination angle of the side flame plate 13 relative to the horizontal plane, leading to a larger surface area. However, this also makes it easier for the flame from the side flame holes 4b to interfere with the flame at the intermediate combustion chamber 3a, resulting in reduced combustion stability. Preferably, 30° ≤ A ≤ 60°.

[0074] In one embodiment, the vertical distance between the upper and lower ends of the side fire plate 13 is 2mm ≤ h ≤ 25mm. Preferably, it is 6mm ≤ d ≤ 18mm.

[0075] Each side flame hole 4b is an elongated hole extending along the width of the side flame plate 13, thereby increasing the contact area between the fuel gas flowing out of the side flame hole 4b and the air. This facilitates better mixing of the fuel gas and air, promotes more complete combustion, reduces unburned fuel gas, reduces the production of harmful substances, improves energy efficiency, and enhances combustion stability. In other embodiments, the side flame hole 4b may also be elliptical, circular, or other shapes. Further, the width of a single side flame hole 4b is 0.5mm to 1mm, and the length of the side flame hole 4b is 2.5mm to 4.5mm.

[0076] In one embodiment, the intermediate flame plate 21 has only one row of intermediate flame holes 4a. In other embodiments, the intermediate flame plate 21 may have two to four rows of intermediate flame holes 4a spaced apart along its width. The number of rows of intermediate flame holes 4a can be specifically set according to the width of the intermediate flame plate 21. The intermediate flame holes 4a are preferably elongated holes extending along the width to increase the flame heat dissipation area and improve combustion completeness.

[0077] In one embodiment, multiple air supply channels 6 are spaced apart along the length direction, which facilitates the control of the air supply amount and improves the uniformity of air supply along the length direction of the burner, thereby improving the combustion uniformity.

[0078] In one embodiment, each combustion chamber 3 is provided with multiple groups of flame holes, which are spaced apart along the length of the burner. Each group of flame holes includes multiple flame holes 4. For any combustion chamber 3, the air inlet 61 and the group of flame holes are staggered along the length of the burner. This arrangement allows the airflow and the gas mixture outflow to be staggered along the length of the burner, avoiding mutual interference between the air and gas mixture outflows, improving the smoothness of airflow and the smoothness of air replenishment. At the same time, this arrangement ensures that the air inlet 61 does not occupy the space for the flame holes 4, meaning that the air inlet 61 and the flame holes 4 can partially overlap in the width of the burner to better ensure the opening area of ​​the flame holes 4.

[0079] Specifically, the side flame plate 13 is provided with multiple side flame hole groups at intervals along the length direction, and each side flame hole group includes multiple side flame holes 4b; the intermediate flame plate 21 is provided with multiple intermediate flame hole groups at intervals along the length direction, and each intermediate flame hole group includes multiple intermediate flame holes 4a. In the length direction, the side flame hole groups and the intermediate flame holes 4a are arranged one-to-one. Multiple air supply ports 61 are staggered with the multiple side flame hole groups located on the same side flame plate 13, and the multiple air supply ports 61 are also staggered with the multiple intermediate flame hole groups on the intermediate flame plate 21.

[0080] like Figures 3 to 6As shown, the burner includes an inner shell 2 and two outer shells 1 disposed on opposite sides of the inner shell 2. The inner shell 2 has a communicating ejector channel 24 and a central combustion chamber 3a, and the outer shells 1 have side combustion chambers 3b and side flame plates 13, or the outer shells 1 and the inner shell 2 enclose each other to form a side combustion chamber 3b. This arrangement allows the burner to have only one ejector channel 24, simplifying the burner structure, reducing the need for a separate gas supply structure, and lowering costs. The upper end of the outer shell 1 is higher than the inner shell 2, and the upper ends of the outer shell 1 and the inner shell 2 enclose each other to form a groove 5.

[0081] In one embodiment, the two outer shells 1 are separately arranged, with the inner shell 2 sandwiched between the two outer shells 1. This facilitates the processing of the outer shell 1 according to the structure of the side combustion chamber 3b, improves the modularity of the outer shell 1, and reduces the processing difficulty of the outer shell 1. In other embodiments, one end of the two outer shells 1 along the length direction is integrally bent and connected, and the other end of the two outer shells 1 along the length direction is connected by riveting, snap-fitting, and / or welding, that is, the two outer shells 1 are integrally formed.

[0082] In one embodiment, the outer shell 1 encloses a circumferentially closed side combustion chamber 3b. Multiple first through holes 221 are respectively opened on opposite sides of the inner shell 2. The side of the outer shell 1 facing the inner shell 2 is fitted with the inner shell 2 and has multiple second through holes 1121. The second through holes 1121 and the first through holes 221 on the same side are directly opposite each other and communicate to form gas vents. This arrangement facilitates ensuring the airtightness of the side combustion chamber 3b through the structural design of the outer shell 1 itself, reducing the fitting requirements and difficulty of fitting the outer shell 1 and the inner shell 2. In other embodiments, the side combustion chamber 3b can also be formed by the outer walls of the outer shell 1 and the inner shell 2 enclosing each other; that is, the outer wall of the inner shell 2 partially forms the cavity wall of the side combustion chamber 3b.

[0083] The inner shell 2 includes two opposing inner half-shell portions 22, which together form an ejector channel 24 and an intermediate combustion chamber 3a. An intermediate fire plate 21 is connected between the two inner half-shell portions 22. The inner shell 2 is preferably integrally formed. The specific structure of the inner shell 2 can be designed with reference to existing technology, which is not the focus of this utility model and will not be limited or described in detail here.

[0084] The intermediate combustion chamber 3a comprises multiple chambers connected sequentially from top to bottom. The width of these chambers gradually decreases from bottom to top in the direction of the burner width. This facilitates communication between the lowermost chamber and the ejector channel 24 while simultaneously reducing the width of the uppermost chamber, thereby increasing the upper width of the side combustion chamber 3b. Simultaneously, this arrangement also causes the width of the side combustion chamber 3b to increase from bottom to top, thus slowing the velocity of the gas mixture exiting the side combustion chamber 3b and preventing combustion instability issues such as flame lift-off. At least the two opposing chamber walls of the uppermost chamber are vertically arranged to rectify the flow of the gas mixture out of the intermediate combustion chamber 3a.

[0085] For example, the intermediate combustion chamber 3a includes a first chamber, a second chamber and a third chamber that are connected from bottom to top. The upper port of the third chamber is the upper port of the intermediate combustion chamber 3a. In the height direction of the burner, the lower end of the side combustion chamber 3b extends to the third chamber. A first through hole 221 is provided on the cavity wall of the second chamber.

[0086] The outer shell 1 includes an outer side plate 12 and an inner side plate 11 arranged opposite to each other and spaced apart. The inner side plate 11 is fitted and connected to the outer side wall of the inner shell 2 and has a second through hole 1121. A side flame plate 13 is connected between the upper end of the inner side plate 11 and the upper end of the outer side plate 12, and a cavity bottom plate 14 is connected between the lower end of the inner side plate 11 and the lower end of the outer side plate 12. The inner side plate 11, the outer side plate 12, the cavity bottom plate 14, and the side flame plate 13 together form a side combustion chamber 3b. This arrangement facilitates the connection between the outer shell 1 and the inner shell 2 and facilitates the processing of the outer shell 1. That is, the outer side plate 12 forms the outer cavity wall of the side combustion chamber 3b, the inner side plate 11 forms the inner cavity wall of the side combustion chamber 3b, and the cavity bottom plate 14 forms the bottom of the side combustion chamber 3b.

[0087] The outer side plate 12 is bent at both ends along its length to form side end plate portions 18. The edges of the side fire plate 13, the cavity bottom plate 14, and the inner side plate 11 all abut against the side end plate portions 18, so that the side end plate portions 18 close the two ends of the side combustion chamber 3b along its length. The side end plate portions 18 are folded outward to form fixed edges 19, which fit against the outer side wall of the inner shell 2. The two ends of the inner shell 2 along its length are sandwiched between the fixed edges 19 at the corresponding ends of the two outer shells 1.

[0088] It is worth noting that the assembly and fastening structure of the inner shell 2 and the outer shell 1 can be set with reference to the existing technology. This is not the focus of this utility model and will not be described in detail here.

[0089] In one embodiment, the inner side plate 11 is stamped with an air injection pressure mold 114 in a direction away from the inner shell 2. The air injection pressure mold 114 and the inner shell 2 form an air injection channel 6. The air injection pressure mold 114 extends from the upper end of the inner side plate 11 to the lower end of the inner side plate 11. This arrangement facilitates the forming of the air injection channel 6 and avoids the air injection channel 6 affecting the direct communication structure between the intermediate combustion chamber 3a and the side combustion chamber 3b.

[0090] In other embodiments, the inner shell 2 may be stamped in a direction away from the outer shell 1 to form a replenishing air pressure type 114, and the replenishing air pressure type 114 and the outer shell 1 may be arranged to form an air replenishing channel 6; or, the inner shell 2 and the outer shell 1 may both be stamped in a direction away from each other to form a replenishing air pressure type 114, and the replenishing air pressure types 114 of the inner shell 2 and the outer shell 1 may be arranged one-to-one and together to form an air replenishing channel 6.

[0091] In one embodiment, multiple second through holes 1121 are spaced apart along the length of the burner, and these multiple second through holes 1121 are staggered with multiple air supply pressure profiles 114. By providing multiple second through holes 1121, the uniformity of gas entering the side combustion chamber 3b can be improved, and the amount of gas entering the side combustion chamber 3b from the intermediate combustion chamber 3a can be guaranteed. The staggered arrangement of the second through holes 1121 and the air supply pressure profiles 114 can ensure the quantity of second through holes 1121 and air supply channels 6 while avoiding interference between structures. Furthermore, the second through holes 1121 are arranged one-to-one with the side burner hole groups and are located below the corresponding side burner hole groups.

[0092] To improve the ease of assembly of the inner shell 2 and the outer shell 1, in one embodiment, the inner side plate 11 includes an upper plate portion 111 and a lower plate portion 112 connected vertically. The upper plate portion 111 is positioned closer to the other outer shell 1 than the lower plate portion 112. The upper plate portion 111 and the lower plate portion 112 are respectively positioned to correspond to different cavities of the intermediate combustion chamber 3a, so that the shape of the inner side plate 11 matches the side shape of the inner shell 2. Both the upper plate portion 111 and the lower plate portion 112 are vertically arranged, and a second through hole 1121 is provided on the lower plate portion 112.

[0093] The air replenishment profile 114 includes an upper pressure profile 1141 disposed at the upper plate portion 111 and a lower pressure profile 1142 disposed at the lower plate portion 112. The upper pressure profile 1141 and the inner shell 2 form an air outlet channel 62, and the lower pressure profile 1142 and the inner shell 2 form an air inlet channel 63. The air outlet channel 62 and the air inlet channel 63 are connected. In one embodiment, the width of the air inlet channel 63 is greater than the width of the air outlet channel 62, so as to increase the air flow velocity out of the air replenishment channel 6 while ensuring the air intake volume of the air replenishment channel 6, thereby improving the smoothness of air replenishment.

[0094] In one embodiment, the cavity bottom plate 14 extends obliquely upward in the direction toward the intermediate combustion cavity 3a, thereby forming a downwardly flared air supply space 8 between the cavity bottom plate 14 and the outer side of the cavity wall of the intermediate combustion cavity 3a. The lower end of the air supply channel 6 communicates with the air supply space 8. This arrangement facilitates the guidance of lower air into the air supply space 8, improves the smoothness of air entering the air supply channel 6, and ensures the amount of air supplied.

[0095] Furthermore, the cavity bottom plate 14 is provided with a plurality of air intake holes 141 at intervals along the length direction. The air intake holes 141 are connected to the air replenishment space 8, which also helps to ensure the smooth flow of external air into the side combustion chamber 3b through the air intake holes 141. The cavity bottom plate 14 is inclined, which can increase the width of the cavity bottom plate 14 without changing the width of the side combustion chamber 3b, thereby facilitating the setting of the air intake holes 141 on the cavity bottom plate 14.

[0096] The cavity bottom plate 14 includes a plurality of protrusions and recesses arranged alternately along its length. The distance between the protrusions and the inner shell 2 is smaller than the distance between the recesses and the inner shell 2. That is, the width of the air replenishment space 8 at the corresponding location in the recess is greater than the width of the air replenishment space 8 at the corresponding location in the protrusion. An air inlet hole 141 is provided on the protrusion, and the recess is arranged one-to-one with the air replenishment channel 6 and is located below the air replenishment channel 6. This arrangement makes the width of the portion of the air replenishment space 8 corresponding to the air inlet channel 63 larger and the width of the portion corresponding to the air inlet hole 141 smaller, which is beneficial for controlling the amount of air entering the air replenishment channel 6 and the amount of air entering the combustion chamber 3 through the air inlet hole 141.

[0097] Furthermore, the protrusion is the main plate-shaped structure of the cavity bottom plate 14, and the recess is formed by stamping, that is, the recess is formed by the air-pressing mold 114 extending to the cavity bottom plate 14, so as to simplify the processing of the outer shell 1 and reduce the processing difficulty of the outer shell 1.

[0098] In one embodiment, the lower end of the outer side plate 12 is folded inward to form a edging portion 15, and a slot is formed between the edging portion 15 and the outer side plate 12. The lower end of the cavity bottom plate 14 is connected to an insert plate portion 16, which is inserted into the slot and pressed between the outer side plate 12 and the edging portion 15.

[0099] In one embodiment, the upper edge of the outer side plate 12 is higher than the upper edge of the side flame plate 13. This arrangement can prevent the flame at the main flame hole from spreading outward, which is beneficial for concentrating the flame at the main flame hole and improving combustion stability. Furthermore, the upper end of the outer side plate 12 is folded inward to form a folded plate portion 17, which fits snugly against the outer side plate 12. The upper end of the side flame plate 13 is connected to the lower end of the folded plate portion 17. In other embodiments, the side flame plate 13 can also be welded or riveted to the outer side plate 12.

[0100] In one embodiment, the outer casing 1 is integrally formed to reduce assembly difficulty. In other embodiments, some structures in the outer casing 1 may also be welded or riveted.

[0101] It is worth noting that, in one embodiment, the ejector channel 24 extends along the length of the fire bar and the air inlet is located on one side of the fire bar along its length, such as... Figure 1 As shown; in another embodiment, the ejector channel 24 can be a C-shaped channel, and two ejector channels 24 are spaced apart along the length of the fire bar, with the air inlets of the two ejector channels 24 facing each other, as shown. Figure 7 As shown. In another embodiment, the ejector channel 24 can extend along the height direction of the combustor and the air inlet can penetrate the lower side of the combustor, that is, the ejector channel 24 is T-shaped, and only one ejector channel 24 is provided, such as... Figure 8 As shown, two can also be set along the length of the fire bar (e.g.) Figure 9As shown), three (as shown) Figure 10 (as shown) or more, and the air outlet ends are all connected to the lower end of the intermediate combustion chamber 3a.

[0102] The specific configuration of the ejector channel 24 can be customized according to the length of the fire bar and the application scenario. This utility model does not limit this.

[0103] This embodiment also provides a burner, including the aforementioned burner array. The burner provided in this embodiment can improve combustion stability, combustion completeness, and combustion safety.

[0104] This embodiment also provides a gas-fired water heater, including the aforementioned burner. The gas-fired water heater provided in this embodiment, by employing the aforementioned burner, can improve combustion stability, combustion completeness, and combustion safety, thereby enhancing the performance of the gas-fired water heater.

[0105] Example 2

[0106] This embodiment provides a fire grid, and the fire grid provided in this embodiment has a structure that is largely the same as that in the above embodiments, with only some differences in settings. This embodiment will not repeat the contents that are the same as those in the above embodiments.

[0107] like Figures 11 to 13 As shown, in this embodiment, the burner has three combustion chambers 3 arranged side by side and separated along the width direction. The three combustion chambers 3 are a central combustion chamber 3a and two side combustion chambers 3b located on opposite sides of the central combustion chamber 3a. The fire plate structure 7 includes a central fire plate 21 covering the top of the central combustion chamber 3a and two side fire plates 13 covering the tops of the two side combustion chambers 3b respectively. The central fire plate 21 and the two side fire plates 13 surround to form a groove 5. The flame hole 4 includes a central flame hole 4a opened in the central fire plate 21 and a side flame hole 4b opened in the side fire plate 13. The air supply port 61 is provided at the joint between the central fire plate 21 and the side fire plate 13.

[0108] Specifically, in this embodiment, the side flame plate 13 includes a vertical plate portion 131 and a horizontal plate portion 132 connected at an angle. The vertical plate portion 131 is connected to the upper end of the horizontal plate portion 132 and extends in a direction away from the middle flame plate 21. The middle flame plate 21 and the two vertical plate portions 131 enclose a groove 5. A side flame hole 4b is provided on the vertical plate portion 131.

[0109] The burner provided in this embodiment has a vertically arranged vertical plate 131 with side flame holes 4b. By increasing the height of the side fire plate 13 while keeping the width of the side combustion chamber 3b unchanged, the area that can be opened by the side flame holes 4b can be increased. This increases the initial area of ​​the side flame holes 4b while reducing the width of the burner, thus reducing the space occupied by the burner and the overall size of the burner. At the same time, the side flame holes 4b of the two side combustion chambers 3b are arranged opposite each other, which can enhance the converging effect of the flames at the upper end of the side flame holes 4b and the middle flame hole 4a, thereby ensuring thermal efficiency.

[0110] In other embodiments, side flame holes 4b may be provided on both the vertical plate portion 131 and the horizontal plate portion 132.

[0111] In this embodiment, the side flame hole 4b is an elongated hole extending in the vertical direction. At least two side flame holes 4b are spaced apart in the vertical direction. Each row of side flame holes 4b includes multiple side flame holes 4b spaced apart in the length direction, thereby increasing the number of side flame holes 4b.

[0112] The height of the side fire plate 13 is preferably 5mm to 12mm, and can be, but is not limited to, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm or 12mm.

[0113] In this embodiment, the firebox includes an inner shell 2 and two opposing outer shells 1. The inner shell 2 is sandwiched between the two outer shells 1. The inner shell 2 has a central combustion chamber 3a and an ejector channel 24. The outer shells 1 have side combustion chambers 3b and side flame holes 4b. The upper end of the outer shells 1 is higher than the inner shell 2, so that the inner shell 2 and the two outer shells 1 form a groove 5. The structure of the outer shell 1 protruding from the upper end of the inner shell 2 and the top of the inner shell 2 together form a fire plate structure 7. This arrangement simplifies the structure of the firebox and facilitates modular design. Air supply channels 6 are formed on the opposite sides of the inner shell 2 and the two outer shells 1 respectively.

[0114] In other embodiments, the fire plate structure 7 can be separately formed from the inner shell 2 and the outer shell 1, that is, the middle combustion chamber 3a of the inner shell 2 and the side combustion chamber 3b of the outer shell 1 are both open at the top, and the fire plate structure 7 is installed on the inner shell 2 and the outer shell 1 to cover the upper openings of the middle combustion chamber 3a and the side combustion chamber 3b respectively.

[0115] In this embodiment, the vertical plate portion 131 is recessed in a direction away from the other vertical plate portion 131 to form an air replenishment pressure type 114. The air replenishment pressure type 114 extends to the horizontal plate portion 132 to form an air replenishment port 61. The concave space of the air replenishment pressure type 114 forms the upper channel of the air replenishment channel 6. By extending the air replenishment channel 6 to the horizontal plate portion 132, the flow of air in the air replenishment channel 6 can be better guided, ensuring that the arrangement of the air replenishment channel 6 provides air replenishment to the side flame hole 4b located at the upper end.

[0116] Multiple side flame hole groups are spaced apart along the length of the side flame plate 13, and each side flame hole group includes multiple side flame holes 4b. Multiple intermediate flame hole groups are spaced apart along the length of the intermediate flame plate 21, and each intermediate flame hole group includes multiple intermediate flame holes 4a. In the length direction, the side flame hole groups and the intermediate flame holes 4a are arranged one-to-one. Multiple air supply ports 61 are staggered with the multiple side flame hole groups located on the same side flame plate 13, and the multiple air supply ports 61 are also staggered with the multiple intermediate flame hole groups on the intermediate flame plate 21, thereby improving the air supply smoothness to the flame holes 4 of the side flame hole groups.

[0117] In this embodiment, the upper end of the inner side plate 11 of the outer shell 1 extends in the same direction as the vertical plate portion 131, and the air pressure replenishment type 114 extends from the upper end of the vertical plate portion 131 to the lower end of the inner side plate 11. The air pressure replenishment type 114 and the corresponding side of the inner shell 2 form an air replenishment channel 6. Specifically, the upper plate portion 111 of the inner side plate 11 extends in the same direction as the vertical plate portion 131.

[0118] The remaining structure of the firebox can be set with reference to the above embodiment, and will not be described again in this embodiment.

[0119] Example 3

[0120] This embodiment provides a burner and a burner including the burner, which can improve the combustion completeness and combustion stability of the burner and enhance the user experience of the burner.

[0121] like Figures 14 to 17 As shown, the firebox has a connected ejector channel 24 and a combustion chamber 3. The top of the firebox has a fire plate structure 7, which covers the upper port of the combustion chamber 3. The fire plate structure 7 has multiple flame holes 4 connected to the combustion chamber 3 along its length. The fire plate structure 7 is recessed downward to form a groove 5, and at least some of the flame holes 4 are located on the groove wall of the groove 5. An air supply channel 6 that is not connected to the combustion chamber 3 is provided inside the firebox. The upper end of the air supply channel 6 penetrates the groove wall of the groove 5 to form an air supply port 61, and the lower end of the air supply channel 6 is connected to the external environment.

[0122] In this embodiment, there are two combustion chambers 3 arranged side by side. The fire plate structure 7 includes two side fire plates 13 respectively covering the upper end of the two combustion chambers 3. The two side fire plates 13 surround and form a V-shaped groove 5. Each side fire plate 13 is provided with multiple flame holes 4 along the length direction of the fire plate. The air supply port 61 is provided at the joint of the two side fire plates 13.

[0123] This configuration allows the air supply channel 6 to supply air to the flames at the flame holes 4b on both sides, improving combustion completeness. Simultaneously, the V-shaped arrangement of the two side flame plates 13 creates an opposing arrangement of flames at the flame holes 4b on both sides, which helps to improve the concentration of the flames at the top and enhances combustion stability and reliability. Furthermore, placing the air supply port 61 at the junction of the two side flame plates 13 facilitates the installation of the air supply channel 6 and avoids the air supply port 61 occupying space in the flame holes 4b, ensuring the available space for the flame holes 4b.

[0124] In one embodiment, the inclination angle of the side fire plate 13 relative to the vertical direction is 30°~60°, specifically, but not limited to 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc., to increase the area of ​​the side fire plate 13 while keeping the width of the fire bar unchanged, thereby increasing the available area for opening the flame holes 4b, which is beneficial to increasing the number of flame holes 4b and the area of ​​each opening. The length of the side fire plate 13 in the vertical direction is preferably 5mm~12mm, specifically, but not limited to 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm or 12mm, etc.

[0125] In one embodiment, the burner has a mixing chamber 23 located between two combustion chambers 3. The mixing chamber 23 is connected to the ejector channel 24. The mixing chamber 23 is connected to the two combustion chambers 3 through gas vent holes. The gas mixture of gas and air ejected by the ejector channel 24 enters the mixing chamber 23 and then enters the two combustion chambers 3 through the gas vent holes on both sides, and then flows out from the flame hole 4b.

[0126] In this embodiment, the burner includes an inner shell 2 and two outer shells 1 arranged opposite to each other. The outer shell 1 has a combustion chamber 3 and a side flame plate 13. The inner shell 2 has an ejector channel 24 and a mixing chamber 23. The upper part of the inner shell 2 is sandwiched between the lower parts of the two outer shells 1. A first through hole 221 is provided on each of the opposite sides of the inner shell 2. A second through hole 1121 is provided on each side of the outer shell 1 facing the inner shell 2. The second through hole 1121 is connected to the first through hole 221 on the corresponding side to form a gas vent.

[0127] By setting an inner shell 2 and two outer shells 1, with the inner shell 2 sandwiched between the two outer shells 1, it is beneficial to realize the modular setting of the outer shells 1, reduce the processing difficulty and processing cost of the outer shells 1, and facilitate the assembly of the burner. At the same time, this setting is beneficial to the formation of the air supply channel 6. Furthermore, by setting the shape of the combustion chamber 3 and the flame hole 4b on the outer shell 1, the processing accuracy of the flame hole 4b is improved, and the circumferential sealing of the combustion chamber 3 is guaranteed, thereby improving the safety of the burner in use.

[0128] In this embodiment, the air replenishment channel 6 includes an air replenishment chamber 64 and an air intake channel 63 that are connected vertically. The air intake channel 63 is located between the inner shell 2 and the outer shell 1. The upper end of the inner shell 2 and the two outer shells 1 are arranged to form the air replenishment chamber 64. The air replenishment port 61 is connected to the air replenishment chamber 64. By setting the air intake channel 63 between the inner shell 2 and the outer shell 1, it is convenient to form the air intake channel 63 by the inner shell 2 and the outer shell 1. By setting the air replenishment chamber 64 and setting the air replenishment chamber 64 above the inner shell 2, the upper end of the inner shell 2 does not need to be attached to the upper end of the outer shell 1, simplifying the fitting structure of the inner shell 2 and the outer shell 1. While ensuring that the upper ends of the two outer shells 1 fit into a V-shaped structure, it improves the smoothness of the connection between the air intake channel 63 and the air replenishment port 61 on both sides of the inner shell 2.

[0129] The upper parts of the two outer shells 1 are partially fitted together and partially enclosed to form an air outlet channel 62. The upper end of the air outlet channel 62 forms an air inlet 61, and the lower end of the air outlet channel 62 is connected to the air inlet chamber 64. This arrangement ensures that the upper parts of the two outer shells 1 are tightly fitted and vertically arranged. This arrangement helps to ensure the stability and reliability of the connection between the upper parts of the two outer shells 1, and also helps to rectify the mixed gas flowing out of the combustion chamber 3.

[0130] In another embodiment, the air supply port 61 can also be directly connected to the air supply chamber 64. Multiple air supply ports 61 can be spaced apart along the length direction, or they can be elongated openings extending along the length of the burner. In yet another embodiment, the air supply channel 6 can also be without the air supply chamber 64, with the air inlet channel 63 and the air outlet channel 62 directly connected to form the air supply channel 6.

[0131] Multiple air outlet channels 62 and multiple air inlet channels 63 are spaced apart along the length of the burner and are arranged correspondingly. The upper end of each air inlet channel 63 is connected to the air supply chamber 64, and the lower end of each air outlet channel 62 is connected to the air supply chamber 64. This arrangement simplifies the arrangement of the air supply channels 6 and avoids the air supply channels 6 affecting the air intake of the combustion chamber 3, thus improving the local structural rationality of the burner. At the same time, the arrangement of multiple air inlet channels 63 and multiple air outlet channels 62 can increase the amount of air supplied and improve the uniformity of air supply along the length of the burner.

[0132] To facilitate the fit between the outer shell 1 and the inner shell 2, the outer shell 1 has an outer side plate 12 and an inner side plate 11 arranged opposite to each other and spaced apart. A side fire plate 13 is connected between the upper ends of the inner side plate 11 and the outer side plate 12, and a cavity bottom plate 14 is connected between the lower ends of the inner side plate 11 and the lower ends of the outer side plate 12. The upper parts of the inner side plates 11 of the two outer shells 1 are partially fitted together and partially enclosed to form an air outlet channel 62 and an air inlet 61. The lower parts of the two inner side plates 11 are relatively open, and the upper part of the inner shell 2 is sandwiched between the lower parts of the two inner side plates 11. The opposite sides of the inner shell 2 are respectively enclosed with the two inner side plates 11 to form an air inlet channel 63. An air inlet cavity 64 is formed between the upper end of the inner shell 2 and the two inner side plates 11.

[0133] In one embodiment, the inner side plate 11 includes an upper plate portion 111, a transition plate portion 113, and a lower plate portion 112 connected sequentially from top to bottom; the upper plate portions 111 of the two outer shells 1 are fitted together, and the upper plate portion 111 is stamped to form an upper pressing portion 1141 in a direction away from the other upper plate portion 111. The upper pressing portions 1141 of the two upper plate portions 111 are correspondingly arranged and surround to form an air outlet channel 62 and an air inlet 61; the transition plate portions 113 of the two outer shells 1 extend downward at an angle away from each other, so that the lower plate portions 112 of the two outer shells 1 are opposite to each other and spaced apart. The transition plate portions 113 of the two outer shells 1 surround the upper part of the inner shell 2 to form an air inlet cavity 64; the inner shell 2 is sandwiched between the lower plate portions 112 of the two outer shells 1, and each lower plate portion 112 is stamped to form a lower pressing portion 1142 in a direction away from the inner shell 2. The lower pressing portion 1142 surrounds the inner shell 2 to form an air inlet channel 63. This configuration facilitates the processing and forming of the air intake channel 63, the air outlet channel 62, and the air replenishment chamber 64. At the same time, the upper pressing part 1141 and the lower pressing part 1142 are formed by stamping on the inner side plate 11, which can enhance the overall structural strength and rigidity of the inner side plate 11, reduce the probability of deformation of the inner side plate 11, and improve the structural stability and reliability of the outer shell 1.

[0134] In another embodiment, the inner shell 2 may be stamped with a pressing portion 1142 in a direction away from the outer shell 1, and the pressing portion 1142 and the inner side plate 11 may together form an air intake channel 63. In yet another embodiment, both the inner shell 2 and the inner side plate 11 may be provided with pressing portions 1142, and the pressing portions on the inner shell 2 and the inner side plate 11 may be correspondingly provided and surround each other to form the air intake channel 63.

[0135] Other structures of the outer casing 1 and other structures of the fire bar can be limited with reference to the above embodiments, and will not be described again in this embodiment.

[0136] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0137] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A fire grate, characterized in that, The fire bar has a connected ejector channel (24) and a combustion chamber (3). The top of the fire bar has a fire plate structure (7). The fire plate structure (7) covers the upper port of the combustion chamber (3). The fire plate structure (7) has multiple flame holes (4) connected to the combustion chamber (3) along its length. The fire plate structure (7) is recessed downward to form a groove (5). The flame holes (4) are located on the groove wall of the groove (5). The burner is provided with an air supply channel (6) that is not connected to the combustion chamber (3). The upper end of the air supply channel (6) penetrates the groove wall of the groove (5) to form an air supply port (61). The lower end of the air supply channel (6) is connected to the external environment.

2. The fire grate of claim 1, wherein, The fire bar has at least two combustion chambers (3) arranged side by side and separated along the width direction. The fire bar is provided with an air supply channel (6) between two adjacent combustion chambers (3). The fire plate structure (7) is provided with a flame hole (4) for each combustion chamber (3).

3. The fire grate of claim 2, wherein, The fire bar has three combustion chambers (3) arranged side by side and separated along the width direction. The three combustion chambers (3) are a middle combustion chamber (3a) and two side combustion chambers (3b) located on opposite sides of the middle combustion chamber (3a). The fire plate structure (7) includes an intermediate fire plate (21) covering the top of the intermediate combustion chamber (3a) and two side fire plates (13) covering the top of the two side combustion chambers (3b), respectively. The intermediate fire plate (21) and the two side fire plates (13) surround to form the groove (5). The flame hole (4) includes an intermediate flame hole (4a) opened in the intermediate fire plate (21) and a side flame hole (4b) opened in the side fire plate (13). The air inlet (61) is located at the joint between the intermediate fire plate (21) and the side fire plate (13).

4. The fire grill according to claim 3, characterized in that, Each of the side fire plates (13) extends upward at an angle away from the middle fire plate (21).

5. The fire grate of claim 4, wherein, The angle between the side fire plate (13) and the vertical direction is 30°~60°; And / or, the height of the side fire plate (13) in the vertical direction is 5mm~12mm; And / or, the side flame plate (13) is provided with at least two rows of side flame holes (4b) spaced apart along the width direction, and each row of side flame holes (4b) includes a plurality of side flame holes (4b) spaced apart along the length direction of the flame plate.

6. The fire grate of claim 3, wherein, The side flame plate (13) includes a vertical plate portion (131) and a horizontal plate portion (132) connected at an angle. The horizontal plate portion (132) is connected to the upper end of the vertical plate portion (131) and extends in a direction away from the intermediate flame plate (21). The intermediate flame plate (21) and the two vertical plate portions (131) together form the groove (5). The side flame hole (4b) is provided on the vertical plate portion (131) and / or the horizontal plate portion (132).

7. The fire grate of any of claims 3-6, wherein, The fire bar has an ejector channel (24), which is connected to the intermediate combustion chamber (3a). The intermediate combustion chamber (3a) is connected to the side combustion chambers (3b) on both sides. The side combustion chambers (3b) have air inlets (141) on their walls, which are connected to the external environment. Alternatively, the firebox has two ejector channels (24), which are respectively the first ejector channel and the second ejector channel. The intermediate combustion chamber (3a) is connected to the first ejector channel (24), and the two side combustion chambers (3b) are connected to the second ejector channel (24).

8. The fire grill according to claim 7, characterized in that, The firebox includes an inner shell (2) and two outer shells (1). The inner shell (2) is sandwiched between the two outer shells (1). The inner shell (2) has the intermediate combustion chamber (3a) and the ejector channel (24). The outer shells (1) have the side combustion chambers (3b). The upper end of the outer shells (1) is higher than the upper end of the inner shell (2). The upper end of the inner shell (2) and the upper ends of the two outer shells (1) surround and form the groove (5).

9. The fire grate of claim 2, wherein, The combustion chamber (3) is arranged in two parallel rows. The fire plate structure (7) includes two side fire plates (13) respectively covering the upper ends of the two combustion chambers (3). The two side fire plates (13) surround the V-shaped groove (5). Each side fire plate (13) is provided with multiple flame holes (4) along the length of the fire plate. The air supply port (61) is located at the joint of the two side fire plates (13).

10. The fire grate of claim 9, wherein, The burner has an ejector channel (24) and a mixing chamber (23) located between the two combustion chambers (3). The ejector channel is connected to the mixing chamber (23), the mixing chamber (23) is connected to the two combustion chambers (3), and the air supply channel (6) is separated from the mixing chamber (23).

11. The fire grate of claim 10, wherein, The firebox includes an inner shell (2) and two outer shells (1) arranged opposite to each other. The outer shell (1) has the combustion chamber (3) and the side fire plate (13). The inner shell (2) has the ejector channel (24) and the mixing chamber (23). The upper part of the inner shell (2) is sandwiched between the lower parts of the two outer shells (1). The inner shell (2) has a first through hole (221) on each of its opposite sides. The outer shell (1) has a second through hole (1121) on each side facing the inner shell (2). The second through hole (1121) is connected to the first through hole (221) on the corresponding side.

12. The fire grill according to claim 11, characterized in that, The air replenishment channel (6) includes an air replenishment chamber (64) and an air intake channel (63) that are connected vertically. The air intake channel (63) is located between the inner shell (2) and the outer shell (1). The upper end of the inner shell (2) and the two outer shells (1) are arranged to form the air replenishment chamber (64). The air replenishment port (61) is connected to the air replenishment chamber (64). And / or, the upper parts of the two outer shells (1) are partially fitted together and partially enclosed to form an air outlet channel (62), the upper port of the air outlet channel (62) forms the air replenishment port (61), the lower part of the outer shell (1) and the inner shell (2) are enclosed to form an air inlet channel (63), the air inlet channel (63) and the air outlet channel (62) are connected to form the air replenishment channel (6).

13. The fire grate of claim 12, wherein, The exhaust channel (62) and the intake channel (63) are each provided at intervals along the length of the fire bar and are provided in a corresponding manner. The upper end of each intake channel (63) is connected to the air replenishment chamber (64), and the lower end of each exhaust channel (62) is connected to the air replenishment chamber (64).

14. The fire grate of claim 12, wherein, The outer shell (1) has a cavity bottom plate (14) forming the bottom of the combustion chamber (3). The cavity bottom plate (14) extends downward at an angle away from the inner shell (2) so that the cavity bottom plate (14) and the inner shell (2) enclose an air replenishment space (8). The lower end of the air intake channel (63) is connected to the air replenishment space (8). And / or, the outer casing (1) has a bottom plate (14) forming the bottom of the combustion chamber (3), and an air inlet (141) is provided on the bottom plate (14), which is in communication with the external environment.

15. The fire rack according to any one of claims 1-6 or any one of claims 9-14, characterized in that, Each combustion chamber (3) is provided with multiple groups of fire holes. The multiple groups of fire holes corresponding to each combustion chamber (3) are spaced apart along the length of the fire bar. Each group of fire holes includes multiple flame holes (4). The air supply port (61) is provided at intervals along the length of the fire bar, and the air supply port (61) is provided between two adjacent fire hole groups along the length of the fire bar.

16. A burner characterized by Includes the fire rack as described in any one of claims 1-15.

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