Shell structure of gas water heater and gas water heater

Abstract

The utility model provides a gas water heater shell structure and a gas water heater, the gas water heater shell structure comprises a face shell assembly and a back plate assembly, and the face shell assembly and the back plate assembly are matched to form a cavity for containing a water heater machine core. A first clamping piece is arranged at the bottom of the back plate assembly and located in the cavity; a second clamping piece is arranged at the bottom of the surface shell assembly and is positioned in the cavity; the first clamping piece and the second clamping piece are clamped with each other, and the top of the face shell assembly is fixedly connected with the top of the back plate assembly through a fastener. According to the gas water heater shell structure, the stability of the water heater shell structure is guaranteed, meanwhile, the defect that in the prior art, a gas water heater shell is complex to assemble is overcome, and mounting and dismounting are convenient.

Description

Technical Field

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

[0002] The shell of a gas water heater mainly includes a front shell and a back plate, which are used to accommodate the internal structure of the gas water heater. Usually, the gas water heater is fixed to a wall during installation, and during use, its front shell occasionally needs to be disassembled and reinstalled for maintenance and inspection of the gas water heater. In the prior art, the front shell and the back plate of the gas water heater are often connected by screws at both the top and the bottom. However, this assembly method is relatively difficult to install, and it is difficult to position the front shell and the back plate when screwing in the screws. The sealing performance of the box after installation is also easily affected by structural deformation. In another prior art, there is also a design in which the front shell and the back plate of the gas water heater are first positioned by several snap fasteners on the side and the top, and then fixedly connected by screws at the bottom. However, its structure and connection method are still relatively complex, the installation is cumbersome, and the maintenance cost is increased. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the defect of complex assembly of the shell of a gas water heater in the prior art and ensure the stability of the shell structure of the water heater, and provide a shell structure of a gas water heater and a gas water heater.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A shell structure of a gas water heater includes a front shell assembly and a back plate assembly. The front shell assembly and the back plate assembly cooperate to form a chamber for accommodating a water heater core. A first clamping member is provided at the bottom of the back plate assembly and is located inside the chamber; a second clamping member is provided at the bottom of the front shell assembly and is located inside the chamber; the first clamping member and the second clamping member are clamped with each other, and the top of the front shell assembly and the top of the back plate assembly are fixedly connected by fasteners.

[0006] In this solution, the shell structure of the gas water heater is positioned by respectively providing a first clamping member and a second clamping member at the bottoms of the back plate assembly and the front shell assembly and clamping them with each other, so as to facilitate the initial cooperation to form a chamber for accommodating the water heater core; in addition, by fixedly connecting the top of the front shell assembly and the top of the back plate assembly with fasteners, while ensuring the stability of the shell structure of the water heater, the shell of the gas water heater is more convenient to assemble, and the difficulty of maintaining and repairing the water heater core is reduced.

[0007] Preferably, the back panel assembly includes a first bottom wall and a back wall, and the first bottom wall is connected to the bottom of the back wall;

[0008] The front shell assembly includes a bottom edge and a front mask. The front mask is a cover body structure with side walls. The bottom edge extends towards the interior of the chamber, and the bottom edge is connected to the bottom of the front mask;

[0009] An upwardly protruding first guide rail is provided at the edge of the first bottom wall, and an upwardly protruding second guide rail is provided at the edge of the bottom edge. The second guide rail is located on the outer edge of the first guide rail;

[0010] The first engaging member is arranged inside the first guide rail, and the second engaging member is arranged on the second guide rail. The engaging directions of the first engaging member and the second engaging member are the same as the guiding direction of the guide rail.

[0011] In this solution, by adopting the above structural form, the first guide rail and the second guide rail in the gas water heater housing structure play an effect of assisting in positioning the front shell assembly and the back panel assembly during installation, and make it easier for the first engaging member and the second engaging member to engage with each other, reducing the installation difficulty of the gas water heater housing.

[0012] Preferably, the first engaging members are arranged on both sides of the first bottom wall, and the second engaging members are arranged on both sides of the bottom edge.

[0013] In this solution, by specifying the positions of the first engaging member and the second engaging member on the first bottom wall and the bottom edge, the first bottom wall and the bottom edge have mating parts on both side edges, and the positioning of both side edges can be completed at one time through sliding fit. While ensuring the connection strength between the front shell assembly and the back panel assembly, the installation convenience of the gas water heater housing structure is guaranteed.

[0014] Preferably, the first engaging member is a clamping plate, and the clamping plate forms an angle with the side edge of the first guide rail; the second engaging member includes a clamping groove, the direction of the clamping groove is the same as the guiding direction of the first guide rail, and the groove opening faces downward; the height of the clamping plate is higher than that of the clamping groove.

[0015] In this solution, by adopting the above structural form, the groove opening of the clamping groove restricts the backward movement of the clamping plate in the guiding direction of the guide rail, and further fixes the front shell assembly and the back panel assembly to each other on the basis that the above-mentioned guide rail design makes it easier for them to be mated and positioned, facilitating the assembly of the gas water heater housing.

[0016] Preferably, a support member is provided on the upper surface of the first bottom wall, and the support member includes the clamping plate, a first connecting wall, a second connecting wall and a supporting wall, the first connecting wall is fixedly connected to the first bottom wall, and the second connecting wall is fixedly connected to the back wall;

[0017] The second clamping member extends upward from the bottom edge for a preset distance and then bends to form the clamping slot.

[0018] In this solution, the gas water heater housing structure uses the first connecting wall and the second connecting wall to stably connect the support member to the back plate assembly, and the top of the support wall can support the weight of the water heater core and strengthen the structural strength of the bottom of the back plate assembly. The bending structure of the second clamping member is easy to process and can cooperate with the clamping plate, making the gas water heater housing easier to assemble.

[0019] Preferably, the back panel assembly comprises a first top wall and a back wall, wherein the first top wall is connected to the top of the back wall;

[0020] The face shell assembly includes a second top wall and a face mask, the face mask is a cover structure with side walls, and the second top wall is connected to the top of the face mask;

[0021] The second top wall is disposed above the first top wall and covers an outer edge of the first top wall.

[0022] In this solution, the gas water heater shell structure sets the second top wall above the first top wall and covers the outer edge of the first top wall, so that the surface shell assembly can achieve the rainproof function when the gas water heater is installed outdoors, preventing rainwater from penetrating into the joint between the surface shell assembly and the top of the back plate assembly. At the same time, the above structural design also conforms to the installation mode of the gas water heater shell structure, can simultaneously constrain the top wall and the bottom clamping parts, and more easily achieve the positioning between the surface shell assembly and the back plate assembly, making the gas water heater shell easier to assemble.

[0023] Preferably, the back wall is provided with a plurality of exhaust holes which are concave toward the inside of the chamber and open upward, and the back wall is provided with a water baffle on the side facing the mask, the opening of the water baffle is upward, and the water baffle and the back wall together form a chamber for accommodating the exhaust holes; the lower end of the water baffle is fixed to the back wall.

[0024] In this solution, the gas water heater shell structure is provided with the exhaust hole so that the back plate assembly can realize the rainproof function when the gas water heater is installed outdoors. The water baffle can play the role of water blocking when a small amount of rainwater enters the exhaust hole, and can reduce the combustion noise of the whole water heater in use by guiding the intake air.

[0025] Preferably, the top of the back wall has a protruding plate higher than the edge of the first top wall, and the second top wall has a mating portion covering the upper part of the protruding plate at the corresponding position of the protruding plate, and the protruding plate and the mating portion are fitted together by screws.

[0026] In this solution, by adopting the above structural form, the back plate assembly and the front shell assembly are further fixedly fitted after being positioned by the clamping parts at the bottom, so as to ensure the connection stability of the gas water heater shell structure. At the same time, since the front shell assembly has been positioned and only the top of the whole shell needs to be fixed and fitted with screws, the effect of facilitating assembly is achieved.

[0027] Preferably, the shape of the joint between the second top wall and the first top wall is concave, and a smoke exhaust pipe hole is centrally arranged on the first top wall, and the diameter of the smoke exhaust pipe hole is matched with the smoke exhaust pipe.

[0028] In this solution, by making the shape of the joint between the second top wall and the first top wall concave, the front shell assembly can be ensured to receive the rainwater above to the greatest extent when the gas water heater is installed outdoors, and prevent it from entering the interior and damaging the water heater core.

[0029] Preferably, the second top wall also has symmetric concave pressings.

[0030] In this solution, the gas water heater shell structure ensures the sheet metal strength and flatness through the concave pressings, thereby increasing the tightness of the gas water heater shell structure.

[0031] Preferably, the exhaust holes are arranged along the vertical direction of the back wall, divided into several groups at intervals, and the widths of the exhaust holes in each group are the same.

[0032] A gas water heater includes the gas water heater shell structure as described above.

[0033] The positive and progressive effects of the present utility model are as follows: by respectively arranging a first clamping part and a second clamping part at the bottoms of the back plate assembly and the front shell assembly and making them clamp each other, the back plate assembly and the front shell assembly are positioned, which is convenient for initially fitting to form a chamber for accommodating the water heater core; in addition, by fixedly connecting the two at the top of the front shell assembly and the top of the back plate assembly with fasteners, while ensuring the stability of the water heater shell structure, the gas water heater shell is more convenient for assembly, and the difficulty of repairing and maintaining the water heater core is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is an exploded view of the gas water heater shell according to the embodiment of the present utility model.

[0035] Figure 2 The sectional view structure diagram of the outer shell of the gas water heater after removing the face mask in the embodiment of the present utility model.

[0036] Figure 3 The top view of the sectional view structure of the outer shell of the gas water heater in the embodiment of the present utility model.

[0037] Figure 4 The structural schematic diagram of the first clamping member and the second clamping member in the embodiment of the present utility model.

[0038] Figure 5 The structural schematic diagram of the second clamping member in the embodiment of the present utility model.

[0039] Figure 6 The structural schematic diagram of the exhaust hole and the water baffle in the embodiment of the present utility model.

[0040] Figure 7 The structural schematic diagram of the front shell assembly in the embodiment of the present utility model.

[0041] Explanation of the reference numerals:

[0042] Front shell assembly 1

[0043] Back panel assembly 2

[0044] First clamping member 3

[0045] Second clamping member 4

[0046] First bottom wall 5

[0047] Back wall 6

[0048] Bottom edge 7

[0049] Face mask 8

[0050] Side wall 9

[0051] First guide rail 10

[0052] Second guide rail 11

[0053] Clamping plate 12

[0054] Clamping groove 13

[0055] Supporting member 14

[0056] First connecting wall 15

[0057] Second connecting wall 16

[0058] Supporting wall 17

[0059] First top wall 18

[0060] Second top wall 19

[0061] Exhaust hole 20

[0062] Water baffle 21

[0063] Protruding plate 22

[0064] Fitting part 23

[0065] Smoke exhaust pipe hole 24

[0066] Concave pressing type 25

[0067] Wall hanging rack 26 Specific implementation mode

[0068] A preferred embodiment is given below and the accompanying drawings are used to more clearly and completely illustrate the present utility model.

[0069] Embodiment

[0070] As Figure 1 shown, this embodiment provides a gas water heater shell structure, which is applicable to ordinary household gas water heaters. The gas water heater shell structure includes a front shell assembly 1 and a back shell assembly 2. The front shell assembly 1 and the back shell assembly 2 cooperate to form a chamber for accommodating the water heater core. The chamber can be in the shape of a hollow cuboid.

[0071] A first clamping member 3 is provided at the bottom of the back shell assembly 2 and is located inside the chamber; a second clamping member 4 is provided at the bottom of the front shell assembly 1 and is located inside the chamber; the first clamping member 3 and the second clamping member 4 are clamped with each other, and the top of the front shell assembly 1 and the top of the back shell assembly 2 are fixedly connected by fasteners. For example, the fasteners can be screws. The back shell assembly 2 can be fixed on the wall through the wall hanging rack 26. The wall hanging rack 26 can be a bending member fixed to the top and bottom of the back shell assembly 2 by screws, or can be integrally formed with the back shell assembly 2.

[0072] In this embodiment, the gas water heater shell structure positions the back shell assembly 2 and the front shell assembly 1 by respectively providing the first clamping member 3 and the second clamping member 4 at the bottoms of the back shell assembly 2 and the front shell assembly 1 and making them clamp with each other, so as to facilitate the preliminary cooperation to form a chamber for accommodating the water heater core; in addition, by fixedly connecting the two at the top of the front shell assembly 1 and the top of the back shell assembly 2 with fasteners, while ensuring the stability of the gas water heater shell structure, the gas water heater shell is more convenient to assemble, and the difficulty of maintaining and repairing the water heater core is reduced.

[0073] As Figure 1 shown, the back shell assembly 2 includes a first bottom wall 5 and a back wall 6, and the first bottom wall 5 is connected to the bottom of the back wall 6;

[0074] As Figure 7As shown, the front shell assembly 1 includes a bottom edge 7 and a face mask 8. The face mask 8 is a cover structure with side walls 9, and the side walls 9 abut against both sides of the back wall 6 when the assembly is completed; the bottom edge 7 extends towards the interior of the chamber, and the bottom edge 7 is connected to the bottom of the face mask 8;

[0075] As Figure 3 shown, a first guide rail 10 protruding upwards is provided at the edge of the first bottom wall 5. The shape of the first guide rail 10 can be a U shape with circular chamfers at two top corners. A second guide rail 11 protruding upwards is provided at the edge of the bottom edge 7. The second guide rail 11 is located on the outer edge of the first guide rail 10, and the shapes of the first guide rail 10 and the second guide rail 11 can be the same, and they can fit together in the guiding direction, making the sealing performance at the bottom of the gas water heater shell better and improving the sound insulation effect;

[0076] The first clamping member 3 is arranged inside the first guide rail 10, the second clamping member 4 is arranged on the second guide rail 11, the clamping directions of the first clamping member 3 and the second clamping member 4 are the same as the guiding direction of the guide rail, and the clamping positions are on the outer edge of the first guide rail 10.

[0077] In this embodiment, by adopting the above structural form for the gas water heater shell structure, the first guide rail 10 and the second guide rail 11 play an effect of assisting in positioning the front shell assembly 1 and the back plate assembly 2 during installation, and make it easier for the first clamping member 3 and the second clamping member 4 to be clamped with each other, reducing the installation difficulty of the gas water heater shell.

[0078] As Figure 2 and Figure 7 shown, the first clamping members 3 are arranged on both sides of the first bottom wall 5, and the second clamping members 4 are arranged on both sides of the bottom edge 7. In this embodiment, only one clamping member is arranged on both sides of the first bottom wall 5 and both sides of the bottom edge 7, and the positions of the two first clamping members 3 can correspond to each other, and the positions of the two second clamping members 4 can correspond to each other.

[0079] In this embodiment, by specifying the positions of the first clamping member 3 and the second clamping member 4 on the first bottom wall 5 and the bottom edge 7, the first bottom wall 5 and the bottom edge 7 have mating parts 23 on both side edges, and the positioning of both side edges can be completed at one time through sliding fit. While ensuring the connection strength between the front shell assembly 1 and the back plate assembly 2, the installation convenience of the gas water heater shell structure is guaranteed.

[0080] As Figure 4-5As shown, the first engaging member 3 is an engaging plate 12. The engaging plate 12 forms an angle with the side of the first guiding rail 10, and its shape is a rectangle with a chamfer. The chamfer is located on one side that engages with the engaging groove 13 and the top of the engaging plate 12. This is to enable the part of the engaging plate 12 above the engaging groove 13 to slide out of the engaging groove 13 more easily during assembly; the second engaging member 4 includes an engaging groove 13. The direction of the engaging groove 13 is the same as the guiding direction of the first guiding rail 10, and the notch is downward; the height of the engaging plate 12 is higher than that of the engaging groove 13, and the width of the engaging groove 13 is not less than the sum of the thickness of the engaging plate 12 and the thickness of the first guiding rail 10.

[0081] In this embodiment, the gas water heater housing structure adopts the above structural form, so that the notch of the engaging groove 13 restricts the backward movement of the engaging plate 12 in the guiding rail direction. On the basis that the aforementioned guiding rail design makes it easier for the front shell assembly 1 and the back panel assembly 2 to be fitted and positioned, the two are further fixed to each other, facilitating the assembly of the gas water heater housing.

[0082] As Figure 4 shown, a support member 14 is provided on the upper surface of the first bottom wall 5. The support member 14 includes an engaging plate 12, a first connecting wall 15, a second connecting wall 16, and a support wall 17. The first connecting wall 15 is fixedly connected to the first bottom wall 5, and the second connecting wall 16 is fixedly connected to the back wall 6; the support wall 17 can be a bent plate portion perpendicular to the first bottom wall 5, and the second connecting wall 16 can be two protruding plate portions 22 formed by bending the first connecting wall 15 and the support wall 17 at the joint with the back wall 6.

[0083] The second engaging member 4 extends upward a preset distance from the bottom edge 7 and then bends to form the engaging groove 13. The second engaging member 4 can have a chamfer, and the chamfer is located on the side near the engaging part and the bottom of the second engaging member 4, making it easier for the second engaging member 4 and the first engaging member 3 to slide to the positioning state during assembly.

[0084] In this embodiment, the gas water heater housing structure enables the support member 14 to be stably connected to the back panel assembly 2 through the first connecting wall 15 and the second connecting wall 16, and the top of the support wall 17 can support the weight of the water heater movement, strengthening the structural strength at the bottom of the back panel assembly 2. The bending structure of the second engaging member 4 is easy to process and can cooperate with the engaging plate 12, making it easier to assemble the gas water heater housing.

[0085] As Figure 1 shown, the back panel assembly 2 includes a first top wall 18 and a back wall 6, and the first top wall 18 is connected to the top of the back wall 6;

[0086] The front shell assembly 1 includes a second top wall 19 and a face mask 8. The face mask 8 is a cover structure with side walls 9, and the second top wall 19 is connected to the top of the face mask 8;

[0087] The second top wall 19 is disposed above the first top wall 18 and covers the outer edge of the first top wall 18.

[0088] In this embodiment, in the gas water heater housing structure, by disposing the second top wall 19 above the first top wall 18 and covering the outer edge of the first top wall 18, the front shell assembly 1 can achieve a rain shielding function when the gas water heater is installed outdoors, preventing rainwater from seeping into the joint between the front shell assembly 1 and the top of the back plate assembly 2. At the same time, adopting the above structural design also conforms to the installation mode of the gas water heater housing structure, can simultaneously restrain the top wall and the bottom fasteners, and is more likely to realize the positioning between the front shell assembly 1 and the back plate assembly 2, making the gas water heater housing easier to assemble.

[0089] As Figure 6 shown, a plurality of exhaust holes 20 that are concave inward into the chamber and have openings facing upward are provided on the back wall 6. A water baffle 21 is provided on the side of the back wall 6 facing the face mask 8. The opening of the water baffle 21 faces upward, and the water baffle 21 and the back wall 6 together enclose a chamber for accommodating the exhaust holes 20; the lower end of the water baffle 21 is fixed to the back wall 6, and the fixing method can be screw connection or welding.

[0090] In this embodiment, in the gas water heater housing structure, through the arrangement of the exhaust holes 20, the back plate assembly 2 can achieve a rain shielding function when the gas water heater is installed outdoors. The water baffle 21 can play a role in blocking water when a small amount of rainwater enters the exhaust holes 20, and can achieve the effect of reducing the combustion noise of the whole water heater during use by guiding the intake air.

[0091] As Figure 1 shown, a protruding plate 22 higher than the edge of the first top wall 18 is provided at the top of the back wall 6, and the second top wall 19 has a mating portion 23 covering above the protruding plate 22 at the corresponding position of the protruding plate 22. The protruding plate 22 and the mating portion 23 are fitted together by screws. Specifically, the combination of the protruding plate 22 and the mating portion 23 is at least two or more, and is symmetrically distributed on both sides of the wall hanging bracket 26.

[0092] In this embodiment, in the gas water heater housing structure, by adopting the above structural form, after the back plate assembly 2 and the front shell assembly 1 are positioned by the bottom fasteners, they are further fixedly fitted, so as to ensure the connection stability of the gas water heater housing structure. At the same time, since the front shell assembly 1 has been positioned and only the top of the housing needs to be fixedly fitted with screws as a whole, the effect of facilitating assembly is achieved.

[0093] As Figure 1As shown, the shape of the joint between the second top wall 19 and the first top wall 18 is concave. A smoke exhaust pipe hole 24 is centrally arranged on the first top wall 18, and the diameter of the smoke exhaust pipe hole 24 matches that of the smoke exhaust pipe. The shape of the concave part can be trapezoidal, and the long side of the trapezoidal first top wall 18 is connected to the top side of the back wall 6.

[0094] In this embodiment, the gas water heater shell structure makes the shape of the joint between the second top wall 19 and the first top wall 18 concave, so as to ensure to the greatest extent that the front shell assembly 1 can receive the rainwater above when the gas water heater is installed outdoors and prevent it from entering the interior and damaging the water heater core.

[0095] As Figure 1 and Figure 7 shown, the second top wall 19 also has symmetric concave pressings 25, and the depression depth of the concave pressings 25 can be the same as that of the trapezoidal concave at the joint.

[0096] In this embodiment, the gas water heater shell structure ensures the sheet metal strength and flatness through the concave pressings 25, thereby increasing the tightness of the gas water heater shell structure.

[0097] As Figure 1 shown, the exhaust holes 20 are arranged along the vertical direction of the back wall 6 and are divided into several groups at intervals, and the widths of the exhaust holes 20 in each group are the same.

[0098] A gas water heater includes the gas water heater shell structure as above.

[0099] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only for illustration. The protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A gas water heater housing structure, comprising a front shell assembly and a back plate assembly, wherein the front shell assembly cooperates with the back plate assembly to form a chamber to accommodate a water heater core, characterized in that: A first clamping piece is provided at the bottom of the back panel assembly and is located in the chamber; a second clamping piece is provided at the bottom of the face shell assembly and is located in the chamber; the first clamping piece and the second clamping piece are clamped with each other, and the top of the face shell assembly and the top of the back panel assembly are fixedly connected by fasteners.

2. The gas water heater housing structure according to claim 1, characterized in that: The back plate assembly includes a first bottom wall and a back wall, wherein the first bottom wall is connected to the bottom of the back wall; The face shell assembly includes a bottom edge and a mask, the mask is a cover structure with a side wall, the bottom edge extends toward the interior of the chamber, and the bottom edge is connected to the bottom of the mask; The edge of the first bottom wall is provided with a first guide rail protruding upward, the edge of the bottom edge is provided with a second guide rail protruding upward, and the second guide rail is located at the outer edge of the first guide rail; The first clamping member is arranged at the inner side of the first guide rail, the second clamping member is arranged on the second guide rail, and the clamping direction of the first clamping member and the second clamping member is consistent with the guiding direction of the guide rail.

3. The gas water heater housing structure according to claim 2, characterized in that: The first clamping parts are arranged on both sides of the first bottom wall, and the second clamping parts are arranged on both sides of the bottom edge.

4. The gas water heater housing structure according to claim 2, characterized in that: The first clamping member is a clamping plate, which forms an angle with the side of the first guide rail; the second clamping member includes a clamping groove, the direction of the clamping groove is consistent with the guiding direction of the first guide rail, and the groove is downward; the height of the clamping plate is higher than the clamping groove.

5. The gas water heater housing structure according to claim 4, characterized in that: A support member is provided on the upper surface of the first bottom wall, and the support member includes the clamping plate, a first connecting wall, a second connecting wall and a supporting wall, the first connecting wall is fixedly connected to the first bottom wall, and the second connecting wall is fixedly connected to the back wall; The second clamping member extends upward from the bottom edge for a preset distance and then bends to form the clamping slot.

6. The gas water heater housing structure according to claim 1, characterized in that: The back plate assembly includes a first top wall and a back wall, wherein the first top wall is connected to the top of the back wall; The face shell assembly includes a second top wall and a face mask, the face mask is a cover structure with side walls, and the second top wall is connected to the top of the face mask; The second top wall is disposed above the first top wall and covers an outer edge of the first top wall.

7. The gas water heater housing structure according to claim 6, characterized in that: The back wall is provided with a plurality of exhaust holes which are concave toward the inside of the chamber and open upwards. The back wall is provided with a water baffle on the side facing the mask. The opening of the water baffle faces upwards, and the water baffle and the back wall together form a chamber for accommodating the exhaust holes. The lower end of the water baffle is fixed to the back wall.

8. The shell structure of the gas water heater according to claim 6, characterized in that: The top of the back wall has a protruding plate higher than the edge of the first top wall, and the second top wall has a matching part covering the top of the protruding plate at a corresponding position of the protruding plate, and the protruding plate and the matching part are matched by screws.

9. The gas water heater housing structure according to claim 6, characterized in that: The shape of the joint between the second top wall and the first top wall is concave, and a smoke exhaust pipe hole is centrally arranged on the first top wall, and the diameter of the smoke exhaust pipe hole matches the smoke exhaust pipe; And / or, the second top wall also has a symmetrical concave pressure profile.

10. A gas water heater, characterized in that: The gas water heater comprises a gas water heater shell structure as claimed in any one of claims 1 to 9.

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