Fire grate, burner and gas water heater

Abstract

This utility model relates to the field of combustion technology and discloses a burner, a burner, and a gas water heater. The burner of this utility model includes a burner body and a flame plate. Along the length of the burner body, the spacing between two adjacent rectifier holes in the first rectifier zone is greater than the spacing between two adjacent rectifier holes in the second rectifier zone. The first rectifier zone is located directly above the bend of the bend, which increases the resistance of the gas mixture passing through the top wall of the head directly above the bend of the bend. This reduces the amount of gas entering the flow stabilizing chamber directly above the bend and decreases the flow velocity of the gas mixture. Consequently, it effectively reduces the flow rate of the gas mixture directly passing through the flame holes directly above the bend of the bend and reduces the airflow velocity in this area. This improves the uniformity of the gas mixture distribution at the flame holes along the length of the burner, enhances the uniformity of flame distribution and the stability of gas mixture combustion, and further reduces combustion noise and the emission of combustion pollutants.

Description

Technical Field

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

[0002] The burner is the core component of a gas water heater. It consists of multiple burners arranged side-by-side, and the quality of the burner design directly affects the stability of the combustion system and the overall performance of the gas water heater. The burner includes the burner body, which has an ejector section, a bending section, and a head connected in sequence. The top of the head has a flame hole. In existing technologies, the ejector section is a bent structure. At the flame hole directly above the bend in the bending section, the airflow is high and the airflow velocity is fast. The uneven distribution of the gas mixture flow and velocity above the bend leads to insufficient and uneven combustion of the gas mixture at the flame hole, as well as uneven flame distribution, resulting in increased combustion noise and more pollutants in the flue gas. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a burner that effectively improves the uniformity of combustion of the gas mixture at the flame holes and the uniformity of flame distribution, thereby reducing combustion noise and emissions of flue gas pollutants.

[0004] The above-mentioned technical problems are solved by the following technical solutions:

[0005] A fire grill, comprising:

[0006] The fire duct body includes an ejector section, a bending section, and a head that are sequentially connected along the height direction of the fire duct body. The top wall of the head includes a first rectifying zone and a second rectifying zone arranged side by side along the length direction of the fire duct body. Both the first rectifying zone and the second rectifying zone are provided with rectifying holes. Along the length direction of the fire duct body, the hole spacing between two adjacent rectifying holes in the first rectifying zone is greater than the hole spacing between two adjacent rectifying holes in the second rectifying zone. The first rectifying zone is located directly above the bend of the bending section. A flame orifice plate is sleeved on the head and forms a flow stabilizing cavity with the head. The flame orifice plate is provided with flame holes. The rectifying holes communicate with the flame holes through the flow stabilizing cavity.

[0007] Compared with the background art, the burner row of the present utility model has the following beneficial effects: For the burner row with this structure, along the length direction of the burner row body, the hole pitch between two adjacent rectifying holes in the first rectifying area directly above the bending part of the bending section is greater than the hole pitch between two adjacent rectifying holes in the second rectifying area. In this way, the resistance of the gas mixture passing through the top wall of the head directly above the bending part of the bending section can be increased, the amount of gas entering the steady flow chamber directly above the bending part of the bending section can be reduced, and the flow rate of the mixture in this area can be decreased. Then the gas mixture flows from the steady flow chamber to the flame holes, so that the flow rate of the mixture directly passing through the flame holes from directly above the bending part of the bending section can be effectively reduced, and at the same time, the air flow velocity in this area can be decreased. This can improve the distribution uniformity of the mixture at the flame holes in all parts along the length direction of the burner row, so that the mixture can burn evenly at the flame holes, improve the uniformity of the flame distribution and the stability of the mixture combustion, and further reduce the combustion noise and the emission of combustion pollutants.

[0008] In one embodiment, along the length direction of the burner row body, the length of the head is L, the length of the first rectifying area is L1, and the length of the second rectifying area is L2, where 0.1 < L1 / L < 0.3 and 0.6 < L2 / L < 0.8; the total opening area of all the rectifying holes in the first rectifying area is S1, and the total opening area of all the rectifying holes in the second rectifying area is S2, and S1:S2 = 1:(3 - 6.5).

[0009] In one embodiment, the second rectifying area includes a first rectifying part, a second rectifying part and a third rectifying part. The first rectifying part, the second rectifying part and the third rectifying part are arranged side by side in sequence along the direction away from the bending part of the bending section; the opening area of a single rectifying hole on the side of the first rectifying part away from the bending part of the bending section is larger than the opening area of a single rectifying hole of the second rectifying part; the opening area of a single rectifying hole of the second rectifying part is larger than the opening area of a single rectifying hole of the third rectifying part.

[0010] In one embodiment, the opening area of a single rectifying hole on the side of the first rectifying part away from the bending part of the bending section is equal to the opening area of a single rectifying hole in the first rectifying area, and is larger than the opening area of a single rectifying hole on the side of the first rectifying part close to the bending part of the bending section.

[0011] In one embodiment, the rectifying holes are strip-shaped holes, the rectifying holes extend along the width direction of the burner row body, and multiple rectifying holes are arranged at intervals along the length direction of the burner row body.

[0012] In one embodiment, the rectifying holes of the first rectifying part, the second rectifying part and the third rectifying part are arranged at equal intervals.

[0013] In one embodiment, the length of the first rectifier is L3, the length of the second rectifier is L4, and the length of the third rectifier is L5, then 0.3 <L3 / L2<0.45,0.2<L4 / L2<0.55,0.15<L5 / L2<0.35。

[0014] In one embodiment, the flame orifice plate includes two first side plates disposed opposite to each other and a first top plate disposed on top of the first side plates. The head includes two second side plates disposed opposite to each other and a second top plate disposed on top of the second side plates. The lower part of the first side plate abuts against the second side plate, and the upper part of the first side plate is spaced apart from the second side plate. The rectifier hole is disposed on the second top plate, and the flame hole is disposed on the first top plate.

[0015] In one embodiment, the first side plate is provided with an abutting portion that abuts against the outer wall surface of the second side plate.

[0016] In one embodiment, the head includes equal-width channels and gradually widening channels arranged vertically along the height direction of the fire briquette body. Along the width direction of the fire briquette body, the gradually widening channels are wider at the top and narrower at the bottom, and the narrow end of the gradually widening channels is connected to the equal-width channels.

[0017] And / or, the flame hole includes multiple main flame holes and multiple auxiliary flame holes, the opening area of ​​a single auxiliary flame hole is smaller than the opening area of ​​a single main flame hole, the main flame hole is strip-shaped, and the auxiliary flame holes are respectively provided on both sides of the length direction of each main flame hole.

[0018] On the other hand, this utility model also provides a burner including the burner grates described in any of the above embodiments. The burner includes a burner grates and has the same technical effects as a burner grates, which will not be described again here.

[0019] Furthermore, this utility model also provides a gas water heater, including the aforementioned burner. The gas water heater includes a burner plate and has the same technical effects as a burner plate, which will not be described in detail here. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of a fire briquette according to an embodiment of the present utility model;

[0022] Figure 2 for Figure 1 The exploded diagram of the firebox shown;

[0023] Figure 3 for Figure 2 Top view of the center burner body;

[0024] Figure 4 for Figure 1 The cross-sectional view of the firebox shown.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Flame duct body; 11. Ejector section; 12. Bending section; 13. Head; 131. Rectifying hole; 132. First rectifying zone; 133. Second rectifying zone; 1330. First rectifying section; 1331. Second rectifying section; 1332. Third rectifying section; 135. Second side plate; 136. Second top plate; 137. Equal width channel; 138. Gradually widening channel; 2. Flame hole plate; 21. Flame hole; 211. Main flame hole; 212. Auxiliary flame hole; 22. First side plate; 23. First top plate; 24. Abutment section; 3. Flow stabilizing cavity. Detailed Implementation

[0027] 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.

[0028] In the description of this application, it should be understood that the terms "length direction", "height direction", "width direction", "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.

[0029] 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.

[0030] 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.

[0031] In related technologies, the gas-air mixture entering from the ejector section 11 of the burner tends to rush upwards to the flame hole 21 after passing through the bend of the bend section 12. This results in a large gas flow rate and high gas velocity at the flame hole 21 directly above the bend section 12, which in turn leads to uneven gas flow rate and velocity at the flame holes 21 along the length of the burner, affecting the stability of gas combustion.

[0032] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.

[0033] According to an embodiment of the present invention, a fire duct is provided, comprising a fire duct body 1 and a fire hole plate 2.

[0034] The fire duct body 1 includes an ejector section 11, a bending section 12, and a head 13 connected sequentially along the height direction of the fire duct body 1. The top wall of the head 13 includes a first rectifying zone 132 and a second rectifying zone 133 arranged side by side along the length direction of the fire duct body. Both the first rectifying zone 132 and the second rectifying zone 133 are provided with rectifying holes 131. Along the length direction of the fire duct body 1, the hole spacing between two adjacent rectifying holes 131 in the first rectifying zone 132 is greater than the hole spacing between two adjacent rectifying holes 131 in the second rectifying zone 133. The first rectifying zone 132 is located directly above the bend of the bending section 12. A flame orifice plate 2 is sleeved on the head 13 and forms a flow stabilizing cavity 3 with the head 13. The flame orifice plate 2 is provided with flame holes 21. The rectifying holes 131 are connected to the flame holes 21 through the flow stabilizing cavity 3.

[0035] The burner row of this structure makes the hole pitch between two adjacent rectifying holes 131 in the first rectifying area 132 directly above the bending part of the bending part 12 greater than the hole pitch between two adjacent rectifying holes 131 in the second rectifying area 133. Such a setting can increase the resistance of the gas mixture passing through the top wall of the head 13 directly above the bending part of the bending part 12, reduce the amount of gas entering the steady flow cavity 3 directly above the bending part of the bending part 12, and reduce the flow rate of the gas mixture in this area. The gas mixture then flows from the steady flow cavity 3 to the flame holes 21, thereby effectively reducing the flow rate of the gas mixture directly passing through the flame holes 21 from directly above the bending part of the bending part 12. At the same time, the air flow velocity in this area can be reduced, the distribution uniformity of the gas mixture at the flame holes 21 in each part of the burner row in the length direction can be improved, so that the gas mixture can burn evenly at the flame holes 21, the uniformity of the flame distribution and the stability of the gas mixture combustion can be improved, and thus the combustion noise can be reduced and the emission of combustion pollutants can be reduced.

[0036] In some embodiments, as Figure 3 shown, along the length direction of the burner row body, the length of the head 13 is L, the length of the first rectifying area 132 is L1, the length of the second rectifying area 133 is L2, 0.1 < L1 / L < 0.3, 0.6 < L2 / L < 8; the total opening area of all the rectifying holes 131 in the first rectifying area 132 is S1, the total opening area of all the rectifying holes 131 in the second rectifying area 133 is S2, S1:S2 = 1:(3 - 6.5); thus, by controlling the lengths of the two rectifying areas and the ratio of the total opening areas of the rectifying holes 131 in the two rectifying areas, the gas mixture passing through the rectifying holes 131 in the two rectifying areas can be evenly distributed and vertically upward, and the combustion uniformity and stability of the gas mixture can be improved.

[0037] Furthermore, in this embodiment, as Figure 3As shown, the second rectification region 133 includes a first rectification section 1330, a second rectification section 1331, and a third rectification section 1332. The first rectification section 1330, the second rectification section 1331, and the third rectification section 1332 are arranged side by side in sequence along the direction away from the bend of the bending section 12. The opening area of ​​a single rectification hole 131 on one side of the first rectification section 1330 away from the bend of the bending section 12 is larger than the opening area of ​​a single rectification hole 131 of the second rectification section 1331. The opening area of ​​a single rectification hole 131 of the second rectification section 1331 is larger than that of the third rectification section 1332. The opening area of ​​a single rectifier orifice 131 of 332 is such that the third rectifier 1332 is furthest from the bend of the bending section 12, the second rectifier 1331 is next furthest from the bend of the bending section 12, and the first rectifier 1330 is closest to the bend of the bending section 12. The gas mixture flows into the bending section, with a large portion directly impacting the area above the first rectifier 132. Due to the presence of the top wall of the burner body 1 head, the amount of gas mixture increases the further away from the bend of the bending section 12. Therefore, a single portion of the first rectifier 1330, on the side furthest from the bending section 12, is used. The opening area of ​​the rectifier orifice 131 is larger than the opening area of ​​a single rectifier orifice 131 in the second rectifier section 1331; the opening area of ​​a single rectifier orifice 131 in the second rectifier section 1331 is larger than the opening area of ​​a single rectifier orifice 131 in the third rectifier section 1332, that is, the flow resistance of a single rectifier orifice 131 in the third rectifier section 1332 is greater than the flow resistance of a single rectifier orifice 131 in the second rectifier section 1331, and the flow resistance of a single rectifier orifice 131 in the second rectifier section 1331 is greater than the flow resistance of a single rectifier orifice 131 in the portion of the first rectifier section 1330 away from the bending portion 12. The flow resistance of 1 ensures that the gas mixture is evenly distributed at the flame holes along the length of the burner under the influence of the flow resistance, which can improve the uniformity of flame distribution and the stability of gas mixture combustion, thereby reducing combustion noise and emissions of combustion pollutants. At the same time, the gas mixture generates a stronger vortex effect further away from the bend of the bend 12. The flow direction is corrected by the rectifier hole 131 of the third rectifier 1332, which can reduce the tilting phenomenon of the airflow and make the gas mixture flow vertically upward out of the flame hole 21, thereby improving the uniformity and stability of combustion.

[0038] Furthermore, such as Figure 3As shown, in this embodiment, the length of the first rectifying portion 1330 is L3, the length of the second rectifying portion 1331 is L4, and the length of the third rectifying portion 1332 is L5. Then, 0.3 < L3 / L2 < 0.45, 0.2 < L4 / L2 < 0.55, and 0.15 < L5 / L2 < 0.35. Similarly, by controlling the lengths of the first rectifying portion 1330, the second rectifying portion 1331, and the third rectifying portion 1332, the uniformity of the flame distribution in the second rectifying zone 133 and the stability of the mixture combustion can be improved, thereby reducing the combustion noise and the emission of combustion pollutants.

[0039] As Figure 3 shown, in some embodiments, the rectifying holes 131 are strip-shaped holes. The rectifying holes 131 extend along the width direction of the burner row. A plurality of rectifying holes 131 are arranged at intervals along the length direction of the burner row body. The strip-shaped holes are more convenient for processing than a plurality of circular holes and a plurality of small rectangular holes, and it is convenient to arrange the strip-shaped holes orderly on the top wall of the head 13. In addition, a plurality of strip-shaped rectifying holes 131 are arranged at intervals along the length direction of the top wall of the head 13, so that the rectifying holes 131 have a good rectifying effect, and the inclined flowing mixture gas can flow vertically upward through the rectifying holes 131.

[0040] In some embodiments, as Figure 3 shown, the rectifying holes 131 of the first rectifying portion 1330, the second rectifying portion 1331, and the third rectifying portion 1332 are arranged at equal intervals. In this way, it is convenient to open the rectifying holes 131 on the top wall of the head 13, improve the uniformity of the mixture gas distribution at the flame holes 21, and is beneficial to the uniform distribution of the mixture gas and the uniform and stable combustion of the gas.

[0041] As Figure 3 shown, the rectifying holes 131 in the first rectifying zone 132 and the second rectifying zone 133 are arranged in the middle along the width direction of the top wall of the head 13. In this way, the ends of the rectifying holes 131 can be far away from the edge of the top wall of the head 13, which is beneficial to ensuring the overall strength of the head 13.

[0042] In some embodiments, as Figure 2 and Figure 3As shown, the opening area of ​​a single rectifier hole 131 on the side of the first rectifier 1330 away from the bend of the bend 12 is equal to the opening area of ​​a single rectifier hole 131 in the first rectifier region 132, and is greater than the opening area of ​​a single rectifier hole 131 on the side of the first rectifier 1330 near the bend of the bend 12. Thus, the opening area of ​​a single rectifier hole 131 in the part of the first rectifier 1330 at the junction of the first rectifier region 132 and the first rectifier 1330 is smaller than that of a single rectifier hole 131 in the first rectifier region 132. This can reduce the amount of mixed gas flowing out of the first rectifier 1330 through the rectifier hole 131 in the junction area of ​​the first rectifier region 132 and the first rectifier 1330, which is beneficial to the uniform distribution of the mixed gas and the uniform and stable combustion of the gas.

[0043] like Figure 4 As shown, the flame plate 2 is fitted on the head 13 and forms a flow stabilizing cavity 3 with the head 13. The high-speed airflow flowing out through the rectifier hole 131 enters the flow stabilizing cavity 3 for diffusion and deceleration. The mixed gas is evenly distributed in the flow stabilizing cavity 3 and then flows out evenly upward from the flow stabilizing cavity 3 through the flame hole 21, thereby achieving a flow stabilizing effect, which can improve the uniformity of gas distribution and the stability of combustion.

[0044] like Figure 4 As shown, in some embodiments, the flame orifice plate 2 includes two opposing first side plates 22 and a first top plate 23 on top of the first side plates 22. The head 13 includes two opposing second side plates 135 and a second top plate 136 on top of the second side plates 135. The lower part of the first side plate 22 abuts against the second side plate 135, and the upper part of the first side plate 22 is spaced apart from the second side plate 135. The rectifier hole 131 is provided on the second top plate 136, and the flame hole 21 is provided on the first top plate 23. The lower part of the first side plate 22 abuts against the second side plate 135, and the upper part is spaced apart from the second side plate 135. In this way, the flame orifice plate 2 is sleeved on the head 13 through the lower part of the first side plate 22, and the distance between the two first side plates 22 on the upper part of the head 13 can be increased, thereby increasing the width and volume of the flow stabilizing cavity 3, which can further improve the mixing and flow stabilization effect of the flow stabilizing cavity 3 on the mixed gas.

[0045] In some embodiments, the fire hole plate 2 is fitted onto the head 13 and then welded onto the second side plate 135 via the first side plate 22.

[0046] like Figure 4As shown, the second top plate 136 and the first top plate 23 are spaced vertically apart to form a flow stabilizing cavity 3 between the head 13 and the flame plate 2. In some embodiments, the height of the flow stabilizing cavity 3 is h, where 3mm ≤ h ≤ 10mm. This arrangement ensures that the flow stabilizing cavity 3 has sufficient height to guarantee its flow stabilizing effect, while also preventing the flow stabilizing cavity 3 from being too high, which would cause the airflow in this area to be too slow and prevent backfire due to excessively slow gas-mixed gas flow velocity.

[0047] The first side plate 22 and the second side plate 135 extend vertically upwards and are arranged parallel to each other. The first side plate 22 is generally made of stainless steel and has a relatively thin wall thickness. The upper part of the first side plate 22 is spaced apart from the second side plate 135, which makes the first side plate 22 prone to concave deformation, thus affecting the flow stabilization effect of the flow stabilizing cavity 3. To avoid this problem, such as Figure 4 As shown, in some embodiments, the first side plate 22 is provided with an abutment portion 24, which abuts against the outer wall surface of the second side plate 135. In this way, the first side plate 22 can be supported on the second side plate 135 through the abutment portion 24, which can effectively prevent the first side plate 22 from deforming and ensure the distance between the first side plate 22 and the second side plate 135, thereby ensuring the flow stabilization effect of the flow stabilization cavity 3, and thus ensuring the uniformity and stability of combustion.

[0048] like Figure 1 and Figure 2 As shown, in some embodiments, the abutment portion 24 includes recesses provided on the first side plate 22 and spaced apart along the length direction of the first side plate 22. The recesses are formed by the partial inward recess of the first side plate 22. The abutment portion 24 has a simple and reliable structure and a good support effect.

[0049] like Figure 4 As shown, in some embodiments, the head 13 includes a uniformly wide channel 137 and a gradually widening channel 138 arranged vertically along the height direction of the burner body. Along the width direction of the burner body, the gradually widening channel 138 is wider at the top and narrower at the bottom. The narrow end of the gradually widening channel 138 is connected to the uniformly wide channel 137. The width of the gradually widening channel 138 gradually increases, that is, the cross-sectional area of ​​the gradually widening channel 138 gradually increases along the flow direction of the gas mixture. This can reduce the disturbance vortex phenomenon caused by the sudden change in the cross-sectional area of ​​the head 13, significantly improve the stability of the gas mixture flow, and thus improve the stability of the flame, thereby improving the combustion effect.

[0050] like Figure 4As shown, in some embodiments, the head 13 includes three equal-width channels 137 and two gradually widening channels 138. The three equal-width channels 137 are spaced vertically, with the lowermost equal-width channel 137 having the smallest width and connecting to the end of the bent portion 12, and the uppermost equal-width channel 137 having the largest width. The two gradually widening channels 138 are spaced vertically, with the lower gradually widening channel 138 connecting the lowermost and middle equal-width channels 137, and the upper gradually widening channel 138 connecting the middle and upper equal-width channels 137.

[0051] like Figure 1 and Figure 2 As shown, the flame port 21 includes multiple main flame ports 211 and multiple auxiliary flame ports 212. The opening area of ​​a single auxiliary flame port 212 is smaller than that of a single main flame port 211. The main flame ports 211 are strip-shaped, and auxiliary flame ports 212 are provided on both sides of the length of each main flame port 211. The main flame ports 211 have a large opening area, resulting in a large flow rate and high velocity of the mixed gas at the main flame ports 211. This makes it easy for flame detachment to occur at the main flame ports 211. In contrast, the auxiliary flame ports 212 have a small area and are located on both sides of the main flame ports 211. The small opening area of ​​the auxiliary flame ports 212 results in a small gas output and a slow flow rate of the mixed gas at the auxiliary flame ports 212. The flame at the auxiliary flame ports 212 can heat the root of the main flame, reducing the flame detachment phenomenon of the main flame and thus improving the stability of the combustion flame at the main flame ports 211.

[0052] like Figure 1 and Figure 2 As shown, in some optional embodiments, the main flame hole 211 is a strip-shaped hole, with its long side extending along the width direction of the fire bar, and multiple main flame holes 211 are arranged at intervals along the length direction of the fire bar. The auxiliary flame hole 212 is a circular hole, with an auxiliary flame hole 212 provided at both ends of each main flame hole 211 along its length direction, which can improve the stability of the flame on both sides of the main flame hole 211.

[0053] In some embodiments, the first top plate 23 is provided with multiple sets of flame holes, each set of flame holes including multiple main flame holes 211 and auxiliary flame holes 212. The multiple main flame holes 211 in each set of flame holes are arranged at equal intervals, and the multiple sets of flame holes are arranged at equal intervals. The main flame holes 211 are located in the middle region of the width direction of the first top plate 23.

[0054] In some embodiments, the orthographic projection of the flame hole 21 on the second top plate 136 is offset from that of the rectifier hole 131, that is, the solid part of the first top plate 23 is directly above the rectifier hole 131. This can prevent the mixed gas flowing out of the rectifier hole 131 from rushing out directly through the flame hole 21, and can make the mixed gas diffuse and stabilize in the flow stabilizing cavity 3 before flowing out from the flame hole 21, which can improve the stability of the flame.

[0055] According to an embodiment of the present invention, another aspect provides a burner including the burner vent from the above embodiment.

[0056] In this burner structure, the spacing between adjacent rectifier holes 131 in the first rectifying zone 132 directly above the bend of the bend 12 is greater than the spacing between adjacent rectifier holes 131 in the second rectifying zone 133. This arrangement increases the resistance of the gas mixture passing through the top wall of the head 13 directly above the bend of the bend 12, reducing the amount of gas entering the flow stabilizing chamber 3 directly above the bend of the bend 12 and decreasing the flow velocity of the gas mixture in that area. The gas mixture then flows from the flow stabilizing chamber 3 to the flame holes 21, effectively reducing the flow rate of the gas mixture rushing directly through the flame holes 21 directly above the bend of the bend 12. Simultaneously, it reduces the airflow velocity in that area, improving the uniformity of gas mixture distribution at the flame holes 21 along the length of the burner. This allows for uniform combustion of the gas mixture at the flame holes 21, improving the uniformity of flame distribution and the stability of gas mixture combustion, thereby reducing burner noise and combustion pollutant emissions.

[0057] According to an embodiment of the present invention, in another aspect, a gas water heater is also provided, including the burner of the above embodiment.

[0058] In this gas water heater structure, the burner plate ensures that the spacing between two adjacent rectifier holes 131 in the first rectifier zone 132 directly above the bend of the bend 12 is greater than the spacing between two adjacent rectifier holes 131 in the second rectifier zone 133. This arrangement increases the resistance of the gas mixture passing through the top wall of the head 13 directly above the bend of the bend 12, reducing the amount of gas entering the flow stabilizing chamber 3 directly above the bend of the bend 12 and decreasing the flow velocity of the gas mixture in that area. The gas mixture then flows from the flow stabilizing chamber 3 to the flame holes 21, effectively reducing the flow rate of the gas mixture rushing directly through the flame holes 21 directly above the bend of the bend 12. Simultaneously, it reduces the airflow velocity in that area, improving the uniformity of the gas mixture distribution at the flame holes 21 along the length of the burner plate. This allows for uniform combustion of the gas mixture at the flame holes 21, improving the uniformity of flame distribution and the stability of gas mixture combustion. Consequently, it reduces combustion noise and emissions of combustion pollutants from the gas water heater.

[0059] 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.

[0060] 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 fire briquette body (1) includes an ejector section (11), a bending section (12), and a head (13) that are sequentially connected along the height direction of the fire briquette body (1). The top wall of the head (13) includes a first rectifying zone (132) and a second rectifying zone (133) arranged side by side along the length direction of the fire briquette body. Both the first rectifying zone (132) and the second rectifying zone (133) are provided with rectifying holes (131). Along the length direction of the fire briquette body (1), the hole spacing between two adjacent rectifying holes (131) in the first rectifying zone (132) is greater than the hole spacing between two adjacent rectifying holes (131) in the second rectifying zone (133). The first rectifying zone (132) is located directly above the bend of the bending section (12). A flame orifice plate (2) is fitted onto the head (13) and forms a flow stabilizing cavity (3) with the head (13); the flame orifice plate (2) is provided with a flame hole (21); the flow rectifier hole (131) is connected to the flame hole (21) through the flow stabilizing cavity (3).

2. The fire grill according to claim 1, characterized in that, Along the length of the firebox body, the length of the head (13) is L, the length of the first rectifying zone (132) is L1, the length of the second rectifying zone (133) is L2, and 0.1 <L1 / L<0.3,0.6<L2 / L<0.8; The total area of ​​all rectifier holes (131) in the first rectifier region (132) is S1, and the total area of ​​all rectifier holes (131) in the second rectifier region (133) is S2, where S1:S2 = 1:(3-6.5).

3. The fire grill according to claim 2, characterized in that, The second rectification region (133) includes a first rectification section (1330), a second rectification section (1331), and a third rectification section (1332). The first rectification section (1330), the second rectification section (1331), and the third rectification section (1332) are arranged side by side in sequence along the direction away from the bend of the bending section (12). The opening area of ​​a single rectification hole (131) on the side of the first rectification section (1330) away from the bend of the bending section (12) is larger than the opening area of ​​a single rectification hole (131) of the second rectification section (1331). The opening area of ​​a single rectification hole (131) of the second rectification section (1331) is larger than the opening area of ​​a single rectification hole (131) of the third rectification section (1332).

4. The fire grill according to claim 3, characterized in that, The opening area of ​​a single rectifier hole (131) on the side of the first rectifier (1330) away from the bend of the bend (12) is equal to the opening area of ​​a single rectifier hole (131) in the first rectifier region (132), and is greater than the opening area of ​​a single rectifier hole (131) on the side of the first rectifier (1330) near the bend of the bend (12).

5. The fire grill according to claim 4, characterized in that, The rectifying hole (131) is a strip-shaped hole, and the rectifying hole (131) extends along the width direction of the fire duct body. The plurality of rectifying holes (131) are arranged at intervals along the length direction of the fire duct body.

6. The fire grill according to claim 5, characterized in that, The rectifier holes (131) of the first rectifier (1330), the second rectifier (1331) and the third rectifier (1332) are arranged at equal intervals.

7. The fire grill according to claim 3, characterized in that, The length of the first rectifier section (1330) is L3, the length of the second rectifier section (1331) is L4, and the length of the third rectifier section (1332) is L5. Therefore, 0.3 <L3 / L2<0.45,0.2<L4 / L2<0.55,0.15<L5 / L2<0.35。 8. The fire rack according to any one of claims 1-7, characterized in that, The flame hole plate (2) includes two first side plates (22) arranged opposite to each other and a first top plate (23) on top of the first side plates (22). The head (13) includes two second side plates (135) arranged opposite to each other and a second top plate (136) on top of the second side plates (135). The lower part of the first side plate (22) abuts against the second side plate (135), and the upper part of the first side plate (22) is spaced apart from the second side plate (135). The rectifier hole (131) is provided on the second top plate (136), and the flame hole (21) is provided on the first top plate (23).

9. The fire grill according to claim 8, characterized in that, The first side plate (22) is provided with an abutment part (24), which abuts against the outer wall surface of the second side plate (135).

10. The fire rack according to any one of claims 1-7, characterized in that, The head (13) includes equal-width channels (137) and gradually widening channels (138) arranged vertically along the height direction of the fire briquette body. Along the width direction of the fire briquette body, the gradually widening channel (138) is wider at the top and narrower at the bottom, and the narrow end of the gradually widening channel (138) is connected to the equal-width channel (137). And / or, the flame hole (21) includes a plurality of main flame holes (211) and a plurality of auxiliary flame holes (212), the opening area of ​​a single auxiliary flame hole (212) is smaller than the opening area of ​​a single main flame hole (211), the main flame hole (211) is strip-shaped, and the auxiliary flame hole (212) is provided on both sides of the length direction of each main flame hole (211).

11. A burner, characterized in that, The fire rack includes any one of claims 1 to 10.

12. A gas-fired water heater, characterized in that, Includes the burner as described in claim 11.

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