Shell assembly and water heater

Abstract

The invention discloses a shell assembly and a water heater, the shell assembly comprises a mask part and a box body part, the mask part is provided with a mask top plate, the box body part is provided with a box body top plate, and the mask top plate covers the box body top plate; a locking part is arranged between the box body top plate and the mask top plate, the locking part comprises an elastic locking piece arranged on the mask top plate and a locking groove formed in the box body top plate, the elastic locking piece is connected with the locking groove, and pulling force is formed between the mask top plate and the box body top plate. By adopting the scheme, the locking part is arranged between the box body top plate and the mask top plate, and the locking part can provide tensile force for the mask top plate and the box body top plate, so that the mask top plate and the box body top plate can be attached, a gap is prevented from being formed between the mask top plate and the box body top plate, and the shell assembly is sealed to achieve water resistance.

Description

Technical Field

[0001] The invention relates to a housing component and a water heater. Background Art

[0002] In order to meet the requirements of waterproofing and airtightness, the shell in the prior art usually needs to reduce the assembly gap between the shell parts. For example, in the field of water heaters, the waterproof standard requires spraying in the left and right, front and back directions of 15° to ensure that water does not drip on live parts after entering. There is a gap between the assembly of the water heater body and the mask part, and water droplets will flow into the water heater from the assembly gap. Existing water heaters generally fill the gap with sealing strips to prevent water from entering the machine.

[0003] However, the method of attaching sealing strips requires adding processes on the production line, increasing production costs, and deformation of the sealing strips after reassembly will lead to poor sealing, and there is still a risk that spray test water will enter the interior of the machine. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defect that the outer shell component in the prior art has an assembly gap which causes waterproof problems, and to provide an outer shell component and a water heater.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A housing assembly, the housing assembly comprising a mask portion and a box portion, the mask portion having a mask top plate, the box portion having a box top plate, the mask top plate covering the box top plate;

[0007] A locking portion is provided between the box top plate and the mask top plate, and the locking portion includes an elastic locking piece arranged on the mask top plate and a locking groove arranged on the box top plate. The elastic locking piece is connected to the locking groove and forms a pulling force between the mask top plate and the box top plate.

[0008] In this solution, a locking portion is provided between the box top plate and the mask top plate, which can provide pulling force to the mask top plate and the box top plate so that the two can fit together, thereby avoiding the formation of a gap between the mask top plate and the box top plate, thereby achieving sealing of the outer shell assembly and achieving waterproofing.

[0009] Preferably, the elastic locking member includes an elastic member and a locking block, one end of the elastic member is used to connect to the mask top plate, and the other end of the elastic member is connected to the locking block, and a first magnet is provided in the circumference of the locking block; the top plate of the box body is provided with two second magnets arranged opposite to each other, and the locking groove is formed between the two second magnets; the first magnet and the second magnet attract each other, and the locking block is locked in the locking groove.

[0010] In this solution, the locking block can be locked into the locking groove through the adsorption of the first magnet and the second magnet, so that the elastic member is stretched and deformed to generate tension, and the tension can act between the mask top plate and the box top plate to avoid the formation of an assembly gap.

[0011] Preferably, a third magnet is further provided in the circumference of the locking block, and the third magnet repels the second magnet; a magnet groove is provided on the top plate of the box body, and the two second magnets can slide in the magnet groove; the locking block is rotated until the third magnet is opposite to the second magnet, and the two second magnets are separated, so that the locking block is disengaged from the locking groove.

[0012] In this solution, the third magnet repels the second magnet. When the locking block rotates to the point where the third magnet is facing the second magnet, the locking groove formed between the two second magnets can be opened, and the locking block can be disengaged from the locking groove, thereby allowing the box top plate and the mask top plate to be disengaged, and then the box body and the mask part to be disengaged, thereby facilitating disassembly of the two at the top, and during reassembly, the elastic locking piece can also be locked in the locking groove, and the formation of an equipment gap can still be avoided after reassembly.

[0013] Preferably, the top plate of the box body is recessed downward to form the magnet slot, the size of the slot opening of the magnet slot is smaller than the size of the slot bottom of the magnet slot, and the two second magnets are respectively embedded at both ends of the magnet slot.

[0014] Preferably, the locking block is provided with two first magnets and two third magnets, the two first magnets and the two third magnets are alternately arranged in sequence in the circumferential direction of the locking block, and the two first magnets are arranged relative to each other, and the two second magnets are arranged relative to each other.

[0015] Preferably, a locking groove is provided in the circumference of the locking block, and the two second magnets are both provided with a groove, and the second magnets are engaged in the locking groove through the groove.

[0016] Preferably, the mask top plate has a bulge and forms a accommodating cavity, and the bulge is provided with a through hole; one end of the elastic member is connected to an abutment plate, the size of the abutment plate is larger than the size of the through hole, and the other end of the elastic member extends into the accommodating cavity through the through hole and is connected to the locking block.

[0017] In this solution, the other end of the elastic member can be connected to the mask top plate via the abutment plate, so that the elastic force of the elastic member is applied between the mask top plate and the box top plate.

[0018] Preferably, a limiting portion is provided between the abutment plate and the locking block, the elastic member is a spring, and the spring is sleeved on the limiting portion; the limiting portion includes a reference ring and a rotating ring, the reference ring is connected to the locking block, and the rotating ring is connected to the abutment plate; the rotating ring is inserted into the reference ring.

[0019] In this solution, by setting a limit portion, when the elastic locking member is operated to rotate, the rotation applied to the outside of the box top plate can be reliably converted into the rotation of the locking block, so that the first magnet or the third magnet on the locking block can smoothly face the second magnet.

[0020] Preferably, one of the rotating ring and the reference ring is provided with a slideway, and the other is provided with a slider; the slideway extends in a circumferential spiral around the rotating ring or the reference ring on which it is provided; the rotating ring moves in the reference ring along the axial direction of the spring, and the slider slides in the slideway.

[0021] Preferably, a lifting ring is further provided between the abutment plate and the convex bump, and the lifting ring is sleeved on the elastic member.

[0022] In this solution, by providing a lifting ring, the pulling effect provided by the elastic member can be enhanced.

[0023] Preferably, a plurality of locking portions are provided between the mask top plate and the box body top plate, and the plurality of locking portions are arranged at intervals around the flue opening of the outer shell assembly.

[0024] In this solution, a plurality of locking parts are provided, which can be locked at a plurality of positions of the mask top plate and the box top plate, thereby further avoiding an overall gap between the mask top plate and the box top plate.

[0025] A water heater comprises the housing assembly as described above.

[0026] The positive and progressive effect of the present invention is that a locking portion is provided between the box top plate and the mask top plate, and the locking portion can provide pulling force to the mask top plate and the box top plate so that the two can fit together, thereby avoiding the formation of a gap between the mask top plate and the box top plate, thereby realizing the sealing of the outer shell assembly and achieving waterproofness. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of a housing assembly provided by an embodiment of the present invention;

[0028] Figure 2 A cross-sectional view of a housing assembly at the top provided by an embodiment of the present invention;

[0029] Figure 3 Another cross-sectional view of the housing assembly at the top provided by the embodiment of the present invention;

[0030] Figure 4 A schematic top view of a housing assembly provided in an embodiment of the present invention;

[0031] Figure 5 A schematic top view of a housing assembly provided in an embodiment of the present invention, wherein the top panel is hidden and the locking slot is in an open state;

[0032] Figure 6 A cross-sectional view of a housing assembly at the top of an embodiment of the present invention, wherein the locking slot is in an open state;

[0033] Figure 7 Another cross-sectional view of the housing assembly at the top provided by an embodiment of the present invention, wherein the locking slot is in an open state;

[0034] Figure 8 A schematic top view of a housing assembly provided in an embodiment of the present invention, wherein the top panel is hidden and the locking groove is in a locked state;

[0035] Fig. 9 A cross-sectional view of a housing assembly at the top provided by an embodiment of the present invention, wherein the locking groove is in a locked state;

[0036] Fig.10 Another cross-sectional view of the housing assembly at the top provided by the embodiment of the present invention, wherein the locking groove is in a locked state;

[0037] Fig.11 A schematic structural diagram of a position limiting portion provided by an embodiment of the present invention;

[0038] Fig.12 for Fig.11 A perspective diagram of the middle limiter.

[0039] Description of Reference Numerals

[0040] Shell assembly 1, mask portion 10, mask top plate 100, convex bump 110, through hole 111, box portion 20, box top plate 200, magnet groove 210, locking portion 30, elastic locking member 300, elastic member 310, locking block 320, slot 321, first magnet 330, third magnet 340, abutment plate 350, limiting portion 360, reference ring 361, slider 3611, rotating ring 362, slideway 3621, lifting ring 370, locking groove 400, second magnet 410, groove 411. DETAILED DESCRIPTION

[0041] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0042] This embodiment provides a housing component 1, such as Figure 1 , Figure 2 and Figure 3 As shown, the housing assembly 1 includes a mask portion 10 and a box portion 20, the mask portion 10 has a mask top plate 100, the box portion 20 has a box top plate 200, and the mask top plate 100 covers the box top plate 200. Figure 1 As shown, the box body 20 is roughly C-shaped in the vertical plane, and the mask part 10 is roughly C-shaped in the horizontal plane, and the two are embedded in each other to form a basically closed chamber; Figure 2 and Figure 3 As shown, at the top of the shell assembly 1, the mask top plate 100 is stacked and covers the box top plate 200, and the mask top plate 100 and the box top plate 200 are both basically flat plate-like structures.

[0043] like Figure 4-Figure 12 As shown, a locking part 30 is provided between the top plate 200 of the box body and the top plate 100 of the mask, and the locking part 30 includes an elastic locking member 300 provided on the top plate 100 of the mask and a locking groove 400 provided on the top plate 200 of the box body, and the elastic locking member 300 is connected with the locking groove 400, and a tension is formed between the top plate 100 of the mask and the top plate 200 of the box body. A locking part 30 is provided between the top plate 200 of the box body and the top plate 100 of the mask, and the locking part 30 can provide a tension to the top plate 100 of the mask and the top plate 200 of the box body, so that the two can fit together, thereby avoiding the formation of a gap between the top plate 100 of the mask and the top plate 200 of the box body, thereby achieving the sealing of the housing assembly 1 and achieving waterproofing.

[0044] In this embodiment, the locking portion 30 is applied between the mask top plate 100 and the box top plate 200. In other embodiments, the other two plates of the housing assembly 1 that are stacked may also be provided with the locking portion 30 to eliminate the assembly gap between the two. In addition, this embodiment uses the elastic locking member 300 to apply a pulling force in the vertical direction, so that the mask top plate 100 and the box top plate 200 can be attached to each other, thereby eliminating the assembly gap between the two. There are multiple implementation methods for the specific structural form of the elastic locking member 300, the specific structural form of the locking groove 400, and the matching method between the elastic locking member 300 and the locking groove 400.

[0045] As a feasible implementation method, Figure 5-Figure 7 and Figure 8-Figure 10As shown, the elastic locking member 300 includes an elastic member 310 and a locking block 320. One end of the elastic member 310 is used to connect with the mask top plate 100, and the other end of the elastic member 310 is connected with the locking block 320. The locking block 320 is provided with a first magnet 330 in the circumferential direction. The top plate 200 of the box body is provided with two second magnets 410 arranged opposite to each other, and a locking groove 400 is formed between the two second magnets 410. The first magnet 330 and the second magnet 410 attract each other, and the locking block 320 is locked in the locking groove 400. Through the adsorption of the first magnet 330 and the second magnet 410, the locking block 320 can be locked in the locking groove 400, so that the elastic member 310 is stretched and deformed to generate tension, and the tension can act between the mask top plate 100 and the box body top plate 200 to avoid the formation of an assembly gap.

[0046] like Figure 1-Figure 4 As shown, the mask top plate 100 is provided with a convex hump 110, and the accommodating cavity formed by the convex hump 110 can be used to accommodate the elastic locking member 300; the box top plate 200 is provided with a magnet groove 210, and the magnet groove 210 can be used to set the second magnet 410, and the two second magnets 410 are relatively arranged in the magnet groove 210, and the space between the two second magnets 410 forms a locking groove 400. The space between the convex hump 110 and the second magnet 410 is opposite in the vertical direction, so that the elastic locking member 300 and the locking groove 400 are directly opposite. In addition, the convex hump 110 is provided with a through hole 111, and the diameter of the through hole 111 is not less than the outer diameter of the elastic locking member 300 extending into the accommodating cavity, so that the elastic locking member 300 can extend into the accommodating cavity from the through hole 111 of the convex hump 110. As shown Figure 5 As shown, the first magnet 330 is an S pole, and the second magnet 410 is an N pole. Specifically, in the process of the elastic locking member 300 extending from the through hole 111 into the accommodating cavity, the early locking block 320 can fall into the through hole 111 and move downward according to its own weight. When the locking block 320 gradually falls into the magnet slot 210, due to the attraction between like poles, the first magnet 330 is attracted by the second magnet 410 until it falls into the locking slot 400 and is locked.

[0047] Thus, in the above embodiment, the locking force can be provided by the adsorption between the magnets, and the elastic locking member 300 is locked at a position where a pulling force can be provided. Further, in a more preferred embodiment, the positions of the two second magnets 410 can be close to or away from each other, so that the size of the locking groove 400 can be changed. In this more preferred embodiment, the elastic locking member 300 can also be separated from the locking groove 400, so that the mask top plate 100 and the box top plate 200 are easily disassembled.

[0048] Specifically, Figure 5-Figure 7 and Figure 8-Figure 10As shown, a third magnet 340 is also provided in the circumference of the locking block 320, and the third magnet 340 repels the second magnet 410; the top plate 200 of the box body is provided with a magnet groove 210, and the two second magnets 410 can slide in the magnet groove 210; the locking block 320 is rotated until the third magnet 340 is opposite to the second magnet 410, and the two second magnets 410 are separated, so that the locking block 320 is separated from the locking groove 400. The third magnet 340 repels the second magnet 410. When the locking block 320 rotates to the point where the third magnet 340 is directly opposite to the second magnet 410, the locking groove 400 formed between the two second magnets 410 can be opened, and the locking block 320 can be disengaged from the locking groove 400, thereby allowing the box top plate 200 and the mask top plate 100 to be disengaged, and then the box body 20 and the mask part 10 to be disengaged, thereby facilitating the disassembly of the two at the top, and during reassembly, the elastic locking member 300 can also be locked in the locking groove 400, and the formation of an equipment gap can still be avoided after reassembly.

[0049] As an implementation of the magnet slot 210, Figure 2 and Figure 3 As shown, the top plate 200 of the box body is recessed downward to form a magnet slot 210, the size of the slot opening of the magnet slot 210 is smaller than the size of the slot bottom of the magnet slot 210, and the two second magnets 410 are respectively embedded at both ends of the magnet slot 210, so as to limit the second magnets 410 from escaping from the magnet slot 210 in the vertical direction. Preferably, the cross section of the magnet slot 210 is trapezoidal, and correspondingly, the cross section of the second magnet 410 is also trapezoidal. Figure 5 and Figure 8 As shown, the length of the magnet slot 210 is greater than the sum of the lengths of the two second magnets 410 , thereby reserving space for the sliding of the second magnets 410 .

[0050] like Figure 5 As shown, the locking block 320 is provided with two first magnets 330 and two third magnets 340, and the two first magnets 330 and the two third magnets 340 are alternately arranged in the circumferential direction of the locking block 320, and the two first magnets 330 are arranged relative to each other, and the two second magnets 410 are arranged relative to each other. Specifically, each first magnet 330 and each second magnet 410 each occupies 90°, and the four magnets enclose 360°. Furthermore, the part of the second magnet 410 facing the locking block is the N pole, the first magnet 330 is the S pole, and the third magnet 340 is the N pole. As shown Figure 5 As shown, when the locking block 320 rotates until the third magnet 340 is directly opposite to the second magnet 410, the two second magnets 410 separate from each other, the locking groove 400 opens, and the locking block 320 can be separated from the locking groove 400. Figure 8As shown, when the locking block 320 rotates until the first magnet 330 and the second magnet 410 are facing each other, the two second magnets 410 are close to each other, the locking groove 400 is closed, and the locking block 320 can be locked in the locking groove 400.

[0051] like Figure 5 and Figure 8 As shown, the locking block 320 is provided with a slot 321 in the circumferential direction, and the two second magnets 410 are both provided with a groove 411, and the second magnets 410 are connected to the slot 321 through the groove 411. Figure 5 As shown, the first magnet 330 and the third magnet 340 are disposed in the slot 321 .

[0052] like Figure 5-Figure 7 and Figure 8-Figure 10 As shown, the bottom of the magnet slot 210 is also provided with a through hole 111, and the diameter of the through hole 111 is not less than the outer diameter of the elastic locking member 300 extending into the accommodating cavity. Figure 5 , Figure 6 and Figure 7 As shown, in the early stage, the locking block 320 falls into the through hole 111 of the convex bump 110 by its own weight. Before the locking block 320 reaches the magnet slot 210, the second magnets 410 in the magnet slot 210 have the same poles and the N poles facing each other. Due to the repulsion of like poles, the two second magnets 410 push each other away. Figure 8 , Fig. 9 and Fig.10 As shown, when the locking block 320 gradually falls into the magnet groove 210, since four magnets are arranged on the side of the locking block 320, according to the principle of like attracts like, the second magnet 410 is attracted by the first magnet 330 of the locking block 320 and approaches the middle of the locking block 320, thereby locking the locking block 320 in the locking groove 400.

[0053] like Figure 6 , Figure 7 and Fig. 9 , Fig.10 As shown, the mask top plate 100 has a convex bulge 110 and forms a receiving cavity, and the convex bulge 110 is provided with a through hole 111; one end of the elastic member 310 is connected to an abutment plate 350, the size of the abutment plate 350 is larger than the size of the through hole 111, and the other end of the elastic member 310 extends into the receiving cavity through the through hole 111 and is connected to the locking block 320. The other end of the elastic member 310 can be connected to the mask top plate 100 through the abutment plate 350, so that the elastic force of the elastic member 310 is applied between the mask top plate 100 and the box top plate 200.

[0054] Furthermore, if Fig. 9 and Fig.10As shown, a lifting ring 370 is further provided between the abutment plate 350 and the convex bump 110, and the lifting ring 370 is sleeved on the elastic member 310. By providing the lifting ring 370, the pulling effect provided by the elastic member 310 can be enhanced. Specifically, when the locking block 320 is locked into the locking groove 400 by the second magnet 410 and cannot be removed, the lifting ring 370 is inserted above the convex bump 110, further stretching the elastic member 310, and the elastic member 310 generates a pulling force on the locking block 320, and the locking block 320 drives the box top plate 200 to fit toward the mask top plate 100, thereby eliminating the gap between the box top plate 200 and the mask top plate 100.

[0055] Therefore, in any of the above embodiments, the tension generated by the elongation and deformation of the spring between the mask top plate 100 and the box top plate 200 is used to push the locking block 320 to fit the box top plate 200 toward the mask top plate 100, thereby avoiding the possibility of a gap during assembly and achieving a sealed outer shell assembly 1 to achieve a waterproof effect. In addition, the above embodiments do not require the use of sealing strips or screws, so that the box portion 20 and the mask portion 10 fit tightly together without a gap.

[0056] In addition, by rotating the angle of the locking block 320, rotating the N pole and the S pole by 90 degrees, the interaction force between the locking block 320 and the magnet can be changed from attractive force to repulsive force, and the locked state can be changed to the reset state, so that the mask part 10 and the box body part 20 can be fixed and disassembled. When the mask part 10 and the box body part 20 are to be disassembled, the lifting ring 370 is taken out, the elastic member 310 and the locking block 320 are rotated by 90°, the N pole of the third magnet 340 of the locking block 320 and the N pole of the second magnet 410 repel each other, and the two magnets are separated and returned to the two ends of the magnet slot 210, and the locking block 320 can be removed from the locking slot 400. Both the fixing and disassembly processes do not require screw fixing, and the gap deviation caused by production can be eliminated by the size of the lifting ring 370, which has wide applicability.

[0057] As a further preferred embodiment, a limiting portion 360 may be provided so that the applied rotation can be reliably converted into the rotation of the locking block 320. Figure 6 , Figure 7 and Fig. 9 , Fig.10 as well as Fig.11 , Fig.12As shown, a limiting portion 360 is further provided between the abutment plate 350 and the locking block 320, and the elastic member 310 is a spring, which is sleeved on the limiting portion 360; the limiting portion 360 includes a reference ring 361 and a rotating ring 362, the reference ring 361 is connected to the locking block 320, and the rotating ring 362 is connected to the abutment plate 350; the rotating ring 362 is inserted into the reference ring 361. By providing the limiting portion 360, when the elastic locking member 300 is operated to rotate, the rotation applied on the outer side of the box top plate 200 can be reliably converted into the rotation of the locking block 320, so that the first magnet 330 or the third magnet 340 on the locking block 320 can smoothly face the second magnet 410.

[0058] like Fig.11 and Fig.12 As shown, one of the rotating ring 362 and the reference ring 361 is provided with a slideway 3621, and the other is provided with a slider 3611; the slideway 3621 spirally extends around the circumferential direction of the rotating ring 362 or the reference ring 361 provided with it; the rotating ring 362 moves in the reference ring 361 along the axial direction of the spring, and the slider 3611 slides in the slideway 3621. Specifically, the slideway 3621 is provided on the rotating ring 362, and the slider 3611 is provided on the reference ring 361.

[0059] By setting the rotating ring 362 and the reference ring 361 to formulate corresponding orbits, the upper and lower distances of the rings can be controlled by relative rotation of the rings, thereby controlling the extension / compression of the spring in the vertical direction. Fig.11 and Fig.12 As shown, a slideway 3621 with a surrounding track is provided on the rotating ring 362, and a slider 3611 is provided on the reference ring 361. The reference ring 361 and the locking block 320 can be welded for reliable fixation. Through the relative rotation of the slider 3611 on the rotating ring 362 and the reference ring 361, the circular rotation is converted into an up and down displacement change between the rotating ring 362 and the reference ring 361, thereby realizing the stretching or compression of the spring. This structure changes the deformation of the spring by rotating the rotating ring 362, thereby avoiding the twisting of the spring in the circumferential direction.

[0060] like Figure 1-Figure 10 As shown, a plurality of locking parts 30 are provided between the mask top plate 100 and the box top plate 200, and the plurality of locking parts 30 are arranged at intervals around the flue opening of the housing assembly 1. The plurality of locking parts 30 are provided so that the mask top plate 100 and the box top plate 200 can be locked at multiple positions, thereby further avoiding the overall gap between the mask top plate 100 and the box top plate 200.

[0061] Specifically, there are three locking parts 30 between the mask top plate 100 and the box top plate 200, and the common force of the three locking parts 30 eliminates the gap between the box top plate 200 and the mask top plate 100. Further, there are flue openings on the box top plate 200 and the mask top plate 100, and the three locking parts 30 surround the flue openings.

[0062] This embodiment also provides a water heater, such as Figure 1 As shown, the water heater comprises the housing assembly 1 as described above.

[0063] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A housing assembly, characterized in that: The housing assembly comprises a mask portion and a box portion, wherein the mask portion has a mask top plate, and the box portion has a box top plate, wherein the mask top plate covers the box top plate; A locking portion is provided between the box top plate and the mask top plate, and the locking portion includes an elastic locking piece arranged on the mask top plate and a locking groove arranged on the box top plate. The elastic locking piece is connected to the locking groove and forms a pulling force between the mask top plate and the box top plate.

2. The housing assembly according to claim 1, wherein: The elastic locking member comprises an elastic member and a locking block, one end of the elastic member is used to connect with the mask top plate, the other end of the elastic member is connected with the locking block, and a first magnet is arranged around the locking block; The top plate of the box body is provided with two second magnets arranged opposite to each other, and the locking groove is formed between the two second magnets; the first magnet and the second magnet attract each other, and the locking block is locked in the locking groove.

3. The housing assembly according to claim 2, wherein: A third magnet is also provided in the circumference of the locking block, and the third magnet repels the second magnet; The top plate of the box body is provided with a magnet groove, and the two second magnets can slide in the magnet groove; the locking block is rotated until the third magnet is opposite to the second magnet, and the two second magnets are separated, so that the locking block is separated from the locking groove.

4. The housing assembly according to claim 3, wherein: The top plate of the box body is recessed downward to form the magnet slot, the size of the slot opening of the magnet slot is smaller than the size of the slot bottom of the magnet slot, and the two second magnets are respectively embedded at two ends of the magnet slot.

5. The housing assembly according to claim 3, wherein: The locking block is provided with two first magnets and two third magnets, and the two first magnets and the two third magnets are alternately arranged in the circumferential direction of the locking block, and the two first magnets are arranged opposite to each other, and the two second magnets are arranged opposite to each other.

6. The housing assembly according to claim 2, wherein: A clamping groove is provided in the circumference of the locking block, and the two second magnets are both provided with a groove, and the second magnets are clamped into the clamping groove through the groove.

7. The housing assembly according to claim 3, wherein: The mask top plate has a bulge and forms a accommodating cavity, and the bulge is provided with a through hole; one end of the elastic member is connected to an abutment plate, the size of the abutment plate is larger than the size of the through hole, and the other end of the elastic member extends into the accommodating cavity through the through hole and is connected to the locking block.

8. The housing assembly according to claim 7, wherein: A limiting portion is further provided between the abutment plate and the locking block, wherein the elastic member is a spring, and the spring is sleeved on the limiting portion; the limiting portion comprises a reference ring and a rotating ring, wherein the reference ring is connected to the locking block, and the rotating ring is connected to the abutment plate; The rotating ring is inserted into the reference ring.

9. The housing assembly according to claim 8, wherein: One of the rotating ring and the reference ring is provided with a slideway, and the other is provided with a slider; the slideway extends in a circumferential spiral around the rotating ring or the reference ring on which it is provided; the rotating ring moves in the reference ring along the axial direction of the spring, and the slider slides in the slideway.

10. The housing assembly according to claim 7, wherein: A lifting ring is further provided between the abutting plate and the convex bump, and the lifting ring is sleeved on the elastic member.

11. The housing assembly according to any one of claims 1 to 10, characterized in that: A plurality of locking parts are provided between the mask top plate and the box body top plate, and the plurality of locking parts are arranged at intervals around the flue opening of the outer shell assembly.

12. A water heater, characterized in that: The water heater comprises a housing assembly as claimed in any one of claims 1-11.

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