Water heater shell assembly and gas water heater

Abstract

The utility model relates to the technical field of kitchen appliances, and discloses a water heater shell assembly, which comprises a main shell, a water heater, a water heater and a water heater, a connecting plate is formed on the edge of the edge covering plate; the edge of the bottom shell plate is sunken to form a positioning groove for the connecting plate to be adaptively clamped for pre-positioning; and the connecting plate is clamped and welded with the positioning groove, so that the bottom shell plate and the edge covering plate are mutually connected and enclosed to form an accommodating cavity with a packaging opening at one end. The connecting plate and the positioning groove are arranged, pre-positioning of the bottom shell plate and the edge covering plate is achieved, on the basis of clamping connection, the connecting plate and the positioning groove are integrally connected through welding, a stable and sealed containing cavity is formed, clamping positioning is conducted through the positioning groove and the connecting plate, the requirement for manual alignment can be reduced, and the assembling efficiency is improved.

Description

Technical Field

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

[0002] A gas water heater is a common heating device that heats water by burning gas and transfers heat to cold water flowing through a heat exchanger to prepare hot water.

[0003] Due to structural design and functional requirements, most of the gas water heaters currently on the market use a square block-shaped shell, which is usually made of several sets of sheet metal parts through welding. During the actual processing, due to the large number of sheet metal parts, each sheet metal part needs to be aligned manually or by molds to ensure the welding quality and welding sealing. Then, this will add additional production processes, reduce production efficiency, and make it difficult to reduce manufacturing costs. Utility Model Content

[0004] The utility model aims to provide a water heater housing component and a gas water heater to solve the above technical problems.

[0005] In order to achieve the above objectives, the following technical solutions are provided:

[0006] In the first aspect, the utility model provides a water heater shell assembly, comprising: a main shell, which includes a bottom shell plate and an edge plate; a connecting plate is formed at the edge of the edge plate; the edge of the bottom shell plate is recessed to form a positioning groove for the connecting plate to fit and engage for pre-positioning; the connecting plate is engaged and welded to the positioning groove, so that the bottom shell plate and the edge plate are connected to each other to form a accommodating cavity with a sealing port at one end.

[0007] As an optional solution for the water heater shell assembly provided by the utility model, the bottom shell plate includes a back plate, the edge of the back plate is integrally extended and bent to form a supporting end plate, the positioning groove includes a first positioning groove formed on the edge of the back plate, and the connecting plate includes a first connecting plate for clamping and welding the first positioning groove.

[0008] As an optional solution for the water heater shell assembly provided by the utility model, the positioning groove also includes a second positioning groove, which is formed at one end edge of the supporting end plate, and the connecting plate also includes a second connecting plate corresponding to the second positioning groove and welded.

[0009] As an optional solution of the water heater housing assembly provided by the utility model, the first positioning groove includes a first groove section extending longitudinally, and a group of second groove sections are formed on the first groove section extending at least transversely.

[0010] As an optional solution of the water heater housing assembly provided by the utility model, the positioning groove is formed on the outer wall of the bottom shell plate away from the accommodating cavity.

[0011] As an optional solution of the water heater shell assembly provided by the utility model, the front end of the main shell is detachably connected to a face shell, which is used to close or open the packaging port; a joining gap is formed at the connection between the face shell and the main shell, and a drain outlet is provided at the bottom of the accommodating cavity; and a longitudinally extending diversion path is also included, one end of which is connected to the top of the joining gap and the other end of which is connected to the drain outlet.

[0012] As an optional solution of the water heater shell assembly provided by the utility model, a mounting surface is formed around the edge of one end of the packaging port away from the accommodating cavity; the surface shell includes a main board aligned with the packaging port, and a side panel enclosing and connecting the edge of the main board, the side panel is detachably connected to the mounting surface and engaged with the mounting surface to form the joining gap, and the packaging port extends outward to form a baffle ring, and the outer ring surface of the baffle ring, the inner wall surface of the side panel and the mounting surface together form a diversion path.

[0013] As an optional solution of the water heater housing assembly provided by the utility model, one end of the baffle ring close to the main board is folded outwardly with the packaging opening as the center to form a flange.

[0014] As an optional solution for the water heater shell assembly provided by the utility model, a card slot is provided on the mounting surface, a claw adapted to be inserted into the card slot is provided on the side panel, a hook for hooking the baffle ring is provided on the top of the side panel, and a limiting baffle for abutting the hook is provided on the top of the end of the baffle ring away from the packaging port.

[0015] In a second aspect, the utility model further provides a gas water heater, comprising the water heater shell structure as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0017] Figure 1 is an exploded view of a water heater housing assembly provided in this embodiment;

[0018] Figure 2 is an exploded view of the main shell of the water heater shell assembly provided in this embodiment;

[0019] Figure 3It is a schematic diagram of the structure of the bottom shell plate;

[0020] Figure 4 is a schematic diagram of the structure of the water heater housing assembly provided in this embodiment when a smoke exhaust hood is not installed;

[0021] Figure 5 is a structural schematic diagram of the main shell of the water heater shell assembly provided in this embodiment;

[0022] Figure 6 The structure of the shell of the water heater housing assembly provided in this embodiment is shown in FIG. Figure 1 ;

[0023] Figure 7 The structure of the shell of the water heater housing assembly provided in this embodiment is shown in FIG. Figure 2 ;

[0024] Figure 8 It is a schematic structural diagram of the water heater housing assembly provided in this embodiment when a smoke exhaust hood is installed.

[0025] In the figure:

[0026] 1. Main shell; 11. Accommodating cavity; 12. Packing port; 121. Mounting surface; 122. Flow-blocking ring; 123. Flanging; 124. Slot; 125. Limit baffle; 13. Bottom shell plate; 131. Back plate; 132. Support end plate; 14. Edge plate; 141. First connecting plate; 142. Second connecting plate; 15. First positioning groove; 151. First groove section; 152. Second groove section; 16. Second positioning groove; 17. Smoke outlet; 2. Surface shell; 21. Main board; 22. Side plate; 23. Ventilation port; 24. Claw; 25. Hook; 26. Water collecting plate; 27. Water collecting trough; 3. Joint gap; 4. Drainage port; 5. Diversion passage; 6. Smoke exhaust hood; 61. Smoke exhaust cavity; 62. Smoke exhaust port. DETAILED DESCRIPTION

[0027] In order to make the technical problems solved by the utility model, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Embodiment 1

[0031] refer to Figures 1 to 8 A water heater shell assembly includes a main shell 1 and a surface shell 2. The main shell 1 is formed with a receiving cavity 11, and the receiving cavity 11 can be used to install various internal components of the water heater, such as a burner, a fan assembly, a heat exchanger assembly, etc. The front end of the main shell 1 is provided with a packaging port 12 connected to the receiving cavity 11, and the surface shell 2 is detachably connected to the front end of the main shell 1 for closing or opening the packaging port 12.

[0032] Specifically, the main shell 1 includes a bottom shell plate 13 and an edge plate 14. The edge plate 14 can be connected to the edge of the bottom shell plate 13 by welding, bonding, fasteners, etc., and is connected with the bottom shell plate 13 to enclose the accommodating cavity 11 and the packaging port 12. The edge of the edge plate 14 is formed with a connecting plate, and correspondingly, the edge of the bottom shell plate 13 is recessed to form a positioning groove. When connecting, the connecting plate can be first snap-fitted and positioned in the positioning groove to achieve pre-positioning of the bottom shell plate 13 and the edge plate 14. On the basis of the snap-fit ​​connection, the connecting plate and the positioning groove are integrally connected by welding, fasteners, bonding, etc. to form a stable and sealed accommodating cavity 11. By setting the positioning groove and the connecting plate for snap-fit ​​positioning, the need for manual alignment can be reduced and the assembly efficiency can be improved. It should be noted that in this embodiment, in order to ensure the sealing and connection strength of the shell, the connecting plate and the positioning groove are preferably connected by welding. Similarly, it is assumed that the connecting plate and the positioning groove are connected by welding below.

[0033] Since the bottom shell is engaged with the connecting plate of the edging plate 14 by forming a positioning groove, the bottom shell plate 13 and the edging plate 14 can be connected by spot welding. Compared with the traditional gas water heater shell that connects multiple sheet metal edges by full welding, the welding points are more concentrated and controllable due to the use of local spot welding, which can reduce the connection strength problems caused by uneven welding or leaking welding, and can reduce the risk of thermal deformation during welding, which helps to maintain the overall shape and dimensional accuracy of the shell, make the shell appearance more beautiful, and improve product strength.

[0034] Furthermore, in order to improve the position accuracy of welding, in this embodiment, the bottom shell plate 13 includes a back plate 131, the edge of the back plate 131 is integrally extended and bent to form a support end plate 132, the positioning groove includes a first positioning groove 15 formed on the edge of the back plate 131, and the connecting plate includes a first connecting plate 141 for clamping and welding the first positioning groove 15. Through the above technical solution, during the production process, the support end plate 132 can be placed on the workbench as a support member, and the support end plate 132 supports the back plate 131 as the welded body, so that the back plate 131 is vertically arranged, which can effectively avoid the tilt and misalignment problems that may occur in the back plate 131 due to horizontal placement during the welding process, and help to ensure the welding quality and sealing. In addition, the vertical arrangement of the back plate 131 helps to observe and control the welding process, and facilitates the clamping and positioning of the first positioning groove 15 and the first connecting plate 141 in the horizontal direction, making the clamping process simpler and faster. The support end plate 132 can be integrally formed with the back plate 131 through stamping, bending and other processes.

[0035] In this embodiment, in order to further enhance the tightness of the connection between the edging plate 14 and the bottom shell plate 13, the positioning groove further includes a second positioning groove 16, and the second positioning groove 16 is formed at one end edge of the supporting end plate 132, and the connecting plate further includes a second connecting plate 142 corresponding to the second positioning groove 16 and welded. By providing the second positioning groove 16 and the second connecting plate 142, additional positioning points can be provided between the bottom shell plate 13 and the edging plate 14, dual positioning in different dimensions can be achieved, and positioning accuracy can be improved, so that the edging plate 14 and the bottom shell plate 13 are not easily deviated from each other during welding.

[0036] In addition to providing the second positioning groove 16 on the supporting end plate 132, the positioning accuracy between the bottom shell plate 13 and the edging plate 14 can also be improved by refining the design of the first positioning groove 15: the first positioning groove 15 includes a first groove section 151 extending longitudinally, and at least one group of second groove sections 152 are formed on the first groove section 151 extending transversely. During the production process, the longitudinal extension of the first groove section 151 can act on the main part of the first connecting groove, providing the main engaging and positioning reference, ensuring that the first connecting plate 141 can be stably engaged with the bottom shell plate 13 in the length direction. On the basis of the first groove section 151, the second groove section 152 extends transversely to provide the first connecting plate 141 with additional engaging points and positioning references, which helps to reduce deviations during installation and improve the accuracy and reliability of the connection.

[0037] The positioning groove can be formed on the outer wall of the bottom shell plate 13 away from the accommodating cavity 11, or can be formed on the inner wall of the bottom shell plate 13 close to the accommodating cavity 11. In the present embodiment, it is preferred that the positioning groove is formed on the outer wall of the bottom shell plate 13 away from the accommodating cavity 11. The reason is that: the positioning groove is formed on the outer wall of the bottom shell plate 13. When engaged, the edging plate 14 is hung on the bottom shell plate 13 from the outside to the inside, which is convenient for observation and operation, and helps to improve the installation efficiency and quality. In addition, since the positioning groove is externally located, the connecting plate is also externally located on the accommodating cavity 11, so that the edging plate 14 can participate in the load-bearing together, share the weight of the various components in the accommodating cavity 11 with the bottom shell plate 13, and enhance the load-bearing capacity and structural strength of the shell.

[0038] In addition, considering that the face shell 2 can be detachably connected to the front end of the main shell 1, a joint gap 3 will be formed at the connection between the face shell 2 and the main shell 1. When the water heater is installed outdoors or even in an open-air environment, water will accumulate on the top of the main shell 1. The accumulated water carrying impurities such as dust and rust can easily penetrate into the accommodating cavity 11 through the joint gap 3, thereby polluting the internal environment of the water heater, making the inside of the water heater humid, corroding components, affecting the performance of the water heater, and even causing safety problems such as short circuits.

[0039] In this regard, the improvement of the present application lies in that a drain port 4 for discharging liquid is provided at the bottom of the accommodating chamber 11, and also includes a longitudinally extending diversion passage 5, one end of which extends upward and is connected to the top of the joint gap 3, and the other end of the diversion passage 5 extends downward and is connected to the drain port 4. When working, the diversion passage 5 can divert and transport the accumulated water that penetrates into the accommodating chamber 11 through the joint gap 3 to the drain port 4, and discharge the accumulated water through the drain port 4, so that the interior of the accommodating chamber 11 can be continuously kept dry and clean.

[0040] Of course, the technical solution of "draining the accumulated water through the drain port 4 in coordination with the diversion passage 5" has a variety of implementation structures. However, if the diversion passage 5 is improperly designed, it will not only occupy too much of the originally tight and scarce internal space of the existing water heater, causing interference with later maintenance and increasing the difficulty of disassembly and installation, but may also cause accumulated water leakage. In response to the above potential technical problems, this embodiment provides a specific implementation structure of "draining the accumulated water through the drain port 4 in coordination with the diversion passage 5".

[0041] Specifically, a mounting surface 121 is formed around the edge of the sealing opening 12 of the main shell 1, and the face shell 2 includes a main board 21 and a side panel 22. The main board 21 is aligned with the sealing opening 12, and the side panel 22 is connected to the edge of the main board 21 and surrounds the sealing opening 12 in a closed loop. The side panel 22 is detachably connected to the mounting surface 121 by means of fasteners (screws or bolts), snaps, etc., and the side panel 22 and the mounting surface 121 form a joint gap 3 at the joint; the sealing opening 12 extends outward (i.e., toward the main board 21) to form a baffle ring 122, and the baffle ring 122, the side panel 22 and the mounting surface 121 are together The above-mentioned diversion passage 5 is formed together, and the drainage hole is arranged at the bottom of the mounting surface 121 and / or the bottom of the side plate 22. During operation, when the accumulated water on the top of the main shell 1 seeps downward to the accommodating chamber 11 through the joint gap 3, the outer wall of the top of the baffle ring 122 first contacts and receives the seeping accumulated water, and the accumulated water flows along the outer wall of the baffle ring 122, flows through the diversion passage 5 composed of the baffle ring 122, the mounting surface 121, and the side plate 22, and is transported downward, and finally reaches the bottom of the main shell 1, and is discharged through the drainage port 4 on the mounting surface 121 and / or the side plate 22, so as to prevent the accumulated water from contacting the internal components of the accommodating chamber 11.

[0042] Through the above technical solution, the flow guide path 5 is formed by the cooperation of the baffle ring 122, the mounting surface 121 and the side plate 22, so that the flow guide path 5 can be placed outside the packaging port 12 and the accommodating cavity 11. This design not only effectively solves the problem of accumulated water discharge, but also avoids occupying the internal space of the accommodating cavity 11, which helps to improve the space utilization and maintainability of the water heater.

[0043] In this embodiment, similar to the shell of the existing water heater, the main board 21 of the face shell 2 is provided with a vent 23, which is used to allow external air to enter the water heater to assist combustion. Furthermore, in order to prevent "the accumulated water from splashing and transferring to the inner wall of the main board 21 and being retained in the vent 23 during transportation, and then following the airflow into the internal components of the water heater, affecting the gas combustion process", in this embodiment, the end of the baffle ring 122 close to the main board 21 is folded outward with the packaging port 12 as the center to form a flange 123, which limits the flow path of the accumulated water on the baffle ring 122, and prevents the accumulated water from passing over the baffle ring 122 during transportation and transferring and splashing onto the main board 21.

[0044] To facilitate the cleaning of the diversion passage 5, in the present embodiment, the face shell 2 is detachably connected to the main shell 1 in a snap-fitting manner. Specifically, a plurality of slots 124 are provided on the mounting surface 121 of the main shell 1, and correspondingly, claws 24 that can be adapted to fit into the slots 124 are provided on the side panel 22.

[0045] Considering that the gas water heater is used outdoors in a relatively harsh application environment, although the snap-on form is convenient for disassembling the mounting surface 121 shell and improving the assembly and maintenance efficiency, its connection stability and firmness are not as good as the detachable connection method based on fasteners such as screws and bolts. In this regard, in this embodiment, the "connection form between the surface shell 2 and the main shell 1" is optimized and improved in combination with the flow guide passage 5. Specifically, a hook 25 for hanging the baffle ring 122 is provided at the top of the side plate 22, and a hook 25 for resisting the baffle ring 122 is provided at the top of the end of the baffle ring 122 away from the packaging port 12. When using the limit baffle 125 connected to the hook 25, the face shell 2 can be tilted first so that the claw 24 on the face shell 2 is engaged with the groove 124 on the mounting surface 121, and the hook 25 at the top of the side plate 22 is hooked on the outer ring surface of the baffle ring 122. The groove 124 and the baffle ring 122 support the face shell 2 together to add additional support points, and the limit baffle 125 contacts and abuts the hook 25 to prevent the hook 25 from accidentally detaching from the baffle ring 122, thereby improving the overall stability and firmness of the connection between the face shell 2 and the main shell 1 on the basis of the clamping.

[0046] In the present embodiment, the baffle ring 122 can be formed by connecting to the packaging port 12 by welding, or can be formed on the packaging port 12 by integral molding. In the present embodiment, since the baffle ring 122 also plays the role of supporting the surface shell 2, in order to improve the connection stability, it is preferably integrally molded on the packaging port 12 by casting, hot pressing, etc.

[0047] In addition, similar to the existing outdoor gas water heaters, a smoke outlet 17 is provided on the top of the main shell 1. The smoke outlet 17 is used to discharge the smoke after combustion and heat exchange of the gas water heater to the outside. In order to prevent rainwater, dust and other impurities from entering the gas water heater through the smoke outlet 17, a smoke exhaust hood 6 is also provided on the top of the main shell 1. The smoke exhaust hood 6 is covered on the top of the main shell 1 and forms a smoke exhaust cavity 61 connected to the smoke outlet 17. The side wall of the smoke exhaust hood 6 is provided with a smoke exhaust cavity 61 connected to the smoke outlet 17. When working, the smoke delivered by the smoke outlet 17 is received by the smoke exhaust cavity 61, and the smoke is discharged laterally through the smoke exhaust cavity 61 through the smoke exhaust outlet 62 arranged on the side wall of the smoke exhaust hood 6, so as to ensure the normal discharge of the smoke from the gas water heater while preventing impurities such as rainwater and dust from entering the smoke outlet 17.

[0048] However, the above technical solution has the following problems: the gas that is burned to generate heat in current gas water heaters is usually natural gas or liquefied petroleum gas (LPG), which will produce water vapor during combustion. The water vapor is discharged along with the smoke. During the smoke exhaust process, part of the water vapor will be discharged along with the smoke, but some water vapor will still follow the smoke to contact the inner wall of the smoke exhaust hood 6, condense into liquid water on the inner wall surface of the smoke exhaust chamber 61 and then remain in the smoke exhaust hood 6. Since the smoke carries some impurities and is highly corrosive, these liquid waters remain in the smoke exhaust hood 6, which will not only continue to erode the top of the main shell 1, but also when the outdoor temperature is high, it will evaporate again into water vapor, and then flow back into the smoke outlet 17, increasing the internal humidity of the gas water heater and affecting the normal operation of the water heater.

[0049] In order to solve the above technical problems and prevent continuous water accumulation in the smoke exhaust chamber 61, in the present embodiment, the top of the joint gap 3 formed by the face shell 2 and the mounting surface 121 is at least partially covered by the smoke exhaust hood 6, so that the smoke exhaust chamber 61 is connected to the joint gap 3. Through the above scheme, not only can the joint gap 3 be partially covered by the smoke exhaust hood 6 to reduce the amount of water infiltrating into the joint gap 3 from the top outer wall of the main shell 1, but also the accumulated water formed by condensation in the smoke exhaust chamber 61 can be discharged together through the joint gap 3, the diversion passage 5 and the drain port 4, so that the interior of the smoke exhaust chamber 61 can be kept dry.

[0050] In addition, one end of the side panel 22 away from the main board 21 extends toward the packaging port 12 to form a water collecting plate 26. The side panel 22, the main board 21 and the bottom of the water collecting plate 26 together enclose a water collecting trough 27. A drainage hole is formed at the bottom of the water collecting trough 27. Through the above technical scheme, the contact area between the side panel 22 and the mounting surface 121 can be increased through the water collecting plate 26, so that less accumulated water contacts the main shell 1, and a water collecting trough 27 is formed at the bottom of the surface shell 2. The surface shell 2 uniformly discharges the accumulated water, reducing the erosion of the mounting surface 121 and the main shell 1 by the accumulated water, thereby protecting the main shell 1.

[0051] Embodiment 2

[0052] A gas water heater comprises the water heater shell structure of the first embodiment.

[0053] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A water heater housing assembly, characterized in that: include: A main housing (1), comprising a bottom shell plate (13) and an edge plate (14); The edge of the edging plate (14) is formed with a connecting plate; The edge of the bottom shell plate (13) is recessed to form a positioning groove for the connecting plate to fit and engage for pre-positioning; the connecting plate is engaged and connected to the positioning groove, so that the bottom shell plate (13) and the edge plate (14) are connected to each other to enclose a receiving cavity (11) with a sealing opening (12) at one end.

2. The water heater housing assembly according to claim 1, characterized in that: The bottom shell plate (13) comprises a back plate (131), and the edge of the back plate (131) is integrally extended and bent to form a supporting end plate (132).

3. The water heater housing assembly according to claim 2, characterized in that: The positioning groove comprises a first positioning groove (15) and a second positioning groove (16), the first positioning groove (15) is formed at one end edge of the back plate (131), and the second positioning groove (16) is formed at one end edge of the supporting end plate (132), and the connecting plate comprises a first connecting plate (141) respectively engaging and welding with the first positioning groove (15) and a second connecting plate (142) respectively engaging and welding with the second positioning groove (16).

4. The water heater housing assembly according to claim 3, characterized in that: The first positioning groove (15) comprises a first groove section (151) extending longitudinally, and at least a group of second groove sections (152) extending transversely are formed on the first groove section (151).

5. The water heater housing assembly according to claim 2, characterized in that: The positioning groove is formed on an outer wall of the bottom shell plate (13) away from the accommodating cavity (11).

6. The water heater housing assembly according to any one of claims 1 to 5, characterized in that: The front end of the main shell (1) is detachably connected to a face shell (2) for closing or opening the packaging port (12); a joint gap (3) is formed at the connection between the face shell (2) and the main shell (1); a drainage port (4) is provided at the bottom of the accommodating cavity (11); and a longitudinally extending diversion passage (5) is also included, one end of which is connected to the top of the joint gap (3) and the other end of which is connected to the drainage port (4).

7. The water heater housing assembly according to claim 6, characterized in that: The packaging opening (12) is provided with a mounting surface (121) around the edge of one end away from the accommodating cavity (11); the face shell (2) comprises a main board (21) aligned with the packaging opening (12), and a side panel (22) surrounding and connecting the edge of the main board (21); the side panel (22) is detachably connected to the mounting surface (121) and is joined with the mounting surface (121) to form the joining gap (3); the packaging opening (12) is extended outward to form a baffle ring (122); the outer ring surface of the baffle ring (122), the inner wall surface of the side panel (22) and the mounting surface (121) together form a flow guide passage (5).

8. The water heater housing assembly according to claim 7, characterized in that: One end of the baffle ring (122) close to the main board (21) is folded outwards with the packaging opening (12) as the center to form a flange (123).

9. The water heater housing assembly according to claim 7, characterized in that: The mounting surface (121) is provided with a slot (124), the side plate (22) is provided with a claw (24) adapted to be plugged into the slot (124), the top end of the side plate (22) is provided with a hook (25) for hooking the baffle ring (122), and the top end of the baffle ring (122) away from the packaging opening (12) is provided with a limit baffle (125) for abutting against the hook (25).

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

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