Fire grate, burner and gas water heating apparatus

Abstract

The utility model belongs to the combustion technical field, specifically discloses a kind of fire, combustor and gas hot water equipment.Fire includes inner shell and inner core piece.Inner shell is surrounded and is formed with the first injection passage and first gas passage of intercommunication, and the upper portion of inner shell has two rectifier vertical board parts that are relatively arranged and spaced apart in width direction;Inner core piece is inserted in the upper portion of first gas passage and has two rectifier board parts that are relatively arranged and spaced apart, and vertical intermediate flow passage is formed between two rectifier board parts, and the lower portion of each rectifier board part is formed with core plate profile stamping in the direction away from each other, and core plate profile stamping is vertically arranged and is in contact with rectifier vertical board part of corresponding side, and the upper end of core plate profile stamping is spaced apart with rectifier board part to form air vent, and the upper portion of each rectifier board part is formed with side flow passage with upper open between rectifier vertical board part, and side flow passage is communicated with air vent of corresponding side.The utility model can reduce the processing difficulty of fire, improve the stability of combustion.

Description

Technical Field

[0001] This utility model relates to the field of combustion technology, and in particular to an inner core component, a burner, and a burner. 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 stability and other properties directly affect the performance of the gas water heating equipment.

[0003] Burners typically include multiple burners arranged side-by-side. To reduce pollutants generated during combustion and improve combustion completeness, existing technologies provide a burner arrangement such as... Figure 1 As shown, it includes an inner shell 100 and an outer shell 200 disposed outside the inner shell 100. The inner shell 100 has a light flame channel, and the outer shell 200 and the outer wall of the inner shell 100 together form a dense flame channel. A dense flame hole is formed between the upper ends of the outer shell 200 and the inner shell 100. An inner core 300 is disposed inside the inner shell 100. The inner core 300 is composed of multiple single plates 301. A flow channel 302 is formed between two adjacent single plates 301, the lower end of which communicates with the light flame channel. A light flame hole is formed at the upper end of the flow channel 302. The inner shell 100 is formed by pressing the opposite sides inward to form an inner shell mold 101. The two outermost single plates 301 abut against the inner shell mold 101 on the corresponding side.

[0004] Although the existing technology provides a fire purifier with an inner core 300 that divides the flame channel along the width direction to form multiple parallel flow channels 302 to rectify the flow of gas, the inner core 300 has a complex manufacturing process. It requires multiple stamping and bending followed by multi-point electric welding to form multiple flow channels 302, resulting in low processing efficiency and high processing cost. 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 high processing cost of the burner due to the complex processing of the inner core component in the existing burner, and reduce processing cost while rectifying and diverting the gas flow in the inner shell.

[0006] The second technical problem solved by this utility model is to provide a burner that can effectively solve the problem of high burner processing cost caused by the high processing cost of the burner grate in existing burners, and reduce burner cost while improving combustion stability.

[0007] The third technical problem solved by this utility model is to provide a gas-fired water heater that can effectively solve the problem of increased cost of existing gas-fired water heaters due to the high processing cost of burners.

[0008] The first technical problem mentioned above is solved by the following technical solution:

[0009] A fire grill, comprising:

[0010] The inner shell surrounds and forms a first ejector channel and a first gas channel, and the upper part of the inner shell has two rectifier vertical plates that are opposite to each other and spaced apart in the width direction.

[0011] The inner core component is inserted into the upper part of the first gas passage and has two rectifier plates that are opposite to each other and spaced apart. A vertical intermediate flow channel is formed between the two rectifier plates. The lower part of each rectifier plate is stamped with a core plate forming in a direction away from each other. The core plate forming is vertically arranged and abuts against the rectifier vertical plate on the corresponding side. The upper end of the core plate forming is spaced apart from the rectifier plate to form a vent. An open side flow channel is formed between the upper part of each rectifier plate and the rectifier vertical plate, and the side flow channel is connected to the vent on the corresponding side.

[0012] Compared with the prior art, the firebox described in this utility model has the following advantages: Since the inner core component has two rectifier plates and a core plate with a vent is formed by stamping at the lower part of the rectifier plates, a middle flow channel is formed between the two rectifier plates, while a side flow channel is formed between the rectifier plates and the vertical rectifier plates. The side flow channel is connected to the first gas passage through the vent, thereby dividing the upper part of the first gas passage into three vertical flow channels along the width of the inner shell. This achieves the diversion and rectification of the gas flow inside the inner shell, ensuring combustion stability and reducing harmful substances produced during combustion. Because the core plate abuts against the vertical rectifier plates, it prevents the inner shell from collapsing inward, better ensuring the dimensional accuracy of the side flow channels, thus ensuring combustion stability and reliability. Furthermore, the inner core component can be stably installed inside the inner shell, ensuring the overall structural stability and reliability of the firebox. Moreover, the inner core component only has two opposing rectifier plates, effectively simplifying the structure of the inner core component and reducing its processing cost, thereby reducing the overall processing cost of the firebox.

[0013] In one embodiment, the recessed area of ​​the core plate forming forms a ventilation channel, the ventilation channel extending vertically through both ends of the core plate forming, and the upper end of the ventilation channel forms the ventilation port;

[0014] And / or, the core plate molding is provided in multiple ways at intervals along the length direction of the inner shell;

[0015] The height of the rectifier plate is H, and the height of the core plate forming is h, where 0.4H ≤ h ≤ 0.6H.

[0016] In one embodiment, the lower end of the core plate forming extends to the lower end of the rectifier plate portion;

[0017] In one embodiment, the upper ends of the two rectifier plates are stamped with inner core grouping molds in the direction toward each other. Each rectifier plate has multiple inner core grouping molds spaced apart along the length of the rectifier plate. The inner core grouping molds of the two rectifier plates are arranged in a one-to-one correspondence and fit together.

[0018] In one embodiment, the core plate forming is provided in multiple groups at intervals along the length direction of the inner core, each group including a plurality of core plate formings at intervals along the length direction, wherein each inner core group forming is located between two groups of core plate formings in the length direction.

[0019] In one embodiment, an extension plate extends downward from the lower end of the rectifier plate located between the two sets of core plate forming.

[0020] In one embodiment, the rectifier vertical plate portion is stamped to form a first inner shell profile in the direction toward the inner core component. The first inner shell profile abuts against the rectifier plate portion. In the length direction of the inner shell, the first inner shell profile is located between two core plate profiles in the same group.

[0021] And / or, the rectifier vertical plate portion is stamped to form a second inner shell die along the direction toward the inner core, and the second inner shell die is provided in a one-to-one correspondence with the inner core group die on the same side.

[0022] In one embodiment, the first inner shell forming interval is disposed above the core plate forming in the height direction.

[0023] In one embodiment, the firebox further includes an outer shell, which is fitted onto the upper outer side of the inner shell. The outer shell and the outer walls of the inner shell along the width direction respectively form a second gas passage. The inner shell has a second ejector passage, and the lower end of the second gas passage is connected to the second ejector passage. The upper end of the inner shell is folded outward to form an outward flange, which abuts against the inner wall of the outer shell.

[0024] In one embodiment, the outwardly flanged portion is provided with a plurality of external fire holes spaced apart along its length.

[0025] In one embodiment, the distance between the external flame hole and the rectifier vertical plate is d1, and the distance between the external flame hole and the inner wall of the outer casing on the corresponding side is d2, where d2 < d1.

[0026] The second technical problem mentioned above is solved by the following technical solution:

[0027] A burner comprising a fire bar as described above.

[0028] Compared with the prior art, the burner described in this utility model has the following advantages: by adopting the above-mentioned burner, the combustion stability and reliability of the burner are improved, while the structure of the burner is simplified and the cost of the burner is reduced.

[0029] The third technical problem mentioned above is solved by the following technical solution:

[0030] A gas-fired hot water appliance includes a burner as described above.

[0031] Compared with the prior art, the gas-fired water heater of this utility model has the following advantages: by adopting the above-mentioned burner, the combustion stability and reliability of the gas-fired water heater are improved, while the structure of the gas-fired water heater is simplified and the cost of the gas-fired water heater is reduced. Attached Figure Description

[0032] Figure 1 A partial cross-sectional view of a fire dam provided for the prior art;

[0033] Figure 2 A schematic diagram of the structure of the fire briquette provided in an embodiment of this utility model;

[0034] Figure 3 for Figure 2 A magnified view of a section at point I;

[0035] Figure 4 A partial cross-sectional view of the fire briquette provided in an embodiment of this utility model;

[0036] Figure 5 A schematic diagram of the inner shell provided in an embodiment of this utility model;

[0037] Figure 6 This is a schematic diagram of the structure of the fire duct after removing the outer shell, as provided in an embodiment of the present utility model;

[0038] Figure 7 for Figure 6 A magnified view of a section at point J;

[0039] Figure 8 This is a schematic diagram of the structure of the inner core component provided in an embodiment of the present utility model.

[0040] Figure 1 middle:

[0041] 100. Inner shell; 101. Inner shell molding; 200. Outer shell; 300. Inner core; 301. Single sheet of sheet metal; 302. Flow channel;

[0042] Figures 2 to 8 middle:

[0043] 1. Inner core component; 11. Rectifier core plate; 111. Rectifier plate section; 1111. Vent notch; 112. Core plate molding; 1121. Molding bottom; 1122. Molding side; 113. Extension plate section; 114. Inner core group molding; 115. Vent port; 116. Vent channel; 12. Intermediate flow channel; 13. First intermediate flame hole;

[0044] 2. Inner shell; 21. Inner half shell; 211. Rectifying vertical plate; 212. Outer flange; 2121. Outer flame hole; 2122. Flame stabilizing hole; 213. First inner shell molding; 214. Second inner shell molding; 215. Connecting hole; 22. First gas passage; 23. First ejector passage; 24. Second ejector passage;

[0045] 3. Outer shell; 31. Outer half shell; 311. Outer shell molding; 32. Connecting bridge;

[0046] 4. Second gas passage; 5. Side flow passage; 6. Second intermediate burner hole. Detailed Implementation

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] This embodiment provides a fire grating that can reduce the processing difficulty of the fire grating, improve the processing accuracy of the fire grating, and improve combustion stability.

[0052] like Figures 2 to 4 As shown, in this embodiment, the burner includes an inner shell 2, an outer shell 3, and an inner core 1. The inner shell 2 has a first ejector channel 23, a second ejector channel 24, and a first gas passage 22. The upper end of the first gas passage 22 is open, and its lower end is connected to the first gas passage 22. The upper end of the inner shell 2 has two rectifier vertical plates 211 that are opposite to each other and spaced apart in the width direction. The inner core 1 is inserted into the upper part of the first gas passage 22 and has two opposite to each other and spaced apart rectifier plates 111. A vertical through-beam is formed between the two rectifier plates 111. The intermediate flow channel 12 is open. Each rectifier plate portion 111 has a core plate mold 112 stamped at its lower part in a direction away from each other. The core plate mold 112 is vertically arranged and abuts against the corresponding rectifier vertical plate portion 211. The upper end of the core plate mold 112 is spaced apart from the rectifier plate portion 111 to form a vent 115. An open side flow channel 5 is formed between the upper part of each rectifier plate portion 111 and the rectifier vertical plate portion 211, and the side flow channel 5 communicates with the corresponding vent 115. The outer shell 3 is fitted onto the upper outer side of the inner shell 2, and the outer shell 3 and the inner shell 2 have second gas passages 4 formed on their respective outer walls along the width direction. The inner shell 2 has a second ejector channel 24, and the lower end of the second gas passage 4 communicates with the second ejector channel 24.

[0053] The upper port of the intermediate flow channel 12 forms the first intermediate flame hole 13, the upper port of the side flow channel 5 forms the second intermediate flame hole 6, and the flame hole connected to the second gas passage 4 forms the outer flame hole 2121.

[0054] The burner provided in this embodiment has two rectifier plate sections 111 in the inner core component 1, and a core plate molding 112 with a vent 115 is formed by stamping the lower part of the rectifier plate section 111. This forms an intermediate flow channel 12 between the two rectifier plate sections 111, and a side flow channel 5 between the rectifier plate section 111 and the rectifier vertical plate section 211. The side flow channel 5 is connected to the first gas passage 22 through the vent 115. As a result, the inner core component 1 divides the upper part of the first gas passage 22 into three vertical flow channels along the width direction of the inner shell 2, thereby realizing the diversion of the gas flow inside the inner shell 2. The core plate 112 abuts against the rectifier vertical plate 211, which prevents the inner shell 2 from collapsing inward, better ensuring the dimensional accuracy of the side flow channel 5, thereby ensuring the stability and reliability of combustion. It also allows the inner core 1 to be stably set inside the inner shell 2, ensuring the overall structural stability and reliability of the fire grid. Furthermore, the inner core 1 has only two opposing rectifier plates 111, which can effectively simplify the structure of the inner core 1, reduce the processing cost of the inner core 1, and thus reduce the processing cost of the entire fire grid.

[0055] In this embodiment, since both the side channel 5 and the intermediate channel 12 are connected to the first gas passage 22, and the first gas passage 22 is connected to the first ejector channel 23, while the second gas passage 4 formed between the outer shell 3 and the inner shell 2 is connected to the second ejector channel 24, the air-fuel ratio of the gas-air mixture ejected by the first ejector channel 23 and the second ejector channel 24 can be controlled, thereby controlling the air-fuel ratio of the mixture in the first gas passage 22 and the second gas passage 4. This allows the burner to achieve rich-lean combustion, improving combustion completeness and reducing harmful substances produced during combustion. Specifically, the first intermediate flame hole 13 and the second intermediate flame hole 6 are either a light flame hole or a rich flame hole, and the outer flame hole 2121 forms the other one. It is worth noting that the principle of rich-lean combustion is existing technology and will not be elaborated upon here.

[0056] In other embodiments, the fire vent may not have an outer shell 3. In this case, the inner shell 2 has only a first ejector channel 23 and no second ejector channel 24.

[0057] The inner shell 2 includes two inner half-shells 21 arranged opposite each other in the width direction. The lower ends and both ends of the two inner half-shells 21 are sealed together so that the two inner half-shells 21 enclose a first ejector channel 23, a second ejector channel 24, and a first gas passage 22. The outer shell 3 includes two outer half-shells 31 arranged opposite each other in the width direction. The two outer half-shells 31 are connected at both ends in the length direction, and the two ends of the inner shell 2 are sandwiched between the two outer half-shells 31. The lower end of each outer half-shell 31 is sealed and fastened to the corresponding inner half-shell 21 to enclose a second gas passage 4 with an open upper end. The inner half-shell 21 has a connecting hole 215 corresponding to the first ejector channel 23, and the connecting hole 215 connects the second ejector channel 24 and the second gas passage 4.

[0058] It is worth noting that the structure in which the inner shell 2 surrounds to form the first ejector channel 23, the second ejector channel 24 and the first gas channel 22, as well as the structure in which the inner shell 2 and the outer shell 3 surround to form the second gas channel 4, can be set with reference to the prior art. This is not the focus of this utility model and will not be described in detail here.

[0059] like Figures 3 to 5 As shown, in one embodiment, the upper end of the inner shell 2 is folded outward to form an outward flange 212, which abuts against the inner wall of the outer shell 3. By providing the outward flange 212 that abuts against the inner wall of the outer shell 3, the outer shell 3 can be prevented from collapsing inward, thereby ensuring the dimensional stability of the upper end of the second gas passage 4, and thus ensuring that the gas flows vertically out of the second gas passage 4, and ensuring the stability of gas combustion.

[0060] In one embodiment, the outwardly flanged portion 212 extends along the length of the inner shell 2 to both ends of the rectifying vertical plate portion 211. The outwardly flanged portion 212 is provided with a plurality of external flame holes 2121 spaced apart along its length, and the external flame holes 2121 communicate with the second gas passage 4. This arrangement allows for control of the size of the external flame holes 2121 through the processing of the inner shell 2, ensuring the dimensional accuracy of the external flame holes 2121 and thus guaranteeing the combustion performance of the flame at the external flame holes 2121. Simultaneously, by providing multiple external flame holes 2121, the flame heat dissipation area at the external flame holes 2121 can be increased, reducing localized high temperatures and thereby reducing harmful substances produced during combustion.

[0061] In another embodiment, the upper end of the second gas passage 4 may be open to form an external flame hole 2121; in another embodiment, the outer flange portion 212 may be provided with a plurality of portions spaced along the length direction of the rectifier vertical plate portion 211, and an external flame hole 2121 may be formed between two adjacent rectifier vertical plate portions 211.

[0062] In one embodiment, the distance between the outer flame hole 2121 and the rectifier vertical plate portion 211 is d1, and the distance between the outer flame hole 2121 and the inner sidewall of the corresponding outer shell 3 is d2, where 0 < d1 < d2. Since d1 > 0, the outer flame hole 2121 is spaced apart from the outer shell 3, which can reduce the problem of flame lift-off at the outer flame hole 2121 caused by secondary air supply at the outer shell 3, and improve the combustion stability at the outer flame hole 2121. Since d2 > d1, the outer flame hole 2121 is relatively far from the second intermediate flame hole 6, which can reduce flame interference between the second intermediate flame hole 6 and the outer flame hole 2121, reduce the probability of local high temperature generation, and further improve combustion stability.

[0063] In one embodiment, the outer flame hole 2121 is an elongated hole extending along the length of the inner shell 2 to reduce processing costs. Simultaneously, while ensuring the gas flow rate of the outer flame hole 2121, its width is reduced. This reduces the size of the outwardly flanged portion 212 while maintaining a certain distance between the outer flame hole 2121 and the second intermediate flame hole 6, thereby reducing the overall size of the burner. In other embodiments, the outer flame hole 2121 can also be a rectangular hole extending along the length of the inner shell 2. The width of the outer flame hole 2121 is preferably 0.5mm to 2mm.

[0064] To further improve combustion stability, in one embodiment, flame stabilizing holes 2122 are provided at both ends of the outward flange 212 along its length. The flame stabilizing holes 2122 can stabilize the flame at both ends of the second intermediate flame hole 6, thereby further improving combustion stability. The flame stabilizing holes 2122 are preferably circular holes, and the area of ​​the flame stabilizing holes 2122 is smaller than the area of ​​the outer flame hole 2121.

[0065] In one embodiment, a connecting bridge 32 is provided between the two outer shells 31. The connecting bridge 32 extends along the width direction of the inner shell 2 and is provided at intervals along the length direction of the inner shell 2. The connecting bridge 32 can ensure the consistency of the spacing between the upper ends of the two outer shells 31. Thus, by tightening the connecting bridge 32, the reliability and tightness of the contact between the outer flange 212 and the outer shell 31 are ensured.

[0066] Each outer shell 31 is stamped with an outer shell profile 311 in the direction toward the inner shell 2. The outer shell profile 311 abuts against the inner shell 2, and multiple outer shell profiles 311 are spaced apart along the length direction to ensure the dimensional accuracy of the upper part of the second gas passage 4. In the length direction, the outer shell profiles 311 and the connecting bridges 32 are arranged one-to-one to facilitate the grouping of flame combustion corresponding to the second gas passage 4, thereby reducing the combustion temperature. That is, multiple sets of outer flame holes 2121 are spaced apart along the length direction. In the length direction, the connecting bridges 32 are located between two adjacent sets of outer flame holes 2121, and each set of outer flame holes 2121 includes one outer flame hole 2121 or multiple outer flame holes 2121 spaced apart along the length direction.

[0067] like Figures 4 to 8 As shown, in one embodiment, the inner core 1 includes two rectifier core plates 11 disposed opposite each other. Each rectifier core plate 11 includes the aforementioned rectifier plate portion 111 and core plate molding 112. The two rectifier core plates 11 are connected at both ends along the length direction, so that the intermediate flow channel 12 formed by the two rectifier core plates 11 is closed at both ends along the length direction. The two rectifier core plates 11 can be separately disposed and riveted at both ends, or the two rectifier core plates 11 can be integrally disposed and bent at one end and riveted at the other end. Both ends of the inner core 1 along the length direction are sandwiched between two inner half shells 21.

[0068] Multiple core plate moldings 112 are spaced apart along the length of the rectifier plate portion 111 to ensure the amount of gas entering the side flow channel 5, and to reduce the size of a single core plate molding 112, thereby reducing the processing difficulty of the inner core component 1 and improving the structural strength and rigidity of the inner core component 1. At the same time, multiple core plate moldings 112 abut against the rectifier vertical plate portion 211, which can effectively ensure the consistency of the spacing between the rectifier plate portion 111 and the rectifier vertical plate portion 211 in the length direction of the inner core component 1, thereby better ensuring the dimensional accuracy of the side flow channel 5 and improving the stability of the gas flowing out of the side flow channel 5.

[0069] In one embodiment, a ventilation channel 116 is formed in the recessed area of ​​the core plate molding 112. The ventilation channel 116 extends vertically through both ends of the core plate molding 112, and an air vent 115 is formed at the upper end of the ventilation channel 116. This allows the gas flowing from the upstream of the inner core 1 to the lower end of the inner core 1 to flow vertically and directly upward through the ventilation channel 116 to the air vent 115, and then through the air vent 115 to the side flow channel 5. This ensures the smooth flow of the mixed gas flow and the gas flow speed, avoiding the problem of insufficient gas flow or significantly affected flow velocity caused by the sudden narrowing of the flow channel when the gas flows from the first gas channel 22 to the inner core 1.

[0070] In other embodiments, the lower end of the core board molding 112 can be closed, that is, the lower end of the ventilation channel 116 is connected to the intermediate flow channel 12, so that part of the mixed gas introduced into the inner core 1 flows to the side flow channel 5 through the ventilation channel 116 and the ventilation port 115, and part flows upward along the intermediate flow channel 12 to the first intermediate fire hole 13.

[0071] To reduce the processing difficulty of the inner core 1, in one embodiment, the lower end of the core plate molding 112 extends to the lower end of the rectifier plate portion 111, that is, the lower end of the core plate molding 112 is flush with the lower end of the rectifier plate portion 111. This simplifies the processing of the core plate molding 112, reduces processing costs, and improves the smoothness of airflow into the ventilation channel 116. In another embodiment, the lower end of the core plate molding 112 is higher than the lower end of the rectifier plate portion 111, and the lower end of the core plate molding 112 is separated from the rectifier plate portion 111 to form an airflow hole, allowing the mixed gas outside the inner core 1 to flow into the ventilation channel 116.

[0072] In one embodiment, the height of the rectifier plate 111 is H, and the height of the core plate molding 112 is h, where 0.4H≤h≤0.6H. This ensures that the core plate molding 112 has a certain length to guarantee the pressure support effect on the rectifier vertical plate 211, while also avoiding the core plate molding 112 being too long and the side channel 5 being too short, thus affecting the rectification effect of the side channel 5 on the mixed gas.

[0073] In one embodiment, the upper end of the rectifier plate portion 111 is flush with the upper end of the rectifier vertical plate portion 211, and the height of the rectifier vertical plate portion 211 is h1, where H = 1.2h1 to 2h1, so as to ensure that the inner core component 1 can extend to the upstream position of the first gas passage 22 and improve the rectification effect of the inner core component 1.

[0074] In one embodiment, the core plate molding 112 has a U-shaped structure, including a molding bottom 1121 and two molding side portions 1122 connected to opposite sides of the molding bottom 1121. The molding side portions 1122 are connected to the rectifier plate portion 111. The molding bottom 1121 is vertically arranged and abuts against the rectifier vertical plate portion 211 to ensure the vertical arrangement of the ventilation channel 116 formed by the core plate molding 112, ensuring that the mixed gas can flow vertically upward through the ventilation channel 116 to the side channel 5, ensuring the rectification effect, and thus improving combustion stability. Furthermore, the included angle between the molding side portions 1122 and the molding bottom 1121 is an obtuse angle to facilitate the processing of the core plate molding 112. The included angle between the molding side portions 1122 and the molding bottom 1121 is greater than 90° and less than 145°.

[0075] In one embodiment, the rectifier plate portion 111 has a venting notch 1111 at the upper end of the core plate molding 112. The venting notch 1111 extends along the length direction of the inner core 1 to both ends of the core plate molding 112. By providing the venting notch 1111, the smoothness of the mixed gas flowing out of the venting port 115 from the venting channel 116 can be improved, and the processing difficulty of the core plate molding 112 can be reduced. The venting notch 1111 is an elongated opening extending along the length direction of the inner core 1.

[0076] In one embodiment, the width of the intermediate flow channel 12 is W1, and the width of the side flow channel 5 is W2, where W1 > W2. Since the second intermediate flame holes 6 on both sides have relatively large heat dissipation space, setting the width of the side flow channel 5 to be smaller than the width of the intermediate flow channel 12 can prevent the flame at the second intermediate flame holes 6 from being too large and insufficient for heat dissipation, reducing the probability of localized high temperatures, improving combustion stability, and reducing the probability of nitrogen oxide generation. Further, 0.5mm ≤ W1 ≤ 0.7mm, and 0.7mm ≤ W2 ≤ 2mm.

[0077] In one embodiment, the upper ends of the two rectifier plates 111 are stamped with inner core grouping molds 114 in a direction toward each other. Multiple inner core grouping molds 114 are spaced apart along the length of the rectifier core plate 11, and the inner core grouping molds 114 of the two rectifier core plates 11 are fitted together in a one-to-one correspondence. Thus, the inner core grouping molds 114 divide the upper opening of the intermediate flow channel 12 into multiple first intermediate flame holes 13 along the length direction. This allows for the grouping of the flames burning in the intermediate flow channel 12, reducing the flame combustion temperature of the first intermediate flame holes 13, thereby reducing the amount of nitrogen oxides produced. Furthermore, the inner core grouping molds 114 are arranged in a one-to-one correspondence with the connecting bridge 32.

[0078] Multiple sets of core plate moldings 112 are arranged at intervals along the length of the rectifier core plate 11. Each set includes one core plate molding 112 or several core plate moldings 112 arranged at intervals along the length. In the length of the rectifier core plate 11, each inner core group molding 114 is located between two adjacent sets of core plate moldings 112. Thus, the mixed gas flowing between the two sets of core plate moldings 112 can flow upward to the inner core group molding 114 and then flow to both sides of the length direction under the guidance of the inner core group molding 114, ensuring the flow guiding and grouping effect of the inner core group molding 114.

[0079] In one embodiment, in the height direction, the lower end of the inner core group molding 114 is higher than the height of the vent 115, so that after the gas flows to the inner core group molding 114, it can continue to flow upward on both sides, thereby reducing the probability that the mixed gas in the middle flow channel 12 will flow out of the inner core 1 through the vent 115, ensuring the smoothness and stability of the mixed gas flow in the middle flow channel 12, and facilitating the control of the amount of gas flowing out of the middle flow channel 12 and the side flow channel 5.

[0080] In one embodiment, an extension plate portion 113 extends downward from the lower end of the rectifier plate portion 111 located between the two sets of core plate forming 112, thereby increasing the length of the intermediate flow channel 12 between the two sets of core plate forming 112 and improving the rectification effect of the intermediate flow channel 12 on the flow of mixed gas.

[0081] To further ensure the dimensional accuracy of the side flow channel 5, in one embodiment, the rectifier vertical plate portion 211 is stamped with a first inner shell mold 213 along the direction toward the inner core 1. The first inner shell mold 213 abuts against the rectifier plate portion 111, and in the length direction of the inner shell 2, the first inner shell mold 213 is located between two core plate molds 112 in the same group. Thus, the abutment between the first inner shell mold 213 and the rectifier plate portion 111 better ensures the dimensional accuracy of the side flow channel 5, guarantees the rectification and flow stabilization effect of the side flow channel 5, and simultaneously enhances the structural strength and rigidity of the inner shell 2 at the rectifier vertical plate portion 211, reducing the probability of the rectifier vertical plate portion 211 collapsing inward. Furthermore, placing the first inner shell mold 213 between two core plate molds 112 in the same group avoids interference between the first inner shell mold 213 and the core plate mold 112 when the inner core 1 is inserted into the inner shell 2, improving the assembly smoothness of the burner.

[0082] In the height direction, the first inner shell molding 213 is higher than the inner core molding, which can ensure the dimensional accuracy of the upper part of the side channel 5, reduce the probability of the upper end of the rectifier vertical plate 211 collapsing inward, improve the stability of the mixed gas flow in the side channel 5, and thus improve the combustion stability.

[0083] In one embodiment, the upper end of the rectifier vertical plate portion 211 is stamped with a second inner shell mold 214 in the direction toward the inner core 1. The second inner shell mold 214 is provided in a one-to-one correspondence with the inner core grouping mold 114 on the same side. By providing the second inner shell mold 214, the upper opening of the side flow channel 5 can be grouped by the second inner shell mold 214, thereby enhancing the heat dissipation area of ​​the flame at the second intermediate flame hole 6 and reducing the probability of local high temperature generation.

[0084] To ensure the combustion grouping effect of the flame at the second intermediate flame hole 6, in one embodiment, the lower end of the second inner shell molding 214 is lower than the lower end of the inner core group molding 114, and the upper part of the second inner shell molding 214 is spaced apart from the inner core group molding 114. The lower part of the second inner shell molding 214 abuts against the rectifier plate part 111. This reduces the stamping depth of the second inner shell molding 214 while achieving flow diversion of the mixed gas in the side flow channel 5.

[0085] In another embodiment, the length of the second inner shell molding 214 along the inner core 1 is greater than the length of the inner core grouping molding 114 along the length direction of the inner core 1, and both ends of the second inner shell molding 214 along the length direction of the inner core 1 abut against the rectifier plate portion 111 to further improve the grouping effect.

[0086] This embodiment also provides a burner including the aforementioned burner grates. The burner provided in this embodiment, by employing the aforementioned burner grates, can improve combustion stability, reduce the generation of harmful substances, improve combustion safety, and simultaneously reduce the manufacturing cost of the burner.

[0087] This embodiment also provides a gas-fired water heater, including the burner described above. By using the burner, combustion stability can be improved, harmful substances produced during combustion can be reduced, combustion safety can be improved, and the cost of the gas-fired water heater can be reduced.

[0088] 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.

[0089] 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 grill, characterized in that, include: The inner shell (2) surrounds and forms a first ejector channel (23) and a first gas channel (22) that are connected. The upper part of the inner shell (2) has two rectifier vertical plate portions (211) that are opposite to each other and spaced apart in the width direction. The inner core component (1) is inserted into the upper part of the first gas passage (22) and has two rectifier plate parts (111) that are opposite to each other and spaced apart. A vertical intermediate flow channel (12) is formed between the two rectifier plate parts (111). The lower part of each rectifier plate part (111) is stamped with a core plate mold (112) in a direction away from each other. The core plate mold (112) is vertically arranged and abuts against the rectifier vertical plate part (211) on the corresponding side. The upper end of the core plate mold (112) is spaced apart from the rectifier plate part (111) to form a vent (115). An open side flow channel (5) is formed between the upper part of each rectifier plate part (111) and the rectifier vertical plate part (211). The side flow channel (5) is connected to the vent (115) on the corresponding side.

2. The fire grill according to claim 1, characterized in that, The recessed area of ​​the core board molding (112) forms a ventilation channel (116), the ventilation channel (116) extends vertically through both ends of the core board molding (112), and the upper end of the ventilation channel (116) forms the ventilation port (115). And / or, the core plate forming (112) is provided in a plurality of spaced intervals along the length direction of the inner shell (2); And / or, the height of the rectifier plate (111) is H, and the height of the core plate forming (112) is h, where 0.4H≤h≤0.6H.

3. The fire grill according to claim 2, characterized in that, The lower end of the core plate forming (112) extends to the lower end of the rectifier plate portion (111).

4. The fire grill according to claim 1, characterized in that, The upper ends of the two rectifier plate sections (111) are stamped with inner core grouping molded forms (114) in the direction toward each other. The inner core grouping molded forms (114) of each rectifier plate section (111) are arranged in multiple intervals along the length direction of the rectifier plate section (111). The inner core grouping molded forms (114) of the two rectifier plate sections (111) are arranged in a one-to-one correspondence and fit together.

5. The fire grill according to claim 4, characterized in that, The core plate forming (112) is arranged in multiple groups along the length direction of the inner core (1), each group including a plurality of core plate forming (112) arranged at intervals along the length direction. In the length direction, each inner core group forming (114) is located between two groups of core plate forming (112).

6. The fire grill according to claim 5, characterized in that, An extension plate portion (113) extends downward from the lower end of the rectifier plate portion (111) located between the two sets of core plate forming (112).

7. The fire grill according to claim 5, characterized in that, The rectifier vertical plate portion (211) is stamped to form a first inner shell profile (213) in the direction toward the inner core (1). The first inner shell profile (213) abuts against the rectifier plate portion (111). In the length direction of the inner shell (2), the first inner shell profile (213) is located between the two core plate profiles (112) in the same group. And / or, the upper end of the rectifier vertical plate portion (211) is stamped with a second inner shell die (214) in the direction toward the inner core (1), and the second inner shell die (214) is provided in a one-to-one correspondence with the inner core group die (114) on the same side.

8. The fire grill according to claim 7, characterized in that, In the height direction, the first inner shell molding (213) is spaced above the core plate molding (112).

9. The fire rack according to any one of claims 1-8, characterized in that, The firebox also includes an outer shell (3), which is fitted onto the upper outer side of the inner shell (2). The outer shell (3) and the outer walls of the inner shell (2) along the width direction respectively form a second gas passage (4). The inner shell (2) has a second ejector passage (24). The lower end of the second gas passage (4) is connected to the second ejector passage (24). The upper end of the inner shell (2) is folded outward to form an outer flange (212), which abuts against the inner wall of the outer shell (3).

10. The fire grill according to claim 9, characterized in that, The outer flange (212) extends along the length of the inner shell (2) to both ends of the rectifier vertical plate (211). The outer flange (212) is provided with a plurality of external flame holes (2121) at intervals along the length direction. The external flame holes (2121) are connected to the second gas passage (4).

11. The fire briquette according to claim 10, characterized in that, The distance between the external fire hole (2121) and the rectifier vertical plate (211) is d1, and the distance between the external fire hole (2121) and the inner wall of the outer shell (3) on the corresponding side is d2, 0 < d2 < d1; And / or, flame stabilizing holes (2122) are provided at both ends of the outward flange (212) along the length direction.

12. A burner, characterized in that, Includes the fire rack as described in any one of claims 1-11.

13. A gas-fired hot water device, characterized in that, Includes the burner as described in claim 12.

Images