Water storage type electric water heater

Abstract

The utility model relates to the technical field of water heaters, in particular to a water storage type electric water heater which comprises a water tank, a water supplementing pipeline, a control valve and a liquid level sensor, the water supplementing pipeline is arranged on the water tank and provided with a water inlet and a water supplementing opening communicated with the water inlet, and the water inlet is used for being communicated with an external water source; the water replenishing port communicates with the water tank; the control valve is arranged in the water replenishing pipeline and is used for controlling the on-off of the water replenishing pipeline; the liquid level sensor is arranged in the water tank, used for detecting the water level in the water tank and electrically connected with the control valve; when the water level of the water tank reaches the first preset water level, the control valve is opened so that the water supplementing pipeline can be communicated, the water storage type electric water heater can conduct automatic water supplementing when the water tank lacks water, and therefore the heat exchange effect of water in the water tank and the heat exchange pipeline is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of water heaters, and in particular to a water storage type electric water heater. Background Art

[0002] Electric water heaters are divided into storage water heaters and instant water heaters. Storage water heaters exchange heat between the hot water in the water tank and the cold water flowing through the heat exchange pipeline. The water in the heat exchange pipeline is heated to the use temperature before being used by the user. Among them, the water in the water tank is lost due to the high temperature, and it is necessary to replenish water when the water level in the water tank is low. At present, water tank replenishment is generally done manually, which is prone to untimely replenishment, thereby affecting the heat exchange effect between the water in the water tank and the heat exchange pipeline. Utility Model Content

[0003] The purpose of the present application is to provide a water storage type electric water heater, which can automatically replenish water when the water tank is short of water, thereby ensuring the heat exchange effect between the water in the water tank and the heat exchange pipeline.

[0004] To this end, an embodiment of the present application provides a water storage electric water heater, comprising: a water tank; a water supply pipeline, arranged on the water tank, the water supply pipeline having a water inlet and a water supply port connected to the water inlet, the water inlet being used to connect to an external water source, and the water supply port being connected to the water tank; a control valve, arranged in the water supply pipeline, for controlling the on-off of the water supply pipeline; and a liquid level sensor, arranged in the water tank, for detecting the water level in the water tank, the liquid level sensor being electrically connected to the control valve; wherein, when the water level in the water tank reaches a first preset water level, the control valve is opened to connect the water supply pipeline.

[0005] In one possible implementation, the liquid level sensor has a first detection part and a second detection part, the height of the first detection part is lower than the height of the second detection part, the first detection part corresponds to a first preset water level, and the second detection part corresponds to a second preset water level; wherein, when the water level reaches the second preset water level, the liquid level sensor controls the control valve to close.

[0006] In a possible implementation, the storage-type electric water heater further includes an overflow pipe connected to the top of the water tank.

[0007] In one possible implementation, the control valve is a mixing valve, which includes a valve body, a baffle arranged on the valve body, and a driving member for driving the baffle to move, the valve body having a first inlet, a first outlet, and a second outlet, the first inlet is connected to the water inlet, and the first outlet is connected to the water replenishment port; the water storage electric water heater also includes a water outlet pipe connected to the second outlet, and the water outlet pipe has a water outlet; wherein the baffle includes a first position state and a second position state, when the baffle is in the first position state, the first inlet is connected to the first outlet and is isolated from the second outlet, and when the baffle is in the second position state, the first inlet is connected to the second outlet and is isolated from the first outlet.

[0008] In a possible implementation, the water storage electric water heater also includes a first heating component and a heat exchange pipeline arranged in the water tank, the first heating component is used to heat the water in the water tank; the valve body also has a second inlet, one end of the heat exchange pipeline is connected to the first inlet, and the other end is connected to the second inlet; wherein the baffle also includes a third position state, when the baffle is in the third position state, the first inlet and the second inlet are respectively connected to the second outlet, and the first inlet and the second inlet are respectively separated from the first outlet.

[0009] In a possible implementation, the baffle can be rotatably disposed on the valve body, and the baffle is provided with a water inlet hole, a water outlet hole and a connecting hole connecting the water inlet hole and the water outlet hole, the water inlet hole is used to connect the first inlet and / or the second inlet, and the water outlet hole is used to connect the first outlet or the second outlet.

[0010] In a possible implementation, when the blocking piece is in the third position, the communication opening between the water inlet hole and the first inlet and the second inlet is adjustable.

[0011] In a possible implementation, the water inlet and the water outlet are respectively arc structures with the rotation center of the baffle as the center of the circle.

[0012] In a possible implementation, the storage-type electric water heater further includes a second heating component disposed on the water outlet pipeline, and the second heating component is used to heat the water in the water outlet pipeline.

[0013] In a possible implementation, the control valve is a solenoid valve.

[0014] According to the water storage type electric water heater provided in the embodiment of the present application, the water storage type electric water heater detects the water level in the water tank by means of a liquid level sensor. When the water level in the water tank drops to a first preset water level, the control valve is controlled to open, and the water replenishment pipeline is connected, thereby replenishing the water in the water tank. When the water tank is short of water, water replenishment can be performed automatically, thereby ensuring the heat exchange effect between the water in the water tank and the heat exchange pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0018] Figure 1 A schematic cross-sectional structure diagram of a water storage type electric water heater provided in an embodiment of the present application is shown;

[0019] Figure 2 A schematic diagram of a side cross-sectional structure of a water storage type electric water heater provided in an embodiment of the present application is shown;

[0020] Figure 3 A schematic diagram showing the structure of a water storage type electric water heater provided in an embodiment of the present application is shown;

[0021] Figure 4 A schematic diagram showing the water flow direction of a storage type electric water heater provided in an embodiment of the present application when replenishing water;

[0022] Figure 5 A schematic diagram showing the water flow direction of a storage type electric water heater provided by an embodiment of the present application when in use;

[0023] Figure 6 A schematic structural diagram of a valve body provided in an embodiment of the present application is shown;

[0024] Figure 7 A schematic diagram showing the structure of a valve body and a baffle provided in an embodiment of the present application when the baffle is in a first position state;

[0025] Figure 8 A schematic diagram showing the structure of a valve body and a baffle provided in an embodiment of the present application when the baffle is in a third position state;

[0026] Fig. 9 A partial enlarged structural schematic diagram of a liquid level sensor and a water tank provided in an embodiment of the present application is shown.

[0027] Description of reference numerals:

[0028] 1. Water tank;

[0029] 2. Water supply pipeline; 21. Water inlet; 22. Water supply port;

[0030] 3. Control valve; 31. Valve body; 311. First inlet; 312. First outlet; 313. Second outlet; 314. Second inlet; 32. Baffle; 321. Water inlet hole; 322. Water outlet hole; 323. Communication hole; 33. Driving member;

[0031] 4. Liquid level sensor; 41. First detection unit; 42. Second detection unit;

[0032] 5. Overflow pipeline;

[0033] 6. Water outlet pipe; 61. Water outlet;

[0034] 7. A first heating component;

[0035] 8. Heat exchange pipeline;

[0036] 9. The second heating component. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0038] The disclosure below provides many different embodiments or examples to realize the different structures of the embodiments of the present application. In order to simplify the disclosure of the embodiments of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present application. In addition, the embodiments of the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0039] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0040] In order to solve the problems in the prior art, the present application provides a water storage type electric water heater, which can automatically replenish water when the water tank is short of water, thereby ensuring the heat exchange effect between the water in the water tank and the heat exchange pipeline.

[0041] like Figure 1-9 As shown, an embodiment of the present application provides a water storage type electric water heater, comprising: a water tank 1, a water supply pipeline 2, a control valve 3 and a liquid level sensor 4.

[0042] The water supply pipeline 2 is arranged on the water tank 1, and has a water inlet 21 and a water supply port 22 connected with the water inlet 21, the water inlet 21 is used to connect with an external water source, and the water supply port 22 is connected with the water tank 1. Specifically, the water inlet 21 is used to connect with an external water source, such as a tap water pipe.

[0043] A control valve 3 is arranged in the water supply pipeline 2 to control the on-off of the water supply pipeline 2; and a liquid level sensor 4 is arranged in the water tank 1 to detect the water level in the water tank 1, and the liquid level sensor 4 is electrically connected to the control valve 3; wherein, when the water level in the water tank 1 reaches a first preset water level, the control valve 3 is opened to connect the water supply pipeline 2.

[0044] In the present application, the water level in the water tank 1 is detected by the liquid level sensor 4. When the water level in the water tank 1 drops to the first preset water level, the control valve 3 is controlled to open, and the water replenishment pipeline 2 is connected, thereby replenishing the water in the water tank 1. When the water tank 1 is short of water, water can be automatically replenished, thereby ensuring the heat exchange effect between the water in the water tank 1 and the heat exchange pipeline 8.

[0045] In the related art, the water in the water tank 1 of the water storage electric water heater is lost due to the high temperature, and it is necessary to replenish water when the water level in the water tank 1 is low. At present, the replenishment of water in the water tank 1 is generally done manually, which is prone to untimely replenishment, thereby affecting the heat exchange effect between the water in the water tank 1 and the heat exchange pipeline 8. Moreover, once the water in the water tank 1 is lower than the preset value, it is equivalent to reducing the thermal energy storage capacity of the water tank 1. When using water, cold water continuously passes through the heat exchange pipeline 8 to become hot water, and the water temperature in the water tank 1 continues to decrease, affecting the sustainable use time of the water heater. The current water heater relies on manual replenishment of the water tank 1, and the water in the water tank 1 often cannot be at a normal level, affecting the energy output of the water tank 1 and the sustainable use time of the water heater.

[0046] In the present application, the water level in the water tank 1 can be monitored in real time through the liquid level sensor 4. Once the water level in the water tank 1 reaches the first preset value (i.e. the water level at which the water tank 1 needs to be replenished), the control controller is turned on, the water replenishment pipeline 2 is connected, and the external tap water enters the water replenishment pipeline 2 through the water inlet 21 and enters the water tank 1 through the water replenishment port 22, thereby realizing automatic water replenishment of the water tank 1, thereby avoiding the situation where the water tank 1 is not replenished in time, resulting in a low heat storage capacity in the water tank 1 and affecting the sustainable use time of the electric water heater.

[0047] Specifically, the water storage type electric water heater also includes an insulation layer arranged outside the water tank 1 and an outer shell arranged outside the insulation layer. The outer shell is used as a carrier to surround some pipes of the electric water heater. The insulation layer is used to insulate the water in the water tank 1 and reduce the heat loss in the water tank 1.

[0048] In some embodiments, the liquid level sensor 4 has a first detection part 41 and a second detection part 42, the height of the first detection part 41 is lower than the height of the second detection part 42, the first detection part 41 corresponds to a first preset water level, and the second detection part 42 corresponds to a second preset water level; wherein, when the water level reaches the second preset water level, the liquid level sensor 4 controls the control valve 3 to close.

[0049] In the present application, the first detection part 41 and the second detection part 42 of the liquid level sensor 4 are used to detect different liquid levels respectively. When the water level reaches the first preset water level, the first detection part 41 is triggered, thereby controlling the control valve 3 to open for water replenishment; the water level continues to rise, and when the water level rises to the second preset water level, the second detection part 42 is triggered, thereby controlling the control valve 3 to close and stop water replenishment. The water replenishment and suspension of the water replenishment operation of the water tank 1 can be automatically completed to avoid the situation where the water in the water tank 1 overflows due to excessive water replenishment.

[0050] like Figure 1 and 9As shown, specifically, because the loss of water in the water tank 1 is not much, it often takes several months or even a year to replenish water, but during this period, the water in the water tank 1 is getting less and less, so that the heat storage in the water tank 1 is also getting less and less. In this application, the distance L between the first preset water level and the second preset water level of the water tank 1 can be set relatively close. Because of the automatic water replenishment, the first preset water level can be raised as much as possible, thereby ensuring that the water level in the water tank 1 is always maintained at a relatively high state, thereby ensuring the heat storage of the water tank 1.

[0051] In another embodiment, the storage type electric water heater further includes an overflow pipe 5 connected to the top of the water tank 1 .

[0052] In the present application, an overflow pipe 5 can also be set. When too much water is added to the water tank 1, the excess water in the water tank 1 can flow out through the overflow pipe 5, which can further ensure safety. The overflow pipe 5 drains the excess water to the drain.

[0053] In some embodiments, the control valve 3 is a mixing valve, which includes a valve body 31, a baffle 32 arranged on the valve body 31, and a driving member 33 for driving the baffle 32 to move. The valve body 31 has a first inlet 311, a first outlet 312 and a second outlet 313. The first inlet 311 is connected to the water inlet 21, and the first outlet 312 is connected to the water replenishment port 22; the water storage electric water heater also includes a water outlet pipe 6 connected to the second outlet 313, and the water outlet pipe 6 has a water outlet 61; wherein the baffle 32 includes a first position state and a second position state. When the baffle 32 is in the first position state, the first inlet 311 is connected to the first outlet 312 and is separated from the second outlet 313. When the baffle 32 is in the second position state, the first inlet 311 is connected to the second outlet 313 and is separated from the first outlet 312.

[0054] like Figure 7 As shown, in the present application, the baffle 32 is driven by the driving member 33 to switch between the first position state and the second position state. Specifically, the driving member 33 can be a motor, and the baffle 32 can switch between the first position state and the second position state by sliding or rotating. When the baffle 32 is in the first position state, the first inlet 311 is connected with the first outlet 312, so that the water in the water replenishment pipeline 2 can enter the water replenishment port 22 for water replenishment operation; when the water replenishment operation is completed, the baffle 32 is switched to the second position state, the first inlet 311 is connected with the second outlet 313, and the water pipeline is connected, and water can be used normally.

[0055] Specifically, the water entering the first inlet 311 at this time is hot water after heat exchange in the water tank 1 or medium-temperature water after mixing.

[0056] In some embodiments, the water storage electric water heater also includes a first heating component 7 and a heat exchange pipeline 8 arranged in the water tank 1, and the first heating component 7 is used to heat the water in the water tank 1; the valve body 31 also has a second inlet 314, one end of the heat exchange pipeline 8 is connected to the first inlet 311, and the other end is connected to the second inlet 314; wherein, the baffle 32 also includes a third position state, when the baffle 32 is in the third position state, the first inlet 311 and the second inlet 314 are respectively connected to the second outlet 313, and the first inlet 311 and the second inlet 314 are respectively separated from the first outlet 312.

[0057] In the present application, the first heating component 7 is used to heat the water in the water tank 1 to complete the energy storage of the water tank 1. The heat exchange pipe 8 is located in the water tank 1 and exchanges heat with the water in the water tank 1. The water inlet and outlet of the heat exchange pipe 8 extend out of the water tank 1 and are connected to the first inlet 311 and the second inlet 314 respectively. When the baffle 32 is in the third position, the water entering the water inlet 21 is divided into two branches, one of which directly enters the second outlet 313 through the first water inlet 21, and the other branch of water flows through the heat exchange pipe 8 and enters the second outlet 313 through the second water inlet 21 after being heated. The low-temperature water and the high-temperature water are mixed in the water outlet pipe 6 to become medium-temperature water for export. When in use, by mixing the low-temperature water and the high-temperature water into medium-temperature water for reuse, it is equivalent to further increasing the continuous water output, which can further increase the temperature of the water in the water tank 1, increase the heat storage, and further extend the sustainable use time of the electric water heater.

[0058] In a specific embodiment, the water temperature in the water tank 1 is set to 80°C, and the water flowing through the heat exchange pipeline 8 can be heated to the same temperature as the water in the water tank 1, that is, 80°C. The temperature of tap water is 10°C-20°C, and the high-temperature water of 80°C is mixed with the tap water to form medium-temperature water of 30°C-50°C for use.

[0059] In some embodiments, the baffle 32 can be rotatably disposed on the valve body 31, and the baffle 32 is provided with a water inlet hole 321, a water outlet hole 322 and a connecting hole 323 connecting the water inlet hole 321 and the water outlet hole 322. The water inlet hole 321 is used to connect the first inlet 311 and / or the second inlet 314, and the water outlet hole 322 is used to connect the first outlet 312 or the second outlet 313.

[0060] In the present application, the position adjustment of the baffle 32 is completed by driving the baffle 32 to rotate by the driving member 33. Specifically, a toothed structure can be set on the outer ring of the baffle 32, and a gear can be set on the output end of the driving member 33. The gear is meshed with the toothed structure to realize the rotation of the baffle 32. When the water inlet hole 321 is connected with the first inlet 311, only cold water can enter the control valve 3, and then be discharged through the first outlet 312 to complete the water replenishment; when the water inlet hole 321 is connected with the second inlet 314, only hot water after heat exchange can enter the control valve 3, and then be discharged through the second outlet 313; when the water inlet hole 321 is connected with the first inlet 311 and the second inlet 314 respectively, both hot water and cold water after heat exchange can enter the control valve 3 and be discharged through the second outlet 313.

[0061] like Figure 8 As shown, in some embodiments, when the blocking piece 32 is in the third position, the communication opening between the water inlet hole 321 and the first inlet 311 and the second inlet 314 is adjustable.

[0062] In the present application, the communication opening between the water inlet hole 321 and the first inlet 311 and the second inlet 314 is adjustable, that is, when the baffle 32 is in the third position, when the communication opening between the water inlet hole 321 and the first inlet 311 is larger, the communication opening between the water inlet hole 321 and the second inlet 314 is smaller, then relatively more cold water enters the control valve 3, and relatively less high-temperature water enters the control valve 3, thereby reducing the water temperature in the water outlet pipe 6; when the communication opening between the water inlet hole 321 and the second inlet 314 is larger, the communication opening between the water inlet hole 321 and the first inlet 311 is smaller, then relatively more high-temperature water enters the control valve 3, and relatively less cold water enters the control valve 3, thereby increasing the water temperature in the water outlet pipe 6 and achieving regulation of the outlet water temperature.

[0063] like Figure 7-8 As shown, in some embodiments, the water inlet hole 321 and the water outlet hole 322 are arc structures with the rotation center of the baffle 32 as the center of the circle.

[0064] In the present application, by respectively setting the water inlet hole 321 and the water outlet hole 322 into arc structures, it can be ensured that when the baffle 32 in the third position is fine-tuned, the water outlet hole 322 can always remain connected with the second outlet 313, and at the same time, the connection opening of the water inlet hole 321 with the first inlet 311 and the second inlet 314 is adjusted, thereby ensuring the adjustment of the outlet water temperature without affecting the water output.

[0065] In some embodiments, the storage type electric water heater further includes a second heating component 9 disposed on the water outlet pipe 6 , and the second heating component 9 is used to heat the water in the water outlet pipe 6 .

[0066] In the present application, high-temperature water enters the control valve 3 through the second inlet 314, and cold water enters the control valve 3 through the first inlet 311. The high-temperature water and the cold water are mixed into medium-temperature water in the water outlet pipe 6. The water in the water outlet pipe 6 can be heated by the second heating component 9, and then the water in the water outlet pipe 6 is heated to the required temperature, which can further extend the sustainable use time of the electric water heater. Moreover, by setting the second heating component 9 to heat the water in the water outlet pipe 6, there is no need to consider the temperature of the high-temperature water and the cold water mixed in the mixing water pipe. The outlet water temperature of the water outlet pipe 6 can be accurately controlled by the second heating component 9, thereby achieving accurate control of the outlet water temperature.

[0067] In another embodiment, the control valve 3 is a solenoid valve.

[0068] In the present application, the control valve 3 can also be a solenoid valve, and the water supply pipeline 2 is independently set, that is, part of the cold water entering the water inlet 21 enters the water supply pipeline 2 for water supply, and whether to supply water is controlled by the solenoid valve, and the other part enters the heat exchange pipeline 8 for daily water use.

[0069] The storage type electric water heater detects the water level in the water tank 1 through the liquid level sensor 4. When the water level in the water tank 1 drops to a first preset water level, the control valve 3 is controlled to open, and the water replenishment pipeline 2 is connected, thereby replenishing the water in the water tank 1. When the water tank 1 is short of water, water can be automatically replenished, thereby ensuring the heat exchange effect between the water in the water tank 1 and the heat exchange pipeline 8.

[0070] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0071] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0072] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A storage type electric water heater, characterized in that: include: Water tank (1); A water replenishment pipeline (2) is arranged on the water tank (1), the water replenishment pipeline (2) has a water inlet (21) and a water replenishment port (22) connected to the water inlet (21), the water inlet (21) is used to connect to an external water source, and the water replenishment port (22) is connected to the water tank (1); a control valve (3), arranged in the water supply pipeline (2), and used for controlling the on-off of the water supply pipeline (2); and A liquid level sensor (4) is arranged in the water tank (1) and is used to detect the water level in the water tank (1); the liquid level sensor (4) is electrically connected to the control valve (3); When the water level in the water tank (1) reaches a first preset water level, the control valve (3) is opened to connect the water supply pipeline (2).

2. The storage type electric water heater according to claim 1, characterized in that: The liquid level sensor (4) comprises a first detection portion (41) and a second detection portion (42), the height of the first detection portion (41) being lower than the height of the second detection portion (42), the first detection portion (41) corresponding to the first preset water level, and the second detection portion (42) corresponding to the second preset water level; When the water level reaches the second preset water level, the liquid level sensor (4) controls the control valve (3) to close.

3. The storage type electric water heater according to claim 1, characterized in that: The storage-type electric water heater also includes an overflow pipeline (5) connected to the top of the water tank (1).

4. The storage type electric water heater according to claim 2, characterized in that: The control valve (3) is a water mixing valve, comprising a valve body (31), a baffle (32) arranged on the valve body (31), and a driving member (33) for driving the baffle (32) to move, the valve body (31) having a first inlet (311), a first outlet (312), and a second outlet (313), the first inlet (311) being connected to the water inlet (21), and the first outlet (312) being connected to the water replenishment port (22); The water storage type electric water heater further comprises a water outlet pipeline (6) in communication with the second outlet (313), wherein the water outlet pipeline (6) has a water outlet (61); The baffle (32) includes a first position state and a second position state. When the baffle (32) is in the first position state, the first inlet (311) is connected to the first outlet (312) and is separated from the second outlet (313). When the baffle (32) is in the second position state, the first inlet (311) is connected to the second outlet (313) and is separated from the first outlet (312).

5. The storage type electric water heater according to claim 4, characterized in that: The water storage type electric water heater further comprises a first heating component (7) and a heat exchange pipeline (8) arranged in the water tank (1), wherein the first heating component (7) is used to heat the water in the water tank (1); the valve body (31) further comprises a second inlet (314), one end of the heat exchange pipeline (8) is in communication with the first inlet (311), and the other end is in communication with the second inlet (314); The blocking piece (32) further includes a third position state. When the blocking piece (32) is in the third position state, the first inlet (311) and the second inlet (314) are respectively connected to the second outlet (313), and the first inlet (311) and the second inlet (314) are respectively blocked from the first outlet (312).

6. The storage type electric water heater according to claim 5, characterized in that: The baffle (32) is rotatably disposed on the valve body (31), and is provided with a water inlet hole (321), a water outlet hole (322), and a connecting hole (323) connecting the water inlet hole (321) and the water outlet hole (322); the water inlet hole (321) is used to connect the first inlet (311) and / or the second inlet (314), and the water outlet hole (322) is used to connect the first outlet (312) or the second outlet (313).

7. The storage type electric water heater according to claim 6, characterized in that: When the blocking piece (32) is in the third position, the degree of communication between the water inlet hole (321) and the first inlet (311) and the second inlet (314) is adjustable.

8. The storage type electric water heater according to claim 6, characterized in that: The water inlet (321) and the water outlet (322) are respectively arc structures with the rotation center of the baffle (32) as the center of the circle.

9. The storage type electric water heater according to claim 5, characterized in that: The water storage type electric water heater further comprises a second heating component (9) arranged on the water outlet pipeline (6), wherein the second heating component (9) is used for heating the water in the water outlet pipeline (6).

10. The storage type electric water heater according to claim 2, characterized in that: The control valve (3) is a solenoid valve.

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