Combustor and water heater

Abstract

The utility model discloses a combustor and a water heater, and relates to the technical field of water heater equipment, the combustor comprises a bottom shell and a cover body, the cover body is arranged on the bottom shell in a covering mode, and a combustion cavity is defined by the cover body and the bottom shell; the cover body is provided with a connecting hole used for being installed with the bottom shell in a matched mode, and the cover body is provided with a first reinforcing part on the periphery of the connecting hole. According to the technical scheme, the first reinforcing part is arranged on the periphery of the connecting hole, the structural strength of the cover body at the connecting hole can be effectively enhanced, especially in a high-temperature and high-pressure environment, a combustor needs to bear large stress, the first reinforcing part can prevent the connecting part from being deformed or damaged, and the service life of equipment is prolonged.

Description

Technical Field

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

[0002] In the related prior art, the cover of the combustion chamber of the gas water heater is large in size and needs to be provided with multiple holes, resulting in insufficient structural strength and possible deformation and damage problems. Utility Model Content

[0003] The main purpose of the utility model is to provide a burner and a water heater, aiming to improve the structural strength of the cover of the burner.

[0004] To achieve the above purpose, the burner proposed by the utility model includes:

[0005] Bottom shell, and

[0006] A cover body, which is disposed on the bottom shell and encloses the bottom shell to form a combustion chamber;

[0007] The cover body is provided with a connection hole for fitting and mounting with the bottom shell, and the cover body is provided with a first reinforcement portion at the periphery of the connection hole.

[0008] In one embodiment, the cover has a first side and a second side opposite to each other, and a portion of the cover protrudes from the first side toward the second side to form the first reinforcement portion.

[0009] In one embodiment, the first side is an inner side and the second side is an outer side.

[0010] In one embodiment, the first reinforcement portion is a raised portion.

[0011] In one embodiment, the first reinforcement portion is arranged in a semicircular ring shape.

[0012] In one embodiment, a folding portion is provided at the edge of the cover body, the folding portion covers the bottom shell, and the first reinforcing portion is provided on a side of the connecting hole away from the edge of the cover body.

[0013] In one embodiment, a fire viewing hole is further provided on the cover body, and a second reinforcement portion is provided around the periphery of the fire viewing hole, and the second reinforcement portion is located on a side of the cover body away from the bottom shell.

[0014] In one embodiment, the fire viewing hole is arranged in an elliptical shape.

[0015] The utility model also provides a water heater, which comprises:

[0016] Housing; and

[0017] The burner as described in any one of the foregoing embodiments is disposed within the outer casing.

[0018] In one embodiment, the outer casing has a front panel; the bottom case is formed with a mounting groove and a disassembly opening communicating with the mounting groove, the disassembly opening is oriented towards the front panel, and the cover body is disposed to cover the disassembly opening; the water heater includes a heat exchanger which is mounted from the disassembly opening into the mounting groove.

[0019] The technical solution of the present utility model effectively enhances the structural strength of the cover body at the connection hole position by providing a first strengthening portion at the periphery of the connection hole. Especially in a high-temperature and high-pressure environment where the burner needs to withstand relatively large stresses, the first strengthening portion can prevent deformation or damage at the connection part and extend the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or in 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.

[0021] Figure 1 FIG. 1 is a schematic structural diagram of an embodiment of a water heater provided by the present utility model;

[0022] Figure 2 FIG. Figure 1 is a partial exploded view of

[0023] Figure 3 FIG. Figure 2 is a partial enlarged view of

[0024] Figure 4 FIG. Figure 3 is an enlarged view of portion A in

[0025] Figure 5 FIG. Figure 1 is a schematic structural diagram of the cover body in

[0026] Figure 6 FIG. Figure 5 is an enlarged view of portion B in

[0027] Figure 7 FIG. Figure 1 is a front view after hiding the cover body in

[0028] Reference Numerals in the Drawings:

[0029] 1. Water heater;

[0030] 10. Inner shell; 100. Bottom shell; 101. Installation groove; 101a. Accommodation groove; 101b. Guide groove; 102. Disassembly and assembly opening; 103. Opening; 110. Bottom plate; 120. Installation bracket; 121. Side plate; 122. Connecting piece; 122a. First installation hole; 200. Cover body; 201. Connection hole; 202. Fire viewing hole; 210. First strengthening part; 220. Second strengthening part; 230. Third strengthening part;

[0031] 20. Heat exchanger; 21. Heat exchange main body; 22. End plate; 22a. End plate body; 22b. Flange; 22c. Second installation hole; 30. Sealing part; 40. Limit component; 41. Limit plate; 41a. Limit plate body; 41b. First bending part; 41c. Second bending part; 42. Limit convex part; 50. Condensation heat exchanger.

[0032] The realization of the purpose, functional features and advantages of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0034] 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 positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. 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 such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the 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 protection scope required by the present utility model.

[0036] The present utility model provides a water heater, which generally refers to a gas water heater, aiming to improve the structural strength of the cover of the burner. For the convenience of understanding and description, in the attached drawings of the present utility model Figures 1 to 7 The space, groove or hole is indicated by a solid arrow.

[0037] Please refer to Figures 1 to 3 , in an embodiment of the present utility model, the water heater 1 includes a housing and an inner shell 10. The specific structure of the water heater 1 will be described below.

[0038] Among them, the main function of the housing is to provide structural support and firmly hold the internal components of the gas water heater 1 together. Generally speaking, the housing includes a detachable back shell and a face cover, and an installation cavity is formed between the back shell and the face cover. Exemplarily, the back shell usually includes a back plate and first mounting plates provided at the upper and lower ends of the back plate. The mounting plates are bent and connected to the back plate. The face cover usually includes a front panel and second mounting plates provided on the left and right sides of the front panel. In this embodiment, the front panel is disposed opposite to the back plate, and the front panel is usually equipped with a temperature adjustment button or knob, and the user can set the required water temperature by adjustment. Alternatively, the electronic front panel is usually equipped with a liquid crystal display or touch buttons, etc. The first mounting plates are provided at the upper and lower ends of the back plate, which can better disperse and bear the weight of the internal components, reducing the deformation or damage of the bottom shell 100; in addition, the first mounting plates can be used as mounting points to facilitate the fixing and installation of the internal components of the water heater 1, such as the burner, the heat exchanger 20 or the condensation heat exchanger 50, etc. Of course, in some embodiments, the back shell may only include a back plate, or the bottom shell 100 includes one of the back plate, the upper first mounting plate and the lower first mounting plate. It should be understood that the above up, down, left and right are determined after the water heater 1 is installed on a building such as a wall.

[0039] The inner shell 10 is disposed inside the housing. The inner shell 10 mainly encloses a combustion area and isolates the combustion area from other components of the water heater 1 to prevent heat leakage, reduce the influence of high temperature on other components and the housing during the operation of the water heater 1, and avoid the overall temperature of the device from being too high, thereby improving the service life.

[0040] In this embodiment, the water heater 1 includes a heat exchanger 20. Among them, the inner shell 10 includes a bottom shell 100 and a cover body 200. The bottom shell 100 and the cover body 200 enclose to form the combustion area (combustion chamber). The bottom shell 100 is formed with an installation groove 101 and a disassembly and assembly opening 102 communicating with the installation groove 101. The disassembly and assembly opening 102 faces the panel. The cover body 200 is covered on the disassembly and assembly opening 102, and the heat exchanger 20 is installed into the installation groove 101 from the disassembly and assembly opening 102. Since the disassembly and assembly opening 102 faces the panel, in this way, when the heat exchanger 20 needs to be repaired or overhauled, after operating on the face cover of the outer shell and the cover body 200 of the inner shell 10 to make the disassembly opening in an open state, the heat exchanger 20 can be repaired, overhauled or replaced without removing components such as the smoke hood, and the operation process is simple and the installation is convenient.

[0041] The cover body 200 is covered on the disassembly and assembly opening 102. That is to say, the cover body 200 is detachably connected to the bottom shell 100 at the disassembly and assembly opening 102. There are many ways for the cover body 200 and the bottom shell 100 to be detachably connected. Exemplarily, the connection between the cover body 200 and the bottom shell 100 includes but is not limited to threaded connection and snap connection, etc.

[0042] The following takes the threaded connection between the cover body 200 and the bottom shell 100 as an example for elaboration.

[0043] Exemplarily, please refer to Figure 2 and Figure 5 , the cover body 200 is provided with a connection hole 201 for adaptively installing with the bottom shell 100, and the cover body 200 is provided with a first strengthening portion 210 at the periphery of the connection hole 201.

[0044] The bottom shell 100 includes a bottom plate 110 and an installation bracket 120 provided on the bottom plate 110. Both the installation bracket 120 and the cover body 200 have connection holes. For the convenience of description, the connection hole on the installation bracket 120 is the first connection hole, and the connection hole on the cover body 200 is the second connection hole 201. The first connection hole is correspondingly arranged with the second connection hole 201. Fasteners (such as screws or bolts), and the fasteners pass through the second connection hole 201 and the first connection hole, and fix the cover body 200 to the bottom shell 100.

[0045] Among them, the cover body 200 usually has a plurality of connection holes 201 to ensure the tightness and sealing performance between the cover body 200 and the bottom shell 100. At this time, since many holes are opened on the cover body 200 and the area of the cover body 200 is large, this may cause insufficient structural strength of the cover body 200, and problems such as deformation and damage may occur.

[0046] Further, to solve the above problems, a first reinforcing portion 210 is provided at the periphery of the connection hole 201 on the cover body 200. The first reinforcing portion 210 may be a convex portion, a raised portion, a reinforcing rib, etc. provided at the periphery of the connection hole 201.

[0047] In the embodiment, the convex portion refers to a convex step or platform structure designed at the periphery of the connection hole 201 to increase the material thickness and rigidity and provide a more stable connection. The raised portion refers to a pressed shape formed on the plate body around the connection hole 201. The raised portion improves the bending and torsion resistance of this area by increasing the three-dimensional shape of the material, making the entire plate body more robust when subjected to external forces. The reinforcing rib refers to a raised rib or rib designed around the connection hole 201 to enhance the rigidity of the cover body 200 and prevent deformation due to external forces. Preferably, the first reinforcing portion 210 is a raised portion, and the raised portion can be formed by processes such as stamping, die-casting, injection molding, etc. These processes are relatively mature and suitable for large-scale production, reducing the manufacturing cost.

[0048] Furthermore, the cover body 200 has opposite first and second sides, and a part of the cover body 200 protrudes from the first side to the second side to form the first reinforcing portion 210. The first side can be the outer side or the inner side. When the first side is the outer side, the second side is the inner side; when the first side is the inner side, the second side is the outer side.

[0049] Preferably, the first side is the inner side and the second side is the outer side. That is to say, the first reinforcing portion 210 is provided on the side of the cover body 200 facing away from the bottom shell 100 and protrudes toward the side away from the bottom shell 100. In this way, setting the first reinforcing portion 210 on the outer side of the cover body 200 can avoid the first reinforcing portion 210 occupying the space inside the cover body 200, thereby preventing interference with internal components or the spatial layout and facilitating the arrangement and heat dissipation of internal components.

[0050] It is worth mentioning that, based on the previous embodiment, the first reinforcing portion 210 is arranged in a semi-circular ring shape, and the first reinforcing portion 210 is smoothly transitioned with the cover body 200. In this way, compared with other shapes, the semi-circular ring design has no sharp edges, reducing the possible harm to users or other components and increasing safety.

[0051] Further, the first reinforcing portion 210 is a raised portion arranged in a semi-circular ring shape, and the first reinforcing portion 210 is provided on the side of the connection hole 201 away from the edge of the cover body 200. In this way, while the cover body 200 has good structural strength, the sealing performance at the connection between the cover body 200 and the bottom shell 100 is basically not affected.

[0052] In one embodiment, in order to further improve the sealing between the cover body 200 and the bottom shell 100, a folding portion is provided at the edge of the cover body 200, and the folding portion covers the bottom shell 100, and the first reinforcement portion 210 is provided on the side of the connecting hole 201 away from the edge of the cover body 200.

[0053] In another embodiment, in order to facilitate users or maintenance personnel to observe the combustion status, the cover body 200 is further provided with a flame viewing hole 202. By observing the flame color, shape and stability through the flame viewing hole 202, it can be judged whether the combustion is complete, whether the gas supply is normal, and whether there is a gas leak or other potential safety hazards.

[0054] In order to achieve the above effect, the opening area of ​​the fire viewing hole 202 is usually relatively large. In order to improve the structural strength of the cover body 200 at the fire viewing hole 202, the periphery of the fire viewing hole 202 is provided with a second reinforcing portion 220. The second reinforcing portion 220 is similar to the first reinforcing portion 210 and can be a protrusion, a ridge or a reinforcing rib, etc. Preferably, the second reinforcing portion 220 is a protrusion.

[0055] Furthermore, the second reinforcement portion 220 is located on the side of the cover 200 away from the bottom shell 100, which can prevent the first reinforcement portion 210 from occupying the space inside the cover 200, thereby preventing interference with internal components or space layout, and facilitating the arrangement and heat dissipation of internal components.

[0056] It is understandable that there are many shapes and structures of the fire viewing hole 202, which can be regular shapes such as round, oval or square, or other irregular shapes. Furthermore, the fire viewing hole 202 is set in an elliptical shape. The elliptical fire viewing hole 202 can better control the area of ​​the hole compared to other shapes, thereby reducing the loss of heat inside the water heater 1 and reducing heat loss.

[0057] Furthermore, the fire viewing hole 202 is arranged in a vertical elliptical shape, which conforms to the natural sight angle of a person when standing, and the user can conveniently observe the flame without bending or lowering the head, thereby improving the convenience and comfort of use. The vertical elliptical shape is not easy to cause edge stress concentration while maintaining a sufficient viewing angle, thus avoiding the structural fragility caused by the arrangement of the fire viewing hole 202, and improving the overall strength and durability of the water heater 1.

[0058] In another embodiment, in order to strengthen the structural strength of the cover body 200, the cover body 200 is provided with a plurality of third reinforcement parts 230, and the plurality of third reinforcement parts 230 are divided into at least two groups, at least two groups of the third reinforcement parts 230 are arranged along the length direction of the cover body 200, and each group of the third reinforcement parts 230 are arranged at intervals along the width direction of the cover body 200.

[0059] Among them, the third reinforcing part 230 is similar to the first reinforcing part 210 and can be a convex part, a raised part, a reinforcing rib, etc. Preferably, the third reinforcing part 230 is selected as a raised part. Generally speaking, the raised height of the third reinforcing part 230 is greater than that of the first reinforcing part 210. Preferably, each group of the third reinforcing parts 230 is usually evenly spaced along the width direction of the cover body 200.

[0060] In this embodiment, the heat exchanger 20 includes a heat exchange main body 21 and end plates 22 provided at opposite ends of the heat exchange main body 21. The heat exchange main body 21 includes pipes, which are usually made of metal (such as copper, stainless steel, etc.) and have good thermal conductivity. When water passes through these pipes, it is heated. Further, in order to improve the heat exchange efficiency of the heat exchanger 20, the heat exchange main body 21 further includes fins, which are usually provided on the outer walls of the pipes, thereby increasing the surface area of heat exchange and enhancing the heat efficiency. Thus, in this embodiment, when the high-temperature flue gas generated by combustion passes through the pipes or fins in the heat exchanger 20, the heat is transferred to the cold water flowing through the heat exchanger 20, and the cold water is heated in the heat exchanger 20 to become hot water, which is transported to the places where users use it (such as shower heads, wash basins, etc.) through pipes.

[0061] Further, the installation groove 101 includes a receiving groove 101a and a guiding groove 101b that communicate with each other. A guiding inclined surface is provided in the guiding groove 101b. When the end plate 22 is installed from the disassembly and assembly opening 102 to the guiding groove 101b along the guiding inclined surface, the heat exchange main body 21 is installed in the receiving groove 101a.

[0062] Among them, the guiding inclined surface can be provided on the upper groove wall of the guiding groove 101b, or can be provided on the lower groove wall of the guiding groove 101b, or both the upper groove wall and the lower groove wall of the guiding groove 101b are provided with guiding inclined surfaces. The guiding inclined surface can be inclined upward or downward. The upward inclination and downward inclination refer to taking the horizontal plane where the guiding inclined surface is located at the end point of the disassembly opening as the reference plane. If the guiding inclined surface is above the reference plane, it is inclined upward, and if the guiding inclined surface is below the reference plane, it is inclined downward. Generally speaking, it is easy to install when the guiding inclined surface is inclined upward, and it is easy to disassemble when the guiding inclined surface is inclined downward.

[0063] In an exemplary embodiment, please refer to Figure 3 , the bottom shell 100 includes a bottom plate 110 and two installation brackets 120 provided on opposite sides of the bottom plate 110. The receiving groove 101a is formed by enclosing between the bottom plate 110 and the two installation brackets 120, and the two installation brackets 120 respectively form the guiding groove 101b.

[0064] Among them, the bottom shell 100 is usually completed by processes such as sheet metal stamping, casting, and forging. Of course, it can also be completed by welding process. Details will not be elaborated here. That is to say, the bottom plate 110 and the mounting bracket 120 can be integrally formed or separately provided. The mounting bracket 120 is usually also used to mount components such as the burner.

[0065] Further, please continue to refer to Figure 3 , the mounting bracket 120 includes two side plates 121. The two side plates 121 are respectively bent and connected to the bottom plate 110, and a guiding groove 101b is formed between the two side plates 121.

[0066] Taking the bottom shell 100 completed by processes such as sheet metal stamping, casting, and forging as an example, in order to improve the sealing performance between the heat exchanger 20 and the bottom shell 100 and reduce the alignment difficulty between the heat exchanger 20 and the bottom shell 100, the end plate 22 includes an end plate body 22a and a flanging 22b arranged around the end plate body 22a. The side plate 121 is provided with a bending portion (which can also be called the flanging 22b, mainly for the convenience of distinction here) corresponding to the flanging 22b of the end plate 22. After the heat exchanger 20 is installed in the installation groove 101, the flanging 22b and the bending portion are in contact.

[0067] In a preferred embodiment, please continue to refer to Figure 3 , in order to facilitate the alignment and installation of the heat exchanger 20 and the disassembly and assembly opening 102, the distance between the two side plates 121 is arranged to decrease in the direction from the disassembly and assembly opening 102 towards the bottom plate 110. In this way, as the distance decreases, when the heat exchanger 20 moves from the disassembly and assembly opening 102 towards the bottom plate 110, it is gradually surrounded by the side plates 121, which helps to provide better control and positioning during the installation or disassembly process.

[0068] The distance between the two side plates 121 is arranged to decrease in the direction from the disassembly and assembly opening 102 towards the bottom plate 110. Among them, this decreasing arrangement includes but is not limited to gradually decreasing, stepwise decreasing, or other decreasing trends with trend changes.

[0069] Preferably, the distance between the two side plates 121 is arranged to gradually decrease in the direction from the disassembly and assembly opening 102 towards the bottom plate 110. In this way, the cooperation between the two end plates 22 of the heat exchanger 20 and the two side plates 121 of the mounting bracket 120 can make it easy to find the positioning when just put in. As the heat exchanger 20 moves from the disassembly and assembly opening 102 towards the bottom plate 110, the cooperation between the two end plates 22 of the exchanger and the two side plates 121 of the mounting bracket 120 becomes tighter. After the installation is completed, due to the tight cooperation, the components are not easily retracted or loosened due to external force or vibration, thereby enhancing the overall stability and safety.

[0070] In one embodiment, a smooth transition region is formed at the connection between the side plate 121 and the bottom plate 110. The smooth transition region is located within the guiding groove 101b and is arranged as a concave arc surface. The shape of the end plate 22 is adapted to the shape of the guiding groove 101b. That is to say, the part of the end plate 22 adapted to the guiding groove 101b also has a smooth transition, and a convex arc surface adapted to the concave arc surface is provided.

[0071] Thus, in this embodiment, the connection between the side plate 121 and the bottom plate 110 is smoothly arranged. The concave arc surface design of the smooth transition region can effectively disperse the stress at the connection, avoiding stress concentration at sharp corners or edges, thereby reducing the generation of cracks and improving the strength and durability of the overall structure. Secondly, the smooth transition region provided on the end plate 22 reduces the friction and resistance during installation, making it easier for the end plate 22 to slide into the guiding groove 101b, simplifying the installation process, reducing possible misoperations, and making the user more comfortable during operation and installation.

[0072] In one embodiment, the mounting bracket 120 further includes a connecting member 122, and the connecting member 122 is provided with a first mounting hole 122a; the end plate 22 includes an end plate body 22a and a flange 22b provided on the end plate body 22a. The flange 22b is provided with a second mounting hole 22c corresponding to the connecting portion. A fastener passes through the first mounting hole 122a and the second mounting hole 22c and fixes the heat exchanger 20 to the bottom case 100. Fasteners include but are not limited to bolts and screws, etc. The connecting member 122 is usually also arranged in a plate shape and can also be called a connecting plate. The bottom plate 110, the side plate 121, and the connecting plate are usually integrally formed.

[0073] Preferably, the openings 103 of the first mounting hole 122a and the second mounting hole 22c face the panel. In this embodiment, the disassembly opening 102 faces the panel, and the openings 103 of the two mounting holes also face the panel. After the heat exchanger 20 is inserted into the mounting groove 101 from the disassembly opening, the first mounting hole 122a and the second mounting hole 22c can be aligned simultaneously, and screws can be directly driven in the forward direction for assembly. Thus, the alignment and positioning process is simplified, making it easier to align the fasteners with the holes during installation.

[0074] Furthermore, there is usually an installation spacing between the back plate of the outer shell and the bottom plate 110 of the inner shell 10. The installation spacing provides additional operating space for maintenance personnel when overhauling or replacing internal components, making the maintenance work more convenient and fast. Secondly, the installation spacing between the outer shell and the inner shell 10 can form an air isolation layer, using the low thermal conductivity of air to reduce heat transfer, thereby effectively preventing the outer shell from overheating.

[0075] In another embodiment, the inner shell 10 further includes a limiting component 40 which is disposed on the bottom shell 100 and is used to limit the movement of the heat exchanger 20 in the first direction. Taking the example of installing the water heater 1 on a wall or other building, at this time, the first direction refers to the left-right direction. That is to say, in this embodiment, the limiting component 40 is used to limit the movement of the heat exchanger 20 in the left-right direction.

[0076] In this embodiment, there are many forms of the limiting component 40, which can be one or a combination of a limiting block, a limiting plate 41, a limiting column or a limiting pin, etc., and no further examples will be given here. It only needs to be able to limit the heat exchanger 20 from moving in the first direction during the installation process.

[0077] The limiting component 40 can be disposed in the installation groove 101 or outside the installation groove 101. Preferably, the limiting component 40 is disposed in the installation groove 101. The limiting component 40 is disposed in the installation groove 101, which reduces the risk that the operator accidentally touches or damages the limiting component 40 during use and maintenance.

[0078] Furthermore, the limiting component 40 includes a limiting plate 41 and a limiting convex portion 42 disposed on the limiting plate 41, and the limiting convex portion 42 abuts against the end plate 22. It can be understood that in this embodiment, the limiting convex portion 42 abuts against the end plate 22. Compared with the phase plate, the area of the limiting convex portion 42 is generally small, which can form a similar point limit, having the advantages of small contact area, small friction force, and being able to reduce the movement resistance.

[0079] In an exemplary embodiment, please refer to Figures 3 to 5 , the limiting plate 41 includes a limiting plate body 41a, a first bending portion 41b and a second bending portion 41c which are sequentially bent and connected; the limiting plate body 41a and the second bending portion 41c are connected to the mounting bracket 120, the limiting plate body 41a abuts against the end plate 22, there is a gap between the first bending portion 41b and the mounting bracket 120, the second bending portion 41c is disposed on the side of the limiting plate body 41a close to the disassembly and assembly opening 102, and the limiting convex portion 42 is disposed on the second bending portion 41c.

[0080] Thus, in this embodiment, first, through multiple bending designs, the limiting plate 41 can effectively disperse the stress under external forces, reduce local stress concentration, avoid deformation or fracture caused by excessive stress, and enhance the durability and impact resistance of the entire structure. Secondly, through the combination of the limiting plate body 41a, the first bending portion 41b, and the second bending portion 41c, both the limiting plate body 41a and the limiting convex portion 42 are in contact with the end plate 22, forming multi-point limiting, which can more firmly limit the left and right displacement of the heat exchanger 20 and prevent it from loosening or shifting during operation. Compared with single-point limiting and single-surface limiting, the multi-point limiting makes the fitting installation of the limiting plate 41 and the end plate 22 neither too tight nor too loose, maintaining an appropriate elasticity, making the installation process smooth while avoiding damage to the limiting plate 41 or the mounting bracket 120.

[0081] In one embodiment, the end plate 22 and the groove wall of the guiding groove 101b are sealingly connected through a seal 30. Among them, the seal 30 is a high-temperature resistant seal 30, and the high-temperature resistant seal 30 can maintain its elasticity and sealing performance in a high-temperature environment, avoiding gas or liquid leakage at the connection between the end plate 22 and the guiding groove 101b.

[0082] In one embodiment, an opening 103 is provided at the top of the inner shell 10, and the water heater 1 includes a condensing heat exchanger 50, and the condensing heat exchanger 50 covers the opening 103. In this embodiment, by directly covering the condensing heat exchanger 50 at the opening 103 at the top of the inner shell 10, the space inside the water heater 1 can be fully utilized, making the device structure more compact. This design reduces the volume of the water heater 1 and saves installation space.

[0083] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. All equivalent structural transformations made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A burner, characterized in that: include: Bottom shell, and A cover body, which is disposed on the bottom shell and encloses the bottom shell to form a combustion chamber; The cover body is provided with a connection hole for fitting and mounting with the bottom shell, and the cover body is provided with a first reinforcement portion at the periphery of the connection hole.

2. The burner according to claim 1, characterized in that The cover has a first side and a second side opposite to each other, and a portion of the cover protrudes from the first side toward the second side to form the first reinforcement portion.

3. The burner according to claim 2, characterized in that The first side is an inner side and the second side is an outer side.

4. The burner according to any one of claims 1 to 3, characterized in that: The first reinforcement portion is a raised portion.

5. The burner according to claim 4, characterized in that The first reinforcement portion is arranged in a semicircular ring shape.

6. The burner according to claim 5, characterized in that A folding portion is provided at the edge of the cover body, and the folding portion covers the bottom shell. The first reinforcing portion is provided on a side of the connecting hole away from the edge of the cover body.

7. The burner according to claim 5, characterized in that The cover body is also provided with a fire viewing hole, and a second reinforcement portion is provided around the periphery of the fire viewing hole. The second reinforcement portion is located on a side of the cover body away from the bottom shell.

8. The burner according to claim 7, characterized in that The fire viewing hole is arranged in an elliptical shape.

9. A water heater, characterized in that: include: shell; as well as The burner according to any one of claims 1 to 8, wherein the burner is arranged in the housing.

10. The water heater according to claim 9, characterized in that The outer shell has a panel; the bottom shell is formed with a mounting groove and a disassembly port connected to the mounting groove, the disassembly port is arranged toward the panel, and the cover body is covered on the disassembly port; the water heater includes a heat exchanger, and the heat exchanger is installed from the disassembly port to the mounting groove.

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