Fire grate and gas equipment

Abstract

The utility model discloses a fire grate and gas equipment, and relates to the technical field of gas equipment. Wherein the fire grate comprises a shell, a combustion cover and a rectifying plate, and an airflow channel is formed in the shell; the combustion cover is arranged at the top of the shell and is provided with a plurality of fire holes communicated with the airflow channel; the rectifying plates are arranged in the airflow channel and are arranged below the combustion cover at intervals; air passing holes are formed in the rectifying plate; the distance h between the rectifying plate and the plate body, provided with the fire holes, of the combustion cover is larger than or equal to 1 mm. According to the technical scheme, the overall flame height can be reduced, flame lifting and leaving are avoided, combustion is more sufficient, and emission of nitric oxide is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas equipment, in particular to a burner row and a gas equipment. Background Art

[0002] The burner is the core component of the gas equipment.

[0003] In the related art, the burner hole structure of the burner usually adopts a single-strip burner hole structure. Due to the small burner hole area, the combustion intensity of the burner hole is high, and the flue gas performance discharged by the instantaneous combustion is not good, resulting in a high nitrogen oxide content. For this reason, the flame intensity is often reduced by increasing the burner hole area. However, this is likely to cause the gas flow velocity of the burner row to be too fast, resulting in the problems of flame detachment and flame lift. Summary of the Utility Model

[0004] The main purpose of the utility model is to propose a burner row, aiming to solve the problems of flame detachment and flame lift of the burner row and reduce the emission of nitrogen oxides.

[0005] To achieve the above object, the burner row proposed by the utility model includes:

[0006] A housing, in which an air flow channel is formed;

[0007] A combustion cover, which is arranged on the top of the housing and is provided with a plurality of burner holes communicated with the air flow channel; and

[0008] A rectifying plate, which is arranged in the air flow channel and is spaced below the combustion cover; the rectifying plate extends from one end to the other end in the length direction of the housing, and the rectifying plate is provided with air passing holes; the distance h between the rectifying plate and the plate body of the combustion cover where the burner holes are arranged satisfies: h≥1mm. The distance h is set to satisfy h≥1mm so that there is enough space between the rectifying plate and the combustion cover for the air flow to mix and diffuse smoothly between the rectifying plate and the combustion cover, further improving the air flow distribution uniformity.

[0009] In an embodiment of the present application, in the length direction of the rectifying plate, the rectifying plate has a first region and second regions respectively arranged at both ends of the first region. The first region is provided with a plurality of first air passing holes, and the unit air passing area of the second region is smaller than the unit air passing area of the first region. Therefore, the resistance of the second region to the air flow can be increased, the air flow velocity at the burner holes at both ends can be reduced, and the occurrence of flame detachment and flame lift at the burner holes at both ends can be avoided.

[0010] In an embodiment of the present application, the air passing area of the second region is 0. Such a design can further increase the resistance of the second region to the air flow, reduce the air flow velocity at the burner holes at both ends, and avoid the occurrence of flame detachment and flame lift at the burner holes at both ends.

[0011] In an embodiment of the present application, the second region is an opening region; the unit opening area of the second region is smaller than the unit opening area of the first region. Such a design enables the second region to pass gas, while having a relatively large resistance to the airflow, reducing the airflow velocity at the two end flame holes, and avoiding flashback and flame detachment at the two end flame holes.

[0012] In an embodiment of the present application, a plurality of second gas passing holes are provided in the second region, and the plurality of second gas passing holes are spaced apart along the length direction of the rectifying plate;

[0013] Wherein, the distance between two adjacent second gas passing holes gradually increases from the side close to the first region to the side far from the first region; or, the opening areas of the plurality of second gas passing holes gradually decrease from the side close to the first region to the side far from the first region. Such a design enables the second region to pass gas, while having a relatively large resistance to the airflow, reducing the airflow velocity at the two end flame holes, and avoiding flashback and flame detachment at the two end flame holes.

[0014] In an embodiment of the present application, the length of the second region is defined as L2, and the length of the rectifying plate is defined as L, satisfying: Such a design can not only reduce the airflow velocity at the two end flame holes, but also ensure sufficient gas output.

[0015] In an embodiment of the present application, the plurality of first gas passing holes include a plurality of first sub-gas passing holes and a plurality of second sub-gas passing holes, the opening areas of the first sub-gas passing holes are different from the opening areas of the second sub-gas passing holes, and the plurality of first sub-gas passing holes and the plurality of second sub-gas passing holes are alternately arranged at intervals along the length direction of the rectifying plate. Such a design enables the airflow to be fully dispersed when passing through the rectifying plate, and further enables the airflow distribution between the rectifying plate and the burner cover to be more uniform. In this way, the airflow distribution is more uniform when flowing out from the flame holes, playing a role in stabilizing the flame.

[0016] In an embodiment of the present application, there are two first sub-gas passing holes between every two adjacent second sub-gas passing holes, and the two first sub-gas passing holes are spaced apart in the width direction of the rectifying plate; the second sub-gas passing hole is located at the middle position in the width direction of the rectifying plate, and the edge of the second sub-gas passing hole protrudes towards the interval between the corresponding two first sub-gas passing holes. Such a design can play a role in further shunting and dispersing the air and gas mixture; at the same time, it can ensure the overall structural strength while increasing the gas passing area.

[0017] In an embodiment of the present application, the burner row further includes a metal mesh provided below the burner cover, and the metal mesh covers the plurality of flame holes. Such a design can increase the total combustion flame hole area, and at the same time reduce the combustion heat intensity per unit flame hole, which is beneficial to reducing the generation of nitrogen oxides.

[0018] In an embodiment of the present application, the combustion cover includes a top plate and two side plates connected to both width sides of the top plate. The two side plates are inserted into the gas passage, and the top plate is provided with a plurality of fire holes, and the plurality of fire holes are arranged at intervals along the length direction of the top plate. Such a design can make the air output from the plurality of fire holes uniform, and at the same time facilitate the assembly of the combustion cover and the housing.

[0019] In an embodiment of the present application, side plates are respectively provided on both sides in the width direction of the rectifying plate, and the side plates are inserted into the combustion cover. Such a design improves the structural strength of the rectifying plate, and at the same time can simplify the assembly structure and improve the installation efficiency.

[0020] To achieve the above object, the present application further provides a gas appliance, including the above-mentioned burner assembly.

[0021] In the burner assembly of the technical solution of the present utility model, an air flow passage is formed in the housing, and a combustion cover having a plurality of fire holes is provided at the top of the housing, so that air flow can be ejected from the plurality of fire holes for combustion. A rectifying plate is provided below the combustion cover, and the distance h between the rectifying plate and the plate body of the combustion cover where the fire holes are provided satisfies: h≥1 mm, so that a sufficient mixing chamber is formed between the rectifying plate and the combustion cover, enabling the air flow to mix and diffuse smoothly between the rectifying plate and the combustion cover, improving the air flow distribution uniformity and at the same time being able to reduce the flow rate, achieving the purpose of uniform flame, reducing the flame height, and burning sufficiently to reduce the generation of nitrogen oxides. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0023] Figure 1 Schematic structural diagram of an embodiment of the burner assembly of the present utility model;

[0024] Figure 2 Exploded structural diagram of an embodiment of the burner assembly of the present utility model;

[0025] Figure 3 Schematic diagram of air flow diffusion in an embodiment of the burner assembly of the present utility model;

[0026] Figure 4 Schematic structural diagram of an embodiment in which the second region of the rectifying plate in the present utility model is a closed region;

[0027] Figure 5This is a schematic structural diagram of an embodiment in which the second region of the rectifying plate in the present utility model is an opening region.

[0028] Explanation of the reference numerals in the attached drawings:

[0029] Label Name Label Name 1 Housing 3 Rectifying plate 101 Air outlet 3a First region 102 Air inlet 3b Second region 2 Combustion cover 301 First through-hole 201 Flame hole 301a First sub-through-hole 21 Top plate 301b Second sub-through-hole 22 Side plate 302 Second through-hole 4 Metal mesh 31 Side panel

[0030] The realization of the purpose, functional characteristics and advantages of the present utility model will be further described with reference to the embodiments and the attached drawings. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the attached drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0032] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0033] At the same time, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where A and B are satisfied simultaneously.

[0034] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0035] In the related art, the flame hole structure of a burner usually adopts a single-strip flame hole structure. Due to the small flame hole area and high flame hole intensity of this single-strip flame hole structure, the flue gas performance discharged by instantaneous combustion is not good, resulting in a relatively high nitrogen oxide content. Therefore, the unit heat intensity of the flame hole is often reduced by increasing the flame hole area and the flame intensity is reduced. However, after increasing the flame hole area, it is easy to cause the gas flow velocity of the burner to be too fast, and it is easy to have flame detachment and lift-off during combustion, resulting in incomplete combustion, excessive flue gas, and low gas utilization rate.

[0036] Based on this, the present utility model provides a burner, aiming to reduce the gas flow velocity by arranging a flow rectifying plate 3 at intervals below the flame holes of the burner, so as to form a mixing chamber between the flow rectifying plate 3 and the combustion cover 2, achieve uniform flame, reduce the flame height, and achieve the purpose of complete combustion and reduction of nitrogen oxide generation.

[0037] In an embodiment of the present utility model, as Figures 1 to 3 shown, the burner includes a housing 1, a combustion cover 2, and a flow rectifying plate 3.

[0038] An air flow channel is formed inside the housing 1; the combustion cover 2 is arranged on the top of the housing 1 and is provided with a plurality of flame holes 201 communicating with the air flow channel; the flow rectifying plate 3 is arranged inside the air flow channel and is spaced below the combustion cover 2; the flow rectifying plate 3 extends from one end of the housing 1 in the length direction to the other end in the length direction, the flow rectifying plate 3 is provided with air passing holes (301 / 302), and the distance h between the upper surface of the flow rectifying plate 3 and the plate surface of the combustion cover 2 where the flame holes 201 are arranged satisfies: h≥1mm.

[0039] The burner is used on a burner. The air inlet 102 of the air flow channel inside the housing 1 is connected to an air flow source. The air flow source includes air and gas. The gas and air enter the air flow channel from the air inlet 102, are pre-mixed inside the air flow channel, and then flow to the air outlet 101, are ejected through the plurality of flame holes 201 of the combustion cover 2 and are ignited to form a combustion flame. Optionally, the plurality of flame holes 201 may have the same or different areas and the same or different shapes. The shape of the flame holes 201 may be determined according to actual conditions, for example, it may be circular, triangular, square, rectangular, or some other irregular shapes, etc.

[0040] The flow rectifying plate 3 is arranged at intervals below the combustion cover 2, so that the air flow first passes through the flow rectifying plate 3 and then enters the flame holes 201 of the combustion cover 2. It can be understood that a mixing chamber is formed between the flow rectifying plate 3 and the combustion cover 2, and the air flow can be pre-mixed in the mixing chamber after passing through the flow rectifying plate 3, reducing the flow velocity, so as to reduce the velocity flowing out of the flame holes 201 and avoid flame detachment and lift-off.

[0041] In practical applications, the distance h between the rectifying plate 3 and the combustion cover 2 should not be too small. If it is too small, some of the flame holes 201 of the combustion cover 2 are easily blocked by the rectifying plate 3 and cannot emit gas. Therefore, in this embodiment, the distance h between the upper surface of the rectifying plate 3 and the plate surface of the combustion cover 2 where the flame holes 201 are provided is set to satisfy h≥1 mm, so as to have sufficient space between the rectifying plate 3 and the combustion cover 2, allowing the air flow to smoothly mix and diffuse between the rectifying plate 3 and the combustion cover 2, further improving the uniformity of the air flow distribution, making the gas emission from the multiple flame holes 201 on the combustion cover 2 more uniform, and thus achieving a better flame stabilization effect.

[0042] In summary, in the burner row of the technical solution of the present utility model, an air flow channel is formed in the housing 1, and a combustion cover 2 with multiple flame holes 201 is provided at the top of the housing 1, so that the air flow can be ejected from the multiple flame holes 201 for combustion. A rectifying plate 3 is provided below the combustion cover 2, and the distance h between the rectifying plate 3 and the plate body of the combustion cover 2 where the flame holes 201 are provided satisfies: h≥1 mm, so as to form a sufficient mixing chamber between the rectifying plate 3 and the combustion cover 2, allowing the air flow to smoothly mix and diffuse between the rectifying plate 3 and the combustion cover 2, improving the uniformity of the air flow distribution and at the same time reducing the flow rate, achieving the purpose of uniform flame, reducing the flame height, and burning sufficiently to reduce the generation of nitrogen oxides.

[0043] In an embodiment of the present application, as Figures 2 to 5 , in the length direction of the rectifying plate 3, the rectifying plate 3 has a first region 3a and second regions 3b respectively provided at both ends of the first region 3a. The first region 3a is provided with multiple first air passing holes 301, and the unit air passing area of the second region 3b is smaller than the unit air passing area of the first region 3a.

[0044] The rectifying plate 3 has a first region 3a and two second regions 3b in the length direction. The two second regions 3b are respectively provided on both sides of the first region 3a, so that the two second regions 3b correspond to the flame holes 201 at both ends in the length direction of the combustion cover 2, and the first region 3a corresponds to the flame holes 201 in the middle region in the length direction of the combustion cover 2. It can be understood that when the gas flows towards the air outlet 101, the rectifying plate 3 can generate resistance to the air flow and play a role in reducing the air flow velocity. By setting the unit air passing area of the second region 3b to be smaller than the unit air passing area of the first region 3a, the resistance of the second region 3b to the air flow can be increased, the air flow velocity at the two end flame holes 201 can be reduced, the occurrence of flame detachment and flame lift at the two end flame holes 201 can be avoided, the purpose of reducing the overall flame height can be achieved, the combustion can be more sufficient, and the emission of nitrogen oxides can be reduced.

[0045] The unit gas passage area of the second region 3b is smaller than that of the first region 3a. It can be understood that the gas passage area of the second region 3b can be 0. At this time, the second region 3b is a closed region without openings. The air flow can flow into the space between the flow rectifying plate 3 and the combustion cover 2 from the first gas passage holes 301 in the first region 3a and diffuse towards both ends, so that multiple flame holes 201 on the combustion cover 2 can all emit gas for combustion. Or, the second region 3b can be an opening region. At this time, the unit opening area of the second region 3b is smaller than the unit opening area of the first region 3a, ensuring that the flow rectifying plate 3 has sufficient resistance to the air flow at both ends to reduce the air flow velocity at both ends.

[0046] In addition, based on the foregoing embodiments, the distance h between the upper surface of the flow rectifying plate 3 and the plate surface of the combustion cover 2 where the flame holes 201 are provided is set to satisfy h≥1 mm, so that there is sufficient space between the flow rectifying plate 3 and the combustion cover 2, and the air flow can smoothly diffuse from the first region 3a to the second regions 3b on both sides. Then, even if the second region 3b is a closed region, it can be ensured that gas is ejected from the flame holes 201 at both ends for combustion.

[0047] Furthermore, the specific gas passage distribution mode on the second region 3b of the flow rectifying plate 3 can be determined according to the actual situation:

[0048] In one embodiment, as Figure 4 , the gas passage area of the second region 3b is 0. At this time, the second region 3b is a closed region. The air flow only passes through multiple first gas passage holes 301 in the first region 3a, and after entering the space between the flow rectifying plate 3 and the combustion cover 2, it can diffuse towards both ends, so that multiple flame holes 201 on the entire combustion cover 2 can all emit gas for combustion.

[0049] In one embodiment, as Figure 5 , the second region 3b is an opening region; the unit opening area of the second region 3b is smaller than the unit opening area of the first region 3a. At this time, the air flow can pass through multiple first gas passage holes 301 in the first region 3a and multiple second gas passage holes 302 in the second region 3b at the same time. By making the unit opening area of the second region 3b smaller than the unit opening area of the first region 3a, the flow rectifying plate 3 has sufficient resistance to the air flow at both ends, and the air flow velocity at both ends can be reduced. Specifically, multiple second gas passage holes 302 are spaced apart along the length direction of the flow rectifying plate 3 to play a role in dispersing and uniforming the air flow.

[0050] In the embodiment with the opening here, by setting the distribution of multiple second air holes 302 or the layout of the opening areas, the effect of better uniform flame can be achieved. As an example, the distance between two adjacent second air holes 302 can be gradually increased from near the first area 3a to far from the first area 3a. With such a setting, the resistance of the part far from the first area 3a can be greater than that of the part near the first area 3a. Then, the air volume at both ends of the flow rectifying plate 3 will be less than that at the middle position. At the same time, the airflow entering from the first air hole 301 will also spread to both ends, making the airflow distribution between the flow rectifying plate 3 and the combustion cover 2 more uniform, so that it can be ejected more uniformly from multiple fire holes 201, making the flame combustion more stable. Or, as an example, the opening areas of multiple second air holes 302 can be gradually decreased from near the first area 3a to far from the first area 3a. With such a setting, the resistance of the part far from the first area 3a can be greater than that of the part near the first area 3a. Then, the air volume at both ends of the flow rectifying plate 3 will be less than that at the middle position. At the same time, the airflow entering from the first air hole 301 will also spread to both ends, making the airflow distribution between the flow rectifying plate 3 and the combustion cover 2 more uniform, so that it can be ejected more uniformly from multiple fire holes 201, making the flame combustion more stable.

[0051] Optionally, the shape structure of the second air hole 302 can be determined according to the actual situation. For example, it can be circular, triangular, square, rectangular, strip-shaped or some other irregular shapes, etc. The shape of the second air hole 302 can be the same as or different from the shape of the first air hole 301.

[0052] In an embodiment of the present application, as Figure 4 and Figure 5 , multiple first air holes 301 include multiple first sub-air holes 301a and multiple second sub-air holes 301b. The opening areas of the first sub-air holes 301a are different from those of the second sub-air holes 301b, and the multiple first sub-air holes 301a and the multiple second sub-air holes 301b are arranged at intervals and alternately along the length direction of the flow rectifying plate 3.

[0053] By setting multiple first air holes 301 as first sub-air holes 301a with different opening areas and multiple second sub-air holes 301b, the air and gas mixture in the air flow channel can flow from the multiple first sub-air holes 301a and the multiple second sub-air holes 301b with different opening areas to the upper space of the flow rectifying plate 3. And because the multiple first sub-air holes 301a and the multiple second sub-air holes 301b are arranged at intervals and alternately, the airflow can be dispersed when passing through the flow rectifying plate 3, and then the airflow distribution between the flow rectifying plate 3 and the combustion cover 2 becomes more uniform. In this way, the airflow is more uniformly distributed when flowing out from the fire hole 201, playing a role in stabilizing the flame.

[0054] It is understandable that the shapes of the first and second sub-holes 301a, 301b can be determined according to actual conditions, such as strip holes, square holes, elliptical holes or holes of other shapes. The shapes of the first and second sub-holes 301a, 301b can be the same or different.

[0055] Furthermore, there are two first sub-air holes 301a between each two adjacent second sub-air holes 301b, and the two first sub-air holes 301a are arranged at intervals in the width direction of the rectifier plate 3; the second sub-air hole 301b is located in the middle position in the width direction of the rectifier plate 3, and the hole edge of the second sub-air hole 301b protrudes toward the interval between the corresponding two first sub-air holes 301a.

[0056] In this embodiment, there are two first sub-air holes 301a spaced apart in the width direction between each two adjacent second sub-air holes 301b, and such arrangement can further divert and disperse the air and fuel gas mixture. It can be understood that there is a gap between the two first sub-air holes 301a, which can divert the gas on the one hand and enhance the structural strength of the rectifier plate 3 on the other hand.

[0057] The second sub-air holes 301b are located in the middle of the width direction of the rectifier plate 3, and can be staggered with the air passing areas of the two first sub-air holes 301a, so as to further break up the uniform airflow. Furthermore, the hole edge of the second sub-air hole 301b protrudes toward the interval between the corresponding two first sub-air holes 301a, which can increase the air passing area of the second sub-air hole 301b on the one hand, and avoid affecting the area size of the first sub-air hole 301a on the other hand compared with the solution of protruding toward the first sub-air hole 301a. Therefore, such a design can ensure the overall structural strength while increasing the air passing area.

[0058] In one embodiment of the present application, Figure 4 and Figure 5 , define the length of the second region 3b as L2, and the length of the rectifier plate 3 as L, satisfying:

[0059] It can be understood that the two second regions 3b are respectively arranged at both ends of the rectifying plate 3 in the length direction. The second region 3b serves to reduce the air flow velocity at the flame holes 201 at both ends of the burner. The first region 3a is located between the two second regions 3b, and sufficient air flow needs to pass through the first region 3a. In actual application, the length of the second region 3b should not be too short or too long. If it is too short, it cannot reduce the air flow velocity at the flame holes 201 at both ends. If it is too long, it is likely to cause excessive air flow resistance and insufficient air output. Based on this, in this embodiment, the relationship between the length L2 of the second region 3b and the length L of the rectifying plate 3 is set to satisfy so as to both reduce the air flow velocity at the flame holes 201 at both ends and ensure sufficient air output. Taking the length L1 of the first region 3a as an example, it satisfies:

[0060] To achieve a better effect of uniform flame, preferably, the length L2 of the second region 3b is of the length L of the rectifying plate 3.

[0061] In an embodiment of the present application, as Figures 1 to 3 , the burner further includes a metal mesh 4 disposed below the combustion cover 2, and the metal mesh 4 covers a plurality of flame holes 201.

[0062] In this embodiment, by placing the metal mesh 4 below the combustion cover 2, the temperature of the metal mesh 4 during combustion can be reduced, avoiding high-temperature redness, and improving the service life of the metal mesh 4. Each mesh hole is a tiny flame hole, and a plurality of flame holes 201 are covered, greatly increasing the total combustion flame hole area, and at the same time reducing the combustion heat intensity per unit flame hole, which is beneficial to reducing the generation of nitrogen oxides.

[0063] To further improve the flame uniformity, the number of layers of the metal mesh 4 can be multiple layers. The multiple layers of the metal mesh 4 can further disperse air and gas, enabling the gas and air to be mixed evenly. At the same time, the multiple layers of the metal mesh 4 can increase the resistance and achieve a better anti-backfire effect. In actual application, the number of layers of the metal mesh 4 is related to the mesh number of the metal mesh 12. The metal mesh 4 with a larger mesh number has fewer corresponding layers, and the one with a smaller mesh number has more corresponding layers. For example, the number of layers of the metal mesh 4 can be 2 to 10 layers, specifically 2 layers, 3 layers, 4 layers, 5 layers, 6 layers, 7 layers, 8 layers, 9 layers or 10 layers. The mesh number of the metal mesh 4 can be from 20 to 100 meshes, specifically 20 meshes, 40 meshes, 50 meshes, 60 meshes, 80 meshes or 100 meshes, etc.

[0064] Considering that too many layers may lead to insufficient air flow supply and the high price of metal meshes with a large mesh number, as an example, the metal mesh 4 can adopt a combination of 2 to 5 layers of mesh and 20 to 50 meshes.

[0065] In an embodiment of the present application, asFigures 1 to 3 The combustion cover 2 includes a top plate 21 and two side plates 22 connected to the two width sides of the top plate 21. The two side plates 22 are inserted into the gas passage. The top plate 21 is provided with a plurality of fire holes 201, and the plurality of fire holes 201 are arranged at intervals along the length direction of the top plate 21.

[0066] In this embodiment, the structure of the combustion cover 2 is illustrated by way of example. The two side plates 22 and the top plate 21 generally form a "∩" - shaped structure. The top plate 21 is arranged at the top of the housing 1. The two side plates 22 are inserted into the gas passage and are respectively welded and fixed to the two side wall surfaces of the housing 1. The two side plates 22 can be an integrally formed structure or a split structure with the top plate 21. For the convenience of production and manufacturing, the combustion cover 2 is preferably an integrally formed sheet metal part, and the two side plates 22 are respectively formed by bending and extending from the two width sides of the top plate 21.

[0067] The plurality of fire holes 201 are arranged at intervals along the length direction of the top plate 21, which plays a role in evenly discharging gas, making the flame combustion more stable. Correspondingly, the metal mesh 4 is arranged below the top plate 21, and the two can be fixed by welding.

[0068] In an embodiment of the present application, as Figures 1 to 3 , side plates 31 are respectively provided on the two sides in the width direction of the rectifying plate 3, and the side plates 31 are inserted into the combustion cover 2.

[0069] It can be understood that the two side plates 31 play a role in installing and fixing the rectifying plate 3 and increasing the structural strength of the rectifying plate 3. Optionally, the two side plates 31 can be fixedly connected to the housing 1, or can be fixedly connected to the combustion cover 2. In this embodiment, considering the installation convenience, the side plates 31 are fixedly connected to the combustion cover 2. During assembly, the rectifying plate 3 can be first installed in the combustion cover 2, and then the whole is inserted into the housing 1, which simplifies the assembly structure and improves the installation efficiency.

[0070] Optionally, the side plates 31 are welded and fixed to the side plates 22 of the combustion cover 2.

[0071] Optionally, the side plates 31 and the rectifying plate 3 are of an integrally formed sheet metal part structure, and the two side plates 31 can be formed by bending the two side edges of the rectifying plate 3.

[0072] The present utility model also proposes a gas - using device, which includes a burner. The specific structure of the burner refers to the above - mentioned embodiment. Since this gas - using device adopts all the technical solutions of the above - mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above - mentioned embodiments, and will not be elaborated herein one by one.

[0073] Exemplarily, the gas - using device can be a burner, such as an atmospheric burner, a rich - lean burner or a water - cooled burner and other forms of burners.

[0074] Exemplarily, the gas equipment may also be equipment such as a gas water heater, a boiler, etc.

[0075] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A burner, characterized in that, Comprising: A housing, within which an air flow channel is formed; A combustion cover, provided at the top of the housing and provided with a plurality of fire holes communicating with the air flow channel; And A rectifying plate, provided within the air flow channel and spaced below the combustion cover; the rectifying plate extends from one end to the other end in the length direction of the housing, and the rectifying plate is provided with air passing holes; the distance h between the rectifying plate and the plate body of the combustion cover where the fire holes are provided satisfies: h ≥ 1 mm.

2. The burner row according to claim 1, wherein, In the length direction of the rectifying plate, the rectifying plate has a first region and second regions respectively provided at both ends of the first region. The first region is provided with a plurality of first air passing holes, and the unit air passing area of the second region is smaller than the unit air passing area of the first region.

3. The burner row according to claim 2, characterized in that, The air passing area of the second region is 0.

4. The burner row according to claim 2, characterized in that, The second region is an opening region; the unit opening area of the second region is smaller than the unit opening area of the first region.

5. The burner row according to claim 4, characterized in that, The second region is provided with a plurality of second air passing holes, and the plurality of second air passing holes are spaced apart along the length direction of the rectifying plate; Wherein, the distance between two adjacent second air passing holes gradually increases from being close to the first region to being far from the first region; or, the opening areas of the plurality of second air passing holes gradually decrease from being close to the first region to being far from the first region.

6. The burner row according to any one of claims 2 to 5, characterized in that Define the length of the second region as L2, and the length of the rectifying plate as L, satisfying:

7. The burner row according to any one of claims 2 to 5, characterized in that The plurality of first air passing holes include a plurality of first sub-air passing holes and a plurality of second sub-air passing holes. The opening areas of the first sub-air passing holes are different from those of the second sub-air passing holes, and the plurality of first sub-air passing holes and the plurality of second sub-air passing holes are alternately arranged at intervals along the length direction of the rectifying plate.

8. The burner row according to claim 7, characterized in that, There are two first sub-air passing holes between every two adjacent second sub-air passing holes, and the two first sub-air passing holes are spaced apart in the width direction of the rectifying plate; The second sub-air passing holes are located at the middle position in the width direction of the rectifying plate, and the hole edges of the second sub-air passing holes protrude towards the interval between the corresponding two first sub-air passing holes.

9. The burner row according to any one of claims 1 to 5, characterized in that, The burner also includes a metal mesh provided below the combustion cover, and the metal mesh covers the plurality of fire holes.

10. The burner row according to any one of claims 1 to 5, characterized in that, The combustion cover includes a top plate and two side plates connected to both width sides of the top plate. The two side plates are inserted into the gas channel, and the top plate is provided with a plurality of the fire holes, and the plurality of fire holes are spaced apart along the length direction of the top plate.

11. The burner row according to claim 10, wherein, Side plates are respectively provided on both sides in the width direction of the rectifying plate, and the side plates are inserted into the combustion cover.

12. A gas device, characterized in that, Comprising the burner according to any one of claims 1 to 11.

Images