Water heater

Abstract

The utility model discloses a water heater, relates to the technical field of water heater equipment, the water heater comprises an outer shell, an inner shell and a heat exchanger, the outer shell is provided with a panel, the inner shell comprises a bottom shell and a cover body, the bottom shell is provided with an installation groove and a disassembly and assembly opening communicated with the installation groove, the disassembly and assembly opening is arranged towards the panel, and the heat exchanger is arranged on the inner shell. The cover body is arranged on the dismounting and mounting opening in a covering mode. And the heat exchanger is mounted in the mounting groove from the dismounting opening. According to the technical scheme, the inner shell is provided with the installation groove and the disassembly and assembly opening facing the panel, in the installation process, the heat exchanger can be directly installed in the installation groove of the inner shell through the disassembly and assembly opening, and steps and time needed for installing the heat exchanger are reduced; in the dismounting process, operation can be directly carried out from the dismounting opening only by opening the cover body, and the whole shell or other parts do not need to be removed, so that the maintenance process is simplified, the maintenance convenience and efficiency are improved, the dismounting difficulty is reduced, and the dismounting operation time is shortened.

Description

Technical Field

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

[0002] In the related prior art, when a gas water heater needs to be repaired or the heat exchanger needs to be replaced, multiple components such as the combustion chamber and the smoke hood need to be disassembled before the operation can be carried out. The operation is cumbersome and time-consuming, bringing great inconvenience to after-sales service and installation work. Summary of the Utility Model

[0003] The main purpose of the utility model is to propose a water heater, aiming to reduce the disassembly and assembly difficulty of the heat exchanger in the water heater.

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

[0005] A housing with a panel;

[0006] An inner housing disposed inside the housing. The inner housing includes a bottom shell and a cover body. The bottom shell is formed with an installation groove and a disassembly and assembly port communicating with the installation groove. The disassembly and assembly port faces the panel, and the cover body covers the disassembly and assembly port; and

[0007] A heat exchanger installed into the installation groove from the disassembly and assembly port.

[0008] In one embodiment, the heat exchanger includes a heat exchange main body and end plates disposed at opposite ends of the heat exchange main body. The installation groove includes a receiving groove and a guiding groove communicating with each other. The guiding groove is provided with a guiding inclined surface. When the end plate is installed into the guiding groove from the disassembly and assembly port along the guiding inclined surface, the heat exchange main body is installed into the receiving groove.

[0009] In one embodiment, the bottom shell includes a bottom plate and two installation brackets disposed on opposite sides of the bottom plate. The receiving groove is formed by enclosing between the bottom plate and the two installation brackets, and the two installation brackets respectively form the guiding groove.

[0010] In one embodiment, the installation bracket includes two side plates, and the two side plates are respectively bent and connected to the bottom plate, and the guiding groove is formed between the two side plates.

[0011] In one embodiment, the distance between the two side plates is arranged to decrease in a trend from the disassembly and assembly port towards the direction of the bottom plate.

[0012] In one embodiment, a smooth transition region is formed at the connection between the side plate and the bottom plate. The smooth transition region is located in the guiding groove and is arranged in a concave arc surface.

[0013] In one embodiment, the mounting bracket further includes a connecting member provided with a first mounting hole; the end plate includes an end plate body and a flange provided on the end plate body, and the flange is provided with a second mounting hole corresponding to the connecting portion. A fastener passes through the first mounting hole and the second mounting hole to fix the heat exchanger to the bottom case.

[0014] In one embodiment, the openings of the first mounting hole and the second mounting hole face the panel.

[0015] In one embodiment, the end plate and the groove wall of the guiding groove are sealingly connected by a sealing member.

[0016] In one embodiment, the inner case further includes a limiting assembly provided on the bottom case for restricting the movement of the heat exchanger in a first direction.

[0017] In one embodiment, the limiting assembly is provided in the mounting groove. The limiting assembly includes a limiting plate and a limiting convex portion provided on the limiting plate, and the limiting convex portion abuts against the end plate.

[0018] In one embodiment, the limiting plate includes a limiting plate body, a first bending portion and a second bending portion that are sequentially bent and connected; the limiting plate body and the second bending portion are connected to the mounting bracket, the limiting plate body abuts against the end plate, there is a gap between the first bending portion and the mounting bracket, the second bending portion is provided on one side of the limiting plate body close to the disassembly and assembly opening, and the limiting convex portion is provided on the second bending portion.

[0019] In one embodiment, an opening is provided at the top of the inner case, and the water heater includes a condensation heat exchanger that covers the opening.

[0020] The technical solution of the present utility model reduces the steps and time required for installing the heat exchanger by providing a mounting groove and a disassembly and assembly opening facing the panel in the inner case. During the installation process, the heat exchanger can be directly installed into the mounting groove of the inner case through the disassembly and assembly opening; during the disassembly process, only the cover needs to be opened, and the operation can be directly performed through the disassembly and assembly opening without removing the entire outer shell or other components. This simplifies the maintenance process, improves the convenience and efficiency of maintenance, and reduces the difficulty and operation time of disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 describing the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0022] Figure 1 Schematic diagram of the structure of an embodiment of the water heater provided by the present utility model;

[0023] Figure 2 is Figure 1 partial exploded view of;

[0024] Figure 3 is Figure 2 partial enlarged view in;

[0025] Figure 4 is Figure 3 enlarged view at position A in;

[0026] Figure 5 is Figure 1 schematic diagram of the structure of the cover body in;

[0027] Figure 6 is Figure 5 enlarged view at position B in;

[0028] Figure 7 is Figure 1 front view after hiding the cover body in.

[0029] Explanation of the reference numerals in the drawings:

[0030] 1, water heater;

[0031] 10, inner shell; 100, bottom shell; 101, installation groove; 101a, accommodating groove; 101b, guiding groove; 102, disassembly and assembly opening; 103, opening; 110, bottom plate; 120, installation bracket; 121, side plate; 122, connecting member; 122a, first installation hole; 200, cover body; 201, connecting hole; 202, flame viewing hole; 210, first strengthening portion; 220, second strengthening portion; 230, third strengthening portion;

[0032] 20, heat exchanger; 21, heat exchange main body; 22, end plate; 22a, end plate body; 22b, flanging; 22c, second installation hole; 30, sealing member; 40, limiting assembly; 41, limiting plate; 41a, limiting plate body; 41b, first bending portion; 41c, second bending portion; 42, limiting convex portion; 50, condensation heat exchanger.

[0033] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] 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 invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, 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 various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions 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 invention.

[0037] The present invention provides a water heater, which generally refers to a gas water heater and aims to reduce the disassembly and assembly difficulty of the heat exchanger. For the convenience of understanding and description, in the attached Figures 1 to 7 drawings of the present invention, the solid-line arrows indicate space, slots or holes.

[0038] Please refer to Figures 1 to 3 , in an embodiment of the present invention, the water heater 1 includes a housing and an inner housing 10. The specific structure of the water heater 1 will be described below.

[0039] Among them, the main function of the outer shell is to provide structural support and firmly hold the internal components of the gas water heater 1 together. Generally speaking, the outer shell includes a back shell and a face cover that are detachably connected, and an installation cavity is formed by enclosing 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 panel and second mounting plates provided on the left and right sides of the panel. In this embodiment, the panel is arranged opposite to the back plate, and the panel is usually equipped with a temperature adjustment button or knob, and the user can set the required water temperature by adjustment. Or, an electronic 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, reduce 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 a burner, a heat exchanger 20 or a 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.

[0040] The inner shell 10 is arranged inside the outer shell. The main function of the inner shell 10 is to enclose a combustion area and isolate 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 outer shell during the operation of the water heater 1, avoid the overall temperature of the equipment from being too high, and thus improve the service life.

[0041] 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 a mounting groove 101 and a disassembly and assembly port 102 communicating with the mounting groove 101. The disassembly and assembly port 102 faces the panel. The cover body 200 covers the disassembly and assembly port 102, and the heat exchanger 20 is installed into the mounting groove 101 from the disassembly and assembly port 102. Since the disassembly and assembly port 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 port 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.

[0042] The cover body 200 covers the disassembly and assembly port 102, that is to say, the cover body 200 is detachably connected to the bottom shell 100 at the disassembly and assembly port 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.

[0043] Taking the example of the cover body 200 and the bottom shell 100 being connected by threads, the following is an elaboration.

[0044] Exemplarily, please refer to Figure 2 and Figure 5 , the cover body 200 is provided with a connection hole 201 for fitting and 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.

[0045] The bottom shell 100 includes a bottom plate 110 and a mounting bracket 120 provided on the bottom plate 110. Both the mounting bracket 120 and the cover body 200 have connection holes. For the convenience of description, the connection hole on the mounting bracket 120 is taken as the first connection hole, and the connection hole on the cover body 200 is taken as the second connection hole 201. The first connection hole is provided corresponding to the second connection hole 201. Fasteners (such as screws or bolts), 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.

[0046] Among them, the cover body 200 usually has a plurality of connection holes 201 to ensure the tightness and sealing performance of the connection 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 relatively large, this may lead to insufficient structural strength of the cover body 200, and problems such as deformation and damage may occur.

[0047] Furthermore, to solve the above problems, the cover body 200 is provided with a first strengthening portion 210 at the periphery of the connection hole 201. Among them, the first strengthening portion 210 can be a protruding portion, a raised portion or a reinforcing rib, etc. provided at the periphery of the connection hole 201.

[0048] In the embodiment, the protruding portion refers to designing a protruding step or platform structure 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 stamping a pressed shape on the plate body around the connection hole 201. The raised portion improves the anti-bending and anti-twisting capabilities of this area by increasing the three-dimensional shape of the material, making the entire plate body more solid when subjected to external forces. The reinforcing rib refers to designing a protruding rib or rib strip around the connection hole 201 to enhance the rigidity of the cover body 200 and prevent deformation due to external forces. Preferably, the first strengthening portion 210 is a raised portion, and the raised portion can be formed by processes such as stamping, die-casting, and injection molding. These processes are relatively mature and suitable for large-scale production, reducing the manufacturing cost.

[0049] Even further, 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 strengthening portion 210. Among them, 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.

[0050] 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 case 100 and protrudes toward the side away from the bottom case 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 contributing to the arrangement and heat dissipation of internal components.

[0051] 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.

[0052] Furthermore, 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 can have better structural strength, it basically does not affect the sealing performance at the connection between the cover body 200 and the bottom case 100.

[0053] In one embodiment, in order to further improve the sealing performance between the cover body 200 and the bottom case 100, a folding portion is provided at the edge of the cover body 200, the folding portion is arranged to cover the bottom case 100, 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.

[0054] In another embodiment, in order to facilitate users or maintenance personnel to observe the combustion state, a fire viewing hole 202 is further provided on the cover body 200. By observing the flame color, shape and stability through the fire viewing hole 202, it is possible to judge whether the combustion is complete, whether the gas supply is normal, and whether there is air leakage or other potential safety hazards.

[0055] Among them, in order to achieve the above effects, the opening area of the fire viewing hole 202 is usually relatively large. In order to enhance the structural strength of the cover body 200 at the fire viewing hole 202, a second reinforcing portion 220 is provided at the periphery of the fire viewing hole 202. The second reinforcing portion 220 is similar to the first reinforcing portion 210 and can be a protrusion, a raised portion or a reinforcing rib, etc. Preferably, the second reinforcing portion 220 is selected as a protrusion.

[0056] Furthermore, the second reinforcing portion 220 is located on the side of the cover body 200 facing away from the bottom case 100, which 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 contributing to the arrangement and heat dissipation of internal components.

[0057] It can be understood that there are many shapes and structures of the viewing holes 202, which can be regular shapes such as circular, oval or square, or other irregular shapes. Further, the viewing holes 202 are arranged in an oval shape. The oval viewing holes 202 can better control the area of the holes compared to other shapes, thereby reducing the heat loss inside the water heater 1 and lowering the heat loss.

[0058] Furthermore, the viewing holes 202 are arranged in a vertical oval shape. The vertical oval viewing holes 202 conform to the natural line-of-sight angle when a person stands. Users can conveniently observe the flame without bending down or lowering their heads, improving the convenience and comfort of use. While maintaining a sufficient viewing angle, the vertical oval shape is not prone to edge stress concentration, avoiding structural weakness caused by the setting of the viewing holes 202 and enhancing the overall strength and durability of the water heater 1.

[0059] In another embodiment, in order to strengthen the structural strength of the cover 200, the cover 200 is provided with a plurality of third strengthening parts 230. The plurality of third strengthening parts 230 are divided into at least two groups. At least two groups of the third strengthening parts 230 are arranged along the length direction of the cover 200, and each group of the third strengthening parts 230 is arranged at intervals along the width direction of the cover 200.

[0060] Among them, the third strengthening part 230 is similar to the first strengthening part 210 and can be a convex part, a raised part or a reinforcing rib, etc. Preferably, the third strengthening part 230 is selected as a raised part. Generally speaking, the raised height of the third strengthening part 230 is greater than that of the first strengthening part 210. Preferably, each group of the third strengthening parts 230 is usually arranged at uniform intervals along the width direction of the cover 200.

[0061] 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 wall 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 the pipes.

[0062] 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 along the guiding inclined surface to the guiding groove 101b, the heat exchange body 21 is installed in the receiving groove 101a.

[0063] Among them, the guiding inclined surface can be provided on the upper groove wall of the guiding groove 101b, or on the lower groove wall of the guiding groove 101b. Or, guiding inclined surfaces are provided on both the upper groove wall and the lower groove wall of the guiding groove 101b. The guiding inclined surface can be inclined upward or downward. The so-called 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; if the guiding inclined surface is below the reference plane, it is inclined downward. Generally speaking, an upward inclination of the guiding inclined surface is easy for installation, and a downward inclination of the guiding inclined surface is easy for disassembly.

[0064] 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.

[0065] Among them, the bottom shell 100 is usually completed by processes such as stamping, casting, and forging of plates. Of course, it can also be completed by a welding process. Details will not be elaborated here one by one. That is to say, the bottom plate 110 and the installation brackets 120 can be integrally formed or separately provided. The installation brackets 120 are usually also used to install components such as a burner.

[0066] Further, please continue to refer to Figure 3 , the installation bracket 120 includes two side plates 121. The two side plates 121 are respectively bent and connected to the bottom plate 110, and the guiding groove 101b is formed between the two side plates 121.

[0067] Among them, taking the bottom shell 100 completed by processes such as stamping, casting, and forging of plates 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 provided around the end plate body 22a. The side plate 121 is provided with a bending portion (which can also be called a flanging, 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.

[0068] In a preferred embodiment, please continue to refer to Figure 3, To facilitate the alignment and installation of the heat exchanger 20 and the disassembly and installation port 102, the distance between the two side plates 121 is arranged to decrease in the direction from the disassembly and installation port 102 towards the bottom plate 110. In this way, as the distance decreases, when the heat exchanger 20 moves from the disassembly and installation port 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.

[0069] The distance between the two side plates 121 is arranged to decrease in the direction from the disassembly and installation port 102 towards the bottom plate 110, wherein this decreasing arrangement includes but is not limited to gradually decreasing, stepwise decreasing or other decreasing trends with trend changes.

[0070] Preferably, the distance between the two side plates 121 is arranged to gradually decrease in the direction from the disassembly and installation port 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 placed in. As the heat exchanger 20 moves from the disassembly and installation port 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.

[0071] In an 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 guide groove 101b and is arranged as a concave arc surface. The shape of the end plate 22 is adapted to the shape of the guide groove 101b, that is to say, the part of the end plate 22 adapted to the guide groove 101b also has a smooth transition and is arranged as a convex arc surface adapted to the concave arc surface.

[0072] In this way, 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, avoid stress concentration on sharp corners or edges, thereby reducing the generation of cracks and improving the strength and durability of the overall structure. Secondly, a smooth transition region is provided on the end plate 22, reducing the friction and resistance during installation, making it easier for the end plate 22 to slide into the guide groove 101b, simplifying the installation process, reducing possible misoperations, and making the user more comfortable during the operation and installation process.

[0073] 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, and 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 to fix 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 provided 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.

[0074] 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. In this way, the alignment and positioning process is simplified, and it is easier to align the fasteners with the holes during the installation process.

[0075] 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, and the low thermal conductivity of air is used to reduce heat transfer, thereby effectively preventing the outer shell from overheating.

[0076] In another embodiment, the inner shell 10 further includes a limiting assembly 40, and the limiting assembly 40 is provided on the bottom case 100 for restricting the movement of the heat exchanger 20 in a 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 assembly 40 is used to restrict the movement of the heat exchanger 20 in the left-right direction.

[0077] In this embodiment, there are many forms of the limiting assembly 40, which can be one or a combination of a limiting block, a limiting plate 41, a limiting post or a limiting pin, etc. Examples are not given one by one here. It only needs to be able to restrict the heat exchanger 20 from moving in the first direction during the installation process.

[0078] The limiting component 40 can be arranged in the installation groove 101 or outside the installation groove 101. Preferably, the limiting component 40 is arranged in the installation groove 101. Arranging the limiting component 40 in the installation groove 101 reduces the risk that the operator accidentally touches or damages the limiting component 40 during use and maintenance.

[0079] Further, the limiting component 40 includes a limiting plate 41 and a limiting convex portion 42 arranged 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.

[0080] 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 that are sequentially bent and connected; the limiting plate body 41a and the second bending portion 41c are connected to the installation 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 installation bracket 120, the second bending portion 41c is arranged on one side of the limiting plate body 41a close to the disassembly and assembly opening 102, and the limiting convex portion 42 is arranged on the second bending portion 41c.

[0081] Thus, in this embodiment, first, through the multiple bending design of the limiting plate 41, the stress under the action of external force can be effectively dispersed, reducing local stress concentration, avoiding deformation or fracture caused by excessive stress, and enhancing the durability and impact resistance of the entire structure. Second, 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 abut against the end plate 22, forming a multi-point limit, 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 limit and single surface limit, the multi-point limit makes the fitting and installation of the limiting plate 41 and the end plate 22 neither too tight nor too loose, maintaining appropriate elasticity, making the installation process smooth while avoiding damaging the limiting plate 41 or the installation bracket 120.

[0082] In one embodiment, the end plate 22 and the groove wall of the guiding groove 101b are hermetically connected through a sealing member 30. Among them, the sealing member 30 is a high-temperature resistant sealing member 30, and the high-temperature resistant sealing member 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.

[0083] 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 which 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 the installation space.

[0084] The above is only an exemplary embodiment of the present utility model, and thus does not limit the patent scope of the present utility model. Any equivalent structural transformation 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 any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A water heater, characterized in that: include: a housing having a panel; an inner shell, arranged in the outer shell, the inner shell comprising a bottom shell and a cover body, the bottom shell is formed with a mounting groove and a disassembly opening communicating with the mounting groove, the disassembly opening is arranged toward the panel, and the cover body is arranged to cover the disassembly opening; and The heat exchanger is installed from the disassembly opening to the installation groove.

2. The water heater according to claim 1, characterized in that: The heat exchanger includes a heat exchange body and end plates arranged at opposite ends of the heat exchange body, the installation groove includes a receiving groove and a guide groove that are interconnected, and a guide inclined surface is provided in the guide groove. When the end plate is installed from the disassembly and assembly port along the guide inclined surface to the guide groove, the heat exchange body is installed to the receiving groove.

3. The water heater according to claim 2, characterized in that: The bottom shell includes a bottom plate and two mounting brackets arranged on opposite sides of the bottom plate. The bottom plate and the two mounting brackets enclose the accommodating groove, and the two mounting brackets respectively form the guiding grooves.

4. The water heater according to claim 3, characterized in that: The mounting bracket comprises two side plates, the two side plates are respectively bent and connected to the bottom plate, and the guide groove is formed between the two side plates.

5. The water heater according to claim 4, characterized in that The distance between the two side plates is arranged to decrease from the disassembly opening toward the bottom plate.

6. The water heater according to claim 5, characterized in that A smooth transition area is formed at the connection between the side plate and the bottom plate. The smooth transition area is located in the guide groove and is arranged in a concave arc surface.

7. The water heater according to claim 3, characterized in that: The mounting bracket further comprises a connecting piece, and the connecting piece is provided with a first mounting hole; The end plate includes an end plate body and a flange provided on the end plate body, the flange is provided with a second mounting hole corresponding to the connecting portion, and a fastener passes through the first mounting hole and the second mounting hole and fixes the heat exchanger to the bottom shell.

8. The water heater according to claim 7, characterized in that The openings of the first mounting hole and the second mounting hole are arranged toward the panel.

9. The water heater according to claim 3, characterized in that: The end plate and the groove wall of the guide groove are sealed and connected via a sealing member.

10. The water heater according to any one of claims 3 to 9, characterized in that: The inner shell further includes a limiting assembly, which is disposed on the bottom shell and is used to limit the movement of the heat exchanger along a first direction.

11. The water heater according to claim 10, characterized in that The limiting assembly is arranged in the installation groove, and the limiting assembly includes a limiting plate and a limiting protrusion arranged on the limiting plate, and the limiting protrusion is in contact with the end plate.

12. The water heater according to claim 11, characterized in that The limiting plate includes a limiting plate body, a first bending portion and a second bending portion which are bent and connected in sequence; the limiting plate body and the second bending portion are connected to the mounting bracket, the limiting plate body abuts against the end plate, there is a gap between the first bending portion and the mounting bracket, the second bending portion is arranged on a side of the limiting plate body close to the disassembly and assembly port, and the limiting protrusion is arranged on the second bending portion.

13. The water heater according to claim 10, characterized in that The top of the inner shell is provided with an opening, and the water heater comprises a condensing heat exchanger, and the condensing heat exchanger is sealed on the opening.

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