Gas water heater

Abstract

The utility model discloses a gas water heater and relates to the technical field of water heaters. The gas water heater comprises a bottom frame, a heat exchanger and a cover plate, a mounting cavity and a dismounting opening communicating with the mounting cavity are formed in the bottom frame, and two inserting grooves communicating with the dismounting opening are formed in the two opposite sides of the mounting cavity; the heat exchanger comprises two end plates and a heat exchange main body mounted between the two end plates, the two end plates are correspondingly inserted into the two inserting grooves through the disassembly and assembly openings, and the heat exchange main body is mounted in the mounting cavity; the cover plate covers the dismounting opening and is detachably fixed with the bottom frame; the opening width of the inserting groove is in a trend of decreasing from the disassembly and assembly opening to the direction deviating from the disassembly and assembly opening; the height dimension of the end plate tends to decrease from the direction close to the cover plate to the direction away from the cover plate. According to the technical scheme, the assembly structure of the heat exchanger can be simplified, and the disassembly and assembly difficulty of the heat exchanger is reduced.

Description

Technical Field

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

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

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

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

[0005] A bottom frame, which forms an installation cavity and a disassembly and assembly opening communicating with the installation cavity. Two insertion slots communicating with the disassembly and assembly opening are provided on opposite sides of the installation cavity;

[0006] A heat exchanger, including two end plates and a heat exchange main body installed between the two end plates. The two end plates are correspondingly inserted into the two insertion slots through the disassembly and assembly opening, and the heat exchange main body is installed in the installation cavity; and

[0007] A cover plate, which covers the disassembly and assembly opening and is detachably fixed to the bottom frame;

[0008] Wherein, the opening width of the insertion slot decreases from the disassembly and assembly opening in the direction away from the disassembly and assembly opening; the height dimension of the end plate decreases from the direction close to the cover plate in the direction away from the cover plate.

[0009] In an embodiment of the present application, the upper slot wall and / or the lower slot wall of the insertion slot has a slope;

[0010] The upper end face and / or the lower end face of the end plate has a slope.

[0011] In an embodiment of the present application, a smooth transition area is formed at the connection between the slot wall of the insertion slot away from the disassembly and assembly opening and the upper slot wall of the insertion slot, and / or, a smooth transition area is formed at the connection between the slot wall of the insertion slot away from the disassembly and assembly opening and the lower slot wall of the insertion slot;

[0012] The smooth transition area is arranged in a concave arc surface, and the two corners at one end of the end plate away from the cover plate are in a rounded corner structure.

[0013] In an embodiment of the present application, the end plate and the slot wall of the insertion slot are sealed and connected through a sealing member.

[0014] In an embodiment of the present application, a first fastening member is provided at a position of the bottom frame corresponding to at least one of the insertion slots, and a second fastening member is provided on at least one of the end plates. The second fastening member is used for fastening and cooperating with the first fastening member when the heat exchange body is installed in the installation cavity.

[0015] In an embodiment of the present application, the first fastening member is located at an end of the insertion slot close to the disassembly and assembly opening; the second fastening member is located at an end of the end plate close to the cover plate.

[0016] In an embodiment of the present application, the bottom frame includes a back plate, two side plates and a top plate. The two side plates are respectively connected to opposite sides of the back plate. The upper end of the back plate protrudes from the side plates. The top plate is angularly connected to the upper end of the back plate and is spaced apart from the side plates;

[0017] The installation cavity is formed by enclosing the top plate, the two side plates and the back plate. The disassembly and assembly opening faces the back plate;

[0018] Two insertion slots are respectively formed by enclosing the opposite side edges of the top plate, the opposite side edges of the back plate and the upper edges of the two side plates;

[0019] The cover plate is connected to the top plate and the two side plates to cover the disassembly and assembly opening.

[0020] In an embodiment of the present application, the top plate is recessed inward in a direction away from the installation cavity to form a smoke hood, and a smoke pipe communicating with the installation cavity is provided on the top plate;

[0021] The back plate includes a first back plate and a second back plate provided above the first back plate. The two side plates are connected to two sides of the first back plate, and the upper edge of the second back plate is connected to the top plate;

[0022] Wherein, the top plate and the second back plate are of an integral structure, and the second back plate and the first back plate are of an integral structure or a split structure.

[0023] In an embodiment of the present application, extension edges are provided on opposite sides of the back plate, and first connection holes are provided on the extension edges;

[0024] A first flanging is provided at an end of the end plate away from the cover plate, and a second connection hole is provided on the first flanging. When the end plate is inserted into the insertion slot, the second connection hole is aligned with the first connection hole;

[0025] Wherein, the opening directions of the second connection hole and the first connection hole are consistent with the insertion direction of the heat exchanger;

[0026] One end of the end plate close to the cover plate is provided with a second flanging, and the second flanging is provided with a third connection hole; an avoidance opening is arranged at a position corresponding to the second connection hole on the second flanging;

[0027] The cover plate is provided with a fourth connection hole. When the cover plate covers the disassembly and assembly opening, the fourth connection hole is aligned with the third connection hole;

[0028] Wherein, the opening directions of the fourth connection hole and the third connection hole are the same as the insertion direction of the heat exchanger.

[0029] In an embodiment of the present application, the gas water heater further includes a burner. Guide ribs are provided on the inner wall surface of the bottom frame, and the burner is inserted into the installation cavity along the guide ribs through the disassembly and assembly opening;

[0030] The depth dimension of the guide rib relative to the inner wall surface of the bottom frame is 1.5 mm to 3 mm.

[0031] In the gas water heater of the technical solution of the present utility model, by forming an installation cavity and a disassembly and assembly opening communicating with the installation cavity on the bottom frame, and two insertion slots communicating with the disassembly and assembly opening are arranged on opposite sides of the installation cavity, during the installation process, the end plate of the heat exchanger can be directly inserted along the insertion slot through the disassembly and assembly opening, so that the heat exchange main body is installed in the installation cavity of the bottom frame, and then the cover plate is covered on the disassembly and assembly opening and fixed to the bottom frame to realize the installation of the heat exchanger, which reduces the steps and time required for installing the heat exchanger; during the disassembly process, only need to open the cover plate, and the end plate of the heat exchanger can be directly pulled out from the insertion slot b through the disassembly and assembly opening, without removing other components such as the entire outer shell or the smoke hood. Such a design can simplify the assembly structure of the heat exchanger and reduce the disassembly and assembly difficulty of the heat exchanger.

[0032] In addition, by making the opening width of the insertion slot show a decreasing trend from the disassembly and assembly opening towards the direction away from the disassembly and assembly opening; and the height dimension of the end plate show a decreasing trend from the direction close to the cover plate towards the direction away from the cover plate, it is more convenient for the end plate to be inserted into the insertion slot or withdrawn from the insertion slot, further improving the disassembly and assembly convenience of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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 following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0034] Figure 1 It is a schematic assembly structure diagram of the bottom frame, heat exchanger, cover plate and smoke pipe in the gas water heater of the present utility model;

[0035] Figure 2 This is a schematic structural view of an embodiment of the bottom frame in the gas water heater of the present utility model;

[0036] Figure 3 This is an exploded structural view of the bottom frame, heat exchanger and cover plate in the main embodiment of the present utility model;

[0037] Figure 4 This is a schematic assembly structure view of the bottom frame and the smoke pipe in the gas water heater of the present utility model;

[0038] Figure 5 This is a schematic assembly structure view of the bottom frame and the heat exchanger in the gas water heater of the present utility model;

[0039] Figure 6 It is Figure 5 The partial enlarged view at M in

[0040] Figure 7 This is a schematic assembly structure view of the bottom frame, heat exchanger and burner in the main gas water heater of the present utility model.

[0041] Explanation of the reference numerals in the drawings:

[0042] Label Name Label Name 11 Bottom frame 102 Disassembly and assembly opening 111 Back panel 103 First connection hole 111a First back panel 104 Fourth connection hole 111b Second back panel 13 First fastening part 1111 Extension edge 2 Heat exchanger 112 Side panel 21 End plate 113 Top plate 211 First flanging 1131 Third flanging 212 Second flanging 114 Bottom plate 22 Heat exchange body 115 Guide rib 23 Second fastening part 12 Cover plate 201 Second connection hole 121 Guide folding edge 202 Third connection hole 101 Installation cavity 203 Avoidance opening 101a Receiving groove 3 Burner 101b Insertion slot 4 Smoke pipe

[0043] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0044] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to 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 of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0045] 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 the components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0046] 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.

[0047] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be construed as indicating or implying their relative importance or implicitly specifying 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, the technical solutions between various embodiments may 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 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.

[0048] In the related art, a gas water heater includes multiple components such as a heat exchanger, a combustion chamber housing, and a burner. When disassembly and assembly operations are required for maintenance or replacement, it may be necessary to perform assembly from multiple angles and directions. Especially when the heat exchanger needs to be removed, multiple components such as the combustion chamber housing and the smoke hood need to be disassembled first before the operation can be carried out. The operation is cumbersome and time-consuming, bringing great inconvenience to after-sales service and installation work.

[0049] For this reason, the present utility model proposes a gas water heater, aiming to simplify the assembly structure of the heat exchanger and reduce the disassembly and assembly difficulty of the heat exchanger.

[0050] As Figures 1 to 6 shown, the gas water heater includes a bottom frame 11, a heat exchanger 2, and a cover plate 12. The bottom frame 11 is formed with an installation cavity 101 and a disassembly and assembly opening 102 communicating with the installation cavity 101. Two insertion slots 101b communicating with the disassembly and assembly opening 102 are provided on opposite sides of the installation cavity 101; the heat exchanger 2 includes two end plates 21 and a heat exchange main body 22 installed between the two end plates 21. The two end plates 21 are correspondingly inserted into the two insertion slots 101b, and the heat exchange main body 22 is installed in the accommodation groove 101a; the cover plate 12 covers the disassembly and assembly opening 102 and is detachably fixed to the bottom frame 11; wherein, the opening width of the insertion slot 101b gradually decreases from the disassembly and assembly opening 102 in a direction away from the disassembly and assembly opening 102; the height dimension of the end plate 21 gradually decreases from a position close to the cover plate 12 in a direction away from the cover plate 12.

[0051] The bottom frame 11 has a semi-enclosed structure with a side opening. For example, the bottom frame 11 can be set to a structure with a "C"-shaped cross-section. An installation cavity 101 and a disassembly and assembly opening 102 communicating with the installation cavity 101 are formed inside the bottom frame 11. The installation cavity 101 can be used to install components such as the heat exchanger 2 and the burner 3. The disassembly and assembly opening 102 can be part or all of the side opening of the bottom frame 11. The heat exchanger 2 and / or the burner 3 can be inserted into the installation cavity 101 from the disassembly and assembly opening 102 for assembly.

[0052] The heat exchange body 22 includes pipes, which are usually made of metals (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 2, the heat exchange body 22 further includes fins, which are usually arranged on the outer walls of the pipes, so as to increase the surface area of heat exchange and improve the thermal efficiency. Thus, in this embodiment, when the high-temperature flue gas generated by combustion passes through the pipes or fins in the heat exchanger 2, the heat is transferred to the cold water flowing through the heat exchanger 2, and the cold water is heated in the heat exchanger 2 to become hot water, which is transported to the places where users use it (such as shower heads, wash basins, etc.) through the pipes.

[0053] Specifically, the installation cavity 101 includes a receiving groove 101a and two insertion grooves 101b arranged on opposite sides of the receiving groove 101a, and the two insertion grooves 101b communicate with the disassembly and assembly opening 102. The two insertion grooves 101b can play a role in guiding and limiting the end plates 21. The receiving groove 101a can be understood as a space for receiving the heat exchange body 22. The two end plates 21 are inserted along the groove walls of the insertion grooves 101b, driving the heat exchange body 22 to be installed into the receiving groove 101a.

[0054] The opening width of the insertion groove 101b shows a decreasing trend from the disassembly and assembly opening 102 towards the direction away from the cover plate 12. It can be understood that the opening width of the insertion groove 101b is the largest at the disassembly and assembly opening 102, which is convenient for the insertion and extraction of the end plates 21, and further improves the disassembly and assembly convenience of the heat exchanger 2. In actual application, this decreasing trend includes gradually decreasing, stepwise decreasing or other trend-changing decreases. Preferably, the opening width of the insertion groove 101b gradually decreases from the disassembly and assembly opening 102 towards the direction away from the cover plate 12, so that the cooperation between the two end plates 21 of the heat exchanger 2 and the insertion groove 101b can make it easy to find the positioning when just put in. As the heat exchanger 2 moves inward from the disassembly and assembly opening 102, the cooperation between the two end plates 21 and the upper and lower groove walls of the insertion groove 101b 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.

[0055] It should be noted that, since the heat exchanger 2 is inserted into the insertion slot 101b, the upper end surface of the end plate 21 matches with the upper slot wall of the insertion slot 101b, and the lower end surface of the end plate 21 matches with the lower slot wall of the insertion slot 101b. The height dimension of the end plate 21 decreases from the direction close to the cover plate 12 to the direction away from the cover plate 12. It can be understood that the height dimension of the end plate 21 on the side facing the insertion slot 101b is the smallest, which can facilitate the insertion and withdrawal of the end plate 21, and further improve the convenience of disassembly and assembly of the heat exchanger 2. In actual application, the height dimension of the end plate 21 decreases from the direction close to the cover plate 12 to the direction away from the cover plate 12, including gradual reduction, step-by-step reduction or other trend changes. Preferably, the distance between the upper end surface and the lower end surface of the end plate 21 gradually decreases, so that the two end plates 21 of the heat exchanger 2 fit more closely with the insertion slot 101b, and the components are not easily retreated or loosened due to external force or vibration, thereby enhancing the overall stability and safety.

[0056] In addition, in actual application, in order to prevent the internal heat from leaking out, a seal is provided on the groove wall of the insertion groove 101b, and the end plate 21 is sealed and connected with the groove wall of the insertion groove 101b by extruding the seal. Through the above design, the end plate 21 will not scratch the seal during the insertion process of the heat exchanger 2, and the sealing effect between the heat exchanger 2 and the bottom frame 11 can be ensured. Optionally, the seal is a high temperature resistant seal, which can maintain its elasticity and sealing performance in a high temperature environment, and avoid gas or liquid leakage at the connection between the end plate 21 and the insertion groove 101b.

[0057] The cover plate 12 is covered on the disassembly opening 102, so that the cover plate 12 can enclose the bottom frame 11 to form a space that encloses the burner 3, the combustion area, and the heat exchanger 2, etc., and can isolate the combustion area from other parts of the water heater to prevent heat leakage, reduce the impact of high temperature on other parts and the shell during the operation of the water heater, and avoid the overall temperature of the equipment from being too high, thereby increasing the service life. The cover plate 12 and the bottom frame 11 are detachably fixed. It can be understood that the cover plate 12 and the bottom frame 11 can be fixed by snap fastening, threaded connection, or some other fixing method that is easy to disassemble and assemble.

[0058] When the heat exchanger 2 needs to be repaired or overhauled, it is only necessary to remove the cover plate 12 so that the disassembly opening 102 is in an open state, and the heat exchanger 2 can be pulled out and disassembled from the installation cavity 101, and the heat exchanger 2 can be repaired, overhauled or replaced without removing other components such as the smoke hood. The operation process is simple and the installation is convenient.

[0059] It should be noted that in addition to the need to assemble the heat exchanger 2 during the production and manufacturing process of the gas water heater, it may still be necessary to disassemble and assemble the heat exchanger 2 after the gas water heater has been installed and used. Usually, the gas water heater is installed on a wall or other mounting surfaces for use. Then, in order to further improve the disassembly and assembly convenience of the heat exchanger 2, the disassembly and assembly port 102 can be set to face one side of the panel of the gas water heater, that is, the disassembly and assembly port 102 faces away from the mounting surface. In this way, both the covering direction of the cover plate 12 and the disassembly and assembly direction of the heat exchanger 2 can achieve the function of forward disassembly and assembly. Such a design can, on the one hand, simplify the disassembly and assembly operation of the heat exchanger 2, and on the other hand, reduce the lateral requirement for the installation space of the water heater.

[0060] In summary, in the gas water heater of the technical solution of the present utility model, by forming an installation cavity 101 and a disassembly and assembly port 102 communicating with the installation cavity 101 on the bottom frame 11, two insertion slots 101b communicating with the disassembly and assembly port 102 are provided on opposite sides of the installation cavity 101. During the installation process, the end plate 21 of the heat exchanger 2 can be directly inserted along the insertion slot 101b through the disassembly and assembly port 102, so that the heat exchange main body 22 is installed in the installation cavity 101 of the bottom frame 11. Then, the cover plate 12 is covered on the disassembly and assembly port 102 and fixed to the bottom frame 11 to complete the installation of the heat exchanger 2. This reduces the steps and time required for installing the heat exchanger 2; during the disassembly process, only need to open the cover plate 12, and the end plate 21 of the heat exchanger 2 can be directly pulled out from the insertion slot 101b through the disassembly and assembly port 102, without the need to remove other components such as the entire housing or the smoke hood. Such a design can simplify the assembly structure of the heat exchanger 2 and reduce the disassembly and assembly difficulty of the heat exchanger 2.

[0061] In addition, by making the opening width of the insertion slot 101b decrease from the disassembly and assembly port 102 in the direction away from the disassembly and assembly port 102; and the height dimension of the end plate 21 decrease from the direction close to the cover plate 12 in the direction away from the cover plate 12, it is more convenient for the end plate 21 to be inserted into the insertion slot 101b or pulled out from the insertion slot 101b, further improving the disassembly and assembly convenience of the heat exchanger 2.

[0062] In an embodiment of the present application, as Figure 3 、 Figure 5 and Figure 6 , the upper groove wall and / or the lower groove wall of the insertion slot 101b has a slope.

[0063] By setting the upper groove wall and / or the lower groove wall of the insertion groove 101b to have a slope, the upper groove wall and / or the lower groove wall form a guiding inclined surface. Such a design can play a guiding role in the insertion or removal process of the end plate 21. In practical application, the upper groove wall of the insertion groove 101b alone can have a slope, or the lower groove wall of the insertion groove 101b alone can have a slope, or both the upper groove wall and the lower groove wall of the insertion groove 101b can have a slope, as long as the opening width of the insertion groove 101b can be reduced from the disassembly port 102 toward the direction away from the cover plate 12.

[0064] In one embodiment of the present application, Figure 3 , Figure 5 as well as Figure 6 The upper end surface and / or the lower end surface of the end plate 21 has a slope.

[0065] By setting the upper end surface and / or lower end surface of the end plate 21 to have a slope, the upper end surface and / or lower end surface of the end plate 21 form a guiding inclined surface. Such a design can play a guiding role in the insertion or removal process of the end plate 21. In actual application, the upper end surface of a single end plate 21 may have a slope, or the lower end surface of a single end plate 21 may have a slope, or both the upper end surface and the lower end surface of the end plate 21 may have a slope. It should be noted that, since the heat exchanger 2 is inserted into the insertion slot 101b, the upper end surface of the end plate 21 cooperates with the upper slot wall of the insertion slot 101b, and the lower end surface of the end plate 21 cooperates with the lower slot wall of the insertion slot 101b. Preferably, when the upper end surface of the end plate 21 has a slope, the upper slot wall of the insertion slot 101b also has a slope, and the slopes of the two can match; when the lower end surface of the end plate 21 has a slope, the lower slot wall of the insertion slot 101b also has a slope, and the slopes of the two can match. Such an arrangement can improve the tightness of the fit between the end plate 21 and the insertion slot 101b.

[0066] Furthermore, if Figure 3 , Figure 5 as well as Figure 6 , a smooth transition area is formed at the connection between the groove wall of the insertion groove 101b away from the disassembly opening 102 and the upper groove wall of the insertion groove 101b, and / or a smooth transition area is formed at the connection between the groove wall of the insertion groove 101b away from the disassembly opening 102 and the lower groove wall of the insertion groove 101b;

[0067] The smooth transition area is configured as a concave arc surface, and two corners of the end of the end plate 21 away from the cover plate 12 are rounded structures.

[0068] It is understandable that the smooth transition region is located at one end of the insertion slot 101b away from the disassembly and assembly opening 102. The concave arc surface design of the smooth transition region can effectively disperse the stress at the connection, avoiding stress concentration on sharp corners or edges, thereby reducing the generation of cracks and improving the strength and durability of the overall structure. In actual application, it can be that only the connection between the slot wall of the insertion slot 101b away from the disassembly and assembly opening 102 and the upper slot wall of the insertion slot 101b forms a smooth transition region, or it can be that only the connection between the slot wall of the insertion slot 101b away from the disassembly and assembly opening 102 and the lower slot wall of the insertion slot 101b forms a smooth transition region, or it can be that smooth transition regions are formed at both upper and lower corners at one end of the insertion slot 101b away from the disassembly and assembly opening 102.

[0069] In addition, the two corners at one end of the end plate 21 away from the cover plate 12 are in a rounded corner structure, reducing the friction and resistance during installation, making it easier for the end plate 21 to slide into the insertion slot 101b, simplifying the installation process, reducing possible misoperations, and making the user more comfortable during the operation and installation process. And when there is a seal between the end plate 21 and the insertion slot 101b, the end plate 21 with a rounded corner structure will not scratch the seal during insertion, thus ensuring the sealing performance.

[0070] Furthermore, as Figures 1 to 6 , a first fastening member 13 is provided on the bottom frame 11, and a second fastening member 23 is provided on the heat exchanger 2. When the heat exchanger 2 is inserted into the installation cavity 101 through the disassembly and assembly opening 102, the second fastening member 23 is fastened and cooperated with the first fastening member 13. In this way, the limiting function of the heat exchanger 2 and the bottom frame 11 can be realized, without the need for manual limiting and positioning by the staff, which can further simplify the assembly operation and improve the assembly efficiency of the heat exchanger 2 and the bottom frame 11.

[0071] It is understandable that the specific structures of the first fastening member 13 and the second fastening member 23 can be determined according to the actual situation. For example, it can be a snap member and a snap groove, or it can be a hook and a hook, or it can be other fastening members, etc. The specific structure is not limited here. The specific positions of the first fastening member 13 and the second fastening member 23 can also be determined according to the actual situation. The first fastening member 13 can be arranged at a position on the bottom frame 11 away from the disassembly and assembly opening 102 or near the disassembly and assembly opening 102 or at the middle position, etc. Correspondingly, the second fastening member 23 can be arranged at a position on the heat exchanger 2 away from the cover plate 12 or near the cover plate 12 or at the middle position of the heat exchanger 2, etc. The specific installation positions are not limited here, as long as the second fastening member 23 is fastened and cooperated with the first fastening member 13 when the heat exchanger 2 is installed in the installation cavity 101.

[0072] As an example, the disassembly and assembly operations of the heat exchanger 2 are described as follows: When assembly is required, the heat exchanger 2 can be directly inserted into the installation cavity 101 of the bottom frame 11 from the disassembly and assembly port 102, and limited by buckling connection between the second buckling member 23 and the first buckling member 13. Then, the cover plate 12 is covered on the disassembly and assembly port 102 and fixed to the bottom frame 11 to complete the installation of the heat exchanger 2. When disassembly is required, the cover plate 12 can be removed from the disassembly and assembly port 102, and then the heat exchanger 2 is pulled out from the disassembly and assembly port 102 of the installation cavity 101. When pulling outwards, the second buckling member 23 can be driven to disengage from the first buckling member 13 without additional buckling release operation for the second buckling member 23 and the first buckling member 13, nor the need to disassemble other components such as the smoke hood. Thus, the disassembly and assembly steps of the heat exchanger 2 are simplified, and the operation convenience is improved.

[0073] In an embodiment of the present application, as Figure 3 and Figure 6 , the second buckling member 23 is buckled to the first buckling member 13 along the insertion direction of the heat exchanger 2.

[0074] By making the buckling direction of the second buckling member 23 and the first buckling member 13 consistent with the insertion direction of the heat exchanger 2, when the heat exchanger 2 is inserted into the installation cavity 101, the second buckling member 23 can be driven to move synchronously along its insertion direction. When the heat exchanger 2 is installed in place, the second buckling member 23 and the first buckling member 13 are buckled and matched. Thus, there is no need to specifically perform the buckling operation on the second buckling member 23 and the first buckling member 13, further simplifying the assembly steps.

[0075] Furthermore, as Figures 2 to 6 , the first buckling member 13 is provided at a position of the bottom frame 11 corresponding to at least one insertion slot 101b, and the second buckling member 23 is provided on at least one end plate 21.

[0076] The first buckling member 13 is provided at a position of the bottom frame 11 corresponding to at least one insertion slot 101b, and the second buckling member 23 is provided on at least one end plate 21, so that when the two end plates 21 are inserted along the insertion slot 101b, the second buckling member 23 can be driven to move in a direction away from the disassembly and assembly port 102. When the two end plates 21 are inserted in place, the second buckling member 23 is buckled to the first buckling member 13. Optionally, the first buckling member 13 can be provided at a position corresponding to one insertion slot 101b. Correspondingly, the second buckling member 23 is provided on one end plate 21 corresponding to the first buckling member 13; or the first buckling member 13 can be provided at positions corresponding to two insertion slots 101b. Correspondingly, the second buckling member 23 is provided on both end plates 21.

[0077] It can be understood that the specific positions of the first fastening member 13 and the second fastening member 23 can be determined according to the actual situation. As an example, the first fastening member 13 is located at one end of the insertion groove 101b close to the disassembly and assembly opening 102; the second fastening member 23 is located at one end of the end plate 21 close to the cover plate 12. With such an arrangement, during the insertion process of the end plate 21, the second fastening member 23 will be in a position outside the insertion groove 101b and will not interfere with the insertion process of the end plate 21. Thus, when the second fastening member 23 is fastened and cooperated with the first fastening member 13, the position is closer to the disassembly and assembly opening 102. Then, the first fastening member 13 can be set as a fastening groove structure at the position of the insertion groove 101b close to the disassembly and assembly opening 102, and the second fastening member 23 can be set as a buckle structure, making the insertion process more stable and reliable. At the same time, setting the buckle structure on the end plate 21 is not easy to deform, has higher structural strength, and higher assembly reliability.

[0078] In an embodiment of the present application, as Figure 1 , Figure 2 and Figure 4 , the bottom frame 11 includes a back plate 111, two side plates 112 and a top plate 113. The two side plates 112 are respectively connected to opposite sides of the back plate 111. The upper end of the back plate 111 protrudes from the side plates 112. The top plate 113 is connected to the upper end of the back plate 111 at an angle and is spaced from the side plates 112; the top plate 113, the two side plates 112 and the back plate 111 enclose an installation cavity 101, and the disassembly and assembly opening 102 is opposite to the back plate 111; the opposite side edges of the top plate 113, the opposite side edges of the back plate 111 and the upper edges of the two side plates 112 respectively enclose two insertion grooves 101b; the cover plate 12 is connected to the top plate 113 and the two side plates 112 to cover the disassembly and assembly opening 102.

[0079] This embodiment illustrates the structure of the bottom frame 11, and the back plate 111 and the two side plates 112 form a structure with a cross-sectional shape that is roughly "匚"-shaped, wherein the opening of the "匚"-shaped structure is the disassembly opening 102, and when the cover plate 12 is covered on the disassembly opening 102, it can cover the opening of the "匚"-shaped structure to form a structure with a cross-sectional shape that is roughly "口"-shaped. A top plate 113 is connected to the top of the back plate 111 at an angle, and it can be understood that the top plate 113 is located at the top of the "口"-shaped structure, and the top plate 113, the two side plates 112 and the back plate 111 enclose a mounting cavity 101, and the top plate 113 is spaced apart from the two side plates 112, so that the opposite side edges of the top plate 113, the opposite side edges of the back plate 111 and the upper edges of the two side plates 112 respectively enclose two insertion slots 101b. Thus, when the heat exchanger 2 is installed in the installation cavity 101, its two end plates 21 are respectively located in the two insertion slots 101b and are abutted and connected with the corresponding side edges of the top plate 113, the side edges of the back plate 111 and the upper edges of the corresponding side plates 112. At this time, the heat exchange body 22 is located at the lower side of the top plate 113, the front side of the back plate 111 and the upper area of ​​the two side plates 112.

[0080] In practical applications, the bottom frame 11 can be directly formed by bending a sheet metal plate into a back plate 111 and two side plates 112, which simplifies the manufacturing process and improves production efficiency. Optionally, the cover plate 12 and the top plate 113 and the two side plates 112 can be fixed by screws or buckles.

[0081] In one embodiment of the present application, Figure 1 , Figure 2 as well as Figure 4 The top plate 113 is concave inwardly in a direction away from the receiving groove 101a to form a smoke hood, and a smoke pipe 4 is provided on the top plate 113 to communicate with the mounting cavity 101. In this arrangement, there is no need to set up an additional smoke hood structure, and the top plate 113 is directly used to form the smoke hood structure and set the smoke pipe 4, which simplifies the structure and ensures smooth discharge of combustion exhaust gas.

[0082] Specifically, the back plate 111 includes a first back plate 111a and a second back plate 111b. The first back plate 111a is connected to two side plates 112 on opposite sides thereof, and is enclosed with the two side plates 112 and the cover plate 12 to form a combustion chamber. The second back plate 111b is arranged at the upper end of the first back plate 111a and protrudes from the side plates 112. The top plate 113 is connected to the upper end of the second back plate 111b. The top plate 113, the second back plate 111b and the two side plates 112 are enclosed to form a receiving groove 101a. The heat exchange body 22 is located between the second back plate 111b and the cover plate 12. The top plate 113 and the second back plate 111b are an integral structure, and the second back plate 111b and the first back plate 111a are an integral structure or a split structure.

[0083] It can be understood that the first back plate 111a is located below the heat exchanger 2, and the two side plates 112 are respectively connected to the opposite sides of the first back plate 111a. At this time, the first back plate 111a, the two side plates 112 and the cover plate 12 enclose a combustion chamber. The second back plate 111b is located above the first back plate 111a, corresponding to the heat exchange body 22 of the heat exchanger 2. The top plate 113 is connected to the upper edge of the second back plate 111b. The exhaust gas after heat exchange through the heat exchanger 2 can flow upward and be discharged through the smoke pipe 4 on the top plate 113. By setting the top plate 113 and the second back plate 111b as an integral structure, the smoke hood and the bottom frame 11 are combined into an integral modular structure. Such a design can facilitate componentized supply, reduce the installation steps of the smoke hood in the subsequent assembly workshop, and further improve the assembly efficiency and production efficiency of the gas water heater.

[0084] In actual application, the second back plate 111b and the first back plate 111a can be an integral structure or a split structure. When it is an integral structure, the bottom frame 11 and the smoke hood are an integral structure, which is more convenient for component supply and improves the assembly efficiency and production efficiency of the gas water heater; when it is a split structure, the second back plate 111b and the first back plate 111a can be disassembled and assembled, so more application methods can be provided, for example, a secondary heat exchanger (condensing heat exchanger) can be installed between the first back plate 111a and the second back plate 111b, or the first back plate 111a can be directly connected to the second back plate 111b to adapt to the application scenario when there is only one heat exchanger 2, etc. Optionally, the second back plate 111b and the first back plate 111a can be connected by screwing or riveting.

[0085] In order to improve the assembly reliability of the heat exchanger 2, as Figure 1 , Figures 3 to 6 In one embodiment, two opposite sides of the back plate 111 are provided with extension edges 1111, and the extension edges 1111 are provided with a first connection hole 103; an end of the end plate 21 away from the cover plate 12 is provided with a first flange 211, and the first flange 211 is provided with a second connection hole 201; when the end plate 21 is inserted into the insertion groove 101b, the second connection hole 201 is aligned with the first connection hole 103, and the heat exchanger 2 is fixed to the bottom frame 11 by fasteners that are sequentially penetrated through the second connection hole 201 and the first connection hole 103; wherein, the opening directions of the second connection hole 201 and the first connection hole 103 are consistent with the insertion direction of the heat exchanger 2.

[0086] With such a setting, when the end plate 21 is inserted into the insertion groove 101b, in addition to the second fastening member 23 and the first fastening member 13 being fastened and engaged to achieve pre-positioning of the heat exchanger 2 and the bottom frame 11, the first flanges 211 on both sides of the end plate 21 will abut against the extension edges 1111 on both sides of the back plate 111. At the same time, the second connection holes 201 on the first flanges 211 will be aligned with the first connection holes 103 on the extension edges 1111. The opening directions of the second connection holes 201 and the first connection holes 103 are the same as the insertion direction of the heat exchanger 2. Then, only by sequentially inserting fasteners along the insertion direction of the heat exchanger 2 into the second connection holes 201 and the first connection holes 103 can the heat exchanger 2 and the bottom frame 11 be fixed. In this way, the alignment and positioning process is simplified, making it easier to align the fasteners with the hole positions during the installation process. During assembly, it is not necessary to flip the bottom frame 11 and the heat exchanger 2. Only assembly needs to be carried out along the insertion direction of the heat exchanger 2, which is more convenient for automated production.

[0087] Further, as Figure 1 , Figures 3 to 6 , a second flange 212 is provided at one end of the end plate 21 close to the cover plate 12, and a third connection hole 202 is provided on the second flange 212; an avoidance opening 203 is provided at a position corresponding to the second connection hole 201 on the second flange 212; the cover plate 12 is provided with a fourth connection hole 104. When the cover plate 12 covers the disassembly and assembly opening 102, the fourth connection hole 104 is aligned with the third connection hole 202, and the cover plate 12 and the heat exchanger 2 are fixed by inserting a fastener through the fourth connection hole 104 and the third connection hole 202 at one time; wherein, the opening directions of the fourth connection hole 104 and the third connection hole 202 are the same as the insertion direction of the heat exchanger 2.

[0088] It can be understood that after the heat exchanger 2 is installed in the installation cavity 101 and fixed to the bottom frame 11, the cover plate 12 needs to be covered to cover the disassembly opening 102. In this embodiment, by setting a second flange 212 at one end of the end plate 21 close to the cover plate 12, when the cover plate 12 is covered on the disassembly opening 102, the inner wall of the cover plate 12 will abut against the second flange 212, and at the same time, the fourth connection hole 104 on the cover plate 12 can be aligned with the third connection hole 202 on the second flange 212, and the opening direction of the fourth connection hole 104 and the third connection hole 202 is consistent with the insertion direction of the heat exchanger 2, then the cover plate 12 and the heat exchanger 2 can be fixed by only inserting the fasteners in the fourth connection hole 104 and the third connection hole 202 in sequence along the insertion direction of the heat exchanger 2, thus simplifying the alignment and positioning process, so that the fasteners can be more easily aligned with the hole position during the installation process. By setting the avoidance opening 203 at the position of the second flange 212 corresponding to the second connecting hole 201, the second flange 212 will not interfere with the assembly of the heat exchanger 2 and the base frame 11. During assembly, there is no need to flip the base frame 11 and the heat exchanger 2. Only the assembly along the insertion direction of the heat exchanger 2 is required, which is more convenient for automated production.

[0089] In actual application, in addition to the fourth connection hole 104 that matches the heat exchanger 2, the cover plate 12 will also be provided with other connection holes that match the bottom frame 11. The other connection holes are preferably set to the same structure as the fourth connection hole 104, and can be fixed with the same type of fasteners to improve production efficiency. It can be understood that when the cover plate 12 covers the disassembly opening 102, the upper edge of the cover plate 12 is connected to the top plate 113, the two side edges of the cover plate 12 are connected to the two side plates 112, and the lower edge of the cover plate 12 is connected to the bottom plate 114 (opposite to the top plate 113) of the bottom frame 11. At this time, multiple connection holes can be set on the cover plate 12 to be fixed to the top plate 113, the side plates 112 and the bottom plate 114 through fasteners.

[0090] Furthermore, if Figure 1 , Figures 3 to 4 A third flange 1131 is provided at one end of the top plate 113 away from the back plate 111 ; a guide flange 121 bent toward the top plate 113 is provided on the upper edge of the cover plate 12 , and the guide flange 121 is buckled to the third flange 1131 .

[0091] In this embodiment, the guiding flanging 121 can play a role in assembly guiding. During assembly, the guiding flanging 121 of the cover plate 12 can first be buckled to the third flanging 1131, and then the third flanging 1131 and the top plate 113 can be pulled towards the direction of the bottom plate 114 until the two sides of the cover plate 12 cover the two side plates 112 respectively and the lower side covers the bottom plate 114, without the need to press the two side plates 112 by hand. The connection holes on the cover plate 12 are aligned with the connection holes on the bottom frame 11, and then fixed by fasteners. In this way, during assembly, it is not necessary to flip the cover plate 12, the bottom frame 11 and the heat exchanger 2, and only the assembly can be carried out along the insertion direction of the heat exchanger 2, which is more convenient for automated production. Optionally, the fasteners can be screws or rivets.

[0092] In an embodiment of the present application, as Figure 4 , Figure 5 and Figure 7 , the gas water heater further includes a burner 3. Guide ribs 115 are provided on the inner wall surface of the bottom frame 11, and the burner 3 is inserted into the installation cavity 101 along the guide ribs 115 through the disassembly and assembly port 102. Such a setting facilitates the installation of the burner 3 and better realizes the one-time positioning function.

[0093] Optionally, the guide ribs 115 are a profiled structure on the bottom frame 11, which is convenient for forming and manufacturing.

[0094] Furthermore, the depth dimension of the guide ribs 115 relative to the inner wall surface of the bottom frame 11 is 1.5 mm to 3 mm.

[0095] It can be understood that the depth dimension of the guide ribs 115 relative to the inner wall surface of the bottom frame 11 should not be too small or too large. If it is too small, it will not play a guiding and limiting role; if it is too large, it may affect the internal space of the bottom frame 11 and the installation space of the burner 3. Based on this, in this embodiment, the depth dimension of the guide ribs 115 relative to the inner wall surface of the bottom frame 11 is 1.5 mm to 3 mm, which ensures a good limiting and guiding effect while not occupying the combustion chamber space.

[0096] Optionally, the depth dimension of the guide ribs 115 relative to the inner wall surface of the bottom frame 11 can be selected as 1.5 mm, 1.8 mm, 2 mm, 2.3 mm, 2.5 mm, 2.8 mm or 3 mm, etc.

[0097] 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 directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A gas water heater, characterized in that: include: The bottom frame is formed with an installation cavity and a disassembly opening communicating with the installation cavity, and two insertion grooves communicating with the disassembly opening are provided on opposite sides of the installation cavity; A heat exchanger, comprising two end plates and a heat exchange main body installed between the two end plates, the two end plates are correspondingly inserted into the two insertion slots through the disassembly and assembly openings, and the heat exchange main body is installed in the installation cavity; as well as A cover plate, which covers the disassembly opening and is detachably fixed to the bottom frame; The opening width of the insertion slot decreases from the disassembly and assembly opening toward the direction away from the disassembly and assembly opening; the height dimension of the end plate decreases from the direction close to the cover plate toward the direction away from the cover plate.

2. The gas water heater according to claim 1, characterized in that: The upper slot wall and / or the lower slot wall of the insertion slot has a slope; The upper end surface and / or the lower end surface of the end plate has a slope.

3. The gas water heater according to claim 2, characterized in that: A smooth transition area is formed at the connection between the slot wall of the insertion slot away from the assembly and disassembly opening and the upper slot wall of the insertion slot, and / or a smooth transition area is formed at the connection between the slot wall of the insertion slot away from the assembly and disassembly opening and the lower slot wall of the insertion slot; The smooth transition area is arranged in a concave arc surface, and two corners of one end of the end plate away from the cover plate are rounded structures.

4. The gas water heater according to any one of claims 1 to 3, characterized in that: The end plate and the slot wall of the insertion slot are sealed and connected via a sealing member.

5. The gas water heater according to any one of claims 1 to 3, characterized in that: A first fastener is provided at a position of the bottom frame corresponding to at least one of the insertion slots, and a second fastener is provided at least one of the end plates. The second fastener is used to fasten and cooperate with the first fastener when the heat exchange body is installed in the installation cavity.

6. The gas water heater according to claim 5, characterized in that: The first fastening member is located at one end of the insertion slot close to the disassembly opening; the second fastening member is located at one end of the end plate close to the cover plate.

7. The gas water heater according to any one of claims 1 to 3, characterized in that: The bottom frame includes a back plate, two side plates and a top plate, the two side plates are respectively connected to opposite sides of the back plate, the upper end of the back plate protrudes from the side plates, the top plate is connected to the upper end of the back plate at an angle and is spaced apart from the side plates; The top plate, the two side plates and the back plate enclose the installation cavity, and the disassembly opening is opposite to the back plate; The opposite side edges of the top plate, the opposite side edges of the back plate and the upper edges of the two side plates respectively enclose and form two insertion slots; The cover plate is connected to the top plate and the two side plates to cover the disassembly and assembly opening.

8. The gas water heater according to claim 7, characterized in that: The top plate is concave inwardly in a direction away from the installation cavity to form a smoke cover, and a smoke pipe connected to the installation cavity is provided on the top plate; The back plate includes a first back plate and a second back plate arranged above the first back plate, two sides of the first back plate are connected to the two side plates, and the upper edge of the second back plate is connected to the top plate; The top plate and the second back plate are an integral structure, and the second back plate and the first back plate are an integral structure or a split structure.

9. The gas water heater according to claim 7, characterized in that: The back plate is provided with extended edges on two opposite sides, and the extended edges are provided with first connecting holes; The end of the end plate facing away from the cover plate is provided with a first flange, and the first flange is provided with a second connection hole; when the end plate is inserted into the insertion slot, the second connection hole is aligned with the first connection hole; Wherein, the opening directions of the second connecting hole and the first connecting hole are consistent with the insertion direction of the heat exchanger; A second flange is provided at one end of the end plate close to the cover plate, and a third connecting hole is provided at the second flange; and a relief opening is provided at a position of the second connecting hole corresponding to the second flange; The cover plate is provided with a fourth connection hole, and when the cover plate is covered on the disassembly opening, the fourth connection hole is aligned with the third connection hole; Wherein, the opening directions of the fourth connecting hole and the third connecting hole are consistent with the insertion direction of the heat exchanger.

10. The gas water heater according to any one of claims 1 to 3, characterized in that: The gas water heater further comprises a burner, the inner wall surface of the bottom frame is provided with guide ribs, and the burner is inserted into the installation cavity along the guide ribs through the disassembly opening; The depth dimension of the guide rib relative to the inner wall surface of the bottom frame is 1.5 mm to 3 mm.

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