Energy storage box and electric water heater

Abstract

The utility model relates to the field of electric water heaters, and provides an energy storage box and an electric water heater, the energy storage box comprises a water tank and an exhaust channel, the water tank is provided with a closed inner cavity, the inner cavity is used for storing energy storage liquid, the water tank comprises a front face and a back face which are opposite, and the two opposite ends of the exhaust channel are respectively provided with an air inlet and an air outlet. The air inlet is located in the water tank and communicated with the inner cavity, the height of the air inlet is larger than that of the liquid level of the energy storage liquid, and the exhaust port extends towards the back face and is communicated with the atmosphere. According to the energy storage box, air in the inner cavity can be exhausted through the exhaust channel, normal air pressure in the inner cavity is guaranteed, meanwhile, the air in the inner cavity is exhausted towards the back face through the exhaust channel, and harm of steam to a user can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of electric water heaters, in particular to an energy storage box and an electric water heater. Background Art

[0002] Electric water heaters are household appliances that are closely related to people's lives. When the water temperature in an electric water heater exceeds the ambient temperature, steam is generated inside the heater. If this steam remains inside the heater, it can increase the pressure inside the heater, posing a safety hazard. Therefore, it is necessary to discharge the steam inside the heater. If this steam comes into contact with the user, it could pose a risk of burns. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the related art. To this end, the present invention provides an energy storage box and an electric water heater, which can discharge gas in the inner cavity and prevent users from being scalded.

[0004] According to an embodiment of the first aspect of the present utility model, an energy storage box includes: a water tank and an exhaust channel, the water tank is provided with a closed inner cavity, the inner cavity is used to store energy storage liquid, the water tank includes a relative front and a back surface, and the exhaust channel is provided with an air inlet and an exhaust port at opposite ends, respectively, the air inlet is located in the water tank and is connected to the inner cavity, the height of the air inlet is higher than the liquid level of the energy storage liquid, and the exhaust port extends toward the back surface and is connected to the atmosphere.

[0005] According to an energy storage box of an embodiment of the present invention, an exhaust channel is inserted into the inner cavity, and the inner cavity is connected to the atmosphere through the exhaust channel, so that the gas in the inner cavity can be discharged into the atmosphere along the exhaust channel. At the same time, the exhaust channel is bent toward the back so that the exhaust port faces the back, thereby avoiding safety accidents caused by gas discharge from the front.

[0006] According to one embodiment of the present utility model, a first mounting hole communicating with the inner cavity is opened at the bottom of the water tank, the exhaust channel includes an exhaust pipe arranged in the inner cavity, the bottom of the exhaust pipe is passed through the first mounting hole, the air inlet is connected to the top of the exhaust pipe, and the exhaust port is communicated with the bottom of the exhaust pipe.

[0007] According to one embodiment of the present invention, the energy storage box further includes a cover, which covers the first mounting hole and the exhaust pipe from the bottom surface.

[0008] According to one embodiment of the present invention, the main body portion covering the bottom surface of the water tank and the extension portion covering the back surface of the water tank are provided with an exhaust hole, and the exhaust port is connected to the atmosphere through the exhaust hole.

[0009] According to one embodiment of the present invention, the sealing cover is provided with a drain port, the exhaust port is communicated with the drain port, and the drain port is used to discharge the energy storage liquid overflowing from the inner cavity.

[0010] According to one embodiment of the present invention, the energy storage box further includes a plug, which is connected between the exhaust channel and the water tank and is used to seal the water tank.

[0011] According to one embodiment of the present invention, a second mounting hole communicating with the inner cavity is opened on the back of the water tank, the exhaust channel is passed through the second mounting hole and is at least partially located in the inner cavity, the tube body of the exhaust channel inserted into the inner cavity extends toward the top of the water tank, or the height of the opening position of the second mounting hole is higher than the liquid level of the energy storage liquid.

[0012] According to one embodiment of the present invention, a third mounting hole communicating with the inner cavity is provided on the top of the water tank, the exhaust channel is passed through the third mounting hole and is at least partially located in the inner cavity, and the tube body of the exhaust channel located outside the inner cavity extends toward the back side.

[0013] According to one embodiment of the present invention, the end portion of the exhaust passage extending toward the top of the water tank is an air inlet, and the air inlet is spaced apart from the top of the water tank.

[0014] According to an embodiment of the second aspect of the present invention, an electric water heater includes a shell, a mounting bracket and the energy storage box as described above, wherein the energy storage box is arranged in the shell, the mounting bracket is connected to the shell for mounting the energy storage box, and the mounting bracket is connected to the side where the back side is located.

[0015] One or more of the above technical solutions in the embodiments of the present invention have at least one of the following technical effects: The exhaust passage connects the inner cavity to the atmosphere, allowing the gas in the inner cavity to be discharged when the air pressure in the inner cavity increases, thereby aligning the air pressure in the inner cavity with the atmospheric pressure and ensuring the stability of the air pressure in the inner cavity. Furthermore, since the gas in the inner cavity is discharged in a direction away from the front, burns to the user by the discharged gas are avoided, thereby improving user safety.

[0016] Furthermore, a drain port is provided on the sealing plate, so that when the energy storage liquid in the inner cavity overflows, the overflowed energy storage liquid flows along the exhaust channel to the drain port and flows out through the drain port, thereby ensuring that no liquid accumulates inside the energy storage box.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is one of the cross-sectional views of an energy storage box provided by the utility model;

[0020] Figure 2 yes Figure 1 An exploded view of the electric water heater shown;

[0021] Figure 3 This is the second cross-sectional view of an energy storage box provided by the present utility model;

[0022] Figure 4 This is the third cross-sectional view of an energy storage box provided by the present utility model;

[0023] Reference numerals:

[0024] 1: Water tank, 11: Inner cavity, 12: Front, 13: Back, 14: First mounting hole, 15: Second mounting hole, 16: Third mounting hole; 2: Exhaust channel, 21: Air inlet, 22: Exhaust port, 23: Exhaust pipe; 3: Mounting bracket; 4: Plug; 5: Closing plate, 51: Main body, 52: Extension, 53: Air inlet, 54: Drain port; 8: Liquid level sensor; 9: Housing. DETAILED DESCRIPTION

[0025] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0027] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0028] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0030] The following combination Figure 1-Figure 4 An energy storage box according to an embodiment of the present invention is described.

[0031] like Figure 1 and Figure 2 As shown, the energy storage tank of the first embodiment of the present invention includes a water tank 1 for storing energy storage fluid. To prevent leakage of the energy storage fluid within the energy storage tank, the water tank 1 has a sealed inner chamber 11. Because the energy storage fluid is contained within the inner chamber 11, steam is generated during operation, increasing the pressure within the inner chamber 11.

[0032] like Figure 1As shown, this embodiment is provided with an exhaust channel 2. The outlet of the exhaust channel 2 located in the inner cavity 11 is an air inlet 21, and the outlet of the exhaust channel 2 opposite to the air inlet 21 is an exhaust port 22. The height of the air inlet 21 is higher than the liquid level of the energy storage liquid in the inner cavity 11 to prevent the energy storage liquid from leaking from the exhaust channel 2.

[0033] When exhaust channel 2 is partially located within inner cavity 11, it communicates with the air in inner cavity 11 through air inlet 21, while exhaust port 22 communicates with the atmosphere. Therefore, exhaust channel 2 can maintain the air pressure in inner cavity 11 consistent with atmospheric pressure. Therefore, when the energy storage box is operating or under pressure, the high-pressure gas in inner cavity 11 can be discharged into the atmosphere through exhaust channel 2, thereby reducing the air pressure in inner cavity 11. This keeps the air pressure in inner cavity 11 consistent with atmospheric pressure and ensures its stability.

[0034] When the energy storage box is working, high-temperature steam may be generated in the inner cavity 11. If the position of the high-temperature steam discharged through the exhaust channel 2 is not accurate, it may cause a risk of burns to the user. In this embodiment, the high-temperature steam in the inner cavity 11 is discharged through the exhaust channel 2, so the exhaust port 22 and the back side 13 are located on the same side. Then, after the high-temperature and high-pressure gas in the inner cavity 11 enters the exhaust channel 2 along the air inlet 21, when it is discharged from the exhaust port 22, under the guidance of the exhaust port 22, the high-temperature and high-pressure gas is discharged toward the back side 13, that is, backward. Because the front side 12 is usually opposite to the user and the back side 13 is opposite to the equipment where the water tank 1 is installed, discharging the high-temperature and high-pressure gas backward through the exhaust channel 2 can effectively avoid the safety hazards caused by discharging directly towards the user.

[0035] Figure 1 In the embodiment, a first mounting hole 14 is formed at the bottom of the water tank 1, and the exhaust passage 2 is installed in the inner cavity 11 through the first mounting hole 14. The first mounting hole 14 is then sealed to prevent the energy storage fluid in the inner cavity 11 from flowing out of the first mounting hole 14. Of course, the specific installation method of the exhaust passage 2 is not limited to the example shown here.

[0036] Please refer to Figure 1 and Figure 2 In this embodiment, the energy storage tank also includes a sealing plate 5. Because the exhaust duct 2 extends from the bottom of the water tank 1 to the back 13, this section of the pipe is exposed and easily damaged, affecting the integrity and aesthetics of the water tank 1. Therefore, in this embodiment, a sealing plate 5 covers the exposed portion of the exhaust duct 2 from the bottom, protecting the exhaust duct 2 while also enhancing the aesthetics and consistency of the entire water tank 1. The sealing plate 5 also covers the water tank 1, providing a seal with the water tank 1.

[0037] In this embodiment, the exhaust channel 2 includes an exhaust pipe 23 disposed within the inner cavity 11 and a channel disposed outside the inner cavity 11. The top of the exhaust pipe 23 serves as the air inlet 21, so the top of the exhaust pipe 23 is above the liquid level. The portion of the exhaust channel 2 disposed outside the inner cavity 11 is formed by the cover 5 and the outer surface of the water tank 1. Because the cover 5 covers the first mounting hole 14, gas exhausted from the exhaust pipe 23 flows toward the cover 5 and is discharged through the portion of the exhaust channel 2 disposed outside the inner cavity 11.

[0038] In different embodiments, the exhaust channel 2 may also be completely composed of the exhaust pipe 23 , and then the portion of the exhaust pipe 23 outside the inner cavity 11 can be bent toward the side where the back surface 13 is located.

[0039] Furthermore, the sealing plate 5 includes a main body 51 and an extension 52, wherein the main body 51 covers the water tank 1 from the bottom, and the extension 52 covers the water tank 1 from the back. Because the exposed parts of the exhaust channel 2 are covered by the sealing plate 5, the gas discharged from the exhaust port 21 will be enclosed in the space enclosed by the water tank 1 and the sealing plate 5. Therefore, it is necessary to open an exhaust hole 53 on the sealing plate 5 so that the gas in the sealing plate 5 can be discharged. Because it is necessary to discharge the high-temperature and high-pressure gas backward, the exhaust hole 53 is opened on the extension 52 in this embodiment. Therefore, the channel outside the inner cavity 11 does not need to be provided with a pipeline, and can be discharged through the exhaust hole 53. Then in this embodiment, the exhaust port 22 can be set at the bottom of the exhaust pipe 23, and there is no need to continue to extend.

[0040] like Figure 1 As shown, the gas in the inner cavity 11 enters the exhaust channel 2 from the air inlet 21 and flows into the interior of the sealing plate 5 from the exhaust port 22, and can only be discharged backward through the exhaust hole 53. Therefore, the exhaust channel 2 no longer needs to extend outward from the first mounting hole 14, and no longer needs to be guided by the exhaust channel 2. After the high-temperature and high-pressure gas is discharged into the sealing plate 5 through the exhaust port 22, it can be discharged backward under the guidance of the exhaust hole 53, thereby shortening the length of the exhaust channel 2 and saving resources.

[0041] After the gas in the inner cavity 11 is discharged along the air inlet 21, it is discharged through the exhaust port 22. The gas discharged from the exhaust port 22 is discharged backward under the guidance of the exhaust channel 2 or the sealing plate 5, thereby improving the safety of the energy storage box.

[0042] like Figure 2As shown, in this embodiment, the cover 5 is also provided with a drain port 54, which is connected to the exhaust port 22. Preferably, the drain port 54 is located at the lowest point on the cover 5 to ensure that the energy storage fluid can flow toward the drain port 54 under the action of gravity and out through the drain port 54. Because the drain port 54 is connected to the atmosphere, the gas flowing out of the exhaust port 22 may also flow through the drain port 54 into the atmosphere, which will change the direction of gas discharge in the inner cavity 11. Therefore, the drain port 54 needs to be sealed, and the sealing member used to seal the drain port 54 is removably connected to the drain port 54. The seal member seals the drain port 54 to prevent the energy storage fluid from overflowing. If the energy storage box is shaken, vibrated, or other factors cause the energy storage fluid in the inner cavity 11 to move violently and overflow through the air inlet 21, the seal member can be removed from the drain port 54 after the high-temperature, high-pressure gas in the inner cavity 11 has been completely discharged, allowing the overflowed energy storage fluid to drain.

[0043] In this embodiment, by providing a drain port 54 on the cover 5, when the energy storage liquid in the inner cavity 11 overflows, the overflowed energy storage liquid can flow along the exhaust pipe 23 to the drain port 54 and flow out through the drain port 54, thereby ensuring that no liquid accumulates inside the energy storage box.

[0044] Please refer to Figure 3 , Figure 3 Another energy storage tank is shown. In this embodiment, a second mounting hole 15 is provided on the back 13 of the water tank 1. In this embodiment, the exhaust passage 2 is inserted into the inner cavity 11 through the second mounting hole 15. Because the inner cavity 11 is mostly filled with energy storage fluid and only a small amount of gas, and because the density of gas is lower than that of liquid, the lower portion of the inner cavity 11 (along the direction of gravity) is liquid, while the upper portion is gas.

[0045] Therefore, the second mounting hole 15 is opened at a position slightly above the back surface 13. After the exhaust channel 2 is inserted into the inner cavity 11 from the second mounting hole 15, the second mounting hole 15 also needs to be closed to prevent the energy storage liquid in the inner cavity 11 from leaking from the second mounting hole 15. Because in this embodiment, the height of the position where the second mounting hole 15 is opened is lower than the liquid level of the energy storage liquid in the inner cavity 11, the exhaust channel 2 needs to extend toward the top surface of the inner cavity 11 after being inserted into the inner cavity 11 from the second mounting hole 15, and the air inlet 21 of the exhaust channel 2 needs to extend to above the liquid level sensor 8, so as to prevent the energy storage liquid in the inner cavity 11 from leaking outward from the air inlet 21. Preferably, in this embodiment Figure 3 The exhaust passage 2 is shown in a 90° bend.

[0046] Furthermore, after the air inlet 21 extends above the liquid level sensor 8, it needs to be spaced apart from the water tank 1 at the top of the inner chamber 11 to ensure sufficient clearance between the exhaust passage 11 and the top of the water tank 1. When the energy storage tank is pressurized or the pressure in the inner chamber 11 decreases and compresses, the reserved gap prevents compression and collision between the water tank 1 and the exhaust passage 2, thus protecting the exhaust passage 2 and the water tank 1.

[0047] In this embodiment, because the second mounting hole 15 is opened on the back side 13, the pipe section of the exhaust channel 2 outside the inner cavity 11 no longer needs to be bent, so that the exhaust port 22 can be located on one side of the back side 13 and exhaust can be carried out backward.

[0048] Furthermore, the exhaust channel 2 can also be a straight tube without any bends. When the height of the second mounting hole 15 is lower than the liquid level of the energy storage fluid in the inner cavity 11, the exhaust channel 2 needs to be arranged at an angle. Because the second mounting hole 15 is below the liquid level of the energy storage fluid, and the height of the air inlet 21 needs to be higher than the liquid level of the energy storage fluid, the exhaust port 22 will be located below the second mounting hole 15, making the entire exhaust channel 2 in an inclined state.

[0049] If the height of second mounting hole 15 is set to be greater than the liquid level of the energy storage fluid in inner cavity 11, that is, second mounting hole 15 is located above back surface 13 and near the top of inner cavity 11, then, after exhaust duct 2 is inserted into inner cavity 11 through second mounting hole 15, it will first come into contact with the air in inner cavity 11, eliminating the need to tilt exhaust duct 2. Exhaust duct 2 can be inserted horizontally into second mounting hole 15. As long as the energy storage fluid in inner cavity 11 does not move violently, the energy storage fluid in inner cavity 11 will not leak from exhaust duct 2.

[0050] Preferably, the exhaust channel 2 can also be arranged at an angle, with the exhaust port 22 being higher than the air inlet 21. This arrangement can facilitate exhaust and make gas discharge smoother. Because the height of the air inlet 21 is higher than the liquid level of the energy storage liquid when placed horizontally, the air inlet 21 will gradually approach the liquid level when the exhaust channel 2 is arranged at an angle. Therefore, when arranging the exhaust channel 2 at an angle, it is necessary to ensure that the height of the air inlet 21 is higher than the liquid level of the energy storage liquid.

[0051] like Figure 4 As shown, Figure 4The third embodiment of the energy storage tank of the present invention is shown. In this embodiment, a third mounting hole 16 is provided on the top surface of the water tank 1. In this embodiment, the exhaust channel 2 is inserted into the inner cavity 11 through the third mounting hole 16. Because the exhaust channel 2 is inserted from the top of the inner cavity 11, the air inlet 21 of the exhaust channel 2 does not need to extend into the inner cavity 11, ensuring that the air inlet 21 is above the liquid level of the energy storage fluid. The section of the exhaust channel 2 outside the inner cavity 11 needs to be bent, with the bend direction facing the back surface 13, to ensure that the exhaust port 22 is on the same side as the back surface 13.

[0052] The present invention also provides an electric water heater comprising a housing 9 and the energy storage tank described above. The energy storage tank is disposed within the housing 9 and protected by the housing 9. Furthermore, an insulation layer is provided between the energy storage tank and the housing 9, enveloping the entire energy storage tank and thereby maintaining the heat of the hot water therein.

[0053] As will be appreciated, in this case, the energy storage tank is housed within the housing 9. Therefore, the front face 12 and back face 13 described above correspond to the front and back faces of the housing 9. The housing 9 also has an exhaust hole, and the exhaust passage must pass through the housing 9 and extend to the back face. The electric water heater also includes a mounting bracket 3 for mounting the energy storage tank. The mounting bracket 3 can be connected to one side of the back face 13 of the water tank 1.

[0054] The energy storage box of the embodiment of the present utility model further includes: a liquid level sensor 8, which is installed on the inner wall of the inner cavity 11. The liquid level sensor 8 is installed at the highest level of the energy storage liquid in the inner cavity 11, and the highest level of the energy storage liquid needs to be determined according to actual conditions. The liquid level sensor 8 is used to monitor the liquid level of the energy storage liquid in the inner cavity 11. When the liquid level of the energy storage liquid in the inner cavity 11 exceeds the liquid level sensor 8, the liquid level sensor 8 issues an alarm to prompt. After hearing the alarm, the operator or user can stop the operation of the energy storage box in time and discharge the energy storage liquid in the inner cavity 11 to make the liquid level of the energy storage liquid in the inner cavity 11 drop below the liquid level sensor 8.

[0055] In this embodiment, the liquid level of the energy storage liquid in the inner cavity 11 is monitored by the liquid level sensor 8, so that the liquid level of the energy storage liquid can be controlled below a specified height, thereby effectively preventing the energy storage liquid in the inner cavity 11 from overflowing.

[0056] According to an embodiment of the present invention, the liquid level sensor 8 may be connected to a controller, and the controller may be electrically connected to a switch, which is used to control the switch to open or close the energy storage tank. The liquid level sensor 8 transmits the monitored liquid level information to the controller via an electrical signal, and the controller analyzes the liquid level information monitored by the liquid level sensor 8.

[0057] A height value is preset inside the controller, and the preset height value is usually the height of the liquid level sensor 8 in the inner cavity 11; after the controller receives the liquid level height information transmitted by the liquid level sensor 8, the received liquid level height information is compared with the preset height value. If the received liquid level height information is less than the preset height value, no additional operation is performed, and the liquid level sensor 8 continues to monitor; if the received liquid level height information is greater than or equal to the preset height value, the controller immediately controls the switch to perform a closing operation, which can effectively avoid safety accidents caused by overflow of the energy storage liquid in the inner cavity 11.

[0058] Finally, it should be noted that the above embodiments are intended only to illustrate the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art will appreciate that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and are intended to be encompassed by the claims of the present invention.

Claims

1. An energy storage box, characterized in that: include: A water tank (1) and an exhaust channel (2), wherein the water tank (1) is provided with a closed inner cavity (11), the inner cavity (11) is used to store energy storage liquid, the water tank (1) comprises a front surface (12) and a back surface (13) opposite to each other, an air inlet (21) and an exhaust port (22) are respectively provided at opposite ends of the exhaust channel (2), the air inlet (21) is located in the water tank (1) and communicates with the inner cavity (11), the height of the air inlet (21) is higher than the liquid level of the energy storage liquid, and the exhaust port (22) extends toward the back surface (13) and communicates with the atmosphere.

2. The energy storage box according to claim 1, characterized in that: The water tank (1) has a first mounting hole (14) at the bottom thereof, which is in communication with the inner cavity (11). The exhaust passage (2) includes an exhaust pipe (23) arranged in the inner cavity (11). The bottom of the exhaust pipe (23) is passed through the first mounting hole (14). The air inlet (21) is connected to the top of the exhaust pipe (23), and the exhaust port (22) is in communication with the bottom of the exhaust pipe (23).

3. The energy storage box according to claim 2, characterized in that: The energy storage box further comprises a sealing cover (5), wherein the sealing cover (5) covers the first mounting hole (14) and the exhaust pipe (23) from the bottom surface.

4. The energy storage box according to claim 3, characterized in that: The cover (5) comprises a main body (51) covering the bottom surface of the water tank (1) and an extension (52) covering the back surface (13) of the water tank (1). The extension (52) is provided with an exhaust hole (53), and the exhaust port (22) is connected to the atmosphere through the exhaust hole (53).

5. The energy storage box according to claim 3, characterized in that: The cover (5) is provided with a drain port (54), the exhaust port (22) is in communication with the drain port (54), and the drain port (54) is used to discharge the energy storage liquid in the inner cavity (11).

6. The energy storage box according to claim 1, characterized in that: The energy storage box further comprises a plug (4), wherein the plug (4) is connected between the exhaust passage (2) and the water tank (1) and is used for sealing the water tank (1).

7. The energy storage box according to claim 1, characterized in that: A second mounting hole (15) communicating with the inner cavity (11) is provided on the back side (13) of the water tank (1); the exhaust channel (2) is passed through the second mounting hole (15) and is at least partially located in the inner cavity (11); the tube of the exhaust channel (2) inserted into the inner cavity (11) extends toward the top of the water tank (1); or the height of the opening position of the second mounting hole (15) is higher than the liquid level of the energy storage liquid.

8. The energy storage box according to claim 1, characterized in that: A third mounting hole (16) communicating with the inner cavity (11) is provided on the top of the water tank (1); the exhaust passage (2) is passed through the third mounting hole (16) and is at least partially located in the inner cavity (11); and the tube body of the exhaust passage (2) located outside the inner cavity (11) extends toward the back surface (13).

9. The energy storage box according to claim 8, characterized in that: The end portion of the exhaust channel (2) extending toward the top of the water tank (1) is an air inlet (21), and the air inlet (21) is spaced apart from the top of the water tank (1).

10. An electric water heater, characterized in that: The invention comprises a housing (9), a mounting bracket (3), and an energy storage box according to any one of claims 1 to 9, wherein the energy storage box is arranged in the housing (9), the mounting bracket (3) is connected to the housing (9) for mounting the energy storage box, and the mounting bracket (3) is connected to the side where the back surface (13) is located.

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