Electric water heating device

Abstract

The utility model relates to the technical field of electric water heating devices, and particularly discloses an electric water heating device which comprises a water container, a thermostatic valve, a control panel, a water inlet pipe and a water outlet pipe. The water container is provided with an upper temperature sensor for detecting the upper water temperature of the water container; the thermostatic valve comprises a valve body and a valve core; the valve body comprises a cold water inlet part, a hot water inlet part and a mixed water outlet part; cold water flowing into the valve body through the cold water inlet part can flow into the water container and the mixed water outlet part; the hot water inlet part enables hot water in the water container to flow into the mixed water outlet part; the valve core controls the mixing proportion of cold water and hot water flowing into the mixed water outlet part; the control panel is electrically connected with the upper temperature sensor and a motor for driving the valve core to act; the upper temperature sensor is close to the water inlet of the water outlet pipe or transversely away from and close to or flush with the water inlet of the water outlet pipe in the height direction. The position relation between the upper temperature sensor and the water inlet is ingeniously set, and the upper temperature sensor can be reused for pre-adjustment of the thermostatic valve.

Description

Technical Field

[0001] This manual relates to the technical field of electric water heaters, and in particular to an electric water heater. Background Technology

[0002] Electric water heaters are typically equipped with thermostatic valves to maintain a constant water temperature. Currently, to ensure this effect, the valve core of the thermostatic valve needs pre-adjustment and feedback adjustment. Therefore, existing thermostatic valves generally have three temperature probes: a cold water temperature probe, a hot water temperature probe, and a mixing water temperature probe. However, this setup results in higher costs for the thermostatic valve and introduces more potential leak points.

[0003] There is currently no effective solution to the above problems. Utility Model Content

[0004] This specification provides an electric water heating device to solve the problems of high cost and multiple leakage points in the prior art when the thermostatic valve core is pre-adjusted in electric water heaters.

[0005] This specification provides an electric water heating device, which includes a water tank and a thermostatic valve.

[0006] The water tank has an upper temperature sensor located at the top of the water tank to detect the water temperature at the top of the water tank.

[0007] The thermostatic valve includes a valve body and a valve core. The valve body includes a cold water inlet, a hot water inlet, and a mixing outlet. The cold water inlet is connected to the water tank and the mixing outlet, respectively, allowing cold water flowing into the valve body via the cold water inlet to flow into the water tank and the mixing outlet. The hot water inlet connects the water tank and the mixing outlet, allowing hot water from the water tank to flow into the mixing outlet. The valve core controls the mixing ratio of cold and hot water flowing into the mixing outlet. The outlet of the mixing outlet is used to output the mixed water.

[0008] The electric water heater further includes an inlet pipe and an outlet pipe; at least a portion of the inlet pipe and at least a portion of the outlet pipe are disposed in the water tank; the inlet pipe is connected to the cold water inlet section, and the inlet pipe is used to input cold water flowing into the valve body via the cold water inlet section into the water tank; the outlet pipe is connected to the hot water inlet section, and the outlet pipe is used to input hot water in the water tank into the hot water inlet section;

[0009] The electric water heater also includes a control board, which is electrically connected to the upper temperature sensor and also electrically connected to a motor for driving the valve core to control the opening of the valve core at least according to the water temperature at the top of the water tank.

[0010] The upper temperature sensor is positioned close to the inlet of the water outlet pipe, or the upper temperature sensor is positioned laterally away from the inlet of the water outlet pipe and vertically close to the inlet of the water outlet pipe, or is flush with the inlet of the water outlet pipe in the vertical direction.

[0011] In one embodiment, at least part of the upper temperature sensor is located inside the water tank, or the upper temperature sensor is disposed on the outer wall of the water tank.

[0012] In one embodiment, the water tank also has a lower temperature sensor located at the bottom of the water tank to detect the water temperature at the bottom of the water tank;

[0013] The control board is also electrically connected to the lower temperature sensor, and is used to control the opening degree of the valve core according to the water temperature at the top of the water tank and the water temperature at the bottom of the water tank;

[0014] The lower temperature sensor is positioned above the outlet of the water inlet pipe and is closer to the outlet of the water inlet pipe than the upper temperature sensor, or...

[0015] The lower temperature sensor is positioned close to the outlet of the water inlet pipe in the vertical direction, or the lower temperature sensor is flush with the outlet of the water inlet pipe in the vertical direction.

[0016] In one embodiment, the electric water heater further includes a mixing temperature sensor for detecting the mixing outlet temperature of the mixing outlet. The thermostatic valve further includes a motor for driving the valve core to adjust the mixing ratio of cold water and hot water flowing into the mixing outlet.

[0017] In one embodiment, the valve body further includes a cold water chamber, a first cold water communication section, a second cold water communication section, and a cold water outlet section; the cold water inlet section is connected to the cold water chamber; the hot water inlet section and the cold water outlet section are used to connect to the water tank through the same port on the water tank;

[0018] The valve core is disposed within the cold water chamber; the valve core is used to divert water entering the cold water chamber to the first cold water connecting part and the second cold water connecting part; the first cold water connecting part is used to connect the cold water chamber and the cold water outlet, and the cold water outlet is used to allow cold water to flow into the water tank through the same opening on the water tank; the second cold water connecting part is used to connect the cold water chamber and the mixing water outlet, and the hot water inlet is used to allow hot water in the water tank to flow into the mixing water outlet through the same opening on the water tank.

[0019] The inlet of the mixing water outlet is connected to the second cold water communication section and the hot water inlet section;

[0020] At least part of the hot water inlet is located inside the cold water outlet.

[0021] In one embodiment, the cold water cavity is provided with a cold water inlet, a first cold water outlet, and a second cold water outlet; the cold water inlet is connected to the cold water inlet portion, the first cold water outlet is connected to the first cold water connecting portion, and the second cold water outlet is connected to the second cold water connecting portion.

[0022] The first cold water outlet, the second cold water outlet, and the cold water inlet are located on the same surface of the cold water cavity;

[0023] The same surface refers to the surface of the cold water cavity facing the cold water outlet and the mixed water outlet.

[0024] In one embodiment, the valve core includes a movable valve plate and a fixed valve plate. The fixed valve plate is provided with a first cold water outlet and a second cold water outlet. The first cold water outlet is used to connect with the first cold water outlet, and the second cold water outlet is used to connect with the second cold water outlet. The movable valve plate is used to control the connection relationship between the cold water inlet and the first and second cold water outlets.

[0025] In one embodiment, the first cold water outlet and the second cold water outlet at least partially overlap in the lateral direction, or the first cold water outlet and the second cold water outlet do not overlap in the lateral direction but the lateral distance between them is less than a first preset distance; and / or,

[0026] The first cold water connection and the second cold water connection extend in the same direction; and / or,

[0027] The first cold water connection part includes a first cold water connection pipe, and the second cold water connection part includes a second cold water connection pipe. The first cold water connection pipe and the second cold water connection pipe are arranged in parallel.

[0028] In one embodiment, the first cold water connection portion is higher than the second cold water connection portion; the first cold water connection portion extends from the cold water cavity towards the cold water outlet portion; the second cold water connection portion extends from the cold water cavity towards the mixed water outlet portion.

[0029] The cold water flow channels in the cold water outlet section and the cold water flow channels in the second cold water connecting section do not intersect.

[0030] In one embodiment, the cold water chamber and the cold water outlet and / or the hot water inlet are separated by a preset distance in the horizontal and / or vertical directions to be independently arranged;

[0031] The first cold water connection part has a first cold water connection pipe of a preset length, which is used to connect the cold water cavity and the cold water outlet; the second cold water connection part has a second cold water connection pipe of a preset length, which is used to connect the cold water cavity and the mixed water outlet.

[0032] The technical solution in this specification has the following significant advantages:

[0033] The electric water heating device in the embodiments of this specification includes a water tank and a thermostatic valve. The thermostatic valve includes a valve body and a valve core. The valve body includes a cold water inlet, a hot water inlet, and a mixing outlet. Cold water flowing into the valve body via the cold water inlet can flow into the water tank and the mixing outlet. The hot water inlet allows hot water in the water tank to flow into the mixing outlet. The valve core controls the mixing ratio of cold and hot water flowing into the mixing outlet to achieve constant temperature water output. The electric water heating device also includes an inlet pipe and an outlet pipe. The inlet pipe inputs cold water flowing into the valve body via the cold water inlet into the water tank, and the outlet pipe inputs hot water in the water tank into the hot water inlet. The water tank has an upper temperature sensor located at the top of the water tank to detect the water temperature at the top of the water tank. The electric water heating device also includes a control board electrically connected to the upper temperature sensor and also electrically connected to a motor for driving the valve core to control the opening degree of the valve core based at least on the detected water temperature at the top of the water tank. In one embodiment, the upper temperature sensor is positioned near the inlet of the outlet pipe, enabling it to accurately detect the temperature of the hot water flowing into the thermostatic valve through the outlet pipe's inlet. In another embodiment, the upper temperature sensor is positioned laterally away from the outlet pipe's inlet and vertically close to or flush with it in the vertical direction. Because the water temperature within the tank exhibits stratification—heated hot water gradually rises to the top while cold water sinks to the bottom—positioning the upper temperature sensor vertically near or flush with the outlet pipe's inlet ensures that the temperature detected by the upper temperature sensor is close to the temperature of the hot water flowing into the thermostatic valve through the outlet pipe's inlet. When using a thermostatic valve for pre-adjustment, the control board can reuse the water temperature detected by the upper temperature sensor of the water tank as the temperature of the hot water flowing into the mixing outlet of the thermostatic valve, and drive the motor to control the valve core opening based on this, without needing to install a hot water temperature probe on the thermostatic valve. This reduces the manufacturing cost of the thermostatic valve, reduces potential leakage points, and thus lowers the possibility of leakage, improving the reliability of the thermostatic valve. In other words, the electric water heater in this embodiment, by cleverly setting the positional relationship between the upper temperature sensor and the inlet of the outlet pipe, enables the reuse of the upper temperature sensor for reliable pre-adjustment of the thermostatic valve core, reducing costs and enhancing the reliability of the thermostatic valve while ensuring a good user experience.

[0034] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Features described and / or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0035] It should be emphasized that the term "comprising / including" as used herein refers to the presence of a feature, part, or component, but does not exclude the presence or addition of one or more other features, parts, or components. Attached Figure Description

[0036] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances. In the drawings:

[0037] Figure 1 A three-dimensional structural schematic diagram of an electric water heater device according to one embodiment of this specification is shown;

[0038] Figure 2 A cross-sectional view of an electric water heater device according to one embodiment of this specification is shown;

[0039] Figure 3 A three-dimensional structural schematic diagram of a thermostatic valve according to one embodiment of this specification is shown;

[0040] Figure 4 A cross-sectional view of a thermostatic valve according to one embodiment of this specification is shown;

[0041] Figure 5 A cross-sectional view of a thermostatic valve according to one embodiment of this specification is shown;

[0042] Figure 6 A partial cross-sectional view showing the thermostatic valve communicating with the water tank in one embodiment of this specification is shown;

[0043] Figure 7 A schematic diagram of the valve core structure in one embodiment of this specification is shown;

[0044] Figure 8 This specification shows a schematic diagram of the structure of the moving valve plate and the stationary valve plate in a valve core according to one embodiment;

[0045] Figure 9 A schematic diagram of the flow path inside a thermostatic valve in one embodiment of this specification is shown.

[0046] The reference numerals in the above figures are as follows:

[0047] 10. Electric water heater; 100. Thermostatic valve; 101. Valve body; 102. Valve core; 110. Cold water chamber; 111. First cold water connection; 112. Second cold water connection; 113. Cold water inlet; 114. Cold water outlet; 115. Hot water inlet; 116. Mixing water outlet; 1101. First cold water outlet; 1102. Second cold water outlet; 121. Moving valve plate; 122. Fixed valve plate; 1221. First cold water outlet; 1222. Second cold water outlet; 1223. Cold water inlet; 200. Water tank; 201. Same outlet; 202. Upper temperature sensor; 203. Lower temperature sensor; 204. Heating rod; 301. Inlet pipe; 302. Outlet pipe. Detailed Implementation

[0048] The principles and spirit of this specification will now be described with reference to several exemplary embodiments. It should be understood that these embodiments are given merely to enable those skilled in the art to better understand and implement this specification, and are not intended to limit the scope of this specification in any way. Rather, these embodiments are provided to make this disclosure more thorough and complete, and to fully convey the scope of this disclosure to those skilled in the art.

[0049] The details of this utility model can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of this utility model described herein are only for explaining the purpose of this utility model and should not be construed as limiting this utility model in any way. Under the teachings of this utility model, those skilled in the art can conceive of any possible modifications based on this utility model, and these should all be considered to fall within the scope of this utility model. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "connected" should be interpreted broadly, for example, it can be a mechanical connection or an electrical connection, or it can be a connection within two elements, which can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this specification. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0051] This specification provides an example of an electric water heater. Figure 1 and Figure 2 A perspective structural diagram and a cross-sectional schematic diagram of an electric water heater according to one embodiment of this specification are shown respectively. Figure 2 The left image is a front cross-sectional view of an electric water heater. Figure 2 The right figure is a right cross-sectional view of an electric water heater. For example... Figure 2 As shown, the electric water heater 10 may include a thermostatic valve 100 and a water tank 200.

[0052] Please refer to Figures 3 to 6 The diagrams show a schematic diagram, cross-sectional view, and section view of the thermostatic valve in the embodiments of this specification, as well as a partial cross-sectional view showing the thermostatic valve communicating with the water tank. Figures 3 to 6 As shown, the thermostatic valve 100 may include a valve body 101 and a valve core 102. The valve body 101 may include a cold water inlet 113, a hot water inlet 115, and a mixing water outlet 116. The inlet of the cold water inlet 113 can be connected to a cold water source, allowing cold water from the cold water source to flow into the valve body 101 of the thermostatic valve 100. The outlet of the cold water inlet 113 is connected to the water tank 200 and the mixing water outlet 116, respectively. The cold water flowing into the valve body 101 via the cold water inlet 113 can flow into the water tank 200 and the mixing water outlet 116. The hot water inlet 115 is used to connect the water tank 200 and the mixing water outlet 116. The inlet of the hot water inlet 115 is connected to the water tank 200, and the outlet of the hot water inlet 115 is connected to the mixing water outlet 116. Hot water in the water tank 200 can flow into the mixing outlet 116 via the hot water inlet 115. The valve core 102 is used to control the mixing ratio of cold water and hot water flowing into the mixing outlet 116. The outlet of the mixing outlet 116 is used to output the mixed water.

[0053] In this embodiment, the terms "inlet" or "outlet" in the hot water inlet 115, cold water inlet 113, and mixing water outlet 116 are all relative to the thermostatic valve 100. "Inlet" means water flowing into the thermostatic valve 100, and "outlet" means water flowing out of the thermostatic valve 100. Furthermore, the concept of cold water can be water at the same temperature as tap water, or it can be a relative concept, water that is colder than the water in the hot water inlet 115 (such as water that is preheated to a temperature higher than tap water but lower than the water in the hot water inlet 115).

[0054] like Figure 2 and Figure 6 As shown, the electric water heater 10 may further include an inlet pipe 301 and an outlet pipe 302. At least a portion of the inlet pipe 301 and at least a portion of the outlet pipe 302 are disposed in the water tank 200. The inlet pipe 301 is connected to the cold water inlet section 113. The inlet pipe 301 is used to input cold water flowing into the valve body 101 via the cold water inlet section 113 into the water tank 200. The outlet pipe 302 is connected to the hot water inlet section 115. The outlet pipe 302 is used to input hot water from the water tank 200 into the hot water inlet section 115. By providing the inlet pipe 301 and the outlet pipe 302, cold water flowing into the valve body 101 of the thermostatic valve 100 via the cold water inlet section 113 can be input into the water tank 200, and hot water in the water tank 200 can be forced into the hot water pipe and output to the hot water inlet section 115 of the thermostatic valve 100.

[0055] In this embodiment, "in" and "out" in inlet pipe 301 and outlet pipe 302 are relative to the water tank 200 of the electric water heater. The pipe for water to flow out of the water tank 200 is outlet pipe 302, and the pipe for water to flow into the water tank 200 is inlet pipe 301.

[0056] Typically, the inlet of the outlet pipe 302 is located at the top of the water tank 200. This is because there is a stratification of water temperature within the water tank 200; heated hot water gradually rises to the top of the water tank 200, while cold water sinks to the bottom. By placing the inlet of the outlet pipe 302 at the top of the water tank 200, hotter water can flow into the outlet pipe 302 and then into the valve body 101 of the thermostatic valve 100 via the hot water inlet 115.

[0057] like Figure 2 As shown, the water tank 200 has an upper temperature sensor 202. The upper temperature sensor 202 is located at the top of the water tank 200 to detect the water temperature at the top of the water tank. By setting the upper temperature sensor 202 at the top of the water tank 200, the water temperature detected by the upper temperature sensor 202 is close to the water temperature of the hot water flowing into the hot water inlet 115.

[0058] In one embodiment, the upper temperature sensor 202 is positioned close to the inlet of the outlet pipe 302, so that the upper temperature sensor 202 can accurately detect the temperature of the hot water flowing into the thermostatic valve 100 through the inlet pipe 301 of the outlet pipe 302.

[0059] In the embodiments of this specification, A being spatially close to B means that the spatial distance between A and B is small, for example, the spatial distance between the two is less than a preset distance.

[0060] In another embodiment, the upper temperature sensor 202 is positioned laterally away from the inlet of the outlet pipe 302 and vertically close to or flush with the inlet of the outlet pipe 302.

[0061] In the embodiments of this specification, "A is farther away from B in the horizontal direction" means that the horizontal distance between A and B is greater than a preset distance. Here, "horizontal" can refer to the direction perpendicular to the height direction, and the horizontal distance is the distance in the horizontal plane. "A is closer to B in the height direction" means that the absolute value of the height difference between A and B is less than a preset height difference. That is, A is slightly higher than B or slightly lower than B.

[0062] Because the water temperature inside the water tank 200 exhibits a stratification phenomenon—that is, the heated hot water gradually rises to the top of the water tank 200 while the cold water sinks to the bottom—by setting the upper temperature sensor 202 close to the inlet of the outlet pipe 302 in the height direction or setting it to be flush with the inlet of the outlet pipe 302 in the height direction, the water temperature detected by the upper temperature sensor 202 is made close to the water temperature of the hot water flowing into the thermostatic valve 100 through the inlet of the outlet pipe 302.

[0063] The electric water heater 10 may also include a control board. The control board (not shown) may be electrically connected to the upper temperature sensor 202. The control board is also electrically connected to a motor (not shown) for driving the valve core 102 to control the opening degree of the valve core 102, at least according to the water temperature at the top of the water tank.

[0064] In other words, when using the thermostatic valve 100 for pre-adjustment, the control board can reuse the water temperature detected by the upper temperature sensor 202 of the water tank 200 as the water temperature of the hot water flowing into the mixing outlet 116 of the thermostatic valve 100, and drive the motor to control the opening of the valve core 102 based on this, without having to install a hot water temperature probe on the thermostatic valve 100. This can reduce the manufacturing cost of the thermostatic valve 100, reduce potential leaks in the thermostatic valve 100, thereby reducing the possibility of water leakage and improving the reliability of the thermostatic valve.

[0065] That is, the electric water heater in this embodiment cleverly sets the positional relationship between the upper temperature sensor 202 and the inlet of the outlet pipe 302, so that the upper temperature sensor 202 can be reused to reliably pre-adjust the thermostatic valve core, thereby reducing costs and enhancing the reliability of the thermostatic valve while ensuring the user's water experience.

[0066] In some embodiments of this specification, at least a portion of the upper temperature sensor 202 is located within the water tank 200. The temperature sensor can be positioned spatially close to the inlet of the outlet pipe 302 to accurately detect the temperature of the hot water flowing into the thermostatic valve 100, thereby improving the accuracy of the pre-adjustment of the thermostatic valve 100.

[0067] In some embodiments of this specification, such as Figure 2 As shown, the upper temperature sensor 202 is disposed on the outer wall of the water tank 200. When the upper temperature sensor 202 is disposed on the outer wall of the water tank 200, it can be positioned close to the inlet of the outlet pipe 302 in the height direction, or flush with the inlet of the outlet pipe 302 in the height direction, to more accurately detect the temperature of the hot water flowing into the thermostatic valve 100, thereby improving the accuracy of the pre-adjustment of the thermostatic valve 100. Furthermore, by disposing of the upper temperature sensor 202 outside the water tank 200, the manufacturing process of the water tank 200 can be simplified, reducing manufacturing costs.

[0068] like Figure 2 As shown, in some embodiments of this specification, the water tank 200 also includes a lower temperature sensor 203, which is located at the bottom of the water tank 200 to detect the water temperature at the bottom. Since the water temperature inside the water tank 200 exhibits stratification, by placing the lower temperature sensor 203 at the bottom of the water tank 200, the temperature of the cold water flowing into the water tank 200 from the cold water inlet 113 via the inlet pipe 301 can be detected more accurately. The control board is also electrically connected to the lower temperature sensor 203 and is used to control the opening degree of the valve core 102 based on the water temperature at the top and bottom of the water tank. In one embodiment, the opening degree of the valve core 102 can be controlled based on the water temperature at the top and bottom of the water tank, as well as the target set outlet water temperature of the electric water heater.

[0069] When using the thermostatic valve 100 for pre-adjustment, the control board can also reuse the water temperature at the bottom of the water tank detected by the temperature sensor 203 at the bottom of the water tank 200 as the water temperature of the cold water flowing from the cold water inlet 113 into the mixed water outlet 116, without the need to install a cold water temperature probe in the thermostatic valve 100. This can reduce the manufacturing cost of the thermostatic valve 100, reduce potential leaks in the thermostatic valve 100, thereby reducing the possibility of water leakage and improving the reliability of the thermostatic valve 100.

[0070] In some embodiments of this specification, the lower temperature sensor 203 may be positioned spatially close to the outlet of the water inlet pipe 301. By positioning the lower temperature sensor 203 close to the outlet of the water inlet pipe 301, the temperature of the cold water flowing into the water tank 200 from the cold water inlet section 113 can be detected more accurately, thereby improving the accuracy of the pre-adjustment of the thermostatic valve 100.

[0071] In some embodiments of this specification, the lower temperature sensor 203 may be positioned close to the outlet of the water inlet pipe 301 in the height direction, or the lower temperature sensor 203 may be flush with the outlet of the water inlet pipe 301 in the height direction. This allows the water temperature detected by the lower temperature sensor 203 to be closer to the temperature of the cold water flowing out of the outlet of the water inlet pipe 301.

[0072] like Figure 2 As shown, in some embodiments of this specification, the lower temperature sensor 203 may be configured to be higher than the outlet of the water inlet pipe 301 and closer to the outlet of the water inlet pipe 301 than the upper temperature sensor 202.

[0073] like Figure 2 As shown, the water tank 200 may also include a heating rod 204. Typically, to detect the heating effect of the heating rod 204 on the water inside the water tank 200, the lower temperature sensor 203 is positioned higher than the heating rod 204 in the height direction. The heating rod 204 is typically positioned higher than or level with the outlet of the inlet pipe 301 in the height direction. Therefore, the lower temperature sensor 203 can be positioned higher than the outlet of the inlet pipe 301. Based on the water temperature at the bottom of the water tank detected by the lower temperature sensor 203 and the water temperature at the top of the water tank detected by the upper temperature sensor 202, the overall heating status of the water inside the water tank 200 can be determined, and the starting and stopping of the heating rod 204 can be controlled according to the water heating status. The upper temperature sensor 202 is used to detect the water temperature at the top of the water tank, and the lower temperature sensor 203 is used to detect the water temperature at the bottom of the water tank. The upper temperature sensor 202 is higher than the lower temperature sensor 203, and the lower temperature sensor 203 is higher than the outlet of the inlet pipe 301.

[0074] In the above embodiments, by setting the lower temperature sensor 203 higher than the outlet of the water inlet pipe 301 and closer to the outlet of the water inlet pipe 301 than the upper temperature sensor 202, the water temperature detected by the lower temperature sensor 203 can be used not only for the pre-adjustment of the thermostatic valve 100, but also for controlling the start and stop of the heating rod 204.

[0075] Similarly, in some embodiments of this specification, at least part of the lower temperature sensor 203 is located in the water tank 200, or the lower temperature sensor 203 is disposed on the outer wall of the water tank 200.

[0076] In some embodiments of this specification, the heating rod 204 can start and / or stop working based on the water temperature at the top and / or bottom of the water tank. In one embodiment, the heating rod 204 can be controlled to stop working based on both the water temperature at the top and bottom of the water tank. For example, the heating rod 204 can be controlled to stop working when the water temperature at the top of the water tank reaches the target set temperature of the water heater and the water temperature at the bottom of the water tank reaches the target set temperature of the water heater minus a preset temperature difference.

[0077] In another embodiment, the heating rod 204 can be activated based on the water temperature at the top or bottom of the water tank. For example, the heating rod 204 is activated when the water temperature at the top of the water tank is lower than or equal to the target set temperature minus a first preset temperature difference, or when the water temperature at the bottom of the water tank is lower than or equal to the target set temperature minus a second preset temperature difference. The first preset temperature difference is less than the second preset temperature difference.

[0078] In another embodiment, the heating rod 204 can be controlled to stop working based on the rate at which the water temperature at the bottom of the water tank decreases. For example, when the rate at which the water temperature at the bottom of the water tank decreases is greater than a preset rate, the heating rod 204 can be controlled to start working.

[0079] In some embodiments of this specification, such as Figure 2 As shown, the water tank 200 may include an upper tank and a lower tank. The upper tank is connected to the lower tank, and the upper tank is located above the lower tank. An upper temperature sensor 202 may be disposed in the upper tank, and a lower temperature sensor 203 may be disposed in the lower tank. The lower temperature sensor 203 may be disposed above the heating rod 204 in the lower tank.

[0080] In some embodiments of this specification, the electric water heater 10 may further include a mixing temperature sensor. The mixing temperature sensor is used to detect the temperature of the mixed water outlet at the outlet of the mixing outlet 116. The mixing temperature sensor may be positioned close to the outlet of the mixing outlet 116. The thermostatic valve 100 may further include a motor. The motor is used to drive the valve core 102 to adjust the mixing ratio of cold water and hot water flowing into the mixing outlet 116. When the thermostatic valve 100 performs feedback adjustment, the motor can be driven to adjust the mixing ratio of cold water and hot water flowing into the mixing outlet 116 based on the mixing temperature detected by the mixing temperature sensor and the target set temperature of the electric water heater 10.

[0081] Please continue to refer to this. Figures 3 to 6 In some embodiments of this specification, the valve body 101 may further include a cold water chamber 110, a first cold water communication portion 111, a second cold water communication portion 112, and a cold water outlet portion 114. In this embodiment, the term "outflow" in the cold water outlet portion 114 is also relative to the thermostatic valve 100, and "outflow" means that water flows out of the thermostatic valve 100.

[0082] like Figure 6 As shown, the hot water inlet 115 and the cold water outlet 114 are connected to the water tank 200 through the same opening. In this embodiment, by connecting the hot water inlet 115 and the cold water outlet 114 to the water tank 200 through the same opening, only one opening needs to be provided on the water tank 200, which simplifies the process and reduces the number of leakage points.

[0083] like Figures 4 to 6 As shown, the cold water inlet 113 is connected to the cold water chamber 110, and cold water flowing in through the cold water inlet 113 enters the cold water chamber 110. A valve core 102 is disposed inside the cold water chamber 110. The valve core 102 is used to divert the water entering the cold water chamber 110 through the cold water inlet 113 to the first cold water connecting part 111 and the second cold water connecting part 112. Specifically, after the cold water in the cold water inlet 113 flows into the cold water chamber 110, it enters the valve core 102, and then flows out through the valve core 102 to the first cold water connecting part 111 and the second cold water connecting part 112. The first cold water connecting part 111 connects the cold water chamber 110 and the cold water outlet 114, and the cold water outlet 114 allows cold water to flow into the water tank 200 through the same opening on the water tank 200. The second cold water connection 112 connects the cold water chamber 110 to the mixing water outlet 116. The hot water inlet 115 allows hot water from the water tank 200 to flow into the mixing water outlet 116 through the same opening on the water tank 200. Compared to directly adjusting the mixing ratio of cold and hot water via the valve core 102, this embodiment uses the valve core 102 to adjust the ratio of cold water diverted from the cold water chamber 110 to the first cold water connection 111 and the second cold water connection 112. This indirectly adjusts the ratio of cold and hot water flowing into the mixing water outlet 116, achieving temperature regulation of the mixing water outlet and preventing scale buildup on the valve core 102 due to contact with hot water. Simultaneously... Figures 3 to 6 As shown, the first cold water connection part 111 and the second cold water connection part 112 have a preset length, which can also separate the valve core 102 in the cold water chamber from the cold water outlet part 114 and / or the hot water inlet part 115, and avoid the hot water directly or indirectly interfering with the valve core 102, thereby improving the reliability of the thermostatic valve 100 and the accuracy of water temperature regulation.

[0084] The mixing outlet 116 can mix cold water flowing in from the second cold water connection 112 and hot water flowing in from the hot water inlet 115. That is, the mixing outlet 116 is used to mix cold water and hot water and then output the mixed water. The inlet of the mixing outlet 116 is connected to both the second cold water connection 112 and the hot water inlet 115. The outlet of the mixing outlet 116 is used to output the mixed water.

[0085] In one embodiment, the mixing outlet 116 is provided with a first inlet and a second inlet. The mixing outlet 116 is connected to the second cold water communication section 112 through the first inlet and to the hot water inlet section 115 through the second inlet. The first inlet may include one or more inlets. The second inlet may include one or more inlets. The first inlet and the second inlet may be the same inlet or different inlets.

[0086] The hot water flow channel formed in the hot water inlet section 115 and the cold water flow channel formed in the cold water outlet section 114 are independent of each other. For example... Figures 3 to 6 As shown, at least a portion of the hot water inlet 115 is located inside the cold water outlet 114. Correspondingly, at least a portion of the outlet pipe communicating with the hot water inlet 115 is located inside the inlet pipe communicating with the cold water outlet 114. In this embodiment, "at least a portion of A is located inside B" means that at least a portion of the cross-section of A is located inside the cross-section of B, that is, the cross-section of B surrounds at least a portion of the cross-section of A. Figure 5 and Figure 6 As shown in the embodiments of this specification, the x-direction is the transverse direction, and the z-direction is the longitudinal direction (i.e., the height direction). The cross-section in the embodiments of this specification refers to the cross-section obtained by cutting along a direction perpendicular to the z-direction.

[0087] In this embodiment, by configuring at least a portion of the hot water inlet 115 of the thermostatic valve 100 inside the cold water outlet 114, the hot water inlet 115 and the cold water outlet 114 are arranged relatively compactly, which reduces the size of the thermostatic valve 100 and thus lowers its manufacturing cost. Furthermore, the size of the same opening required on the water tank 200 of the electric water heater can be reduced, simplifying the sealing process and thus reducing the possibility of leakage.

[0088] In some embodiments of this specification, the cold water chamber 110 is provided with a cold water inlet (not shown in the figure), a first cold water outlet 1101, and a second cold water outlet 1102. The cold water inlet is connected to the cold water inlet section 113, allowing water in the cold water inlet section 113 to enter the cold water chamber 110 via the cold water inlet. The first cold water outlet 1101 is connected to the first cold water connecting section 111, allowing water in the cold water chamber 110 to flow to the first cold water connecting section 111 via the first cold water outlet 1101. The second cold water outlet 1102 is connected to the second cold water connecting section 112, allowing water in the cold water chamber 110 to flow to the second cold water connecting section 112 via the second cold water outlet 1102. By providing a cold water inlet, a first cold water outlet 1101, and a second cold water outlet 1102 on the cold water chamber 110, the cold water chamber 110 is connected to the cold water inlet 113, the first cold water connecting part 111, and the second cold water connecting part 112.

[0089] like Figures 4 to 6As shown, in some embodiments of this specification, the first cold water outlet 1101 and the second cold water outlet 1102 are disposed on the same surface of the cold water cavity 110. The cold water cavity 110 may include multiple surfaces. The first cold water outlet 1101 and the second cold water outlet 1102 may be disposed on the same surface of the cold water cavity 110. By disposing the first cold water outlet 1101 and the second cold water outlet 1102 on the same surface of the cold water cavity 110, the two cold water outlet directions of the cold water cavity 110 are aligned. Compared to setting the two cold water outlet directions to be inconsistent, in this embodiment, setting the cold water outlet directions of the first cold water outlet 1101 and the second cold water outlet 1102 to be substantially aligned ensures that the valve body 101 has a smaller volume, while facilitating the guidance of the water from the two cold water outlets to the cold water outlet section 114 and the mixing water outlet section 116, respectively.

[0090] In some embodiments of this specification, the cold water inlet (not shown in the figure) is disposed on the same surface. Compared to disposing the cold water inlet on a different surface from the first cold water outlet 1101 and the second cold water outlet 1102, this embodiment simplifies the valve core structure, simplifies the manufacturing process, and increases reliability by disposing the cold water inlet, the first cold water outlet 1101, and the second cold water outlet 1102 on the same surface.

[0091] like Figures 4 to 6 As shown, in some embodiments of this specification, the same surface is the surface of the cold water cavity 110 facing the cold water outlet 114 and the mixed water outlet 116. Compared to placing the first cold water outlet 1101 and the second cold water outlet 1102 on other surfaces of the cold water chamber 110, in this embodiment, the first cold water outlet 1101 and the second cold water outlet 1102 are placed on the surfaces of the cold water chamber 110 facing the cold water outlet 114 and the mixing water outlet 116. This facilitates the connection between the cold water chamber 110 and the cold water outlet 114 and the mixing water outlet 116, shortens the distance between the cold water chamber 110 and the cold water outlet 114 and the mixing water outlet 116, reduces the length of the first cold water connection 111 and the second cold water connection 112, reduces the complexity of the valve body 101 structure of the thermostatic valve 100, reduces the size of the valve body 101, thereby reducing the manufacturing cost of the thermostatic valve 100, and the manufacturing process of the valve body 101 is simpler.

[0092] Please refer to Figure 7 and Figure 8 The diagram shows a schematic representation of the valve core in an embodiment of this specification. Figure 8As shown in some embodiments of this specification, the valve core 102 may include a movable valve plate 121 and a fixed valve plate 122. The fixed valve plate 122 is provided with a first cold water outlet 1221 and a second cold water outlet 1222. The first cold water outlet 1221 is used to communicate with a first cold water outlet 1101. The second cold water outlet 1222 is used to communicate with a second cold water outlet 1102. The first cold water outlet 1101 and the second cold water outlet 1102 are located on the same surface of the cold water chamber 110. At least a portion of the water flowing into the cold water chamber 110 from the cold water inlet 113 can flow through the first cold water outlet 1221 on the fixed valve plate 122 to the first cold water outlet 1101 on the cold water chamber 110, and then through the first cold water connecting part 111 to the cold water outlet 114. At least a portion of the water flowing into the cold water chamber 110 from the cold water inlet 113 can flow through the second cold water outlet 1222 on the fixed valve plate 122 to the second cold water outlet 1102 on the cold water chamber 110, and then through the second cold water connecting part 112 to the mixing water outlet 116. The movable valve plate 121 is used to control the connection between the cold water inlet 113 and the first cold water outlet 1221 and the second cold water outlet 1222, thereby controlling the ratio of water flow to the cold water outlet 114 and the mixing water outlet 116. Compared to setting the first cold water outlet 1221 and the second cold water outlet 1222 on different valve plates, in this embodiment, by setting the first cold water outlet 1101 and the second cold water outlet 1102 on the same side of the cold water cavity 110 and setting both the first cold water outlet 1221 and the second cold water outlet 1222 on the fixed valve plate 122, the cold water cavity 110 and the valve core 102 can be better matched, and there is no need to add a bending flow channel in the cold water cavity 110, making the manufacturing process simpler.

[0093] like Figure 7 and Figure 8 As shown, the fixed valve plate 122 is also provided with a cold water inlet 1223, which is connected to the cold water inlet on the cold water chamber 110. Water flowing into the cold water inlet section 113 can flow through the cold water inlet on the cold water chamber 110 to the cold water inlet 1223 on the fixed valve plate 122, and then flow into the cold water chamber 110.

[0094] In some embodiments of this specification, the first cold water outlet 1101 and the second cold water outlet 1102 at least partially overlap in the lateral direction. Here, "lateral direction" refers to their projections onto a horizontal plane (i.e., a plane perpendicular to the z-direction). The at least partial overlap in the lateral direction means that the projections of the first cold water outlet 1101 and the second cold water outlet 1102 onto the horizontal plane at least partially overlap. This results in a smaller overall thickness of the valve body 101 (i.e., the dimension of the valve body 101 in the y-direction). When installed on an electric water heater, this reduces the local thickness of the electric water heater (i.e., the dimension of the electric water heater in the y-direction), reduces the installation volume of the thermostatic valve 100, and increases the distance between the thermostatic valve and the wall, thereby ensuring sufficient operating space for the external piping. Furthermore, it facilitates installation onto the water tank 200 of the electric water heater while maintaining sufficient water flow, thus reducing manufacturing costs. For example, when the valve body 101 of the thermostatic valve is installed with the water tank 200 of the electric water heater via a flange, if the size of the valve body 101 is too large, it cannot be adapted to the flange studs on the conventional water tank 200, and the flange studs on the water tank 200 need to be redeveloped, resulting in high costs. If the diameter of the first cold water outlet 1101 and the second cold water outlet 1102 is reduced due to size issues, the water flow rate cannot be guaranteed.

[0095] In some embodiments of this specification, the first cold water outlet 1101 and the second cold water outlet 1102 do not overlap in the lateral direction, but the lateral distance between them is less than a first preset distance. That is, the projections of the first cold water outlet 1101 and the second cold water outlet 1102 on the horizontal plane do not overlap, and the distance between the projections is less than the first preset distance. In other words, the first cold water outlet 1101 and the second cold water outlet 1102 are arranged close to each other in the lateral direction. Although the effect is not optimal compared with the previous embodiment, it is still an improvement with beneficial effects. It can reduce the overall thickness of the valve body 101 to a certain extent, reduce the manufacturing cost to a certain extent, facilitate installation on the water tank 200 of the electric water heater to a certain extent, and reduce the installation thickness of the thermostatic valve 100 to a certain extent, thereby reducing the installation volume of the thermostatic valve 100 to a certain extent.

[0096] like Figures 3 to 6As shown, in some embodiments of this specification, the first cold water connection 111 and the second cold water connection 112 extend in the same direction. The first cold water connection 111 extends from the cold water chamber 110 to the cold water outlet 114. The second cold water connection 112 extends from the cold water chamber 110 to the mixed water outlet 116. Their extension directions are generally the same. "Generally the same" can mean that their extension directions are parallel or nearly parallel. For example, the extension direction of the first cold water connection 111 may be slightly inclined relative to the extension direction of the second cold water connection 112, with the angle of inclination being less than a preset angle. Or, for example, the extension paths of the first cold water connection 111 and / or the second cold water connection 112 may have bends, but they still generally extend towards the cold water outlet 114 and the mixed water outlet 116. By setting the extension directions of the first cold water connection 111 and the second cold water connection 112 to be generally the same, the size of the valve body 101 can be reduced, thus lowering costs.

[0097] In some embodiments of this specification, the first cold water connection portion 111 may include a first cold water connecting pipe. The second cold water connection portion 112 may include a second cold water connecting pipe. The first cold water connecting pipe and the second cold water connecting pipe are arranged in parallel. In this embodiment, the connection portion is arranged in the form of a connecting pipe, and the first cold water connecting pipe and the second cold water connecting pipe are parallel to each other. Compared to a non-parallel arrangement of the first cold water connecting pipe and the second cold water connecting pipe, this embodiment, by arranging the first cold water connecting pipe and the second cold water connecting pipe in parallel, can reduce the volume of the valve body 101, simplify the structure, and reduce manufacturing costs.

[0098] Please refer to Figure 9 A cross-sectional view of the thermostatic valve in an embodiment of this specification is shown. Figure 9 As shown, in some embodiments of this specification, at least part of the hot water inlet 115 is located inside the cold water outlet 114. The first cold water connecting part 111 is higher than the second cold water connecting part 112. The first cold water connecting part 111 extends from the cold water cavity 110 toward the cold water outlet 114. The second cold water connecting part 112 extends from the cold water cavity 110 toward the mixed water outlet 116. The cold water flow channels in the cold water outlet 114 and the cold water flow channels in the second cold water connecting part 112 do not intersect. Here, "not intersecting" means that the projections of the cold water flow channels in the cold water outlet 114 and the cold water flow channels in the second cold water connecting part 112 on the xz plane do not intersect. By setting at least part of the hot water inlet 115 inside the cold water outlet 114 and setting the first cold water connecting part 111 higher than the second cold water connecting part 112, the cold water flow channels in the cold water outlet 114 and the cold water flow channels in the second cold water connecting part 112 do not intersect.

[0099] In some embodiments of this specification, the cold water chamber 110 and the cold water outlet 114 and / or the hot water inlet 115 are spaced apart by a predetermined distance in the horizontal and / or vertical directions to be independently arranged. The first cold water connecting part 111 has a first cold water connecting pipe of a predetermined length, which connects the cold water chamber 110 and the cold water outlet 114. The second cold water connecting part 112 has a second cold water connecting pipe of a predetermined length, which connects the cold water chamber 110 and the mixing water outlet 116.

[0100] In this embodiment, "horizontal" can refer to the horizontal direction, parallel to the mounting wall surface, i.e., the x-direction. "Vertical" can refer to the vertical direction, parallel to the mounting wall surface, i.e., the z-direction. In one embodiment, such as... Figures 3 to 6 As shown, the cold water chamber 110 and the cold water outlet 114 and / or the hot water inlet 115 are spaced apart by a predetermined distance in the lateral direction.

[0101] In another embodiment, the cold water chamber 110 is longitudinally spaced from the cold water outlet 114 and / or the hot water inlet 115 by a predetermined distance.

[0102] In another embodiment, the cold water chamber 110 and the cold water outlet 114 and / or the hot water inlet 115 are spaced apart by a predetermined distance in both the horizontal and vertical directions.

[0103] The cold water chamber 110 is connected to the cold water outlet 114 via a first cold water connecting pipe of a preset length. The cold water chamber 110 is connected to the hot water inlet 115 via a second cold water connecting pipe of a preset length. By setting the cold water chamber 110 and the cold water outlet 114 and / or the hot water inlet 115 at a preset distance, the valve core 102 in the cold water chamber 110 is kept away from the hot water inlet 115. This prevents the valve core 102 from clogging the valve core inlet due to scale buildup from contact with hot water, which could lead to valve core failure. It also prevents the plastic parts and seals in the valve core 102 from having their service life affected due to proximity to hot water, thus reducing reliability. This improves the reliability of the thermostatic valve 100 and the accuracy of water temperature regulation.

[0104] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this specification should not be determined by reference to the above description, but rather by reference to the foregoing claims and the full scope of their equivalents.

[0105] The above description is merely a preferred embodiment of this specification and is not intended to limit this specification. Various modifications and variations can be made to the embodiments described herein by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of protection of this specification.

Claims

1. An electric water heating device, characterized in that, the electric water heating device comprises a water tank and a thermostatic valve; the water tank is provided with an upper temperature sensor, which is arranged at an upper portion of the water tank to detect the temperature of water at the upper portion of the water tank; the thermostatic valve comprises a valve body and a valve core; the valve body comprises a cold water inlet portion, a hot water inlet portion and a mixed water outlet portion; the cold water inlet portion is in communication with the water tank and the mixed water outlet portion respectively, and cold water flowing into the valve body through the cold water inlet portion can flow into the water tank and the mixed water outlet portion; the hot water inlet portion is used to communicate the water tank and the mixed water outlet portion, so that hot water in the water tank can flow into the mixed water outlet portion; the valve core is used to control the mixing ratio of cold water and hot water flowing into the mixed water outlet portion; and the outlet of the mixed water outlet portion is used to output the mixed water; the electric water heating device further comprises a water inlet pipe and a water outlet pipe; at least part of the water inlet pipe and at least part of the water outlet pipe are arranged in the water tank; the water inlet pipe is in communication with the cold water inlet portion, and the water inlet pipe is used to input cold water flowing into the valve body through the cold water inlet portion into the water tank; the water outlet pipe is in communication with the hot water inlet portion, and the water outlet pipe is used to input hot water in the water tank into the hot water inlet portion; the electric water heating device further comprises a control panel, which is electrically connected with the upper temperature sensor, and the control panel is also electrically connected with a motor used to drive the valve core to act; the upper temperature sensor is arranged close to the water inlet of the water outlet pipe, or the upper temperature sensor is arranged away from the water inlet of the water outlet pipe in the transverse direction and close to or flush with the water inlet of the water outlet pipe in the height direction.

2. The electric water heating device according to claim 1, characterized in that, at least part of the upper temperature sensor is arranged in the water tank, or the upper temperature sensor is arranged on the outer wall of the water tank.

3. The electric water heating device according to claim 1, characterized in that, the water tank is further provided with a lower temperature sensor, which is arranged at a lower portion of the water tank to detect the temperature of water at the lower portion of the water tank; the control panel is further electrically connected with the lower temperature sensor, and the control panel is used to control the opening degree of the valve core according to the temperature of water at the upper portion of the water tank and the temperature of water at the lower portion of the water tank; the lower temperature sensor is arranged higher than the water outlet of the water inlet pipe, and the lower temperature sensor is closer to the water outlet of the water inlet pipe than the upper temperature sensor, or, the lower temperature sensor is arranged close to or flush with the water outlet of the water inlet pipe in the height direction.

4. The electric water heating device according to claim 1, characterized in that, the electric water heating device further comprises a mixed water temperature sensor, which is used to detect the temperature of mixed water output by the outlet of the mixed water outlet portion; and the thermostatic valve further comprises a motor, which is used to drive the valve core to act to adjust the mixing ratio of cold water and hot water flowing into the mixed water outlet portion.

5. The electric water heating device according to claim 1, characterized in that, The valve body further comprises a cold water cavity, a first cold water communication part, a second cold water communication part and a cold water outlet part; the cold water inlet part is in communication with the cold water cavity; the hot water inlet part and the cold water outlet part are used to communicate with the water bag through the same port on the water bag; The valve core is arranged in the cold water cavity; the valve core is used to make the water entering the cold water cavity be divided into the first cold water communication part and the second cold water communication part; the first cold water communication part is used to communicate the cold water cavity and the cold water outlet part, the cold water outlet part is used to make the cold water flow into the water bag through the same port on the water bag; the second cold water communication part is used to communicate the cold water cavity and the mixed water outlet part, and the hot water inlet part is used to make the hot water in the water bag flow into the mixed water outlet part through the same port on the water bag; The inlet of the mixed water outlet part is in communication with the second cold water communication part and the hot water inlet part; At least part of the hot water inlet part is located inside the cold water outlet part.

6. The electric water heating device according to claim 5, wherein The cold water cavity is provided with a cold water inlet, a first cold water outlet and a second cold water outlet; the cold water inlet is in communication with the cold water inlet part, the first cold water outlet is in communication with the first cold water communication part, and the second cold water outlet is in communication with the second cold water communication part; The first cold water outlet, the second cold water outlet and the cold water inlet are arranged on the same face of the cold water cavity; The same face is the face of the cold water cavity facing the cold water outlet part and the mixed water outlet part.

7. An electric water heating apparatus as claimed in claim 6, characterised in that The valve core comprises a movable valve plate and a fixed valve plate, the fixed valve plate is provided with a first cold water outlet and a second cold water outlet, the first cold water outlet is used to communicate with the first cold water outlet, and the second cold water outlet is used to communicate with the second cold water outlet, and the movable valve plate is used to control the communication relationship between the cold water inlet part and the first cold water outlet and the second cold water outlet.

8. The electric water heating apparatus according to claim 6, wherein The first cold water outlet and the second cold water outlet at least partially coincide in the transverse direction, or the first cold water outlet and the second cold water outlet do not coincide in the transverse direction but have a transverse spacing less than a first preset spacing; and / or The extension directions of the first cold water communication part and the second cold water communication part are the same as a whole; and / or The first cold water communication part comprises a first cold water communication pipe, and the second cold water communication part comprises a second cold water communication pipe, and the first cold water communication pipe and the second cold water communication pipe are arranged in parallel.

9. The electric water heating apparatus according to claim 5, wherein The first cold water communication part is higher than the second cold water communication part; the first cold water communication part extends from the cold water cavity to the cold water outlet part; the second cold water communication part extends from the cold water cavity to the mixed water outlet part; The cold water flow channel in the cold water outlet part and the cold water flow channel in the second cold water communication part are not staggered.

10. The electric water heating device according to claim 5, wherein The cold water cavity, the cold water outlet part and / or the hot water inlet part are independently arranged at a preset distance in the transverse direction and / or the longitudinal direction. The first cold water communication part has a first cold water communication pipe with a preset length, which is used for connecting the cold water cavity and the cold water outlet part; the second cold water communication part has a second cold water communication pipe with a preset length, which is used for connecting the cold water cavity and the mixed water outlet part.

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