An electric water heater and a leakage alarm system thereof

Abstract

The utility model provides a kind of electric water heater and its electric leakage alarm system, and electric leakage alarm system includes anti-electricity wall cover shell and sound production module, anti-electricity wall cover shell is configured to be connected with the shell body of electric water heater, the sound guide hole is provided on the anti-electricity wall cover shell;Sound production module is configured to emit electric leakage alarm sound, the sound production module is installed in the anti-electricity wall cover shell and corresponds to the sound guide hole.The utility model sets up sound guide hole on anti-electricity wall cover shell, and the sound production module for emitting electric leakage alarm sound is installed in anti-electricity wall cover shell and corresponds to the position of sound guide hole, since when installing electric water heater, anti-electricity wall cover shell is not blocked, therefore, electric leakage alarm sound can be propagated to external space through the sound guide hole of anti-electricity wall cover shell, improve warning effect, avoid the appearance of security risk.

Description

Technical Field

[0001] This utility model relates to the field of electric water heater technology, and in particular to an electric water heater and its leakage alarm system. Background Technology

[0002] Electric water heaters are devices that use electricity to turn cold water into hot water within a certain time. Currently, electric water heaters have become a common household appliance. However, after long-term use, if an electric water heater ages or its insulation is damaged due to other reasons, it will pose a risk of electric leakage. Once an electric water heater leaks electricity, the ground wire will become live. Therefore, checking whether the ground wire is live is the main way to determine whether an electric water heater is energized.

[0003] In existing technologies, after detecting that the ground wire is live, an alarm module, code alarm module, graphic alarm module, or light alarm module is usually used to alert the user that the electric water heater is leaking electricity and to pay attention to safety.

[0004] However, most electric water heaters are currently installed in a concealed or semi-concealed manner, with the alarm module typically installed inside the casing. The casing's obstruction, combined with the concealed or semi-concealed installation method, significantly weakens the alarm module's warning effect. This is especially problematic for elderly users; when the warning is not clearly visible, it is difficult to attract their attention, leading to potential safety hazards.

[0005] In view of the above, this utility model is hereby proposed. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome at least some of the shortcomings of the prior art and provide a leakage alarm system for electric water heaters. By setting a sound guide hole on the anti-electric wall cover and installing a sound-emitting module for emitting leakage alarm sound inside the anti-electric wall cover and corresponding to the position of the sound guide hole, since the anti-electric wall cover is not blocked when the electric water heater is installed, the leakage alarm sound can be transmitted to the external space through the sound guide hole of the anti-electric wall cover, improving the warning effect and avoiding safety hazards.

[0007] To solve the above-mentioned technical problems, the first aspect of this utility model is to provide a leakage alarm system for electric water heaters, comprising:

[0008] An anti-electric shock wall cover, configured to connect to the outer casing of an electric water heater, wherein the anti-electric shock wall cover is provided with sound guiding holes; and

[0009] A sound-emitting module is configured to emit a leakage current alarm sound. The sound-emitting module is installed inside the anti-electric shock wall cover and corresponds to the sound guide hole.

[0010] In some embodiments, the anti-electric shock wall enclosure includes a front side plate and a bottom plate connected in sequence, and the sound guide hole is disposed on the bottom plate;

[0011] The sound-generating module is installed on the inner side of the base plate and directly opposite the sound guide hole.

[0012] In some embodiments, a first fastening structure is provided on the inner side of the base plate, and a second fastening structure is provided on the sound-generating module, wherein the first fastening structure and the second fastening structure are fastened together.

[0013] In some embodiments, at least one limiting plate is provided on the inner side of the base plate, and the limiting plate abuts against the outer wall of the sound-generating module.

[0014] In some implementations, the leakage alarm system for the electric water heater also includes a display panel back cover;

[0015] The rear shell of the display panel is installed on the back of the front side panel, and together with the front side panel, they form a receiving cavity. The receiving cavity is configured to house the display panel and the sound driving board for the electric water heater.

[0016] The sound-generating driver board is electrically connected to the display board and the sound-generating module.

[0017] In some embodiments, the rear shell of the display panel has an open structure, and a first wire outlet hole is provided on the side wall of the rear shell of the display panel. The electrical connection wire between the sound driving board and the sound module passes through the first wire outlet hole.

[0018] In some implementations, the leakage alarm system for electric water heaters also includes a leakage indicator light;

[0019] The front panel has a light guide hole, and the inner side of the front panel has an indicator light mounting bracket. The leakage current indicator light is installed in the indicator light mounting bracket and corresponds to the light guide hole.

[0020] In some embodiments, the indicator light mounting bracket is a hollow columnar structure, and after the leakage current indicator light is installed in the indicator light mounting bracket, at least a portion of the leakage current indicator light is visible through the light guide hole.

[0021] In some implementations, the leakage current indicator light is grounded through the wall;

[0022] The base plate has a second outlet hole, and the grounding wire of the leakage indicator light passes through the second outlet hole.

[0023] The second aspect of this utility model is to provide an electric water heater, including a leakage alarm system according to the above-described electric water heater.

[0024] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art.

[0025] (1) The leakage alarm system for electric water heater provided by this utility model sets a sound guide hole on the anti-electric wall cover and installs the sound-emitting module for emitting leakage alarm sound inside the anti-electric wall cover and corresponding to the position of the sound guide hole. Since the anti-electric wall cover is not blocked when the electric water heater is installed, the leakage alarm sound can be transmitted to the external space through the sound guide hole of the anti-electric wall cover, thereby improving the warning effect and avoiding safety hazards.

[0026] (2) The leakage alarm system of the electric water heater provided by this utility model prevents the sound-generating module from loosening due to vibration by abutting a limiting plate on the outer wall of the sound-generating module.

[0027] (3) The leakage alarm system for electric water heater provided by this utility model reduces voltage fluctuations during operation of the electric water heater by making the sound driving board for driving the sound module to emit sound independent of the display board of the electric water heater. This enhances the anti-interference ability of the entire component. Moreover, when a fault occurs, both can be replaced or repaired separately, saving maintenance costs.

[0028] (4) The leakage alarm system for electric water heater provided by this utility model provides a light guide hole on the front side plate of the anti-electric wall cover, and installs the leakage indicator light for emitting leakage indicator light in the indicator light mounting bracket and corresponding to the position of the light guide hole. Since the anti-electric wall cover will not be blocked when the electric water heater is installed, the leakage indicator light can be transmitted to the external space through the light guide hole of the anti-electric wall cover, and combined with the leakage alarm sound, further improves the warning effect. Attached Figure Description

[0029] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0030] Figure 1 This is a structural schematic diagram of an electric water heater provided by this utility model;

[0031] Figure 2 This is a structural schematic diagram of a leakage alarm system for an electric water heater according to the present invention;

[0032] Figure 3 yes Figure 2 Enlarged view of section I in the image;

[0033] Figure 4 yes Figure 2 Enlarged view of section II in the image;

[0034] Figure 5 yes Figure 2 Exploded view of the structure;

[0035] Figure 6 This is a schematic diagram of the leakage alarm system for an electric water heater provided by this utility model.

[0036] In the picture: 100, electric water heater;

[0037] 10. Outer shell; 11. Water inlet pipe; 12. Water outlet pipe;

[0038] 20. Anti-electric shock wall cover structure; 21. Anti-electric shock wall cover shell; 211. Front side plate; 212. Base plate; 213. Sound guide hole; 214. First fastening structure; 215. Limiting plate; 217. Second cable outlet hole; 218. Indicator light mounting bracket; 219. Light guide hole; 22. Display panel rear shell; 221. First cable outlet hole;

[0039] 30. Display panel;

[0040] 40. Sound driver board;

[0041] 50. Sound-generating module; 51. Second fastening structure;

[0042] 60. Leakage indicator light; 61. Grounding wire.

[0043] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0045] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] As described in the background section, existing electric water heaters are mostly installed in a concealed or semi-concealed manner, with the leakage alarm module typically installed inside the casing. This weakens the warning effect of the alarm module. Especially for elderly users, the lack of a clear warning can easily attract their attention, leading to potential safety hazards. Therefore, this invention provides a leakage alarm system for electric water heaters. By setting a sound-guiding hole on the anti-electric shock wall casing and installing a sound-emitting module for emitting leakage alarm sounds inside the casing, corresponding to the position of the sound-guiding hole, the leakage alarm sound can be transmitted to the external space through the sound-guiding hole during water heater installation. This improves the warning effect and prevents potential safety hazards.

[0048] The preferred technical solution of the electric water heater 100 and its anti-electric shock wall system provided by this utility model is described below with reference to the accompanying drawings.

[0049] Figure 1 This is a structural schematic diagram of an electric water heater 100 provided by this utility model; Figure 2 This is a structural schematic diagram of a leakage alarm system for an electric water heater 100 according to the present invention; Figure 3 yes Figure 2 Enlarged view of section I in the image; Figure 4 yes Figure 2 Enlarged view of section II in the image; Figure 5 yes Figure 2 Exploded view of the structure; Figure 6 This is a schematic diagram of the leakage alarm system for an electric water heater 100 provided by this utility model.

[0050] like Figures 1 to 6As shown, the electric water heater 100 includes a housing body 10 and end caps disposed at both ends of the housing body 10. The housing body 10 and the end caps form a first receiving cavity, inside which is an inner tank made of conductive iron. The inner tank is connected to an inlet pipe 11 and an outlet pipe 12. Insulating pipes are installed on the inlet pipe 11 and the outlet pipe 12. The function of the insulating pipes is to ensure that the voltage at the water outlet is below the safe voltage when the ground wire of the electric water heater 100 is energized, thus ensuring the safety of the bather. In other words, the aforementioned insulating pipes are the "anti-electric shock wall" of the electric water heater 100.

[0051] The front side of the outer casing 10 has positioning holes and screw holes for mounting the anti-electric shock wall cover structure 20. The anti-electric shock wall cover structure 20 can house the insulating tube inside. The anti-electric shock wall cover structure 20 includes an anti-electric shock wall cover shell 21 and a display panel rear shell 22 installed on the rear side of the anti-electric shock wall cover shell 21. The display panel rear shell 22 and the anti-electric shock wall cover shell 21 enclose a second receiving cavity, in which the display panel 30 of the electric water heater 100 and the sound driving plate 40 for driving the sound-generating module 50 to emit sound are located.

[0052] In the above solution, by making the sound driving board 40 used to drive the sound-generating module 50 to generate sound independent of the display board 30 of the electric water heater 100, the present invention can reduce voltage fluctuations during the operation of the electric water heater 100, enhance the anti-interference capability of the entire component, and, when a fault occurs, both can be replaced or repaired separately, saving maintenance costs.

[0053] As an example, when the sound-generating module 50 described above uses a speaker body, the corresponding sound-generating driver board 40 is a speaker driver board. When the sound-generating module 50 described above uses a buzzer body, the corresponding sound-generating driver board 40 is a buzzer driver board.

[0054] The outer shell body 10 can be a cylindrical structure, which can be understood as a hollow columnar structure with a cross-section perpendicular to the axis of the outer shell body 10. The cross-sectional shape can be any suitable shape such as a circle, ellipse, fan, polygon, or irregular shape.

[0055] The outer shell 10 can be processed in various ways. It can be made of plastic material through a one-time molding process. There are various types of one-time molding processes, such as injection molding and 3D printing. The outer shell 10 obtained by one-time molding has no gaps on its surface and has good mechanical properties. Compared with the welded shells in the prior art, since there are no welds, the surface transition can be smooth, the outer shell 10 is not easy to crack, and it has a better appearance.

[0056] The anti-electric shock wall cover 21 includes a front side plate 211 and a bottom plate 212 connected in sequence. The front side plate 211 is configured with a control panel for mounting the electric water heater 100, and the control panel is communicatively connected to the display panel 30. The bottom plate 212 is provided with a first mounting hole and a second mounting hole for the water inlet pipe 11 and the water outlet pipe 12 of the electric water heater 100 to pass through. Multiple locking claws are spaced along the length of the back side of the front side plate 211 away from the edge of the bottom plate 212. When installing the anti-electric shock wall cover 21, the locking claws are inserted into the positioning holes provided on the outer casing 10 of the electric water heater 100.

[0057] It should be noted that the aforementioned claws can only be used for the initial positioning of the anti-electric shock wall cover 21 on the outer shell body 10. After the claws are installed in the positioning hole, it is also necessary to fasten the anti-electric shock wall cover 21 and the outer shell body 10 to fix them together.

[0058] Specifically, screw posts are provided at the four corners of the base plate 212 of the anti-electric shock wall cover 21, and correspondingly, four screw holes are provided on the outer shell body 10. The screws are threaded into the screw posts and the outer shell body 10, thus firmly fixing the anti-electric shock wall cover 21. It is understood that the design of the screw posts allows the screws to be embedded within them, preventing them from protruding from the anti-electric shock wall cover 21 and improving the overall aesthetics of the electric water heater 100. It should be noted that, while ensuring the anti-electric shock wall cover 21 is securely fixed to the outer shell body 10, the number of screw posts and screw holes can be adjusted accordingly, and is not limited to the numbers listed in this embodiment.

[0059] Optionally, one side of the display panel rear shell 22 is snapped into the bottom plate 212 of the anti-electric shock wall cover 21, and the other side of the display panel rear shell 22 is connected to the front plate 211 of the anti-electric shock wall cover 21 by screws. This snap-fit ​​connection method occupies less space, increases the distance between the display panel rear shell 22 and the outer casing 10, and provides a certain amount of allowance for deformation of the outer casing 10 during the foaming process. This avoids interference between the outer casing 10 and the display panel rear shell 22, ensures the installation stability of the display panel rear shell 22, prevents the anti-electric shock wall cover 21 from being pushed up, and does not affect the aesthetics. At the same time, since the display panel rear shell 22 is not subjected to force, it ensures the safety of the control components and increases the safety of the electric water heater 100.

[0060] Specifically, a first latching protrusion is provided on the bottom side of the display panel rear shell 22, and a second latching protrusion is provided on the inner side of the bottom plate 212 of the anti-electric shock wall cover 21. The second latching protrusion has a latching groove, and the first latching protrusion is engaged in the latching groove. A mounting hole is provided on the upper side of the display panel rear shell 22, and a corresponding mounting hole is also provided on the front plate 211 of the anti-electric shock wall cover 21. The two mounting holes are connected by screws.

[0061] The following is a reference to the appendix. Figure 2 To be continued Figure 6 The specific structure of the leakage current alarm system of electric water heater 100 is described.

[0062] like Figures 2 to 6 As shown, the leakage current alarm system includes the aforementioned anti-electric shock wall cover 21 and a sound-emitting module 50. The anti-electric shock wall cover 21 is configured to be connected to the outer shell 10 of the electric water heater 100, and a sound guide hole 213 is provided on the anti-electric shock wall cover 21. The sound-emitting module 50 is configured to emit a leakage current alarm sound, and the sound-emitting module 50 is installed inside the anti-electric shock wall cover 21 and corresponds to the sound guide hole 213.

[0063] It should be noted that, referring to Figure 6 As shown, taking the sound-generating module 50 as an example with a speaker body, the sound-generating driver board 40 is electrically connected to the display board 30 and the sound-generating module 50. The display board 30 of the electric water heater 100 is connected to the inner tank of the electric water heater 100 through a first conductive plug to obtain leakage current. The circuit structure in the sound-generating module 50 is grounded through the wall. As an example, the first conductive plug is a 250 plug. When the electric water heater 100 leaks current to the point that the inner tank is energized, the leakage current will enter the inner tank of the electric water heater 100 in reverse from the common ground wire. The leakage current will flow through the display board 30, the sound-generating driver board 40, and the circuit structure in the sound-generating module 50 into the wall, forming a current loop. At this time, the sound-generating driver board 40 drives the sound-generating module 50 to emit a leakage alarm sound, such as "Leakage! Leakage!" The leakage alarm sound is propagated to the external space through the sound guide hole 213 opened on the anti-electric wall cover 21. Since the anti-electric shock enclosure 21 is generally not obstructed during the installation of the electric water heater 100, the intensity of the leakage alarm sound will not be weakened by obstruction. This effectively improves the warning effect and avoids potential safety hazards. Especially for elderly customers, the strong leakage alarm sound can draw their attention and improve their electrical safety.

[0064] As an example, the sound guide hole 213 includes several small sound guide holes centrally arranged and penetrating the base plate 212 of the anti-electric wall cover 21. This can disperse the sound wave propagation path of the leakage alarm sound, reduce the sound pressure concentration phenomenon caused by a single hole, reduce high-frequency distortion, and improve the uniform diffusion capability of mid- and low-frequency signals. Here, the sound guide hole 213 can be understood as a speaker hole.

[0065] Furthermore, such as Figure 2 and Figure 5 As shown, the aforementioned sound guide hole 213 is set on the base plate 212 of the anti-electric wall cover 21; while the sound-generating module 50 is installed on the inner side of the base plate 212 and directly opposite the sound guide hole 213, which can further improve the propagation effect of the leakage alarm sound.

[0066] In some implementations, refer to Figure 3 As shown, a first fastening structure 214 protrudes from the inner side of the base plate 212, and a second fastening structure 51 is provided on the sound-generating module 50. The first fastening structure 214 and the second fastening structure 51 are fastened together to achieve a fixed connection between the sound-generating module 50 and the base plate 212.

[0067] As an example, the first fastening structure 214 consists of two first screw posts protruding from the inner side of the base plate 212, and the second fastening structure 51 consists of two second screw posts disposed on the sound-generating module 50. When installing the sound-generating module 50, the two first screw posts and the two second screw posts are aligned one by one, and then the two are fixedly connected by screws.

[0068] It should be noted that, while ensuring that the sound-generating module 50 is securely fixed on the base plate 212, the number of the first screw post and the second screw post can be increased or decreased adaptively, and is not limited to the number listed in this embodiment.

[0069] In some embodiments, at least one limiting plate 215 is provided on the inner side of the base plate 212, and the limiting plate 215 abuts against the outer side wall of the sound-generating module 50, which can prevent the sound-generating module 50 from becoming loose due to vibration.

[0070] As an example, three to four limiting plates 215 can be set along the circumference of the sound-generating module 50. For example, limiting plates 215 can be set in pairs around the sound-generating module 50 to constrain the vibration of the sound-generating module 50 in the front-back and left-right directions.

[0071] In some implementations, refer to Figure 5 As shown, the rear shell 22 of the display panel has an open structure. A first wire outlet hole 221 is provided on the side wall of the rear shell 22 of the display panel. The electrical connection wire between the sound driving board 40 and the sound module 50 passes through the first wire outlet hole 221.

[0072] In the above solution, the first cable outlet 221 is located on the side wall of the rear shell 22 of the display panel. This facilitates the arrangement of the electrical connection cable between the sound driver board 40 and the sound module 50, shortens the physical distance between them, reduces the number of cable bends, and avoids signal attenuation or line wear caused by complex wiring. Furthermore, the opening on the side wall of the rear shell 22 of the display panel makes the cable more easily exposed in the operable area, facilitating troubleshooting or component replacement.

[0073] In some implementations, refer to Figure 2 and Figure 4As shown, the leakage current alarm system also includes a leakage current indicator light 60; wherein, a light guide hole 219 is provided on the front side plate 211, and an indicator light mounting bracket 218 is provided on the inner side of the front side plate 211, and the leakage current indicator light 60 is installed in the indicator light mounting bracket 218 and corresponds to the light guide hole 219. As an example, the leakage current indicator light 60 is a neon bulb or an LED light.

[0074] It should be noted that, referring to Figure 6 As shown, one end of the leakage indicator light 60 is connected to the inner tank of the electric water heater 100 via a first conductive plug to obtain leakage current, and the other end is connected to the wall via a second conductive plug to ground. As an example, the second conductive plug is a circular plug. When the electric water heater 100 leaks current to the point that the inner tank becomes energized, the leakage current will flow in reverse from the common ground wire into the inner tank of the electric water heater 100. The leakage current will then flow through the leakage indicator light 60 and the conductive plug into the wall, forming a current loop. At this time, the leakage indicator light 60 will be illuminated. The light from the leakage indicator light 60 is transmitted to the external space through the light guide hole 219 opened on the anti-electric wall cover 21. Since the front panel 211 of the anti-electric wall cover 21 is generally not obstructed during the installation of the electric water heater 100, the light of the leakage indicator light 60 will not be weakened due to obstruction, which effectively improves the warning effect and avoids potential safety hazards.

[0075] In the above solution, the leakage indicator light 60 is combined with the leakage alarm sound to provide a dual auditory and visual leakage warning, further improving the warning effect and enhancing the safety performance of the electric water heater 100.

[0076] In some implementations, refer to Figure 5 As shown, a second outlet hole 217 is provided on the base plate 212. The grounding wire 61 of the leakage current indicator 60 passes through the second outlet hole 217. This allows the second outlet hole 217 to be close to the wall, shortening the length of the grounding wire 61 and ensuring that the leakage current can be quickly conducted to the ground, thus improving the leakage protection efficiency. Furthermore, the proximity of the grounding wire 61 to the wall avoids electromagnetic interference generated by the high-frequency circuit or heating element inside the electric water heater 100, preventing false alarms or malfunctions of the leakage current indicator 60 due to signal interference. In addition, the proximity of the second outlet hole 217 to the wall conforms to the conventional path of building electrical wiring (such as concealed grounding terminals), making it easier for installers to connect the grounding wire 61 according to standard operating procedures, reducing the installation error rate.

[0077] In some embodiments, the indicator light mounting bracket 218 is a hollow columnar structure. After the leakage indicator light 60 is installed in the indicator light mounting bracket 218, at least part of the leakage indicator light 60 is visible through the light guide hole 219. This can further improve the propagation path of the light from the leakage indicator light 60 and avoid light attenuation.

[0078] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A leakage current alarm system for an electric water heater, characterized in that, include: An anti-electric shock wall cover is configured to connect to the outer shell of an electric water heater, and the anti-electric shock wall cover is provided with a sound guide hole; as well as A sound-emitting module is configured to emit a leakage current alarm sound. The sound-emitting module is installed inside the anti-electric shock wall cover and corresponds to the sound guide hole.

2. The leakage alarm system for an electric water heater according to claim 1, characterized in that, The anti-electric wall cover includes a front side plate and a bottom plate connected in sequence, and the sound guide hole is disposed on the bottom plate; The sound-generating module is installed on the inner side of the base plate and directly opposite the sound guide hole.

3. The leakage alarm system for an electric water heater according to claim 2, characterized in that, The inner side of the base plate is provided with a first fastening structure, and the sound-generating module is provided with a second fastening structure. The first fastening structure and the second fastening structure are fastened together.

4. The leakage alarm system for an electric water heater according to claim 2, characterized in that, At least one limiting plate is provided on the inner side of the base plate, and the limiting plate abuts against the outer wall of the sound-generating module.

5. The leakage alarm system for an electric water heater according to any one of claims 2 to 4, characterized in that, The sound guide hole includes a number of small sound guide holes that are centrally arranged and penetrate the bottom plate of the anti-electric wall cover.

6. The leakage alarm system for an electric water heater according to any one of claims 2 to 4, characterized in that, It also includes the back cover of the display panel; The rear shell of the display panel is installed on the back of the front side panel, and together with the front side panel, they form a receiving cavity. The receiving cavity is configured to house the display panel and the sound driving board for the electric water heater. The sound-generating driver board is electrically connected to the display board and the sound-generating module.

7. The leakage alarm system for an electric water heater according to claim 6, characterized in that, The rear shell of the display panel has an open structure, and a first wire outlet hole is provided on the side wall of the rear shell of the display panel. The electrical connection wire between the sound driving board and the sound module passes through the first wire outlet hole.

8. The leakage alarm system for an electric water heater according to any one of claims 2 to 4, characterized in that, It also includes a leakage current indicator light; The front panel has a light guide hole, and the inner side of the front panel has an indicator light mounting bracket. The leakage current indicator light is installed in the indicator light mounting bracket and corresponds to the light guide hole.

9. The leakage alarm system for an electric water heater according to claim 8, characterized in that, The indicator light mounting bracket is a hollow columnar structure. After the leakage current indicator light is installed in the indicator light mounting bracket, at least a portion of the leakage current indicator light is visible through the light guide hole.

10. An electric water heater, characterized in that, Including a leakage alarm system for an electric water heater according to any one of claims 1 to 9.

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