Automatic water replenishing device and electric water heater

Abstract

This utility model relates to an automatic water replenishment device and an electric water heater, belonging to the field of water heaters. The automatic water replenishment device includes: a water storage tank with a water storage cavity and a water tank inlet communicating with the water storage cavity; a water replenishment tank mounted on the water storage tank, with a water replenishment cavity, an inlet and an outlet, both communicating with the water replenishment cavity; a water inlet structure mounted on the water replenishment tank and communicating with the inlet; and a water conveying structure connected to both the water storage tank and the water replenishment tank, with a water replenishment channel, and the outlet, the water replenishment channel, and the water tank inlet communicating sequentially. The automatic water replenishment device disclosed in this application achieves smooth water flow from the outside to the water storage cavity through the water replenishment tank, ensuring sufficient liquid in the water storage cavity.

Description

Technical Field

[0001] This utility model relates to the field of water heaters, and in particular to an automatic water replenishment device and an electric water heater. Background Technology

[0002] Electric water heaters generally consist of a heating element and a hot water pipe, both installed inside a storage tank. The heating element heats the water in the tank, while cold water traveling through the hot water pipe is heated by the hot water in the tank. However, traditional electric water heaters lack a water replenishment function, requiring frequent additions to the tank. This low level of automation negatively impacts the user experience. Utility Model Content

[0003] Therefore, it is necessary to provide an automatic water replenishment device and electric water heater to address the problems of traditional electric water heaters not having a water replenishment function, which requires frequent addition of water to the storage tank, has a low degree of automation, and affects the user experience.

[0004] An automatic water replenishment device includes: a water storage tank having a water storage cavity and a water tank inlet communicating with the water storage cavity; a water replenishment tank disposed on or adjacent to the water storage tank, the water replenishment tank having a water replenishment cavity, an inlet and an outlet, both communicating with the water replenishment cavity; a water inlet structure disposed on the water replenishment tank and communicating with the inlet; and a water conveying structure connected to both the water storage tank and the water replenishment tank, the water conveying structure having a water replenishment channel, and the outlet, the water replenishment channel, and the water tank inlet communicating sequentially.

[0005] The first aspect of this application discloses an automatic water replenishment device. The device, with a replenishment tank mounted on a water storage tank, features a rational overall layout, occupies minimal space, and is easy to install and maintain. By incorporating a replenishment chamber within the replenishment tank and a replenishment channel in the water delivery structure, it automatically replenishes water to the storage chamber without manual intervention, improving ease of use and automation, and enhancing the user experience. The replenishment chamber design prevents insufficient water supply in the storage chamber due to momentary insufficient replenishment, which could affect the heating of cold water in the hot water pipes, or excessive replenishment leading to uncontrolled water levels and equipment safety issues. The sequential connection of the inlet structure, water inlet, replenishment chamber, outlet, replenishment channel, and water tank replenishment port ensures smooth water flow from the outside to the storage chamber, improving system reliability. This automatic water replenishment device optimizes the structural layout and replenishment process while ensuring the water replenishment function, enhancing the automation level of the electric water heater and the user experience.

[0006] In one embodiment, the water storage tank is provided with a vent communicating with the water storage chamber. The water replenishment tank is disposed on the water storage tank and located at the vent. The water replenishment chamber is connected to the vent, allowing steam in the water storage chamber to be transported into the water replenishment chamber. Steam in the water storage tank can enter the water replenishment chamber through the vent, automatically regulating the internal air pressure of the water storage tank to achieve pressure balance, ensuring smooth water flow and equipment safety. Furthermore, the water replenishment tank also has both water replenishment and steam condensation reflux functions.

[0007] In one embodiment, the water storage tank is made of plastic. By using plastic for both the water storage tank and the water heater's outer casing, the water storage tank is not pressurized and has lower strength requirements, significantly reducing costs. Furthermore, the water heater can be made in various shapes, such as square, compared to traditional water heaters which must be cylindrical due to pressure limitations, offering more design options.

[0008] In one embodiment, a water level detection device is also included, which is mounted on the water supply tank and is used to detect the water level in the water supply chamber. By monitoring the water level in the water supply chamber in real time, the device prevents the water level from becoming too high or too low. The water level detection data can be used to automatically control the start and stop of the water inlet structure, achieving precise adjustment of the water level in the water supply chamber, ensuring sufficient water supply while preventing the risk of overflow due to excessive water volume.

[0009] In one embodiment, the water supply tank is provided with an assembly hole, and the water level detection device is mounted on the water supply tank and located at the assembly hole. The assembly hole provides a mounting base for the water level detection device. This design improves the stability and reliability of the water level detection device.

[0010] In one embodiment, the water level detection device is a probe-type water level detection device. Because the probe-type water level detection device directly contacts the water body for detection, it has strong anti-interference capabilities and can accurately identify the actual water level in the water replenishment chamber, avoiding misjudgments.

[0011] In one embodiment, the water inlet structure includes a first water inlet component, a solenoid valve, and a second water inlet component. The first water inlet component, the solenoid valve, and the second water inlet component are connected sequentially. The second water inlet component is connected to the water replenishment tank and communicates with the water inlet. The solenoid valve is used to control the opening or closing of the water path between the first water inlet component and the second water inlet component. Through the switching control of the solenoid valve, precise opening or closing of the water inlet path is achieved, ensuring timely response and reliable operation during the water replenishment process. As a core component of water path control, the solenoid valve effectively prevents accidental leakage in non-replenishment states, improving the overall sealing performance of the system.

[0012] In one embodiment, the system further includes a water level detection device and a control system. The water level detection device is mounted on the water supply tank and located within the water supply chamber. The control system is electrically connected to both the water level detection device and the solenoid valve. By receiving the water level signal from the water level detection device in real time and rapidly adjusting the solenoid valve's state, the control system closes the solenoid valve when the water level reaches a predetermined level, stopping the water supply to the tank. This design effectively prevents abnormal water supply situations and avoids safety hazards such as overflow or insufficient water supply.

[0013] In one embodiment, the outer side of the water supply tank is provided with a groove that mates with the second water inlet component. This groove-to-water inlet design reduces the space occupied by the second water inlet component, making the overall layout more compact. Furthermore, it improves the stability and reliability of the water inlet structure.

[0014] In one embodiment, the water replenishment tank includes a water replenishment tank body and a cover assembly. The water replenishment tank body is disposed on the water storage tank body, and has the water replenishment cavity and the outlet. The water replenishment tank body has an opening communicating with the water replenishment cavity. The cover assembly is disposed on the water replenishment tank body and located at the opening, and has the water inlet. The cover assembly covers the opening of the water replenishment tank body, forming a closed water replenishment cavity to prevent liquid leakage or the entry of external contaminants, ensuring the cleanliness of the water replenishment tank. The water inlet allows water from the inlet structure to enter the water replenishment cavity.

[0015] In one embodiment, a float valve assembly is further included. The float valve assembly includes a support structure and a valve core structure. The support structure is movably mounted on the water supply tank body and located within the water supply chamber. The support structure is movable relative to the water supply tank body, and when movable relative to the water supply tank body, it has at least a first position and a second position. The valve core structure is mounted on the support structure. When the support structure is in the first position, the valve core structure blocks the water inlet. When the support structure is in the second position, the water inlet communicates with the water supply chamber. The automatic opening and closing of the water inlet is achieved through the mechanical action of the float valve assembly. The water inlet state is autonomously adjusted according to changes in the water level in the water supply chamber. When the water level reaches a set height, the valve core structure directly and physically blocks the water inlet, ensuring that the water level is maintained within a reasonable range. This design can mechanically seal the water inlet after the water level detection device or solenoid valve fails, preventing continued water flow and overflow.

[0016] In one embodiment, the cover assembly includes a water injection plate and a limiting member. The water injection plate is disposed on the water supply tank body and has the water injection port. The limiting member is disposed on the water injection plate. The support structure has adapter holes. The number of limiting members and adapter holes are the same, and the limiting members and adapter holes correspond one-to-one. The cooperation between the limiting members and adapter holes provides a precise movement trajectory for the support structure, ensuring that the float valve assembly does not deviate during lifting and lowering, and allowing the valve core structure to be accurately aligned with the water injection port. This design improves the reliability of the float valve assembly.

[0017] In one embodiment, the water level detection device is a capacitive sensing water level detection device. Capacitive sensing water level detection does not require direct contact with the water body, avoiding probe corrosion or scaling problems, and is particularly suitable for stable operation in humid environments over long periods.

[0018] An electric water heater includes: a housing assembly; and the aforementioned automatic water replenishment device, wherein the automatic water replenishment device is disposed on the housing assembly.

[0019] The second aspect of this application discloses an electric water heater that automatically replenishes water to the storage chamber of the water tank without manual intervention, improving convenience and automation, and enhancing the user experience. This design ensures a continuous water flow during the operation of the electric water heater. Attached Figure Description

[0020] Figure 1 A first perspective view of the automatic water replenishment device;

[0021] Figure 2 This is a second perspective view of the automatic water replenishment device;

[0022] Figure 3 First exploded view of the automatic water replenishment device;

[0023] Figure 4 The second exploded view of the automatic water replenishment device;

[0024] Figure 5 A 3D view of the water replenishment tank;

[0025] Figure 6 The first exploded view of the water replenishment tank;

[0026] Figure 7 The second exploded view of the water replenishment tank;

[0027] Figure 8 A perspective view of the cover assembly and the float valve assembly;

[0028] Figure 9 Exploded view of the cover assembly and float valve assembly;

[0029] Figure 10 This is a three-dimensional view of the cover assembly;

[0030] Figure 11 A 3D view of the float valve assembly;

[0031] Figure 12 A three-dimensional view of the water inlet structure;

[0032] Figure 13 A three-dimensional view of the water storage tank;

[0033] Figure 14 This is an exploded view of the water storage tank.

[0034] Figure 15 This is a 3D diagram of an electric water heater.

[0035] The correspondence between the reference numerals and the component names is as follows:

[0036] 1. Water storage tank body, 101. Water storage cavity, 102. Water tank inlet, 103. Vent hole;

[0037] 2 Water supply tank body, 21 Water supply tank body, 22 Cover assembly, 221 Water injection plate, 222 Limiting component, 201 Water supply cavity, 202 Water injection port, 203 Output port, 204 Assembly hole, 205 Groove, 206 Opening.

[0038] 3. Water inlet structure, 31. First water inlet component, 32. Solenoid valve, 33. Second water inlet component;

[0039] 4. Water conveyance structure;

[0040] 5. Water level detection device;

[0041] 6 float valve assembly, 61 support structure, 62 valve core structure, 601 adapter hole;

[0042] 100 housing assembly. Detailed Implementation

[0043] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0044] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0045] Example 1

[0046] like Figure 1-14 As shown in the figure, this embodiment discloses an automatic water replenishment device, including: a water storage tank 1, the water storage tank 1 having a water storage cavity 101, the water storage tank 1 having a water tank replenishment port 102 communicating with the water storage cavity 101; and a water replenishment tank 2, the water replenishment tank 2 being disposed on the water storage tank 1 or adjacent to the water storage tank 1, the water replenishment tank 2 having a water replenishment cavity 201, and the water replenishment tank 2 having a water inlet 202 and an outlet 2. 03, the water inlet 202 and the outlet 203 are both connected to the water replenishment chamber 201; the water inlet structure 3 is disposed on the water replenishment tank 2 and is connected to the water inlet 202; the water conveying structure 4 is connected to the water storage tank 1 and the water replenishment tank 2 respectively, the water conveying structure 4 is provided with a water replenishment channel, and the outlet 203, the water replenishment channel and the water tank inlet 102 are connected in sequence.

[0047] The first aspect of this application discloses an automatic water replenishment device, which is installed on a water storage tank 1 via a water replenishment tank 2. The overall layout is reasonable, occupies little space, and is easy to install and maintain. By setting up a water replenishment chamber 201 in the water replenishment tank 2 and a water replenishment channel in the water delivery structure 4, water can be automatically replenished to the water storage chamber 101 of the water storage tank 1 without manual intervention, improving ease of use and automation, and enhancing the user experience. The water replenishment chamber 201 in the water replenishment tank 2 avoids insufficient water supply in the water storage chamber 101 due to insufficient instantaneous water replenishment, which could affect the heating of cold water in the hot water pipe, or excessive water replenishment leading to uncontrolled water levels and equipment safety issues. The sequential connection of the water inlet structure 3, water inlet 202, water replenishment chamber 201, outlet 203, water replenishment channel, and water tank replenishment port 102 ensures smooth water flow from the outside to the water storage chamber 101, improving system reliability. The automatic water replenishment device of this application optimizes the structural layout and water replenishment process while ensuring the water replenishment function, thereby improving the automation level of the electric water heater and the user experience.

[0048] like Figure 3-4 and Figure 13-14 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the water storage tank 1 is provided with a vent 103 communicating with the water storage cavity 101; the water replenishment tank 2 is disposed on the water storage tank 1 and located at the vent 103; the water replenishment cavity 201 communicates with the vent 103; and steam in the water storage cavity 101 can be transported to the water replenishment cavity 201. Steam in the water storage tank 1 can enter the water replenishment cavity 201 through the vent 103, automatically adjusting the internal air pressure of the water storage tank 1 to achieve pressure balance, ensuring smooth water flow and equipment safety. Furthermore, the water replenishment tank 2 also has both water replenishment and steam condensation reflux functions.

[0049] In addition to the features of the above embodiments, this embodiment further specifies that the water storage tank 1 is made of plastic. Because both the water storage tank 1 and the outer shell of the water heater are made of plastic, the water storage tank 1 is not pressurized and has low strength requirements, which can significantly save costs. Furthermore, the water heater can be made in various shapes, such as square, compared to traditional water heaters which must be cylindrical due to pressure limitations, providing more choices in appearance.

[0050] like Figure 5As shown, in addition to the features of the above embodiments, this embodiment further includes a water level detection device 5, which is installed on the water supply tank 2 and is used to detect the water level in the water supply chamber 201. By monitoring the water level in the water supply chamber 201 in real time through the water level detection device 5, excessively high or low water levels can be avoided. The water level detection data can be used to automatically control the start and stop of the water inlet structure 3, achieving precise adjustment of the water level in the water supply chamber 201, ensuring sufficient water in the water supply chamber 201 while preventing the risk of overflow due to excessive water in the water supply chamber 201.

[0051] like Figure 5 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the water replenishment tank 2 is provided with an assembly hole 204, and the water level detection device 5 is disposed on the water replenishment tank 2 and located at the assembly hole 204. The assembly hole 204 provides an assembly basis for the water level detection device 5. This design improves the stability and reliability of the water level detection device 5.

[0052] In addition to the features of the above embodiments, this embodiment further specifies that the water level detection device 5 is a probe-type water level detection device. By using a probe-type water level detection device, the device directly contacts the water body for detection, exhibiting strong anti-interference capabilities and accurately identifying the actual water level within the water replenishment chamber 201, thus avoiding misjudgment.

[0053] In addition to the features of the above embodiments, this embodiment further specifies that: the water inlet structure 3 includes a first water inlet component 31, a solenoid valve 32, and a second water inlet component 33. The first water inlet component 31, the solenoid valve 32, and the second water inlet component 33 are connected in sequence. The second water inlet component 33 is connected to the water replenishment tank 2 and communicates with the water inlet 202. The solenoid valve 32 is used to control the water flow between the first water inlet component 31 and the second water inlet component 33. By controlling the opening and closing of the solenoid valve 32, the precise opening or closing of the water inlet path can be achieved, ensuring timely response and reliable operation during the water replenishment process. As a core component of water flow control, the solenoid valve 32 can effectively prevent accidental leakage in non-water replenishment states and improve the overall sealing performance of the system.

[0054] like Figure 5As shown, in addition to the features of the above embodiments, this embodiment further includes a water level detection device 5 and a control system. The water level detection device 5 is mounted on the water supply tank 2 and located within the water supply cavity 201. The control system is electrically connected to both the water level detection device 5 and the solenoid valve 32. By electrically connecting the control system to the water level detection device 5 and the solenoid valve 32, the control system receives the water level signal from the water level detection device 5 in real time and quickly adjusts the state of the solenoid valve 32. When the water level detection device 5 detects that the water level has reached a predetermined level, it closes the solenoid valve 32 to stop water injection into the water supply tank 2. This design effectively prevents abnormal water supply situations and avoids safety hazards such as overflow or insufficient water supply.

[0055] like Figure 5 and Figure 6 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the outer side of the water replenishment tank 2 is provided with a groove 205, which can cooperate with the second water inlet component 33. The cooperation design between the groove 205 and the second water inlet component 33 reduces the space occupied by the second water inlet component 33, making the overall layout more compact. Moreover, it improves the stability and reliability of the water inlet structure 3.

[0056] like Figure 6 and Figure 7 As shown, in addition to the features of the above embodiments, this embodiment further defines: the water replenishment tank 2 includes a water replenishment tank body 21 and a cover assembly 22. The water replenishment tank body 21 is disposed on the water storage tank 1. The water replenishment tank body 21 has the water replenishment cavity 201 and the outlet 203. The water replenishment tank body 21 has an opening 206 communicating with the water replenishment cavity 201. The cover assembly 22 is disposed on the water replenishment tank body 21 and located at the opening 206. The cover assembly 22 has the water inlet 202. The cover assembly 22 covers the opening 206 of the water replenishment tank body 21, forming a closed water replenishment cavity 201 to prevent liquid leakage or external contaminants from entering, ensuring the cleanliness of the water replenishment tank 2. The water inlet 202 allows water from the water inlet structure 3 to enter the water replenishment cavity 201.

[0057] like Figure 8-9 and Figure 11As shown, in addition to the features of the above embodiments, this embodiment further includes a float valve assembly 6, which comprises a support structure 61 and a valve core structure 62. The support structure 61 is movably disposed on the water supply tank body 21 and located within the water supply chamber 201. The support structure 61 is movable relative to the water supply tank body 21, and when it moves relative to the water supply tank body 21, it has at least a first position and a second position. The valve core structure 62 is disposed on the support structure 61. When the support structure 61 is in the first position, the valve core structure 62 blocks the water inlet 202. When the support structure 61 is in the second position, the water inlet 202 communicates with the water supply chamber 201. The automatic opening and closing of the water inlet 202 is achieved through the mechanical action of the float valve assembly 6, and the water inlet state is autonomously adjusted according to the water level change in the water supply chamber 201. When the water level reaches a set height, the valve core structure 62 directly and physically blocks the water inlet 202 to ensure that the water level is maintained within a reasonable range. This design enables the mechanical sealing of the water inlet 202 after the water level detection device 5 or the solenoid valve 32 fails, preventing water from continuing to flow in and causing overflow.

[0058] like Figure 8-10 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the cover assembly 22 includes a water injection plate 221 and a limiting member 222. The water injection plate 221 is disposed on the water replenishment tank body 21, and the water injection plate 221 has the water injection port 202. The limiting member 222 is disposed on the water injection plate 221, and the support structure 61 has an adapter hole 601. The number of limiting members 222 and the number of adapter holes 601 are the same, and the limiting members 222 and the adapter holes 601 are matched one-to-one. The matching of the limiting member 222 and the adapter hole 601 provides a precise movement trajectory for the support structure 61, ensuring that the float valve assembly 6 does not deviate during the lifting and lowering process, and enabling the valve core structure 62 to be accurately aligned with the water injection port 202. This design improves the reliability of the float valve assembly 6.

[0059] Example 2

[0060] The water level detection device 5 is a capacitive sensing water level detection device. Capacitive sensing water level detection does not require direct contact with the water body, avoiding probe corrosion or scaling problems, and is particularly suitable for long-term stable operation in humid environments.

[0061] Example 3

[0062] like Figure 15 As shown, this embodiment discloses an electric water heater, including: a housing assembly 100; and the aforementioned automatic water replenishment device, which is disposed on the housing assembly 100.

[0063] The second aspect of this application discloses an electric water heater that automatically replenishes water to the water storage chamber 101 of the storage tank 1 through an automatic water replenishment device, without manual intervention. This improves the convenience and automation of use, enhancing the user experience. This design ensures a continuous water flow during the operation of the electric water heater.

[0064] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An automatic water replenishment device, characterized in that, include: A water storage tank (1) is provided with a water storage cavity (101) and a water tank inlet (102) that communicates with the water storage cavity (101). A water replenishment tank (2) is provided on the water storage tank (1) or adjacent to the water storage tank (1). The water replenishment tank (2) is provided with a water replenishment cavity (201). The water replenishment tank (2) is provided with a water inlet (202) and an outlet (203). The water inlet (202) and the outlet (203) are both connected to the water replenishment cavity (201). Water inlet structure (3), the water inlet structure (3) is installed on the water supply tank (2), and the water inlet structure (3) is connected to the water inlet (202); Water conveying structure (4) is connected to the water storage tank (1) and the water replenishment tank (2) respectively. The water conveying structure (4) is provided with a water replenishment channel. The output port (203), the water replenishment channel and the water tank water replenishment port (102) are connected in sequence.

2. The automatic water replenishment device according to claim 1, characterized in that, The water storage tank (1) is provided with a vent (103) communicating with the water storage cavity (101). The water replenishment tank (2) is provided on the water storage tank (1) and located at the vent (103). The water replenishment cavity (201) is communicating with the vent (103). The steam in the water storage cavity (101) can be transported to the water replenishment cavity (201). And / or the water storage tank (1) is made of plastic.

3. The automatic water replenishment device according to claim 1, characterized in that, It also includes a water level detection device (5), which is installed on the water supply tank (2) and is used to detect the water level height of the water supply chamber (201).

4. The automatic water replenishment device according to claim 3, characterized in that, The water supply tank (2) is provided with an assembly hole (204), and the water level detection device (5) is installed on the water supply tank (2) and located at the assembly hole (204); And / or the water level detection device (5) is a probe-type water level detection device; Alternatively, the water level detection device (5) may be a capacitive sensing water level detection device.

5. The automatic water replenishment device according to claim 1, characterized in that, The water inlet structure (3) includes a first water inlet component (31), a solenoid valve (32), and a second water inlet component (33). The first water inlet component (31), the solenoid valve (32), and the second water inlet component (33) are connected in sequence. The second water inlet component (33) is connected to the water supply tank (2) and is connected to the water inlet (202). The solenoid valve (32) is used to control the water flow between the first water inlet component (31) and the second water inlet component (33) to be open or closed.

6. The automatic water replenishment device according to claim 5, characterized in that, It also includes a water level detection device (5) and a control system. The water level detection device (5) is installed on the water supply tank (2) and located in the water supply cavity (201). The control system is electrically connected to the water level detection device (5) and the solenoid valve (32) respectively. And / or the outer side of the water supply tank (2) is provided with a groove (205) that can cooperate with the second water inlet (33).

7. The automatic water replenishment device according to claim 1, characterized in that, The water replenishment tank (2) includes a water replenishment tank body (21) and a cover assembly (22). The water replenishment tank body (21) is disposed on the water storage tank (1). The water replenishment tank body (21) is provided with the water replenishment cavity (201) and the outlet (203). The water replenishment tank body (21) is provided with an opening (206) communicating with the water replenishment cavity (201). The cover assembly (22) is disposed on the water replenishment tank body (21) and located at the opening (206). The cover assembly (22) is provided with the water inlet (202).

8. The automatic water replenishment device according to claim 7, characterized in that, It also includes a float valve assembly (6), which includes a support structure (61) and a valve core structure (62). The support structure (61) is movably disposed on the water supply tank body (21) and located within the water supply cavity (201). The support structure (61) is movable relative to the water supply tank body (21). When the support structure (61) moves relative to the water supply tank body (21), it has at least a first position and a second position. The valve core structure (62) is disposed on the support structure (61). When the support structure (61) is in the first position, the valve core structure (62) blocks the water inlet (202). When the support structure (61) is in the second position, the water inlet (202) communicates with the water supply cavity (201).

9. The automatic water replenishment device according to claim 8, characterized in that, The cover assembly (22) includes a water injection plate (221) and a limiting member (222). The water injection plate (221) is disposed on the water replenishment tank body (21) and has the water injection port (202). The limiting member (222) is disposed on the water injection plate (221). The support structure (61) has an adapter hole (601). The number of limiting members (222) and the number of adapter holes (601) are the same and the limiting members (222) and the adapter holes (601) are matched one-to-one.

10. An electric water heater, characterized in that, include: Housing assembly (100); The automatic water replenishment device as described in any one of claims 1-9, wherein the automatic water replenishment device is disposed on the housing assembly (100).

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