Electric water heater

Abstract

The utility model discloses an electric water heater, including water bladder, phase change bladder, water supply pipeline, circulating pipeline and temperature regulating device, and phase change bladder includes heat exchanger, circulating pipeline is used to communicate the water bladder and heat exchanger, and one side of water supply pipeline can be communicated with water source, and temperature regulating device sets up on circulating pipeline, and the other side of water supply pipeline directly communicates with circulating pipeline and / or heat exchanger and / or water bladder or through temperature regulating device and circulating pipeline and / or heat exchanger and / or water bladder are communicated, and electric water heater includes first state and second state, when being in first state, temperature regulating device is used to make circulating pipeline conduction, and the water in water bladder can circulate and flow between water bladder and heat exchanger, when being in second state, the hot water of heat exchanger and / or the water bladder flow can mix with the cold water of part in water supply pipeline. The electric water heater provided in the application embodiment can guarantee efficient energy storage when storing heat, and can provide water with temperature meeting the setting requirement of user when using water.

Description

Technical Field

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

[0002] Traditional storage-type electric water heaters use water as the heat storage medium, and due to the limitation of water's specific heat capacity, the amount of hot water supplied is limited. Increasing the water volume requires a larger tank, taking up more indoor space. Furthermore, as hot water is released, the water temperature inside the tank gradually decreases, resulting in insufficient hot water temperature and volume to meet user needs. Overall, traditional storage-type electric water heaters, constrained by their size, have limited heat storage capacity and suffer from insufficient hot water supply.

[0003] To improve the heat storage capacity and increase the hot water supply of electric water heaters, phase change water heaters have emerged in the existing technology. These phase change water heaters rely on the physical state transformation of phase change materials to achieve heat storage and release. Before water is used, the phase change material absorbs heat from the heat source for heat storage. While having heat storage capabilities, phase change water heaters also need to have a water supply function, simultaneously delivering water to the user's terminal at a temperature that meets the user's set requirements. How to rationally and cleverly design the water circuit to achieve these multiple functions within a single circuit is a problem that those skilled in the art need to address.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application. Utility Model Content

[0005] In view of the shortcomings of the existing technology, this utility model provides an electric water heater that, through a reasonable and ingenious water circuit design, can not only ensure efficient energy storage, but also output water at a temperature that meets the user's set requirements to the user's water terminal.

[0006] The specific technical solution of this utility model embodiment is as follows:

[0007] An electric water heater includes: a water tank and a phase change tank, the phase change tank containing a phase change material for heat storage and release, and the phase change tank further including a heat exchanger; the electric water heater also includes a water supply pipe, a circulation pipe, and a temperature regulating device, the circulation pipe connecting the water tank and the heat exchanger, one side of the water supply pipe being connected to a water source, the temperature regulating device being disposed on the circulation pipe, and the other side of the water supply pipe being directly connected to the circulation pipe and / or the heat exchanger and / or the water tank, or connected to the circulation pipe and / or the heat exchanger and / or the water tank via the temperature regulating device; the electric water heater includes a first state and a second state, when the electric water heater is in the first state, the temperature regulating device is used to open the circulation pipe, and the water in the water tank... The water can circulate between the water tank and the heat exchanger; when the electric water heater is in the second state, under the control of the temperature regulating device, the water supply in the water supply pipeline can be diverted by the temperature regulating device, with part of the water supply flowing into the heat exchanger and / or the water tank, and the other part of the water supply mixing with the water flowing out of the heat exchanger and / or the water tank; or, under the control of the temperature regulating device, part of the water supply in the water supply pipeline flows into the heat exchanger and / or the water tank, and the water flowing out of the heat exchanger and / or the water tank flows into the temperature regulating device, and another part of the water supply in the water supply pipeline flows directly into the temperature regulating device; or, under the control of the temperature regulating device, part of the water supply flows into the heat exchanger, and another part of the water supply flows into the water tank, and the water flowing out of the heat exchanger mixes with the water flowing out of the water tank.

[0008] In a preferred embodiment, the heat exchanger and the water tank can be connected in series through the circulation pipeline to supply water. When the electric water heater is in the second state, part of the water supply in the water supply pipeline can flow directly or sequentially into the heat exchanger and the water tank through the temperature control device, or part of the water supply in the water supply pipeline can flow directly or sequentially into the water tank and the heat exchanger through the temperature control device.

[0009] In a preferred embodiment, the circulation pipeline includes a first circulation pipeline and a second circulation pipeline. The first circulation pipeline has a first inlet end and a first outlet end, with the first inlet end located in the water tank and the first outlet end located in the phase change tank. The second circulation pipeline has a second inlet end and a second outlet end, with the second inlet end located in the phase change tank and the second outlet end located in the water tank. The temperature regulating device is disposed on the first circulation pipeline or the second circulation pipeline.

[0010] In a preferred embodiment, the first water inlet is located at the upper part of the water tank, the first water outlet is located at the upper part of the phase change tank, the second water inlet is located at the lower part of the phase change tank, and the second water outlet is located at the lower part of the water tank.

[0011] In a preferred embodiment, the temperature regulating device is disposed on the first circulation pipeline, and the other side of the water supply pipeline is directly or through the temperature regulating device connected to the first circulation pipeline. When the electric water heater is in the second state, after the water supply in the water supply pipeline is diverted by the temperature regulating device, part of the water supply flows into the heat exchanger, the water flowing out of the heat exchanger enters the water tank through the second circulation pipeline, the water flowing out of the water tank flows out through the first circulation pipeline, and the other part of the water supply can mix with the water flowing out of the water tank; or, part of the water supply in the water supply pipeline flows into the heat exchanger, the water flowing out of the heat exchanger enters the water tank through the second circulation pipeline, the water flowing out of the water tank flows into the temperature regulating device through the first circulation pipeline, and the other part of the water supply in the water supply pipeline flows directly into the temperature regulating device.

[0012] In a preferred embodiment, the temperature regulating device is installed on the second circulation pipe. When the electric water heater is in the second state, the water supply in the water supply pipe is diverted by the temperature regulating device. Part of the water supply flows into the water tank, and the water flowing out of the water tank enters the heat exchanger through the first circulation pipe. The water flowing out of the heat exchanger flows out through the second circulation pipe, and the other part of the water supply can mix with the water flowing out of the heat exchanger. Alternatively, part of the water supply in the water supply pipe flows into the water tank, the water flowing out of the water tank enters the heat exchanger through the first circulation pipe, the water flowing out of the heat exchanger flows into the temperature regulating device through the second circulation pipe, and the other part of the water supply in the water supply pipe flows directly into the temperature regulating device.

[0013] In a preferred embodiment, the temperature regulating device includes at least a first interface, a second interface, and a third interface. The first interface is used to connect to the other side of the water supply pipeline. The second interface and the third interface are both connected to the first circulation pipeline, or both the second interface and the third interface are connected to the second circulation pipeline. When the electric water heater is in the first state, the third interface and the second interface are sequentially connected along the water flow direction, and the water in the water tank can circulate between the water tank and the heat exchanger. When the electric water heater is in the second state, the first interface can be connected to the second interface and the third interface.

[0014] In a preferred embodiment, when the electric water heater is in the first state, the third interface and the second interface are sequentially connected along the water flow direction, and the first interface is structurally connected to the second interface and / or the third interface, but not connected in the water path.

[0015] In a preferred embodiment, the temperature regulating device includes a valve body and a valve core disposed within the valve body. The first interface, the second interface, and the third interface are all disposed on the valve body. When the electric water heater is in the first state and the second state, the first interface is connected to the second interface and the third interface. When the electric water heater is in the first state, the valve core controls the opening degree of the second interface and the third interface to be equal. When the water heater switches from the first state to the second state, the valve core can adjust the opening degree of the second interface and the third interface.

[0016] In a preferred embodiment, the electric water heater further includes a water outlet pipe, one end of which is connected to the circulation pipe or the temperature control device, and the other end of which is used to connect to a water terminal.

[0017] In a preferred embodiment, when the electric water heater is in the first state, the third interface is located upstream of the second interface along the water flow direction, and the water in the circulation pipe flows from the third interface to the second interface; the temperature control device is used for diversion, and when the electric water heater is in the second state, the first interface is connected to the second interface and the third interface, and the water flowing in from the first interface is diverted to the second interface and the third interface.

[0018] In a preferred embodiment, the temperature control device further includes a fourth interface for connecting to the water outlet pipe. When the electric water heater is in the second state, the water supply in the water supply pipe can be diverted by the temperature control device. Part of the water supply flows into the heat exchanger and / or the water tank, while the other part of the water supply mixes with the water flowing out from the heat exchanger and / or the water tank within the temperature control device and flows to the water outlet pipe through the fourth interface.

[0019] In a preferred embodiment, the temperature regulating device further includes a fifth interface, wherein the second interface and the third interface are connected to one of the first circulation pipe and the second circulation pipe, and the fifth interface is connected to the other of the first circulation pipe and the second circulation pipe; the electric water heater also includes a third state, wherein when the electric water heater is in the third state, the first interface is connected to the fifth interface and the third interface, a portion of the water supply in the water supply pipe can flow into the water tank through the fifth interface, and another portion of the water supply in the water supply pipe can mix with the water flowing out of the water tank through the third interface and then flow out through the outlet pipe.

[0020] In a preferred embodiment, the circulation pipeline is further provided with a pump.

[0021] In a preferred embodiment, the phase change tank is located above the water tank.

[0022] In a preferred embodiment, the heat exchanger and the water tank can be connected in parallel through the circulation pipeline to supply water. When the electric water heater is in the second state, part of the water supply in the water supply pipeline can flow directly or through the temperature control device into the heat exchanger and / or the water tank.

[0023] In a preferred embodiment, the circulation pipeline includes a first circulation pipeline and a second circulation pipeline. The first circulation pipeline has a first inlet end and a first outlet end, with the first inlet end located in the water tank and the first outlet end located in the phase change tank. The second circulation pipeline has a second inlet end and a second outlet end, with the second inlet end located in the phase change tank and the second outlet end located in the water tank. The temperature regulating device is disposed on the first circulation pipeline or the second circulation pipeline.

[0024] In a preferred embodiment, the first water inlet is located at the upper part of the water tank, the first water outlet is located at the upper part of the phase change tank, the second water inlet is located at the lower part of the phase change tank, and the second water outlet is located at the lower part of the water tank.

[0025] In a preferred embodiment, the temperature regulating device is disposed on the second circulation pipeline, and the other side of the water supply pipeline is directly or through the temperature regulating device connected to the second circulation pipeline. When the electric water heater is in the second state, and the other side of the water supply pipeline is connected to the second circulation pipeline through the temperature regulating device, the water supply in the water supply pipeline is diverted by the temperature regulating device, with a portion of the water flowing into the heat exchanger and the water tank through the second circulation pipeline, and the water flowing out of the heat exchanger and the water tank flowing out again through the first circulation pipeline. The remaining portion of the water supply can mix with the water flowing out of the heat exchanger and the water tank. Alternatively, when the electric water heater is in the second state, and the other side of the water supply pipeline is directly connected to the second circulation pipeline, a portion of the water supply in the water supply pipeline flows into the heat exchanger and the water tank through the second circulation pipeline. Water flowing from the heat exchanger and the water tank flows into the temperature regulating device through the first circulation pipe, and another portion of the water supply in the water supply pipe flows directly into the temperature regulating device; or, when the electric water heater is in the second state, and the other side of the water supply pipe is connected to the second circulation pipe through the temperature regulating device, the water supply in the water supply pipe is diverted by the temperature regulating device and flows into the heat exchanger and the water tank through the second circulation pipe, and the water flowing out of the heat exchanger and the water tank mixes after flowing out of the first circulation pipe; or, when the electric water heater is in the second state, and the other side of the water supply pipe is directly connected to the second circulation pipe, the water supply in the water supply pipe flows into the heat exchanger and the water tank through the second circulation pipe, and the water flowing out of the heat exchanger and the water tank enters the temperature regulating device through the first circulation pipe and mixes.

[0026] In a preferred embodiment, when the water supply in the water supply pipeline flows only into the heat exchanger and the water tank, the temperature regulating device includes at least a first interface, a second interface, and a third interface, the second interface and the third interface being connected to the second circulation pipeline; the electric water heater is in a first state, and along the water flow direction, the third interface and the second interface are sequentially connected, allowing water in the water tank to circulate between the water tank and the heat exchanger; the electric water heater is in a second state, and the first interface is connected to the second interface and the third interface; or, when a portion of the water supply in the water supply pipeline flows into the heat exchanger and the water tank... When the water supply in the water supply pipeline is used to mix with the water flowing out of the heat exchanger and the water tank, the temperature control device includes at least a first interface, a second interface, a third interface, and a sixth interface. The second interface and the third interface are connected to the second circulation pipeline. When the electric water heater is in a first state, the third interface and the second interface are sequentially connected along the water flow direction, and the water in the water tank can circulate between the water tank and the heat exchanger. When the electric water heater is in a second state, the first interface can be connected to the second interface and the third interface, and the first interface can be connected to the sixth interface.

[0027] In a preferred embodiment, when the electric water heater is in the first state, the third interface and the second interface are sequentially connected along the water flow direction, and the first interface is structurally connected to the second interface and / or the third interface, but not connected in the water path.

[0028] In a preferred embodiment, the temperature regulating device includes a valve body and a valve core disposed within the valve body. The first interface, the second interface, the third interface, and the sixth interface are all disposed on the valve body. When the electric water heater is in the first state and the second state, the first interface is connected to the second interface and the third interface. When the electric water heater is in the first state, the valve core controls the opening degree of the second interface and the third interface to be equal. When the water heater switches from the first state to the second state, the valve core can adjust the opening degree of the second interface, the third interface, and / or the sixth interface.

[0029] In a preferred embodiment, the electric water heater further includes a water outlet pipe, one end of which is connected to the circulation pipe or the temperature control device, and the other end of which is used to connect to a water terminal.

[0030] In a preferred embodiment, when the electric water heater is in the first state, the third interface is located upstream of the second interface along the water flow direction, and the water in the circulation pipe flows from the third interface to the second interface; when the electric water heater is in the second state, the first interface is connected to the second interface, the third interface, and the sixth interface; when the temperature regulating device is used for diversion, the water flowing in from the first interface is diverted to the second interface, the third interface, and the sixth interface.

[0031] In a preferred embodiment, the electric water heater further includes a fourth state, in which the first interface and the sixth interface are not connected, and the first interface can only be connected to the second interface and the third interface.

[0032] In a preferred embodiment, the temperature regulating device is disposed on the first circulation pipe, and the other side of the water supply pipe is directly or through the temperature regulating device connected to the first circulation pipe. When the electric water heater is in the second state, and the other side of the water supply pipe is connected to the first circulation pipe through the temperature regulating device, the water supply in the water supply pipe is diverted by the temperature regulating device, with part of the water flowing into the heat exchanger and the water tank through the first circulation pipe, and the water flowing out of the heat exchanger and the water tank flowing out through the second circulation pipe. The remaining water can mix with the water flowing out of the heat exchanger and the water tank. Alternatively, when the electric water heater is in the second state, and the other side of the water supply pipe is directly connected to the first circulation pipe, a portion of the water supply in the water supply pipe flows into the heat exchanger and the water tank through the first circulation pipe. Water flowing out of the heat exchanger and the water tank flows into the temperature regulating device through the second circulation pipe, and another part of the water supply in the water supply pipe flows directly into the temperature regulating device; or, when the electric water heater is in the second state, and the other side of the water supply pipe is connected to the first circulation pipe through the temperature regulating device, the water supply in the water supply pipe is diverted by the temperature regulating device and flows into the heat exchanger and the water tank through the first circulation pipe, and the water flowing out of the heat exchanger and the water tank flows out through the second circulation pipe and mixes; or, when the electric water heater is in the second state, and the other side of the water supply pipe is directly connected to the first circulation pipe, the water supply in the water supply pipe flows into the heat exchanger and the water tank through the first circulation pipe, and the water flowing out of the heat exchanger and the water tank enters the temperature regulating device through the second circulation pipe and mixes.

[0033] In a preferred embodiment, when the water supply in the water supply pipeline flows only into the heat exchanger and the water tank, the temperature regulating device includes at least a first interface, a second interface, and a third interface, the second interface and the third interface being connected to the first circulation pipeline; when the electric water heater is in a first state, the third interface and the second interface are sequentially connected along the water flow direction, allowing water in the water tank to circulate between the water tank and the heat exchanger; when the electric water heater is in a second state, the first interface is connected to the second interface and the third interface; or, when a portion of the water supply in the water supply pipeline flows into the heat exchanger... When the water supply in the water supply pipeline is used to mix with the water flowing out of the heat exchanger and the water tank, the temperature control device includes at least a first interface, a second interface, a third interface, and a sixth interface. The second interface and the third interface are connected to the first circulation pipeline. When the temperature control device is in a first state, the third interface and the second interface are sequentially connected along the water flow direction, and the water in the water tank can circulate between the water tank and the heat exchanger. When the electric water heater is in a second state, the first interface is connected to the second and third interfaces, and the sixth interface is connected to the first interface.

[0034] In a preferred embodiment, when the electric water heater is in the first state, the third interface and the second interface are sequentially connected along the water flow direction, and the first interface is structurally connected to the second interface and / or the third interface, but not connected in the water path.

[0035] In a preferred embodiment, the temperature regulating device includes a valve body and a valve core disposed within the valve body. The first interface, the second interface, the third interface, and the sixth interface are all disposed on the valve body. When the electric water heater is in the first state and the second state, the first interface is connected to both the second interface and the third interface. When the electric water heater is in the first state, the valve core controls the opening degree of the second interface and the third interface to be equal. When the water heater switches from the first state to the second state, the valve core can adjust the opening degree of the second interface, the third interface, and / or the sixth interface.

[0036] In a preferred embodiment, the electric water heater further includes a water outlet pipe, one end of which is connected to the circulation pipe or the temperature control device, and the other end of which is used to connect to a water terminal.

[0037] In a preferred embodiment, a heating element is provided in the middle or lower part of the water tank; the phase change tank is located above the water tank; the temperature regulating device is detachably installed on the phase change tank; the circulation pipeline includes a first circulation pipeline and a second circulation pipeline, one end of the first circulation pipeline is connected to the water tank, and the other end is connected to the heat exchanger through the temperature regulating device; one end of the second circulation pipeline is connected to the heat exchanger, and the other end is connected to the water tank; the electric water heater also includes a water supply pipeline and a water outlet pipeline, one end of the water supply pipeline can be connected to a water source, and the other end is connected to the temperature regulating device; one end of the water outlet pipeline is connected to the temperature regulating device, and the other end is used to connect to a water terminal; the temperature regulating device, the circulation pipeline, the water supply pipeline, and the water outlet pipeline are combined to form a water circuit assembly; the electric water heater also includes a shell, and the water tank, the phase change tank, and at least part of the water circuit assembly are disposed in the shell.

[0038] In a preferred embodiment, both the phase change tank and the water tank extend horizontally, the phase change tank is shorter than the water tank, and one end of the phase change tank forms an installation space between the water tank and the end cap of the housing to accommodate the water circuit assembly.

[0039] In a preferred embodiment, the housing has opposing front and rear sides, the water circuit assembly is disposed near the rear side of the housing, and the electric water heater further includes a circuit board disposed near the front side of the housing.

[0040] In a preferred embodiment, the temperature control device is located above the rear side of the housing, and the inlet of the water supply pipe and the outlet of the water outlet pipe are located below the rear side of the housing.

[0041] In a preferred embodiment, the computer board is positioned above the front side of the housing.

[0042] In a preferred embodiment, the temperature control device includes a valve body, a valve core disposed within the valve body, and a motor for driving the valve core to move. The valve body includes a first interface, a second interface, a third interface, and a fourth interface. The first interface is used to connect to the water supply pipeline, the second interface is used to seal and connect to the phase change tank, the third interface is connected to the other end of the first circulation pipeline, and the fourth interface is connected to the water outlet pipeline.

[0043] In a preferred embodiment, the first interface, the third interface, and the fourth interface all face the end cap of the housing.

[0044] In a preferred embodiment, the second interface and the third interface are positioned closer to the valve core than the first interface and the second interface.

[0045] In a preferred embodiment, the motor is located at the top of the valve body.

[0046] In a preferred embodiment, at least one of the water supply pipeline, the water outlet pipeline, and the circulation pipeline is a flexible connecting pipe.

[0047] In a preferred embodiment, the flexible connecting pipe includes a PPR pipe and / or a metal corrugated pipe.

[0048] In a preferred embodiment, the connector of the flexible connecting tube is a metal part or a metal insert disposed on a plastic material.

[0049] In a preferred embodiment, the end of the phase change chamber is provided with a flow channel for connecting the temperature control device and the heat exchanger, the flow channel serving as part of the circulation pipeline.

[0050] In a preferred embodiment, the phase change chamber has a first end plate and a second end plate at opposite ends. The first end plate is located outside the second end plate, and the first end plate protrudes outward by a first predetermined dimension at a first predetermined position to form the drainage channel; or, the second end plate protrudes inward by a first predetermined dimension at a second predetermined position to form the drainage channel; or, the first end plate protrudes outward by a second predetermined dimension at a first predetermined position and the second end plate protrudes inward by a third predetermined dimension at a second predetermined position, with the first and second predetermined positions at least partially opposite each other to form the drainage channel; or, the phase change chamber further includes a third end plate located outside the first end plate. The third end plate protrudes outward by a first predetermined dimension at a first predetermined position to form the drainage channel; or, the phase change chamber further includes a fourth end plate located inside the second end plate, the fourth end plate protruding inward by a first predetermined dimension at the second predetermined position to form the drainage channel; or, the phase change chamber further includes a fifth end plate located inside the second end plate, the first end plate protruding outward by a fourth predetermined dimension at a first predetermined position, the fifth end plate protruding inward by a fifth predetermined dimension at a fifth predetermined position, and the second end plate forming an opening at a position corresponding to the first predetermined position and the fifth predetermined position, the first end plate, the second end plate, and the fifth end plate cooperating to form the drainage channel.

[0051] In a preferred embodiment, the drainage channel extends longitudinally along the height direction, the upper part of the drainage channel is connected to the water inlet of the heat exchanger, and the temperature regulating device is sealed and connected to the lower part of the drainage channel.

[0052] The technical solution of this utility model has the following significant beneficial effects:

[0053] The electric water heater provided in this application embodiment, by installing a temperature regulating device on the circulation pipeline, allows the circulation pipeline to be opened when heat storage of the phase change material in the phase change tank is required. Water in the tank circulates between the tank and the heat exchanger. Heated water in the tank flows into the phase change tank through the circulation pipeline and then returns to the tank, achieving circulation. During this circulation process, the hot water in the tank exchanges heat with the phase change material in the tank, improving the uniformity of heating the phase change material, increasing the heat exchange efficiency during the heat storage stage, shortening the heat storage time, reducing user waiting time, and enhancing the user experience.

[0054] When users need water, the temperature control device can be used to switch between storing heat in the electric water heater and supplying water to the user. The water circuit design is ingenious and the pipe structure is simple.

[0055] When supplying water to users, the temperature control device can be used in conjunction with the water supply pipeline and the circulation pipeline to form a predetermined water outlet pattern (such as series water outlet, parallel water outlet or single tank water supply). The temperature control device installed in the circulation pipeline can control the flow path and flow ratio of the water in the electric water heater, so that the electric water heater can output water with a temperature that meets the user's set requirements.

[0056] In this embodiment, a clever design of the circulation pipeline equipped with a temperature-regulating device enables multi-functional reuse at different stages. For example, when the water heater is in its first state, the circulation pipeline can serve as a connecting pipeline linking the water tank and the phase-change tank; when the water heater is in its second state, the circulation pipeline with the temperature-regulating device can cooperate with the water supply pipeline to output water at the user's set temperature to the water terminal. Through this ingenious design of the water circuit, while meeting the functional requirements at different stages, it also effectively reduces manufacturing costs, shrinks the size, and reliably meets the user's need for constant-temperature water use.

[0057] 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. Within the spirit and scope of the appended claims, embodiments of the present invention include many changes, modifications, and equivalents. 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. Attached Figure Description

[0058] 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 illustrative 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.

[0059] Figure 1 This is a schematic diagram of water flow in the first state of the first type of electric water heater provided in the embodiments of this application;

[0060] Figure 2 This is a schematic diagram of water flow in the second state of the first type of electric water heater provided in the embodiments of this application;

[0061] Figure 3 This is a schematic diagram of water flow in the first state of the second type of electric water heater provided in the embodiments of this application;

[0062] Figure 4 This is a schematic diagram of water flow in the second state of the second type of electric water heater provided in the embodiments of this application;

[0063] Figure 5 This is a schematic diagram of water flow in the first state of the third type of electric water heater provided in the embodiments of this application;

[0064] Figure 6 This is a schematic diagram of water flow in the second state of the third type of electric water heater provided in the embodiments of this application;

[0065] Figure 7 This is a schematic diagram of water flow in the third state of the third type of electric water heater provided in the embodiments of this application;

[0066] Figure 8 This is a schematic diagram of the water flow in the first state of the fourth type of electric water heater provided in the embodiments of this application;

[0067] Figure 9This is a schematic diagram of water flow in the second state of the fourth type of electric water heater provided in the embodiments of this application;

[0068] Figure 10 This is a schematic diagram of the water flow in the first state of the fifth type of electric water heater provided in the embodiments of this application;

[0069] Figure 11 This is a schematic diagram of the water flow in the second state of the fifth type of electric water heater provided in the embodiments of this application;

[0070] Figure 12 This is a schematic diagram of the water flow in the first state of the sixth type of electric water heater provided in the embodiments of this application;

[0071] Figure 13 This is a schematic diagram of the water flow in the second state of the sixth type of electric water heater provided in the embodiments of this application;

[0072] Figure 14 This is a schematic diagram of the structure of an electric water heater provided in the embodiments of this application;

[0073] Figure 15 for Figure 14 A side view of an electric water heater;

[0074] Figure 16 for Figure 15 Sectional view at point AA;

[0075] Figure 17 This is a side view of a phase change tank of an electric water heater provided in an embodiment of this application;

[0076] Figure 18 This is one of the schematic diagrams showing the two end plates of the phase change tank of an electric water heater forming a flow channel in an embodiment of this application;

[0077] Figure 19 This is a second schematic diagram of the drainage channel of a phase change tank in an electric water heater provided in the embodiments of this application;

[0078] Figure 20 This is the third schematic diagram of the drainage channel of the phase change tank of an electric water heater provided in the embodiments of this application;

[0079] Figure 21 This is the fourth schematic diagram of the drainage channel of the phase change tank of an electric water heater provided in the embodiments of this application;

[0080] Figure 22 This is the fifth schematic diagram of the drainage channel of the phase change tank of an electric water heater provided in the embodiments of this application;

[0081] Figure 23This is the sixth schematic diagram of the drainage channel of the phase change tank of an electric water heater provided in the embodiments of this application.

[0082] Reference numerals in the figures of this application:

[0083] 1. Phase change cylinder;

[0084] 10. Drainage channel;

[0085] 11. First end plate;

[0086] 12. Second end plate;

[0087] 13. Third end plate;

[0088] 14. Fourth end plate;

[0089] 15. Fifth end plate;

[0090] 2. Water tank;

[0091] 3. Heating element;

[0092] 41. First circulation pipeline;

[0093] 411. First water inlet end;

[0094] 412. First water outlet;

[0095] 42. Second circulation pipeline;

[0096] 421. Second water inlet;

[0097] 422. Second water outlet;

[0098] 5. Heat exchanger;

[0099] 6. Pump;

[0100] 7. Outer casing;

[0101] 81. Water supply pipelines;

[0102] 82. Water outlet pipe;

[0103] 9. Temperature control device;

[0104] 90. Valve body;

[0105] 91. First interface;

[0106] 92. Second Interface

[0107] 93. Third interface;

[0108] 94. Fourth interface;

[0109] 95. Fifth Interface

[0110] 96. Sixth Interface;

[0111] X, horizontal direction;

[0112] Y, the height direction. Detailed Implementation

[0113] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate this utility model and are not intended to limit the scope of this utility model. After reading this utility model, any modifications of this utility model in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0114] 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 "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0115] 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 application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0116] This utility model provides an electric water heater with optimized and simplified structure. Through a reasonable and ingenious water circuit design, it can not only ensure efficient energy storage, but also output water at the user's water terminal with a temperature that meets the user's set requirements.

[0117] Please refer to the following for comprehensive information. Figures 1 to 16This application specification provides an electric water heater, which may include: a water tank 2 and a phase change tank 1. The phase change tank 1 contains a phase change material for heat storage and release, and the phase change tank 1 also includes a heat exchanger 5. The electric water heater further includes a water supply pipe 81, a circulation pipe, and a temperature regulating device 9. The circulation pipe connects the water tank 2 and the heat exchanger 5. One side of the water supply pipe 81 can be connected to a water source. The temperature regulating device 9 is disposed on the circulation pipe. The other side of the water supply pipe 81 is directly connected to the circulation pipe and / or the heat exchanger 5 and / or the water tank 2, or connected to the circulation pipe and / or the heat exchanger 5 and / or the water tank 2 through the temperature regulating device 9. The electric water heater includes a first state and a second state. When the electric water heater is in the first state, the temperature regulating device 9 is used to open the circulation pipe. Water in water tank 2 can circulate between water tank 2 and heat exchanger 5. When the electric water heater is in the second state, under the control of the temperature regulating device 9, the water supply in the water supply pipe 81 can be diverted by the temperature regulating device 9. Part of the water supply flows into the heat exchanger 5 and / or water tank 2, and the other part of the water supply mixes with the water flowing out of the heat exchanger 5 and / or water tank 2. Alternatively, under the control of the temperature regulating device 9, part of the water supply in the water supply pipe 81 flows into the heat exchanger 5 and / or water tank 2, and the water flowing out of the heat exchanger 5 and / or water tank 2 flows into the temperature regulating device 9. Another part of the water supply in the water supply pipe 81 flows directly into the temperature regulating device 9. Or, under the control of the temperature regulating device 9, part of the water supply flows into the heat exchanger 5, and the other part flows into the water tank 2. The water flowing out of the heat exchanger 5 mixes with the water flowing out of the water tank 2.

[0118] In this embodiment, the electric water heater may include a phase change tank 1, a water tank 2, a water supply pipe 81, a circulation pipe, and a temperature control device 9, etc.

[0119] The phase change chamber 1 contains a phase change material for heat storage and release. The phase change material's physical state can change, thereby switching between its heat storage and heat release states. The specific material of the phase change material can be inorganic water and salt with added nucleating agents, or it can be in other forms, such as water; this application does not impose specific limitations. In the embodiments of this application, taking a phase change material capable of switching between solid and liquid states as an example, when the phase change material changes from solid to liquid, it is in a heat storage state, absorbing and storing external heat; when the phase change material changes from liquid to solid, it is in a heat release state, releasing the stored heat.

[0120] The phase change tank 1 can be equipped with a heat exchanger 5. Cold water flowing through the heat exchanger 5 can absorb heat from the phase change material, achieving preheating; hot water flowing through the heat exchanger 5 can release heat to the phase change material, achieving heat storage of the phase change material. Specifically, the heat exchanger 5 can be in the form of a heat exchange tube, which can extend downwards in the vertical direction Y and reciprocate in the left-right direction. Alternatively, the heat exchanger 5 can also take other forms; in this embodiment and accompanying drawings, the heat exchanger 5 is mainly illustrated using a heat exchange tube as an example. Of course, in some embodiments, the phase change material inside the phase change tank 1 can be encapsulated, in which case the heat exchanger 5 may not be required. In this embodiment, the example mainly illustrates the form where a heat exchanger 5 is installed inside the phase change tank 1.

[0121] The water tank 2 has a water storage cavity inside. Generally, the volume of the water tank 2 is at least a predetermined volume (e.g., 10 liters or more). When the volume of the water tank 2 is 10 liters or more, it can reliably provide the heat required for heat storage to the phase change material in the phase change tank 1, ensuring that the phase change material can store heat efficiently. In addition, when the volume of the water tank 2 is large, water can be supplied to the water terminal at a relatively stable water temperature using the water tank 2. Of course, the possibility of a small-capacity water tank 2 is not excluded in this application. In some special cases (e.g., scenarios with limited installation space), the volume of the water tank 2 may be less than 10L.

[0122] In some embodiments, the water tank 2 and the phase change tank 1 can be arranged vertically. For example, the water tank 2 can be located above or below the phase change tank 1. The phase change tank 1 and the water tank 2 can be installed horizontally, with their axes extending along the horizontal direction X. In this case, the axes of the phase change tank 1 and the water tank 2 can be arranged vertically. Of course, in the embodiments of this application, vertical installation of the water tank 2 and the phase change tank 1 is also possible. If the water tank 2 and the phase change tank 1 are installed vertically, their axes extend along the vertical direction Y. In this case, the axes of the phase change tank 1 and the water tank 2 can be arranged horizontally. Alternatively, the relative positional relationship and structure of the water tank 2 and the phase change tank 1 can also take other forms, which are not specifically limited here.

[0123] The electric water heater further includes a heating element 3, which can be used to heat the water in the water tank 2. The heating element 3 can be an electric heating element, such as a heating rod. Of course, the heating element 3 can also take other forms; in this embodiment, a heating rod is mainly used as an example. The heating rod can be installed inside the water tank 2, or it can be located outside the water tank 2, such as on the outer surface of the water tank 2, or it can be installed in the circulation pipe, etc. In the embodiments and accompanying drawings of this application, the heating element 3 is mainly illustrated as a heating rod installed inside the water tank 2. When the heating element 3 is installed inside the water tank 2, it can not only be used to heat the water in the water tank 2, but also to heat the water in the circulation pipe, providing heat to the water in the circulation pipe for use in the phase change material.

[0124] The phase change tank 1 may or may not contain a heating element 3. In the case where the phase change tank 1 does not contain a heating element 3, when the phase change material in the phase change tank 1 needs heat storage, it can absorb the heat from the water heated by the heating element 3 in the water tank 2. In this embodiment, the example is provided where the water tank 2 contains a heating element 3 and the phase change tank 1 does not.

[0125] The electric water heater also includes a circulation pipe, one function of which is to connect the water tank 2 and the heat exchanger 5. When the heat exchanger 5 needs to exchange heat with the phase change material using the heated water in the water tank 2, i.e., when heat storage of the phase change material is required, the electric water heater can enter a first state. When the electric water heater is in the first state, the circulation pipe is opened through the temperature control device 9, allowing the heated hot water in the water tank 2 to flow into the heat exchanger 5. As the hot water flows through the heat exchanger 5, it releases heat to the phase change material in contact with the heat exchanger 5, thus achieving heat storage of the phase change material.

[0126] The electric water heater may also include a water supply pipe 81, one side of which can be connected to a water source, and the other side of which can be directly connected to any one of the heat exchanger 5, the circulation pipe, and the water tank 2. Alternatively, the other side of the water supply pipe 81 can be connected to any one of the heat exchanger 5, the circulation pipe, and the water tank 2 through a temperature regulating device 9.

[0127] A temperature regulating device 9 is installed on the circulation pipeline. This device can be used to control the connection status of the circulation pipeline; and the temperature regulating device 9 installed in the circulation pipeline can control the flow pattern and flow ratio of water in the electric water heater. Specifically, the specific function of the temperature regulating device 9 can vary depending on its installation location and the different states of the electric water heater.

[0128] In this embodiment, the electric water heater may include a first state and a second state. The first state may be a heat storage state where the electric water heater is not discharging water, and the second state may be a water supply state where the electric water heater is discharging water.

[0129] When the electric water heater is in a heat storage state, the temperature control device 9 can be used to open the circulation pipeline, so that the water in the water tank 2 can circulate between the water tank 2 and the heat exchanger 5, thereby enabling the hot water in the water tank 2 to store heat on the phase change material in the phase change tank 1 when it flows through the heat exchanger 5.

[0130] When the electric water heater is in the water supply state, the temperature regulating device 9 can be used for diversion. The water supply flowing into the water supply pipe 81 can first flow into the temperature regulating device 9 and be diverted according to a predetermined ratio. Alternatively, the temperature regulating device 9 can also be used for confluence. The hot water heated by the heat exchanger 5 and / or the water tank 2 and part of the water supply flowing into the water supply pipe 81 can be combined in the temperature regulating device 9 according to a predetermined ratio, thereby cooperating with the circulation pipe to achieve control of different flow patterns and flow ratios of water.

[0131] When the temperature control device 9 is used for diversion, the water supply flowing through the temperature control device 9 is relatively low, which is room temperature water. Therefore, it is beneficial to extend the service life of the temperature control device 9, reduce the heat resistance requirements of the components (especially electronic components) of the temperature control device 9, and also reduce the risk of scaling.

[0132] Specifically, when the temperature regulating device 9 is used to divert the water supply flowing into the water supply pipe 81, under the control of the temperature regulating device 9, part of the water supply flows into the heat exchanger 5 and / or the water tank 2, while the other part of the water supply mixes with the water flowing out of the heat exchanger 5 and / or the water tank 2. The specific location of this water inflow can vary depending on the different relationships constructed between the water tank 2 and the phase change tank 1 in the circulation pipe equipped with the temperature regulating device 9, such as series outlet, parallel outlet, or single-tank outlet.

[0133] When the temperature control device 9 is used to combine the water supply, under the control of the temperature control device 9, a portion of the water supply in the water supply pipe 81 flows into the heat exchanger 5 and / or the water tank 2, and the water flowing out of the heat exchanger 5 and / or the water tank 2 flows into the temperature control device 9. Another portion of the water supply in the water supply pipe 81 flows directly into the temperature control device 9. After the two portions of water flowing into the temperature control device 9 are mixed, the water temperature can reach or approach the target outlet water temperature set by the user, thereby providing the user with water that meets the set requirements.

[0134] In some embodiments, under the control of the temperature regulating device 9, a portion of the water supply flows into the heat exchanger 5, and another portion flows into the water tank 2, resulting in the mixing of water flowing out of the heat exchanger 5 and water flowing out of the water tank 2. In this case, the temperature regulating device 9 can be applied when the heat exchanger 5 and the water tank 2 are connected in parallel for water output and mixing, without the need for additional water supply to be separated for mixing. In this situation, the temperature regulating device 9 can be used to divert the water supply or to merge the outflowing water.

[0135] The electric water heater provided in this embodiment of the application, by installing a temperature regulating device 9 in the circulation pipeline, allows the circulation pipeline to be opened when heat storage of the phase change material in the phase change tank 1 is required. Water in the water tank 2 can circulate between the water tank 2 and the heat exchanger 5. The heated water in the water tank 2 can flow into the phase change tank 1 through the circulation pipeline and then return to the water tank 2, thus achieving circulation. During this circulation process, the hot water in the water tank 2 exchanges heat with the phase change material in the phase change tank 1, improving the uniformity of heating the phase change material, increasing the heat exchange efficiency during the heat storage stage, shortening the heat storage time, reducing user waiting time, and improving the user experience.

[0136] When users need water, the temperature control device 9 can be used to switch between storing heat in the electric water heater and supplying water to the user. The water circuit design is ingenious and the pipe structure is simple.

[0137] When supplying water to users, the temperature regulating device 9 can be used in conjunction with the water supply pipe 81 and the circulation pipe to form a predetermined water outlet pattern (e.g., series water outlet, parallel water outlet or single tank water supply). The temperature regulating device 9 installed in the circulation pipe can control the flow path and flow ratio of the water in the electric water heater, so that the electric water heater can output water with a temperature that meets the user's set requirements.

[0138] In this embodiment, a clever design of the circulation pipeline equipped with the temperature regulating device 9 enables multi-functional reuse at different stages. For example, when the electric water heater is in the first state, the circulation pipeline can serve as a connecting pipeline linking the water tank 2 and the phase change tank 1; when the electric water heater is in the second state, the circulation pipeline equipped with the temperature regulating device 9 can cooperate with the water supply pipeline 81 to output water at a temperature that meets the user's set requirements to the water terminal. Through the above-mentioned clever design of the water circuit, while meeting the functional requirements of different stages, it can also effectively reduce manufacturing costs, shrink the size, and meet the user's constant temperature water needs.

[0139] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0140] Please refer to the following: Figures 1 to 4In some embodiments, the heat exchanger 5 and the water tank 2 can be connected in series through the circulation pipeline to supply water. When the electric water heater is in the second state, part of the water supply in the water supply pipeline 81 can flow directly or through the temperature regulating device 9 into the heat exchanger 5 and the water tank 2 in sequence. Alternatively, part of the water supply in the water supply pipeline 81 can flow directly or through the temperature regulating device 9 into the water tank 2 and the heat exchanger 5 in sequence.

[0141] In this embodiment, the heat exchanger 5 and the water tank 2 can be connected in series via a circulation pipeline. Specifically, when the electric water heater is in the second state, if the temperature regulating device 9 is used to divert the water supply flowing into the water supply pipeline 81, then part of the water supply in the water supply pipeline 81 can first flow into the temperature regulating device 9. After being diverted by the temperature regulating device 9, part of the water supply flows sequentially into the heat exchanger 5 and the water tank 2, or sequentially into the water tank 2 and the heat exchanger 5; the other part of the water supply can be used as cold water for mixing to achieve the adjustment of the outlet water temperature.

[0142] When the electric water heater is in the second state, if the temperature control device 9 is used to collect the water flow, the water supply pipe 81 can be connected to the circulation pipe for diversion. Part of the water flowing into the water supply pipe 81 can flow directly into the heat exchanger 5 and the water tank 2 in sequence, or flow into the water tank 2 and the heat exchanger 5 in sequence. The hot water flowing out of the water tank 2 or the heat exchanger 5 can flow into the temperature control device 9. The other part of the water supply used for mixing can also flow into the temperature control device 9. The hot and cold water can be mixed in the temperature control device to adjust the outlet water temperature.

[0143] In this embodiment, the phase change tank 1 and the water tank 2 are connected through a circulation pipeline. During the start-up process of the heating element 3, no additional power source is required, and the water can circulate naturally in the circulation pipeline. This simplifies the system, reduces energy consumption, effectively controls the overall cost, and does not generate noise that disturbs the user.

[0144] In order to allow the heated hot water in water tank 2 to flow into phase change tank 1 by natural convection, a circulation pipeline is installed between phase change tank 1 and water tank 2.

[0145] Specifically, the circulation pipeline may include a first circulation pipeline 41 and a second circulation pipeline 42. The first circulation pipeline 41 has a first water inlet 411 and a first water outlet 412. The first water inlet 411 is located in the water tank 2, and the first water outlet 412 is located in the phase change tank 1. The second circulation pipeline 42 has a second water inlet 421 and a second water outlet 422. The second water inlet 421 is located in the phase change tank 1, and the second water outlet 422 is located in the water tank 2. The temperature regulating device 9 is disposed on the first circulation pipeline 41 or the second circulation pipeline 42.

[0146] The water tank 2 is connected to the phase change tank 1 through the first circulation pipe 41 and the second circulation pipe 42. Figure 1 As shown, when the heating element 3 is working, the hot water in the water tank 2 heated by the heating element 3 expands due to heat. The hot water with lower density flows upward and enters the phase change tank 1 through the first circulation pipe 41. The water with lower temperature and lower density in the phase change tank 1 returns to the water tank 2 through the second circulation pipe 42. In this way, the water flows in a circulation between the phase change tank 1 and the water tank 2.

[0147] During the aforementioned circulation process, the heat generated by energizing the heating element 3 can raise the water temperature in the water tank 2, and simultaneously raise the water temperature in the heat exchanger 5 of the phase change tank 1. The heat from the water in the heat exchanger 5 can be transferred through the shell of the heat exchanger 5 to the phase change material in contact with it, allowing the phase change material to absorb heat and store energy. To ensure that, during the heat storage phase, the hot water flowing from the water tank 2 into the heat exchanger 5 of the phase change tank 1 can return to the water tank 2 more efficiently along the circulation pipe without additional driving force, at least part of the heat exchanger 5 is arranged from top to bottom along the water flow direction in the height direction Y of the phase change tank 1. If the water flowing from the water tank 2 into the phase change tank 1 flows entirely from bottom to top along the height direction Y, due to the combined effects of internal pipe resistance of the heat exchanger 5, gravity, and a drop in water temperature, the hot water in the water tank 2 may flow upwards for a certain distance before its temperature drops and it stops flowing, making it difficult to return to the water tank 2 without external driving force.

[0148] Of course, in other embodiments of this application, it is not excluded that a driving device, such as a pump 6, is provided in the circulation pipeline to provide driving force for the water flow in the circulation pipeline.

[0149] In one embodiment, the first water inlet 411 is located at the upper part of the water tank 2, the first water outlet 412 is located at the upper part of the phase change tank 1, the second water inlet 421 is located at the lower part of the phase change tank 1, and the second water outlet 422 is located at the lower part of the water tank 2.

[0150] When the first inlet end 411 of the first circulation pipe 41 is located at the upper part of the water tank 2, the water that is preferentially heated at the upper part of the water tank 2 can enter the phase change tank 1 at a faster speed and with a shorter path, thereby achieving heat storage of the phase change material. This allows the phase change material in the phase change tank 1 to complete the heat storage process as soon as possible and shorten the heat storage time. In addition, since the water with a lower temperature flowing out of the phase change tank 1 flows into the lower part of the water tank 2 through the second outlet end 422, this setting can prevent the water with a lower temperature from disturbing the decreasing water temperature of the water tank 2 from top to bottom in the early stage of heat storage. It also helps to ensure that the water with a higher temperature can stably pass through the first circulation pipe 41 into the phase change tank 1 at the upper part, thereby achieving efficient heat storage of the phase change material in the phase change tank 1.

[0151] The first water outlet 412 is located at the upper part of the phase change tank 1, and the second water inlet 421 is located at the lower part of the phase change tank 1. This facilitates the hot water flowing into the phase change tank 1 through the first circulation pipe 41 to flow smoothly inside the heat exchanger 5 under the action of gravity. In other words, even without an external drive, the water flowing out of the water tank 2 can reliably flow through the phase change tank 1 to achieve circulation.

[0152] Of course, in the embodiments of this application, it is not excluded that the positions of the first water inlet 411, the first water outlet 412, the second water inlet 421 and the second water outlet 422 may be changed according to actual design requirements in other embodiments.

[0153] Please refer to the following: Figures 1 to 2 In the first embodiment, the temperature regulating device 9 is installed on the first circulation pipe 41, and the other side of the water supply pipe 81 is directly or through the temperature regulating device 9 connected to the first circulation pipe 41. When the electric water heater is in the second state, after the water supply in the water supply pipe 81 is diverted by the temperature regulating device 9, part of the water supply flows into the heat exchanger 5, the water flowing out of the heat exchanger 5 enters the water tank 2 through the second circulation pipe 42, the water flowing out of the water tank 2 flows out through the first circulation pipe 41, and the other part of the water supply can mix with the water flowing out of the water tank 2; or, part of the water supply in the water supply pipe 81 flows into the heat exchanger 5, the water flowing out of the heat exchanger 5 enters the water tank 2 through the second circulation pipe 42, the water flowing out of the water tank 2 flows into the temperature regulating device 9 through the first circulation pipe 41, and the other part of the water supply in the water supply pipe 81 flows directly into the temperature regulating device 9.

[0154] In this embodiment, the temperature regulating device 9 can be installed on the first circulation pipe 41, and the other side of the water supply pipe 81 can be connected to the first circulation pipe 41 through the temperature regulating device 9; specifically, the other side of the water supply pipe 81 can be connected to the temperature regulating device 9. Alternatively, the other side of the water supply pipe 81 can be directly connected to the first circulation pipe 41; specifically, the other side of the water supply pipe 81 can be connected to the first circulation pipe 41.

[0155] Taking the temperature control device 9 as an example for diversion, the other side of the water supply pipe 81 can be connected to the temperature control device 9. For example... Figure 2 As shown, when the electric water heater needs to supply water externally, the external water source is connected to the water supply pipe 81. The water in the water supply pipe 81 flows into the temperature regulating device 9. After being diverted by the temperature regulating device 9, part of the water flows into the heat exchanger 5. The water flowing out of the heat exchanger 5 enters the water tank 2 through the second circulation pipe 42. The water flowing out of the water tank 2 flows out through the first circulation pipe 41. The remaining part of the water can mix with the water flowing out of the water tank 2 to form water with a temperature that meets the user's set requirements, which is then supplied to the water terminal.

[0156] It should be noted that the electric water heater is also equipped with detection devices, such as temperature and flow rate sensors. Multiple temperature sensors may be included; one sensor can detect the temperature of the cold water flowing into the water supply pipe 81, another can detect the temperature of the water exiting the water tank 2, and yet another can detect the temperature of the mixed water. When the temperature of the mixed water differs from the user-set temperature, the temperature regulating device 9 can be adjusted to bring the temperature of the mixed water closer to the user-set temperature.

[0157] Taking the temperature regulating device 9 as an example, when the electric water heater needs to supply water externally, the external water source is connected to the water supply pipe 81. Part of the water supply in the water supply pipe 81 flows into the heat exchanger 5. The water flowing out of the heat exchanger 5 enters the water tank 2 through the second circulation pipe 42. The water flowing out of the water tank 2 flows into the temperature regulating device 9 through the first circulation pipe 41. The other part of the water supply in the water supply pipe 81 flows directly into the temperature regulating device 9. The two parts of water are mixed in the temperature regulating device 9 to form water with a temperature that meets the user's set requirements, which is then supplied to the water terminal.

[0158] Please refer to the following: Figures 3 to 4In the second embodiment, the temperature regulating device 9 is installed on the second circulation pipe 42. When the electric water heater is in the second state, the water supply in the water supply pipe 81 is diverted by the temperature regulating device 9. Part of the water supply flows into the water tank 2, and the water flowing out of the water tank 2 enters the heat exchanger 5 through the first circulation pipe 41. The water flowing out of the heat exchanger 5 flows out through the second circulation pipe 42. The other part of the water supply can mix with the water flowing out of the heat exchanger 5. Alternatively, part of the water supply in the water supply pipe 81 flows into the water tank 2, the water flowing out of the water tank 2 enters the heat exchanger 5 through the first circulation pipe 41, the water flowing out of the heat exchanger 5 flows into the temperature regulating device 9 through the second circulation pipe 42, and the other part of the water supply in the water supply pipe 81 flows directly into the temperature regulating device 9.

[0159] In this embodiment, the temperature regulating device 9 can be installed on the second circulation pipe 42, and the other side of the water supply pipe 81 can be directly connected to the second circulation pipe 42; specifically, the other side of the water supply pipe 81 can be connected to the second circulation pipe 42. Alternatively, the other side of the water supply pipe 81 can be connected to the second circulation pipe 42 through the temperature regulating device 9; specifically, the other side of the water supply pipe 81 can be connected to the temperature regulating device 9.

[0160] Taking the temperature control device 9 as an example for diversion, the other side of the water supply pipe 81 can be connected to the temperature control device 9. For example... Figure 4 As shown, when the electric water heater needs to supply water externally, the external water source is connected to the water supply pipeline 81. After the water supply in the water supply pipeline 81 is diverted by the temperature regulating device 9, part of the water supply flows into the water tank 2. The water flowing out of the water tank 2 enters the heat exchanger 5 through the first circulation pipeline 41. The water flowing out of the heat exchanger 5 flows out through the second circulation pipeline 42. The other part of the water supply can mix with the water flowing out of the heat exchanger 5 to form water with a temperature that meets the user's set requirements, which is then supplied to the water terminal.

[0161] Taking the temperature regulating device 9 as an example, when the electric water heater needs to supply water externally, the external water source is connected to the water supply pipe 81. Part of the water supply in the water supply pipe 81 flows into the water tank 2. The water flowing out of the water tank 2 enters the heat exchanger 5 through the first circulation pipe 41. The water flowing out of the heat exchanger 5 flows into the temperature regulating device 9 through the second circulation pipe 42. The other part of the water supply in the water supply pipe 81 flows directly into the temperature regulating device 9. The two parts of water are mixed in the temperature regulating device 9 to form water with a temperature that meets the user's set requirements, which is then supplied to the water terminal.

[0162] In this embodiment, the temperature regulating device 9 can be in the form of a temperature regulating valve, or it can be a combination of multiple valves, etc. The specific form of the temperature regulating device 9 is not limited to the above description. Those skilled in the art may make other modifications based on the technical essence of this application, but as long as the function and effect achieved are the same as or similar to those of this application, they should be covered within the protection scope of this application. In the embodiments of this application, the temperature regulating device 9 is mainly illustrated as a temperature regulating valve.

[0163] In one embodiment, the temperature regulating device 9 includes at least a first interface 91, a second interface 92, and a third interface 93. The first interface 91 is used to connect to the other side of the water supply pipe 81. The second interface 92 and the third interface 93 are both connected to the first circulation pipe 41, or the second interface 92 and the third interface 93 are both connected to the second circulation pipe 42. When the electric water heater is in the first state, along the water flow direction, the third interface 93 and the second interface 92 are sequentially connected, and the water in the water tank 2 can circulate between the water tank 2 and the heat exchanger 5. When the electric water heater is in the second state, the first interface 91 can be connected to the second interface 92 and the third interface 93.

[0164] In this embodiment, the temperature regulating device 9 may include multiple interfaces. Specifically, the number of interfaces of the temperature regulating device 9 can be adaptively increased or decreased according to the actual water circuit connection needs. For example, the temperature regulating device 9 may include a first interface 91, a second interface 92, and a third interface 93. Taking the temperature regulating device 9 for diversion as an example, the first interface 91 can be connected to the other side of the water supply pipe 81, and the first interface 91 can be used as the water inlet of the temperature regulating device 9; the second interface 92 and the third interface 93 can be connected to the circulation pipe, and different functions can be implemented when the electric water heater is in different states.

[0165] Specifically, when the electric water heater is in the first state, such as Figure 1 or Figure 3 As shown, along the water flow direction, the third interface 93 and the second interface 92 are sequentially connected, allowing water in the water tank 2 to circulate between the water tank 2 and the heat exchanger 5. When the electric water heater is in the second state, the first interface 91 is connected to the second interface 92 and the third interface 93, allowing water flowing from the first interface 91 to flow into the second interface 92 and the third interface 93. Water entering the third interface 93 can flow into the water tank 2 or the phase change tank 1, while water entering the second interface 92 can be used as cold water for mixing.

[0166] In one embodiment, when the electric water heater is in the first state, the third interface 93 and the second interface 92 are sequentially connected along the water flow direction, and the first interface 91 is structurally connected to the second interface 92 and / or the third interface 93, but not connected in the water path.

[0167] In this embodiment, when the electric water heater is in the first state, the circulation pipe is connected through the third interface 93 and the second interface 92. The water heated by the heating element 3 in the water tank 2 can flow into the phase change tank 1 through the first circulation pipe 41. After storing heat in the phase change material in the phase change tank 1, it can flow into the water tank 2 through the second circulation pipe 42. During the start-up process of the heating element 3, the water tank 2 and the phase change tank 1 are connected through the circulation pipe, forming a relatively closed pressure vessel. When the first interface 91 is structurally connected to at least one of the second interface 92 and the third interface 93, if the pressure in the closed pressure vessel formed by the circulation pipe of the water tank 2 and the phase change tank 1 is too high, the pressure can be released through the connection structure formed by the first interface 91 and the second interface 92 and / or the third interface 93. That is, the pressure can be released outward through the second interface 92 and / or the third interface 93 and the first interface 91, thereby ensuring the safety of the electric water heater during use.

[0168] The electric water heater is also equipped with a pressure relief valve. The first interface 91 of the temperature control device 9 can be connected to the pressure relief valve. When pressure relief is required, the pressure in the pressure-bearing container formed by the water tank 2 and the phase change tank 1 connected by the circulation pipeline can be released through the pressure relief valve after passing through the temperature control device 9.

[0169] Furthermore, when the electric water heater is in the first state, the first interface 91 is structurally connected to the second interface 92 and / or the third interface 93, but not connected in the water circuit. When the electric water heater switches from the first state to the second state, that is, when the electric water heater switches from the state of heat storage to the state of water use, the time when the first interface 91 is structurally connected to the second interface 92 and / or the third interface 93 can be reduced, the adjustment speed is faster, and thus the user's waiting time for water can be reduced.

[0170] The fact that the first interface 91 is not connected to the second interface 92 and / or the third interface 93 in the water circuit mainly means that when the electric water heater is in the first state, there is no water flow from the first interface 91 to the second interface 92 and / or no water flow from the first interface 91 to the third interface 93.

[0171] In one specific embodiment, the temperature regulating device 9 includes a valve body 90 and a valve core disposed within the valve body 90. The first interface 91, the second interface 92, and the third interface 93 are all disposed on the valve body 90. When the electric water heater is in the first state and the second state, the first interface 91 is connected to the second interface 92 and the third interface 93. When the electric water heater is in the first state, the valve core controls the opening degree of the second interface 92 and the third interface 93 to be equal. When the water heater switches from the first state to the second state, the valve core can adjust the opening degree of the second interface 92 and the third interface 93.

[0172] In this embodiment, taking the valve body 90 as an example, which is provided with a first interface 91, a second interface 92, and a third interface 93, the first interface 91 is always connected to the second interface 92 and the third interface 93. Thus, when the electric water heater is in the first state, pressure relief channels can be formed between the second interface 92 and the third interface 93 and the first interface 91. When the internal pressure of the water tank 2 / heat exchanger 5 is too high, pressure can be released to the outside through these pressure relief channels.

[0173] Furthermore, when the electric water heater is in the first state, the opening of the second interface 92 and the third interface 93 can be equal. This setting can minimize the flow resistance of the water flow channel formed between the second interface 92 and the third interface 93 and maximize the flow rate. This helps to ensure that the hot water in the water tank 2 can flow efficiently between the water tank 2 and the heat exchanger 5 through the circulation pipe, thereby improving the heat storage efficiency.

[0174] Furthermore, when the electric water heater is in the first state, the valve core controls the opening degree of the second interface 92 and the third interface 93 to be equal. When the water heater switches from the first state to the second state, the valve core adjusts the opening degree of the second interface 92 and the third interface 93 with the opening degree of the second interface 92 and the third interface 93 being equal as the initial adjustment position. The temperature control device 9 can respond quickly, and the valve core only needs to make a small adjustment (e.g., rotate a small angle) to efficiently output water to the water terminal that meets the user's set temperature requirements.

[0175] It should be further explained that when the electric water heater is in the second state, the flow diversion of the temperature control device 9 can dynamically change according to the change in the hot water volume of the electric water heater. As the user's water consumption increases, for example, when the hot water output of the water heater reaches a certain level, the water temperature flowing out of the water tank 2 or heat exchanger 5 is close to the user's set outlet water temperature. At this time, it is no longer necessary to divert some cold water for mixing. Accordingly, all the water supply in the water heater can be supplied to the heat exchanger 5 or water tank 2 through the temperature control device 9. Specifically, at this time, the first interface 91 can be connected only to the second interface 92.

[0176] Alternatively, under certain special conditions, such as when the ambient temperature is high, the water supply temperature is high, and the user-set outlet water temperature is close to the water supply temperature, the water supplied by the water supply pipe 81 can be output to the water terminal through the temperature control device 9. In this case, the first interface 91 can be connected only to the third interface 93.

[0177] In this embodiment, the electric water heater may further include a water outlet pipe 82, one end of which is connected to the circulation pipe or the temperature control device 9, and the other end of which is connected to a water terminal. When the electric water heater is in the second state, the water flowing out from the circulation pipe or the temperature control device 9 flows to the water terminal through the water outlet pipe 82.

[0178] In this embodiment, one end of the water outlet pipe 82 is connected to the circulation pipe or the temperature control device 9. The entire water outlet pipe is located outside the water tank 2. This design eliminates the need for a separate opening in the water tank 2 for installing the water outlet pipe 82, thereby improving the reliability of the water tank 2 during use, reducing the risk of leakage, and lowering manufacturing costs. Furthermore, connecting one end of the water outlet pipe 82 to the circulation pipe or the temperature control device 9 also facilitates the integration and multi-functional design of the circulation pipe. When the electric water heater supplies water externally, this part of the circulation pipe can also function as the water outlet pipe 82 to output water from the water tank 2 / phase change tank 1.

[0179] In one embodiment, when the electric water heater is in the first state, along the water flow direction, the third interface 93 is located upstream of the second interface 92, and the water in the circulation pipe flows from the third interface 93 to the second interface 92; the temperature regulating device 9 is used for diversion, when the electric water heater is in the second state, the first interface 91 is connected to the second interface 92 and the third interface 93, and the water flowing in from the first interface 91 is diverted to the second interface 92 and the third interface 93.

[0180] In this embodiment, taking the temperature regulating device 9, which includes a first interface 91, a second interface 92, and a third interface 93, as an example, when the electric water heater is in the first state, the third interface 93 and the second interface 92 cooperate to connect the circulation pipe. The third interface 93 can be located upstream of the second interface 92. When water flows in the circulation pipe, taking the temperature regulating device 9 located in the first circulation pipe 41 as an example, the hot water in the water tank 2 flows into the first circulation pipe 41 through the first inlet 411. While flowing through the first circulation pipe 41, it sequentially flows through the third interface 93 and the second interface 92, and then flows into the phase change tank 1 through the first outlet 412. Subsequently, the water in the phase change tank 1 returns to the water tank 2 through the second circulation pipe 42.

[0181] like Figure 2 As shown, taking the temperature control device 9 for diversion as an example, when the electric water heater is in the second state, the water supplied by the external water source flows into the first interface 91 of the temperature control device 9 through the water supply pipe 81, and then the temperature control device 9 diverts the water. Part of the water supply is diverted to the second interface 92 to displace the hot water in the electric water heater, and part of the water supply is diverted to the third interface 93 to mix with the displaced hot water to obtain mixed water with a temperature that meets the user's set requirements. This mixed water is then supplied to the water terminal through the water outlet pipe 82.

[0182] like Figure 14 As shown, in one specific embodiment, the temperature regulating device 9 further includes a fourth interface 94, which is used to connect to the water outlet pipe 82. When the electric water heater is in the second state, the water supply in the water supply pipe 81 can be diverted by the temperature regulating device 9. Part of the water supply flows into the heat exchanger 5 and / or the water tank 2, while the other part of the water supply mixes with the water flowing out of the heat exchanger 5 and / or the water tank 2 in the temperature regulating device 9 and flows to the water outlet pipe 82 through the fourth interface 94.

[0183] In this embodiment, the temperature control device 9 may further include a fourth interface 94, and one end of the water outlet pipe 82 is connected to the fourth interface 94. When the temperature control device 9 is integrated with the fourth interface 94, one end of the water outlet pipe 82 can be conveniently installed on the temperature control device 9 by means of a detachable connection, thereby improving the integration of the water circuit and simplifying the pipe connection.

[0184] In this process, the additional water supply (cold water) can be mixed with the water (hot water) flowing out from the heat exchanger 5 and / or the water tank 2 in the temperature control device 9, and then flow to the water outlet pipe 82 through the fourth interface 94. This enables real-time adjustment of the ratio of cold and hot water during the mixing process, reducing water temperature fluctuations caused by water pressure fluctuations, such as when other water terminals are turned on at the same time.

[0185] Please refer to the following: Figure 5 , Figure 6 and Figure 7 In the third embodiment, the temperature regulating device 9 may further include a fifth interface 95, the second interface 92 and the third interface 93 are connected to one of the first circulation pipe 41 and the second circulation pipe 42, and the fifth interface 95 is connected to the other of the first circulation pipe 41 and the second circulation pipe 42; the electric water heater also includes a third state, when the electric water heater is in the third state, the first interface 91 is connected to the fifth interface 95 and the third interface 93, a portion of the water supply in the water supply pipe 81 can flow into the water tank 2 through the fifth interface 95, and another portion of the water supply in the water supply pipe 81 can mix with the water flowing out of the water tank 2 through the third interface 93 and then flow out through the water outlet pipe 82.

[0186] In this embodiment, compared with the first or second embodiment described above, the temperature regulating device 9 may be further provided with a fifth interface 95, which can be connected to the circulation pipeline. Using the fifth interface 95, the temperature regulating device 9 can switch the electric water heater from large water supply to single tank water supply.

[0187] like Figure 5 As shown, taking the fifth interface 95 connected to the second circulation pipe 42 as an example, when the electric water heater is in the first state, the third interface 93 and the second interface 92 are connected, so the first circulation pipe 41 is connected. The hot water in the water tank 2 flows into the phase change tank 1 through the first circulation pipe 41, and the water in the phase change tank 1 returns to the water tank 2 through the second circulation pipe 42, thus realizing circulation.

[0188] like Figure 6 As shown, when the electric water heater is in the second state, the first interface 91 is connected to the second interface 92 and the third interface 93 respectively. The water supply portion flowing into the first interface 91 from the inlet pipe flows into the phase change tank 1 through the second interface 92 and part of the first circulation pipe 41. The water flowing out of the phase change tank 1 flows into the water tank 2 through the second circulation pipe 42. The water in the water tank 2 mixes with part of the water supply from the third interface 93 through part of the first circulation pipe 41, and then flows to the water terminal through the outlet pipe 82. At this time, since the phase change tank 1 and the water tank 2 are connected in series for water supply, they can provide the maximum water volume to the water terminal. The electric water heater is in a high-volume water supply state, which can meet the user's demand for large water volume.

[0189] like Figure 7As shown, when the electric water heater is in the third state, the first interface 91 is connected to the fifth interface 95 and the third interface 93. Part of the water supplied by the water supply pipe 81 flows into the fifth interface 95 through the first interface 91, and part flows into the third interface 93 through the first interface 91. The water flowing into the fifth interface 95 flows into the water tank 2 through the second circulation pipe 42. The water in the water tank 2 flows out through the first circulation pipe 41, mixes with the part of the water flowing out of the third interface 93, and then flows to the water terminal through the outlet pipe 82. At this time, by switching the connection relationship between the interfaces of the temperature control device 9, the system switches from a system with the phase change tank 1 and the water tank 2 connected in series to a system using only the water tank 2. When the electric water heater is in the third state, it can meet the user's needs for small water usage, especially for multiple intermittent small water usages, avoiding frequent heat storage of the phase change material and affecting its service life.

[0190] In some embodiments of this application, the phase change tank 1 may be located above the water tank 2.

[0191] In this embodiment, the phase change tank 1 and the water tank 2 are connected through a circulation pipeline. During the start-up of the heating element 3, no additional power source is required, allowing for natural circulation of water within the pipeline. This simplifies the system, reduces energy consumption, effectively controls overall costs, and eliminates noise disturbance to the user. Of course, in other embodiments, it is not excluded that the phase change tank 1 and the water tank 2 may be arranged side-by-side, or that the phase change tank 1 may be positioned below the water tank 2.

[0192] Please see Figures 8 to 13 In some embodiments, the heat exchanger 5 and the water tank 2 can be connected in parallel to supply water through the circulation pipeline. When the electric water heater is in the second state, part of the water supply in the water supply pipeline 81 can flow directly or through the temperature regulating device 9 into the heat exchanger 5 and / or the water tank 2.

[0193] In this embodiment, the heat exchanger 5 and the water tank 2 can be connected in parallel via a circulation pipe. Specifically, when the electric water heater is in the second state, the temperature regulating device 9 can divert the water supply flowing into the water supply pipe 81. At this time, part of the water supply in the water supply pipe 81 can first flow into the temperature regulating device 9, and after being diverted by the temperature regulating device 9, part of it flows into the heat exchanger 5 and the water tank 2, while the remaining part of the water supply can be used as cold water for mixing, thereby adjusting the outlet water temperature. Alternatively, the temperature regulating device 9 can divert the water supply in the water supply pipe 81, supplying part to the heat exchanger 5 and part to the water tank 2.

[0194] Alternatively, when the electric water heater is in the second state, if the temperature regulating device 9 is used to combine the outlet water, the water supply pipe 81 can be connected to the circulation pipe for diversion. A portion of the water flowing into the water supply pipe 81 can directly flow into the heat exchanger 5 and the water tank 2, respectively. The hot water flowing out of the water tank 2 and the heat exchanger 5 can flow into the temperature regulating device 9. Another portion, used for mixing, can also flow into the temperature regulating device 9. Hot and cold water can be mixed in the regulating device to adjust the outlet water temperature. Alternatively, when no portion of the water supply is diverted for mixing, the water flowing into the water supply pipe 81 can directly flow into the heat exchanger 5 and the water tank 2, respectively. The hot water flowing out of the water tank 2 and the heat exchanger 5 can flow into the temperature regulating device 9 for mixing to adjust the outlet water temperature.

[0195] The circulation pipeline includes a first circulation pipeline 41 and a second circulation pipeline 42. The first circulation pipeline 41 has a first water inlet 411 and a first water outlet 412. The first water inlet 411 is located in the water tank 2, and the first water outlet 412 is located in the phase change tank 1. The second circulation pipeline 42 has a second water inlet 421 and a second water outlet 422. The second water inlet 421 is located in the phase change tank 1, and the second water outlet 422 is located in the water tank 2. The temperature regulating device 9 is installed on the first circulation pipeline 41 or the second circulation pipeline 42.

[0196] Furthermore, the first water inlet 411 is located at the upper part of the water tank 2, the first water outlet 412 is located at the upper part of the phase change tank 1, the second water inlet 421 is located at the lower part of the phase change tank 1, and the second water outlet 422 is located at the lower part of the water tank 2.

[0197] The specific configuration of the above-mentioned circulation pipeline and the resulting technical effects can be referred to the description of the series implementation method above, and will not be elaborated here.

[0198] Please refer to the following: Figures 8 to 11In some embodiments, the temperature regulating device 9 is installed on the second circulation pipe 42, and the other side of the water supply pipe 81 is directly or through the temperature regulating device 9 connected to the second circulation pipe 42. When the electric water heater is in the second state, and the other side of the water supply pipe 81 is connected to the second circulation pipe 42 through the temperature regulating device 9, the water supply in the water supply pipe 81 is diverted by the temperature regulating device 9, and part of the water supply flows into the heat exchanger 5 and the water tank 2 through the second circulation pipe 42. The water flowing out of the heat exchanger 5 and the water tank 2 then flows out through the first circulation pipe 41, and the remaining water can mix with the water flowing out of the heat exchanger 5 and the water tank 2. Alternatively, when the electric water heater is in the second state, and the other side of the water supply pipe 81 is directly connected to the second circulation pipe 42, a portion of the water supply in the water supply pipe 81 flows into the heat exchanger 5 and the water tank 2 through the second circulation pipe 42, and the remaining water can mix with the water flowing out of the heat exchanger 5 and the water tank 2. Water flowing out of the heat exchanger 5 and the water tank 2 flows into the temperature regulating device 9 through the first circulation pipe 41, and another part of the water supply in the water supply pipe 81 flows directly into the temperature regulating device 9; or, when the electric water heater is in the second state, when the other side of the water supply pipe 81 is connected to the second circulation pipe 42 through the temperature regulating device 9, the water supply in the water supply pipe 81 is diverted by the temperature regulating device 9 and flows into the heat exchanger 5 and the water tank 2 through the second circulation pipe 42, and the water flowing out of the heat exchanger 5 and the water tank 2 mixes after flowing out of the first circulation pipe 41; or, when the electric water heater is in the second state, when the other side of the water supply pipe 81 is directly connected to the second circulation pipe 42, the water supply in the water supply pipe 81 flows into the heat exchanger 5 and the water tank 2 through the second circulation pipe 42, and the water flowing out of the heat exchanger 5 and the water tank 2 enters the temperature regulating device 9 through the first circulation pipe 41 and mixes.

[0199] In this embodiment, the main difference between the parallel water outlet implementation and the series water outlet implementation described above is that when the electric water heater is in the second state, the water tank 2 and the phase change tank 1 in the water circuit are in parallel. The control principles of the two in other water circuit connections are similar. This parallel water outlet implementation can be adapted to refer to the series water outlet implementation described above.

[0200] The following will provide examples with reference to the accompanying drawings and embodiments.

[0201] Please refer to the following: Figure 8 and Figure 9In the fourth embodiment, when a portion of the water supplied in the water supply pipe 81 flows into the heat exchanger 5 and the water tank 2, and another portion of the water supplied in the water supply pipe 81 is used to mix with the water flowing out of the heat exchanger 5 and the water tank 2, the temperature regulating device 9 includes at least a first interface 91, a second interface 92, a third interface 93, and a sixth interface 96. The second interface 92 and the third interface 93 are connected to the second circulation pipe 42. When the electric water heater is in the first state, the third interface 93 and the second interface 92 are sequentially connected along the water flow direction, and the water in the water tank 2 can circulate between the water tank 2 and the heat exchanger 5. When the electric water heater is in the second state, the first interface 91 can be connected to the second interface 92 and the third interface 93, and the first interface 91 can be connected to the sixth interface 96.

[0202] Please refer to the following: Figure 10 and Figure 11 In the fifth embodiment, when the water supply in the water supply pipe 81 flows only into the heat exchanger 5 and the water tank 2, the temperature regulating device 9 includes at least a first interface 91, a second interface 92, and a third interface 93, the second interface 92 and the third interface 93 being connected to the second circulation pipe 42; when the electric water heater is in the first state, along the water flow direction, the third interface 93 and the second interface 92 are sequentially connected, and the water in the water tank 2 can circulate between the water tank 2 and the heat exchanger 5; when the electric water heater is in the second state, the first interface 91 can be connected to the second interface 92 and the third interface 93.

[0203] In this fifth embodiment, the main difference from the fourth embodiment is that the water supplied by the water supply pipeline 81 does not need to be separated into a separate line for mixing.

[0204] In both of the above embodiments, when the electric water heater is in the first state, the third interface 93 and the second interface 92 are sequentially connected along the water flow direction. The first interface 91 is structurally connected to the second interface 92 and / or the third interface 93, but they are not connected in the water path.

[0205] The connection relationship of the interface in the specific temperature control device 9 under different states and the corresponding technical effects can be referred to the specific description of the series water outlet implementation method, and will not be elaborated here.

[0206] Furthermore, the temperature control device 9 includes a valve body 90 and a valve core disposed within the valve body 90. The first interface 91, the second interface 92, the third interface 93, and the sixth interface 96 are all disposed on the valve body 90. When the electric water heater is in the first state and the second state, the first interface 91 is connected to the second interface 92 and the third interface 93. When the electric water heater is in the first state, the valve core controls the opening degree of the second interface 92 and the third interface 93 to be equal. When the water heater switches from the first state to the second state, the valve core can adjust the opening degree of the second interface 92, the third interface 93, and / or the opening degree of the sixth interface 96.

[0207] In the fourth embodiment, the valve body 90 of the temperature regulating device 9 is provided with a first interface 91, a second interface 92, a third interface 93, and a sixth interface 96. Taking the temperature regulating device 9 as a diversion device as an example, the first interface 91 is used to connect to the water inlet pipe, serving as the water inlet. The second interface 92 and the third interface 93 are used to connect to the water tank 2 and the heat exchanger 5, respectively, and the sixth interface 96 serves as the diversion port.

[0208] In the fifth embodiment, the valve body 90 of the temperature regulating device 9 may be provided with a first interface 91, a second interface 92, and a third interface 93. Taking the temperature regulating device 9 as an example of flow diversion, the first interface 91 is used to connect to the inlet pipe, serving as the water inlet. The second interface 92 and the third interface 93 are used to connect to the water tank 2 and the heat exchanger 5, respectively.

[0209] Whether the electric water heater is in the first state or the second state, the first interface 91 is always connected to the second interface 92 and the third interface 93. In this way, when the electric water heater is in the first state, the second interface 92 and the third interface 93 can form a pressure relief channel with the first interface 91. When the internal pressure of the water tank 2 / heat exchanger 5 is too high, the pressure can be released to the outside through the pressure relief channel.

[0210] Furthermore, when the electric water heater is in the first state, the opening of the second interface 92 and the third interface 93 can be equal. This setting can minimize the flow resistance of the water flow channel formed between the second interface 92 and the third interface 93 and maximize the flow rate. This helps to ensure that the hot water in the water tank 2 can flow efficiently between the water tank 2 and the heat exchanger 5 through the circulation pipe, thereby improving the heat storage efficiency.

[0211] Furthermore, when the electric water heater is in the first state, the valve core controls the opening degree of the second interface 92 and the third interface 93 to be equal. When the water heater switches from the first state to the second state, the valve core adjusts the opening degree of the second interface 92 and the third interface 93 with the opening degree of the second interface 92 and the third interface 93 being equal as the initial adjustment position. The temperature control device 9 can respond quickly, and the valve core only needs to make a small adjustment (e.g., rotate a small angle) to efficiently output water to the water terminal that meets the user's set temperature requirements.

[0212] Furthermore, when the water heater switches from the first state to the second state, in the fifth embodiment, the valve core can adjust the opening degree of the second interface 92 and the third interface 93; in the fourth embodiment, the valve core can adjust the opening degree of the second interface 92, the third interface 93 and / or the sixth interface 96, thereby realizing the adjustment of the outlet water temperature.

[0213] In one embodiment, the electric water heater further includes a water outlet pipe 82, one end of which is connected to the circulation pipe or the temperature control device 9, and the other end of which is used to connect to a water terminal.

[0214] In this embodiment, the electric water heater may further include a water outlet pipe 82, one end of which is connected to the circulation pipe or the temperature control device 9, and the other end of which is connected to a water terminal. When the electric water heater is in the second state, the water flowing out from the circulation pipe or the temperature control device 9 flows to the water terminal through the water outlet pipe 82.

[0215] In this embodiment, one end of the water outlet pipe 82 is connected to the circulation pipe or the temperature control device 9. The entire water outlet pipe is located outside the water tank 2. This design eliminates the need for a separate opening in the water tank 2 for installing the water outlet pipe 82, thereby improving the reliability of the water tank 2 during use, reducing the risk of leakage, and lowering manufacturing costs. Furthermore, connecting one end of the water outlet pipe 82 to the circulation pipe or the temperature control device 9 also facilitates the integration and multi-functional design of the circulation pipe. When the electric water heater supplies water externally, this part of the circulation pipe can also function as the water outlet pipe 82 to output water from the water tank 2 / phase change tank 1.

[0216] like Figure 8 As shown, when the electric water heater is in the first state, along the water flow direction, the third interface 93 is located upstream of the second interface 92, and the water in the circulation pipe flows from the third interface 93 to the second interface 92; as Figure 9As shown, when the electric water heater is in the second state, the first interface 91 is connected to the second interface 92, the third interface 93 and the sixth interface 96; when the temperature regulating device 9 is used for diversion, the water flowing in from the first interface 91 is diverted to the second interface 92, the third interface 93 and the sixth interface 96.

[0217] Furthermore, in the fourth embodiment described above, the electric water heater may also include a fourth state. When the electric water heater is in the fourth state, the first interface 91 and the sixth interface 96 are not connected, and the first interface 91 can only be connected to the second interface 92 and the third interface 93.

[0218] For the electric water heater in this application embodiment, the water supply status can be adjusted by switching the connection relationship of the temperature control device 9 interface, thereby maximizing the utilization of the hot water in the electric water heater.

[0219] For example, when there is still sufficient hot water in the electric water heater during the initial stage of water use, the first interface 91 can be connected to the second interface 92, the third interface 93, and the sixth interface 96. A portion of the water supply from the water supply pipe 81 flows into the sixth interface 96 for mixing. When the amount of hot water in the electric water heater drops to a certain level, the first interface 91 can be connected to the second interface 92 and the third interface 93, and disconnected from the sixth interface 96. At this time, all the water supply from the water supply pipe 81 flows into the water tank 2 and the heat exchanger 5, so that the water flowing out of the electric water heater can still meet the user's set temperature requirements. This maximizes the utilization of the hot water in the electric water heater and meets the user's demand for large amounts of hot water.

[0220] Please refer to the following: Figure 12 and Figure 13In some embodiments, the temperature regulating device 9 is installed on the first circulation pipe 41, and the other side of the water supply pipe 81 is directly or through the temperature regulating device 9 connected to the first circulation pipe 41. When the electric water heater is in the second state, and the other side of the water supply pipe 81 is connected to the first circulation pipe 41 through the temperature regulating device 9, the water supply in the water supply pipe 81 is diverted by the temperature regulating device 9, and part of the water supply flows into the heat exchanger 5 and the water tank 2 through the first circulation pipe 41. The water flowing out of the heat exchanger 5 and the water tank 2 then flows out through the second circulation pipe 42, and the remaining water can mix with the water flowing out of the heat exchanger 5 and the water tank 2. Alternatively, when the electric water heater is in the second state, and the other side of the water supply pipe 81 is directly connected to the first circulation pipe 41, a portion of the water supply in the water supply pipe 81 flows into the heat exchanger 5 and the water tank 2 through the first circulation pipe 41, and the remaining water can mix with the water flowing out of the heat exchanger 5 and the water tank 2. Water flowing out of the heat exchanger 5 and the water tank 2 flows into the temperature regulating device 9 through the second circulation pipe 42, and another part of the water supply in the water supply pipe 81 flows directly into the temperature regulating device 9; or, when the electric water heater is in the second state, and the other side of the water supply pipe 81 is connected to the first circulation pipe 41 through the temperature regulating device 9, the water supply in the water supply pipe 81 is diverted by the temperature regulating device 9 and flows into the heat exchanger 5 and the water tank 2 through the first circulation pipe 41, and the water flowing out of the heat exchanger 5 and the water tank 2 mixes after flowing out through the second circulation pipe 42; or, when the electric water heater is in the second state, and the other side of the water supply pipe 81 is directly connected to the first circulation pipe 41, the water supply in the water supply pipe 81 flows into the heat exchanger 5 and the water tank 2 through the first circulation pipe 41, and the water flowing out of the heat exchanger 5 and the water tank 2 enters the temperature regulating device 9 through the second circulation pipe 42 and mixes.

[0221] The main difference between the above-described parallel water outlet implementation method and the fourth and fifth implementation methods is that the temperature control device 9 is located in a different position. In this implementation method, the temperature control device 9 is located in the first circulation pipeline 41.

[0222] like Figure 12 and Figure 13 As shown, in the sixth embodiment, the temperature control device 9 is used for water collection when the electric water heater supplies water to the outside.

[0223] When a portion of the water supplied in the water supply pipe 81 flows into the heat exchanger 5 and the water tank 2, and another portion of the water supplied in the water supply pipe 81 is used to mix with the water flowing out of the heat exchanger 5 and the water tank 2, the temperature regulating device 9 includes at least a first interface 91, a second interface 92, a third interface 93, and a sixth interface 96. The second interface 92 and the third interface 93 are connected to the first circulation pipe 41. When the temperature regulating device 9 is in a first state, the third interface 93 and the second interface 92 are sequentially connected along the water flow direction, and the water in the water tank 2 can circulate between the water tank 2 and the heat exchanger 5. When the electric water heater is in a second state, the first interface 91 is connected to the second interface 92 and the third interface 93, and the sixth interface 96 can be connected to the first interface 91.

[0224] In this embodiment, the other side of the water supply pipe 81 can be connected to the second circulation pipe 42, and the other side of the water supply pipe 81 can be connected to the sixth interface 96. The water flowing in from the other side of the water supply pipe 81 flows into the water tank 2 through the second circulation pipe 42, flows into the heat exchanger 5 of the phase change tank 1 through the second circulation pipe 42, and flows into the temperature control device 9 through the sixth interface 96.

[0225] Water in water tank 2 flows into the second port 92 of temperature regulating device 9 through the first circulation pipe 41. Water in heat exchanger 5 flows into the third port 93 of temperature regulating device 9 through the first circulation pipe 41. The water flowing into the second port 92, the third port 93, and the sixth port 96 mix in the temperature regulating device 9 to obtain water with a temperature that meets the user's set requirements, and is then output through the first port 91. In this embodiment, the first port 91 can be used as the outlet for the mixed water in the temperature regulating device 9.

[0226] Alternatively, when the temperature control device 9 does not have the sixth interface 96, or when the hot water volume decreases in the later stages of water use, the water supply in the water supply pipe 81 only flows into the heat exchanger 5 and the water tank 2. When the water supply in the water supply pipe 81 only flows into the heat exchanger 5 and the water tank 2, the temperature control device 9 includes at least a first interface 91, a second interface 92, and a third interface 93, the second interface 92 and the third interface 93 being connected to the first circulation pipe 41; the electric water heater is in the first state, and along the water flow direction, the third interface 93 and the second interface 92 are sequentially connected, allowing the water in the water tank 2 to circulate between the water tank 2 and the heat exchanger 5; the electric water heater is in the second state, and the first interface 91 is connected to the second interface 92 and the third interface 93.

[0227] In this embodiment, when the electric water heater is in the first state, the third interface 93 and the second interface 92 are sequentially connected along the water flow direction. The first interface 91 is structurally connected to the second interface 92 and / or the third interface 93, but they are not connected in the water path.

[0228] Furthermore, the temperature control device 9 includes a valve body 90 and a valve core disposed within the valve body 90. The first interface 91, the second interface 92, the third interface 93, and the sixth interface 96 are all disposed on the valve body 90. When the electric water heater is in the first state and the second state, the first interface 91 is connected to the second interface 92 and the third interface 93. When the electric water heater is in the first state, the valve core controls the opening degree of the second interface 92 and the third interface 93 to be equal. When the water heater switches from the first state to the second state, the valve core can adjust the opening degree of the second interface 92, the third interface 93, and / or the opening degree of the sixth interface 96.

[0229] The specific configuration of the temperature control device 9, the connection relationship between the various interfaces under different states, and the corresponding technical effects can be referred to the descriptions of the fourth and fifth embodiments above, and will not be repeated here.

[0230] In addition, the electric water heater may also include a water outlet pipe 82, one end of which is connected to the circulation pipe or the temperature control device 9, and the other end of which is used to connect to the water terminal.

[0231] Among them, such as Figure 12 or Figure 13 As shown, one end of the water outlet pipe 82 can be connected to the temperature control device 9. The connection of the water outlet pipe 82 and the corresponding technical effects can be referred to the specific description in the above embodiments, and will not be repeated here.

[0232] Please refer to the following: Figure 14 , Figure 15 , Figure 16In some embodiments, a heating element 3 is provided in the middle or lower part of the water tank 2; the phase change tank 1 is located above the water tank 2; the temperature regulating device 9 is detachably installed on the phase change tank 1; the circulation pipeline includes a first circulation pipeline 41 and a second circulation pipeline 42, one end of the first circulation pipeline 41 is connected to the water tank 2, and the other end is connected to the heat exchanger 5 through the temperature regulating device 9; one end of the second circulation pipeline 42 is connected to the heat exchanger 5, and the other end is connected to the water tank 2; The electric water heater also includes a water supply pipe 81 and a water outlet pipe 82. One end of the water supply pipe 81 can be connected to a water source, and the other end is connected to the temperature control device 9. One end of the water outlet pipe 82 is connected to the temperature control device 9, and the other end is used to connect to a water terminal. The temperature control device 9, the circulation pipe, the water supply pipe 81, and the water outlet pipe 82 are combined to form a water circuit assembly. The electric water heater also includes a housing 7, and the water tank 2, the phase change tank 1, and at least part of the water circuit assembly are disposed in the housing 7.

[0233] In this embodiment, the specific composition and functions of the water tank 2, phase change tank 1, temperature control device 9, circulation pipeline, water supply pipeline 81 and water outlet pipeline 82 can be referred to the specific description of the above embodiment, and will not be repeated here.

[0234] In this embodiment, the temperature control valve is detachably mounted on the phase change tank 1. When the temperature control valve is detachably mounted on the phase change tank 1, it firstly improves the ease of installation and maintenance; secondly, it eliminates the need for a section of the circulation pipe connecting the phase change tank 1 and the temperature control valve, facilitating installation within limited space; it also shortens the water path between the temperature control valve and the phase change tank 1, reducing water resistance and ensuring reliable water flow during the heat storage phase; furthermore, different application scenarios have different performance requirements for electric water heaters, such as temperature adjustment range and response speed. When the temperature control valve is directly detachably mounted on the phase change tank 1, it can be replaced to adapt the electric water heater to different operating conditions without modifying other structures. Alternatively, when the temperature control valve is subsequently upgraded, it can be easily disassembled to upgrade the electric water heater.

[0235] When a heating element 3 is installed in the water tank 2, the heating element 3 can be located in the middle or lower part of the water tank 2. Taking the heating element 3 as a heating rod as an example, the number of heating rods can be one, two, or more. Among them, at least one heating rod is located at the bottom of the water tank 2.

[0236] When a heating element 3 is installed in the middle or lower part of the water tank 2, the temperature of the water in the entire tank can be raised to a higher temperature before circulation or water discharge. Especially for scenarios where the water tank 2 itself has a small volume, when the heating element 3 is installed at the bottom of the water tank 2, it can ensure that there is enough heat in the water tank 2 to provide to the phase change material during heat storage; and that there is enough hot water to provide to the user when using water.

[0237] The electric water heater also includes a housing 7, inside which the phase change tank 1 and the water tank 2 are installed.

[0238] Both the phase change tank 1 and the water tank 2 can extend along the horizontal direction X. The length of the phase change tank 1 is shorter than the length of the water tank 2. One end of the phase change tank 1 forms an installation space between the water tank 2 and the end cap of the outer casing 7 to accommodate the water circuit assembly.

[0239] At least some of the water circuit components can be installed using the aforementioned installation space. Specifically, the temperature control valve, as well as parts of the circulation pipe, inlet pipe, and outlet pipe, can be located within this installation space. Furthermore, the circuit board of the electric water heater can also be located within this installation space. By effectively utilizing the aforementioned installation space, the components can be rationally and compactly installed without increasing the volume of the outer casing 7, through efficient use of its internal space.

[0240] In one embodiment, the housing 7 has opposing front and rear sides, the water circuit assembly is disposed near the rear side of the housing 7, and the electric water heater also includes a circuit board disposed near the front side of the housing 7. Furthermore, the temperature control valve is disposed above the rear side of the housing 7, and the inlet of the water supply pipe and the outlet of the water outlet pipe are disposed below the rear side of the housing 7.

[0241] In this embodiment, an electric water heater is typically equipped with a computer board, which can be used to store the control program of the electric water heater and to be electrically connected to control components, such as temperature control valves, to control the normal operation of the electric water heater and realize various functions.

[0242] The outer casing 7 has a front side facing the user and a rear side relatively far from the user. The water circuit assembly and the computer board can be set in separate sections, so as to achieve water and electricity separation in space and prevent the computer board from being negatively affected by the failure of the water circuit assembly, such as leakage, and thus affecting the normal use of the computer board.

[0243] When the water circuit component and the computer board are arranged in separate sections, specifically, the water circuit component can be placed near the front of the housing 7, and the computer board can be placed near the rear of the housing 7; alternatively, the computer board can be placed near the front of the housing 7, and the water circuit component near the rear of the housing 7. Typically, the panel of the housing 7 has some control components and display components, etc. When the computer board is placed near the front of the housing 7, it helps to shorten the connection lines between the computer board and these components, and at the same time, the computer board will not intersect with the water circuit component, improving the reliability of the computer board during use. In the following embodiments, the description will be based on the premise that the computer board is placed near the front of the housing 7 and the water circuit component is placed near the rear of the housing 7.

[0244] Since the temperature control valve is detachably connected to the phase change tank 1, its height corresponds to that of the phase change tank 1. Specifically, the temperature control valve can be located on the upper part near the rear side of the housing 7, and the inlet and outlet of the water supply pipe are designed to extend downwards out of the housing 7, and can be positioned near the lower rear side of the housing 7. When the inlet and outlet of the water supply pipe are positioned near the lower rear side of the housing 7, an opening for the water supply and outlet pipes to pass through can be correspondingly provided at the bottom of the housing 7. During installation, the water supply and outlet pipes can pass through the opening at the bottom of the housing 7, which facilitates subsequent installation by connecting the water supply and outlet pipes to external pipes and minimizes spatial interference during installation.

[0245] Furthermore, the computer board is positioned above the front side of the outer casing 7. Since the installation space formed between the phase change tank 1, the water tank 2, and the outer casing 7 is located above, the computer board can be positioned above the front side of the outer casing 7. When the computer board is installed at a relatively high position, the negative interference caused to the computer board in the event of malfunctions such as water leakage inside the electric water heater can be minimized.

[0246] In one embodiment, the temperature control valve includes a valve body 90, a valve core disposed within the valve body 90, and a motor for driving the valve core to move. The valve body 90 includes a first interface 91, a second interface 92, a third interface 93, and a fourth interface 94. The first interface 91 is used to connect to the water supply pipe, the second interface 92 is used to seal and connect to the phase change tank 1, the third interface 93 is connected to the other end of the first circulation pipe, and the fourth interface 94 is connected to the water outlet pipe.

[0247] In this embodiment, the temperature regulating valve is specifically an electric temperature regulating valve, which mainly includes: a valve body 90, a valve core, and a motor. The valve body 90 may be provided with multiple interfaces for connecting to water circuits. For example, the valve body 90 may be provided with a first interface 91 for connecting to a water supply pipe, a second interface 92 for sealing connection to the phase change tank 1, a third interface 93 for connecting to a first circulation pipe, and a fourth interface 94 for connecting to an outlet pipe.

[0248] In order to ensure the reliability of the motor during use and to prevent water inside the valve body 90 from flowing into the motor, the motor can be located on top of the valve body 90.

[0249] The end face of the phase change chamber 1 is directly opposite the end cap of the outer casing 7. The temperature control valve can be located between the end face of the phase change chamber 1 and the end cap of the outer casing 7 in the horizontal direction X. Except for the second interface 92 used for sealing connection to the phase change chamber 1, the other interfaces, including the first interface 91, the third interface 93, and the fourth interface 94, all face the end cap of the outer casing 7. This arrangement facilitates the connection of the first interface 91, the third interface 93, and the fourth interface 94 to their corresponding pipes, and also facilitates the reasonable arrangement of the pipes connected to each interface within the aforementioned installation space.

[0250] In one embodiment, the second interface 92 and the third interface 93 are positioned closer to the valve core than the first interface 91 and the second interface 92.

[0251] In this embodiment, when the electric water heater is in a heat storage state, the third interface 93 and the second interface 92 are sequentially connected along the water flow direction. The hot water heated by the heating element 3 in the water tank 2 flows from the third interface 93 to the second interface 92 through the first circulation pipe, and then flows into the heat exchanger 5. The water in the heat exchanger 5 returns to the water tank 2 through the second circulation pipe. When the hot water flows through the temperature regulating valve, since the valve core is positioned higher than the second interface 92 and the third interface 93, when the second interface 92 and the third interface 93 are positioned close to the valve core, the flow path of the water in the valve body 90 can be shortened, the bending structure in the flow path can be minimized, the pipe resistance can be reduced, and the reliable operation of the self-heating convection circulation between the water tank 2 and the heat exchanger 5 can be ensured.

[0252] In one embodiment, at least one of the water supply pipe, the water outlet pipe, and the circulation pipe is a flexible connecting pipe.

[0253] In this embodiment, at least one of the water supply pipe, water outlet pipe, and circulation pipe can be a flexible connecting pipe. This gives the pipe better self-adjustment during assembly, which is beneficial for arranging the pipes in a limited space. During installation, the flexible pipe can be bent as needed to avoid interference with surrounding components and ensure accurate positioning at the connection / installation location. For example, when the water tank 2 and the phase change tank 1 are relatively fixed, installation errors may occur, causing the installation interfaces on the water tank 2 and the phase change tank 1 to differ depending on the installation conditions. When a flexible connecting pipe is used, its adaptability is better, and it can overcome the installation difficulties caused by the aforementioned installation errors.

[0254] When in use, the flexible connecting pipe can release the stress generated by thermal expansion and contraction through its own elastic deformation (expansion, contraction, bending), avoiding stress concentration at the interface or weak parts of the pipe, thereby extending the service life of the pipe and seals.

[0255] In addition, the flexible connecting tube is easy to disassemble and can be quickly separated without complicated tools. Furthermore, there is no need to recalibrate the tube routing when adjusting or replacing it, which significantly shortens maintenance time and reduces after-sales costs.

[0256] Overall, when flexible connecting pipes are used in the pipes of this electric water heater, the problems of layout and assembly tolerance in narrow spaces can be solved. In addition, the product performance can be optimized from multiple dimensions such as operational stability, lifespan, and ease of maintenance, taking into account both practicality and reliability.

[0257] Specifically, the flexible connecting pipe may include a PPR pipe and / or a metal corrugated pipe.

[0258] When the flexible connecting pipe includes PPR pipe (random copolymer polypropylene pipe), it has the following advantages: PPR pipe has high pressure resistance and can withstand high water pressure; it is hygienic and non-toxic, using food-grade raw materials, free of harmful chemicals, and meets drinking water hygiene standards, ensuring water safety and preventing harm to human health; it has good corrosion resistance and is not corroded by acids, alkalis, salts, or other chemicals. Furthermore, PPR pipe has strong anti-aging properties and a service life of over 50 years. The hot-melt connection method fuses the joint and pipe together, resulting in high connection strength and no risk of leakage. This connection method is not only convenient to construct but also ensures the safety and reliability of the piping system; it has a low thermal conductivity and good insulation performance. Using PPR pipe in hot and cold water piping systems can effectively reduce heat loss and save energy.

[0259] When the flexible connecting pipe includes a metal bellows, it has the following advantages:

[0260] With ultra-high flexibility and spatial adaptability: Metal corrugated pipes (especially stainless steel corrugated pipes) adopt a spiral corrugated structure, which can achieve multi-angle bending and small radius folding. They can flexibly navigate in extremely narrow spaces and easily avoid obstacles, making them especially suitable for installation space-constrained scenarios.

[0261] High temperature and high pressure resistance: The stainless steel material can withstand temperatures above 120℃ (far exceeding the water temperature of the water heater) and high water pressure. Even when the water heater is under high pressure, it will not bulge or crack due to pressure fluctuations. It has good structural strength and high safety.

[0262] Excellent impact resistance and aging resistance: The outer layer of the metal corrugated pipe is made of stainless steel, which has strong impact and compression resistance and can withstand minor bumps during installation or external friction during later use; and the metal material is not easily affected by ultraviolet rays and humidity, has excellent aging resistance, and a long service life. It is suitable as a connecting pipe for key nodes such as water heater interfaces and valves (which need to withstand frequent disassembly or vibration).

[0263] Flexible and highly compatible connection methods: The two ends of the metal corrugated pipe are mostly threaded (with rubber sealing rings), which can be directly adapted to the threaded ports of water heater interfaces, angle valves and other accessories. No special tools are required for installation / disassembly, which facilitates later maintenance (such as replacing water heaters and cleaning pipes); and the metal material is highly compatible with various valves and pipe fittings.

[0264] Furthermore, in some embodiments, PPR pipes and corrugated metal pipes can be used in combination in electric water heaters to combine the advantages of both and achieve synergistic effects. Of course, the specific form of the flexible connecting pipe can also be other types, and is not limited to the above description. Those skilled in the art, inspired by the technical essence of this application, may make other modifications, but as long as the functions and effects achieved are the same as or similar to those of this application, they should all be covered within the scope of protection of this application.

[0265] In one embodiment, the connector of the flexible connecting tube is a metal part or a metal insert disposed on a plastic material.

[0266] In this embodiment, considering that the main material of the flexible connecting pipe (such as PPR pipe) has low strength, if the force is concentrated during installation, it is easy to cause deformation and other phenomena, resulting in loosening of the connection.

[0267] To ensure the strength and reliability of the connection structure at the joint location, the joint can be made of metal or a metal insert can be provided.

[0268] Specifically, when the connector is made of metal, the high strength of the metal (such as copper or stainless steel) can directly withstand the tightening force during installation and the water pressure impact during long-term use, ensuring that the connector connection is always firm and avoiding connection failure due to insufficient material strength.

[0269] When a connector is made of plastic with a metal insert, the metal insert (such as a pre-embedded metal threaded sleeve) can transfer the stress concentration area to the metal component, while the plastic body only plays an auxiliary fixing role. This retains the lightweight advantage of plastic material and strengthens the key stress points through the metal insert, preventing the connector from being damaged under repeated disassembly or long-term stress.

[0270] In addition, when the joint of the flexible connecting pipe is a metal part or a metal insert set on plastic material, it can enhance the sealing of the connection position, reduce the risk of leakage, and improve the temperature resistance and aging resistance, so as to better ensure the long-term stable operation of the joint.

[0271] In one embodiment, the end of the phase change tank 1 is provided with a flow channel 10 for connecting the temperature control valve and the heat exchanger 5, and the flow channel 10 is used as part of the circulation pipe.

[0272] In this embodiment, the temperature control valve has a second interface 92, which is used for a sealed connection to the phase change chamber 1.

[0273] To ensure that the water flowing into the heat exchanger 5 can flow smoothly from top to bottom and finally flow out through the outlet of the heat exchanger 5 located at the bottom of the phase change tank 1, the inlet of the heat exchanger 5 is located at the top of the phase change tank 1.

[0274] For the temperature control valve, considering that components such as a motor are installed above the second port 92, if the second port 92 of the temperature control valve is directly inserted into the water inlet of the heat exchanger 5, the temperature control valve would exceed the highest position of the phase change tank 1 in the height direction Y, thus increasing the size of the entire outer casing 7. In order to ensure that the temperature control valve does not exceed the highest position of the phase change tank 1 in the height direction Y, the second port 92 is installed on the phase change tank 1 at a position lower than the water inlet of the heat exchanger 5.

[0275] To connect the second interface 92 to the inlet of the heat exchanger 5, in this embodiment, a drainage channel 10 is provided at the end of the phase change tank 1. Specifically, the drainage channel 10 extends longitudinally along the height direction Y. The upper part of the drainage channel 10 is connected to the inlet of the heat exchanger 5. For example, the upper part of the drainage channel 10 can directly cover the inlet of the heat exchanger 5. The second interface 92 of the temperature control valve can be sealed and connected to the lower part of the drainage channel 10.

[0276] Specifically, the second interface 92 can be inserted into the drainage channel 10 via a sealed plug-in connection. The drainage channel 10 can be used as part of the circulation pipe, integrated into the end of the phase change tank 1. This not only enables water circuit connectivity but also optimizes and simplifies the structure, shortens the length of the circulation pipe, reduces pipe resistance, and makes the structure more compact, which is beneficial for installation in limited space. In addition, the drainage channel 10 and the phase change tank 1 can be an integral structure, which can reduce the number of connection joints and avoid problems such as loose interfaces and aging seals when the phase change tank 1 is connected to the external circulation pipe, further improving the reliability of the electric water heater system's seal.

[0277] Please refer to the following: Figures 17 to 23 In one embodiment, the phase change chamber 1 has a first end plate 11 and a second end plate 12 facing each other at its end. The first end plate 11 is located outside the second end plate 12. The first end plate 11 protrudes outward by a first predetermined dimension at a first predetermined position to form the drainage channel 10; or, the second end plate 12 protrudes inward by a first predetermined dimension at a second predetermined position to form the drainage channel 10; or, the first end plate 11 protrudes outward by a second predetermined dimension at a first predetermined position and the second end plate 12 protrudes inward by a third predetermined dimension at a second predetermined position, with the first and second predetermined positions at least partially opposite each other to form the drainage channel 10; or, the phase change chamber 1 further includes a third end plate 13 located outside the first end plate 11. Plate 13 protrudes outward by a first predetermined dimension at a first predetermined position to form the drainage channel 10; or, the phase change chamber 1 further includes a fourth end plate 14, which is located inside the second end plate 12, and protrudes inward by a first predetermined dimension at the second predetermined position to form the drainage channel 10; or, the phase change chamber 1 further includes a fifth end plate 15 located inside the second end plate 12, where the first end plate 11 protrudes outward by a fourth predetermined dimension at a first predetermined position, and the fifth end plate 15 protrudes inward by a fifth predetermined dimension at a fifth predetermined position, and the second end plate 12 has an opening at a position corresponding to the first predetermined position and the fifth predetermined position, and the first end plate 11, the second end plate 12 and the fifth end plate 15 cooperate to form the drainage channel 10.

[0278] In this embodiment, the second end plate 12 serves as a main support plate, and is provided with multiple mounting holes for passing through heat exchange tubes. The first end plate 11 may be provided with a connecting portion for connecting two adjacent heat exchange tube sections.

[0279] The drainage channel 10 can be formed by using the first end plate 11 and / or the second end plate 12, or it can be added by adding it on the side of the first end plate 11 away from the second end plate 12, or by adding it on the side of the second end plate 12 away from the first end plate 11, etc.

[0280] like Figure 18 As shown, the drainage channel 10 can be formed by the first end plate 11 protruding outward by a first predetermined dimension at a first predetermined position. For the second end plate 12, since it serves as the main support plate, maintaining the structure of the second end plate 12 while providing an outward protrusion structure on the first end plate 11 helps ensure the stability of the phase change chamber 1 structure. Specifically, the outward protrusion structure can be formed on the first end plate 11 through heat treatment, such as stamping. Specifically, the first predetermined dimension can be the depth of the stamped outward protrusion structure, which can be approximately 10 mm, to ensure that the formed drainage channel 10 does not generate excessive pipe resistance when guiding fluid.

[0281] Or, such as Figure 21 As shown, a third end plate 13 is added to the outside of the first end plate 11, and the drainage channel 10 can be formed by the third end plate 13 protruding outward by a first predetermined size at a first predetermined position. In this embodiment, the drainage channel 10 is provided in a manner equivalent to the above embodiment, by adding an additional third end plate 13 to form the drainage channel 10. Since no stamping or other operations are performed on the first end plate 11 or the second end plate 12, it will not negatively affect the structural strength of the first end plate 11 and the second end plate 12.

[0282] like Figure 19 As shown, the drainage channel 10 can be formed by the second end plate 12 protruding inward by a first predetermined dimension at a second predetermined position. Here, the inward protrusion refers to the side away from the first end plate 11. The specific structure and forming method of the drainage channel 10 can be referred to the above embodiments, and will not be repeated here.

[0283] When the drainage channel 10 is disposed on the second end plate 12, compared with the one disposed on the first end plate 11, since the second end plate 12 does not have a connecting part, and the size of the connecting part on the first end plate 11 is larger than the mounting hole on the second end plate 12, the gap between two adjacent mounting holes is relatively large when the drainage channel 10 is disposed, so that the space that the drainage channel 10 can be arranged is relatively large.

[0284] Or, such as Figure 22As shown, a fourth end plate 14 is added to the inner side of the second end plate 12, and the drainage channel 10 can be formed by the fourth end plate 14 protruding inward by a first predetermined dimension at the second predetermined position. In this embodiment, the drainage channel 10 is provided in a manner equivalent to the above embodiment, by adding an additional fourth end plate 14 to form the drainage channel 10. Since no stamping or other operations are performed on the first end plate 11 or the second end plate 12, it will not negatively affect the structural strength of the first end plate 11 and the second end plate 12.

[0285] like Figure 20 As shown, the drainage channel 10 can be formed by the first end plate 11 protruding outward at a first predetermined position by a second predetermined dimension (depth dimension) and the second end plate 12 protruding inward at a second predetermined position by a third predetermined dimension (depth dimension), with the first predetermined position and the second predetermined position at least partially facing each other.

[0286] The second and third predetermined dimensions are smaller than the first predetermined dimension. Specifically, the second and third predetermined dimensions are approximately half the size of the first predetermined dimension. For example, when the first predetermined dimension is 10mm, the second and third predetermined dimensions can be approximately 5mm.

[0287] In terms of manufacturing process, taking stamping as an example, when the stamping depth is around 5mm, a groove of the corresponding depth can be achieved in a single stamping operation. When the stamping depth reaches around 10mm, it needs to be formed in two stages during stamping. Furthermore, to ensure the structural strength of the stamped end plate itself, the stamped end plate also needs to undergo annealing and other processes to eliminate thermal stress. Therefore, overall, the method of setting shallow protrusions on two end plates and then combining them is simpler to operate and more reliable in terms of manufacturing process.

[0288] Or, such as Figure 23 As shown, a fifth end plate 15 may be added to the inner side of the second end plate 12. The second end plate 12 has openings at positions corresponding to the first predetermined position and the fifth predetermined position. The drainage channel 10 can be formed by the first end plate 11 protruding outward by a fourth predetermined dimension at the first predetermined position, and the fifth end plate 15 protruding inward by a fifth predetermined dimension at the fifth predetermined position, with the first end plate 11, the second end plate 12, and the fifth end plate 15 cooperating to form the channel. The opening on the second end plate 12 at the first predetermined position can be a mounting hole on the second end plate 12.

[0289] In this embodiment, the method of forming the drainage channel 10 does not involve structural modification of the second end plate 12, which can reliably ensure the strength of the second end plate 12. At the same time, shallow grooves are formed on the corresponding protrusion positions on the first end plate 11 and the fifth end plate 15, which makes the manufacturing process simple and more reliable.

[0290] Of course, the specific arrangement of the drainage channel 10 can also be in other ways, and is not limited to the above description. Those skilled in the art may make other changes under the inspiration of the technical essence of this application, but as long as the function and effect achieved are the same as or similar to this application, they should be covered within the scope of protection of this application.

[0291] The various embodiments described in this specification are presented in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0292] The above are merely a few embodiments of this utility model. Although the embodiments disclosed in this utility model are as described above, the content is only for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any person skilled in the art to which this utility model pertains may make any modifications and changes in the form and details of the embodiments without departing from the spirit and scope disclosed in this utility model. However, the patent protection scope of this utility model shall still be determined by the scope defined in the appended claims.

Claims

1. An electric water heater, characterized in that, The electric water heater includes a water tank and a phase change tank. The phase change tank contains a phase change material for heat storage and heat release. The phase change tank also includes a heat exchanger. The electric water heater also includes a water supply pipe, a circulation pipe, and a temperature regulating device. The circulation pipe is used to connect the water tank and the heat exchanger. One side of the water supply pipe can be connected to a water source. The temperature regulating device is installed on the circulation pipe. The other side of the water supply pipe is directly connected to the circulation pipe and / or the heat exchanger and / or the water tank, or connected to the circulation pipe and / or the heat exchanger and / or the water tank through the temperature regulating device. The electric water heater includes a first state and a second state. When the electric water heater is in the first state, the temperature control device is used to open the circulation pipeline, and the water in the water tank can circulate between the water tank and the heat exchanger. When the electric water heater is in the second state Under the control of the temperature regulating device, the water supply in the water supply pipeline can be diverted by the temperature regulating device, with part of the water flowing into the heat exchanger and / or the water tank, and the other part of the water mixing with the water flowing out of the heat exchanger and / or the water tank. or, Under the control of the temperature regulating device, a portion of the water supplied in the water supply pipeline flows into the heat exchanger and / or the water tank, while water flowing out of the heat exchanger and / or the water tank flows into the temperature regulating device. The other portion of the water supplied in the water supply pipeline flows directly into the temperature regulating device. or, Under the control of the temperature regulating device, a portion of the water supply flows into the heat exchanger, and another portion flows into the water tank. The water flowing out of the heat exchanger and the water flowing out of the water tank are mixed together.

2. The electric water heater as described in claim 1, characterized in that, The heat exchanger and the water tank can be connected in series through the circulation pipeline to supply water. When the electric water heater is in the second state, part of the water supply in the water supply pipeline can flow directly or sequentially into the heat exchanger and the water tank through the temperature control device, or part of the water supply in the water supply pipeline can flow directly or sequentially into the water tank and the heat exchanger through the temperature control device.

3. The electric water heater as described in claim 2, characterized in that, The circulation pipeline includes a first circulation pipeline and a second circulation pipeline. The first circulation pipeline has a first water inlet and a first water outlet. The first water inlet is located in the water tank and the first water outlet is located in the phase change tank. The second circulation pipeline has a second water inlet and a second water outlet. The second water inlet is located in the phase change tank and the second water outlet is located in the water tank. The temperature control device is installed on the first circulation pipeline or the second circulation pipeline.

4. The electric water heater as described in claim 3, characterized in that, The first water inlet is located at the upper part of the water tank, the first water outlet is located at the upper part of the phase change tank, the second water inlet is located at the lower part of the phase change tank, and the second water outlet is located at the lower part of the water tank.

5. The electric water heater as described in claim 3, characterized in that, The temperature control device is installed on the first circulation pipeline, and the other side of the water supply pipeline is directly or through the temperature control device connected to the first circulation pipeline. When the electric water heater is in the second state The water supply in the water supply pipeline is diverted by the temperature regulating device. Part of the water flows into the heat exchanger, and the water flowing out of the heat exchanger enters the water tank through the second circulation pipeline. The water flowing out of the water tank flows out through the first circulation pipeline. The remaining water supply mixes with the water flowing out of the water tank; or... A portion of the water supplied in the water supply pipeline flows into the heat exchanger, the water flowing out of the heat exchanger enters the water tank through the second circulation pipeline, the water flowing out of the water tank flows into the temperature regulating device through the first circulation pipeline, and the other portion of the water supplied in the water supply pipeline flows directly into the temperature regulating device.

6. The electric water heater as described in claim 3, characterized in that, The temperature control device is installed on the second circulation pipeline. When the electric water heater is in the second state The water supply in the water supply pipeline is diverted by the temperature regulating device. Part of the water flows into the water tank, and the water flowing out of the water tank enters the heat exchanger through the first circulation pipeline. The water flowing out of the heat exchanger flows out through the second circulation pipeline. The remaining water supply mixes with the water flowing out of the heat exchanger; or... A portion of the water supplied in the water supply pipeline flows into the water tank, the water flowing out of the water tank enters the heat exchanger through the first circulation pipeline, the water flowing out of the heat exchanger flows into the temperature regulating device through the second circulation pipeline, and the other portion of the water supplied in the water supply pipeline flows directly into the temperature regulating device.

7. The electric water heater as described in claim 5 or 6, characterized in that, The temperature control device includes at least a first interface, a second interface, and a third interface. The first interface is used to connect to the other side of the water supply pipeline. The second interface and the third interface are both connected to the first circulation pipeline, or both the second interface and the third interface are connected to the second circulation pipeline. When the electric water heater is in the first state, the third interface and the second interface are connected in sequence along the water flow direction, and the water in the water tank can circulate between the water tank and the heat exchanger. When the electric water heater is in the second state, the first interface can be connected to the second interface and the third interface.

8. The electric water heater as described in claim 7, characterized in that, When the electric water heater is in the first state, the third interface and the second interface are sequentially connected along the water flow direction. The first interface and the second interface and / or the third interface are structurally connected, but not connected in the water path.

9. The electric water heater as described in claim 7, characterized in that, The temperature control device includes a valve body and a valve core disposed within the valve body. The first interface, the second interface, and the third interface are all disposed on the valve body. When the electric water heater is in the first state and the second state, the first interface is connected to the second interface and the third interface. When the electric water heater is in the first state, the valve core controls the opening degree of the second interface and the third interface to be equal; When the water heater switches from the first state to the second state, the valve core can adjust the opening degree of the second interface and the third interface.

10. The electric water heater as described in claim 7, characterized in that, The electric water heater also includes a water outlet pipe, one end of which is connected to the circulation pipe or the temperature control device, and the other end of which is used to connect to a water terminal.

11. The electric water heater as described in claim 10, characterized in that, When the electric water heater is in the first state, along the water flow direction, the third interface is located upstream of the second interface, and the water in the circulation pipe flows from the third interface to the second interface; The temperature control device is used for diversion. When the electric water heater is in the second state, the first interface is connected to the second interface and the third interface, and the water flowing in from the first interface is diverted to the second interface and the third interface.

12. The electric water heater as described in claim 11, characterized in that, The temperature control device also includes a fourth interface for connecting to the water outlet pipe. When the electric water heater is in the second state, the water supply in the water supply pipeline can be diverted by the temperature control device. Part of the water supply flows into the heat exchanger and / or the water tank, and the other part of the water supply mixes with the water flowing out of the heat exchanger and / or the water tank in the temperature control device and flows to the water outlet pipeline through the fourth interface.

13. The electric water heater as described in claim 10, characterized in that, The temperature control device further includes a fifth interface, wherein the second interface and the third interface are connected to one of the first circulation pipeline and the second circulation pipeline, and the fifth interface is connected to the other of the first circulation pipeline and the second circulation pipeline; The electric water heater also includes a third state, when the electric water heater is in the third state. The first interface is connected to the fifth and third interfaces. A portion of the water supply in the water supply pipeline can flow into the water tank through the fifth interface, while another portion of the water supply in the water supply pipeline can mix with the water flowing out of the water tank through the third interface and then flow out through the outlet pipeline.

14. The electric water heater as described in claim 1, characterized in that, The circulation pipeline is also equipped with a pump.

15. The electric water heater as described in claim 1, characterized in that, The phase change tank is located above the water tank.

16. The electric water heater as described in claim 1, characterized in that, The heat exchanger and the water tank can be connected in parallel through the circulation pipeline to supply water. When the electric water heater is in the second state, part of the water supply in the water supply pipeline can flow directly or through the temperature control device into the heat exchanger and / or the water tank.

17. The electric water heater as described in claim 16, characterized in that, The circulation pipeline includes a first circulation pipeline and a second circulation pipeline. The first circulation pipeline has a first water inlet and a first water outlet. The first water inlet is located in the water tank and the first water outlet is located in the phase change tank. The second circulation pipeline has a second water inlet and a second water outlet. The second water inlet is located in the phase change tank and the second water outlet is located in the water tank. The temperature control device is installed on the first circulation pipeline or the second circulation pipeline.

18. The electric water heater as described in claim 17, characterized in that, The first water inlet is located at the upper part of the water tank, the first water outlet is located at the upper part of the phase change tank, the second water inlet is located at the lower part of the phase change tank, and the second water outlet is located at the lower part of the water tank.

19. The electric water heater as described in claim 17, characterized in that, The temperature regulating device is installed on the second circulation pipeline, and the other side of the water supply pipeline is directly or through the temperature regulating device connected to the second circulation pipeline. When the electric water heater is in the second state, and the other side of the water supply pipe is connected to the second circulation pipe through the temperature regulating device, After the water supply in the water supply pipeline is diverted by the temperature control device, part of the water supply flows into the heat exchanger and the water tank through the second circulation pipeline. The water flowing out of the heat exchanger and the water tank then flows out through the first circulation pipeline. The other part of the water supply can mix with the water flowing out of the heat exchanger and the water tank. or, When the electric water heater is in the second state, and the other side of the water supply pipe is directly connected to the second circulation pipe, A portion of the water supplied in the water supply pipeline flows into the heat exchanger and the water tank through the second circulation pipeline, and the water flowing out of the heat exchanger and the water tank flows into the temperature regulating device through the first circulation pipeline. The other portion of the water supplied in the water supply pipeline flows directly into the temperature regulating device. or, When the electric water heater is in the second state, and the other side of the water supply pipe is connected to the second circulation pipe through the temperature regulating device... The water supplied in the water supply pipeline is diverted by the temperature control device and flows into the heat exchanger and the water tank through the second circulation pipeline. The water flowing out of the heat exchanger and the water tank is mixed after flowing out through the first circulation pipeline. or, When the electric water heater is in the second state, and the other side of the water supply pipe is directly connected to the second circulation pipe, Water supplied from the water supply pipeline flows into the heat exchanger and the water tank through the second circulation pipeline, and water flowing out of the heat exchanger and the water tank enters the temperature control device through the first circulation pipeline to mix.

20. The electric water heater as described in claim 19, characterized in that, When the water supply in the water supply pipeline flows only into the heat exchanger and the water tank, the temperature control device includes at least a first interface, a second interface and a third interface, and the second interface and the third interface are connected to the second circulation pipeline. When the electric water heater is in the first state, the third interface and the second interface are connected in sequence along the water flow direction, and the water in the water tank can circulate between the water tank and the heat exchanger. The electric water heater is in a second state, and the first interface can be connected to the second interface and the third interface; or, When a portion of the water supplied in the water supply pipeline flows into the heat exchanger and the water tank, and another portion of the water supplied in the water supply pipeline is used to mix with the water flowing out of the heat exchanger and the water tank... The temperature control device includes at least a first interface, a second interface, a third interface, and a sixth interface, wherein the second interface and the third interface are connected to the second circulation pipeline. When the electric water heater is in the first state, the third interface and the second interface are connected in sequence along the water flow direction, and the water in the water tank can circulate between the water tank and the heat exchanger. The electric water heater is in a second state, where the first interface can be connected to the second interface and the third interface, and the first interface can also be connected to the sixth interface.

21. The electric water heater as described in claim 20, characterized in that, When the electric water heater is in the first state, the third interface and the second interface are sequentially connected along the water flow direction. The first interface and the second interface and / or the third interface are structurally connected, but not connected in the water path.

22. The electric water heater as described in claim 20, characterized in that, The temperature control device includes a valve body and a valve core disposed within the valve body. The first interface, the second interface, the third interface, and the sixth interface are all disposed on the valve body. When the electric water heater is in the first state and the second state, the first interface is connected to the second interface and the third interface. When the electric water heater is in the first state, the valve core controls the opening degree of the second interface and the third interface to be equal; When the water heater switches from the first state to the second state, the valve core can adjust the opening degree of the second interface, the third interface and / or the sixth interface.

23. The electric water heater as described in claim 20, characterized in that, The electric water heater also includes a water outlet pipe, one end of which is connected to the circulation pipe or the temperature control device, and the other end of which is used to connect to a water terminal.

24. The electric water heater as described in claim 23, characterized in that, When the electric water heater is in the first state, along the water flow direction, the third interface is located upstream of the second interface, and the water in the circulation pipe flows from the third interface to the second interface; When the electric water heater is in the second state, the first interface is connected to the second interface, the third interface and the sixth interface; when the temperature regulating device is used for diversion, the water flowing in from the first interface is diverted to the second interface, the third interface and the sixth interface.

25. The electric water heater as described in claim 24, characterized in that, The electric water heater also includes a fourth state. When the electric water heater is in the fourth state, the first interface and the sixth interface are not connected, and the first interface can only be connected to the second interface and the third interface.

26. The electric water heater as described in claim 17, characterized in that, The temperature control device is installed on the first circulation pipeline, and the other side of the water supply pipeline is directly or through the temperature control device connected to the first circulation pipeline. When the electric water heater is in the second state, and the other side of the water supply pipe is connected to the first circulation pipe through the temperature regulating device... After the water supply in the water supply pipeline is diverted by the temperature control device, part of the water supply flows into the heat exchanger and the water tank through the first circulation pipeline, and the water flowing out of the heat exchanger and the water tank flows out through the second circulation pipeline. The other part of the water supply can mix with the water flowing out of the heat exchanger and the water tank. or, When the electric water heater is in the second state, and the other side of the water supply pipe is directly connected to the first circulation pipe, A portion of the water supplied in the water supply pipeline flows into the heat exchanger and the water tank through the first circulation pipeline, and the water flowing out of the heat exchanger and the water tank flows into the temperature regulating device through the second circulation pipeline. The other portion of the water supplied in the water supply pipeline flows directly into the temperature regulating device. or, When the electric water heater is in the second state, and the other side of the water supply pipe is connected to the first circulation pipe through the temperature regulating device... The water supplied in the water supply pipeline is diverted by the temperature control device and flows into the heat exchanger and the water tank through the first circulation pipeline. The water flowing out of the heat exchanger and the water tank is mixed after flowing out through the second circulation pipeline. or, When the electric water heater is in the second state, and the other side of the water supply pipe is directly connected to the first circulation pipe, Water supplied in the water supply pipeline flows into the heat exchanger and the water tank through the first circulation pipeline, and water flowing out of the heat exchanger and the water tank enters the temperature control device through the second circulation pipeline to mix.

27. The electric water heater as described in claim 26, characterized in that, When the water supply in the water supply pipeline flows only into the heat exchanger and the water tank, the temperature control device includes at least a first interface, a second interface and a third interface, and the second interface and the third interface are connected to the first circulation pipeline. When the electric water heater is in the first state, the third interface and the second interface are connected in sequence along the water flow direction, and the water in the water tank can circulate between the water tank and the heat exchanger. The electric water heater is in a second state, and the first interface can be connected to the second interface and the third interface; or, When a portion of the water supplied in the water supply pipeline flows into the heat exchanger and the water tank, and another portion of the water supplied in the water supply pipeline is used to mix with the water flowing out of the heat exchanger and the water tank... The temperature control device includes at least a first interface, a second interface, a third interface, and a sixth interface, wherein the second interface and the third interface are connected to the first circulation pipeline; When the temperature control device is in the first state, the third interface and the second interface are sequentially connected along the water flow direction, and the water in the water tank can circulate between the water tank and the heat exchanger. The electric water heater is in a second state, with the first interface connected to the second and third interfaces, and the sixth interface connected to the first interface.

28. The electric water heater as described in claim 27, characterized in that, When the electric water heater is in the first state, the third interface and the second interface are sequentially connected along the water flow direction. The first interface and the second interface and / or the third interface are structurally connected, but not connected in the water path.

29. The electric water heater as described in claim 27, characterized in that, The temperature control device includes a valve body and a valve core disposed within the valve body. The first interface, the second interface, the third interface, and the sixth interface are all disposed on the valve body. When the electric water heater is in the first state and the second state, the first interface is connected to the second interface and the third interface. When the electric water heater is in the first state, the valve core controls the opening degree of the second interface and the third interface to be equal; When the water heater switches from the first state to the second state, the valve core can adjust the opening degree of the second interface, the third interface and / or the sixth interface.

30. The electric water heater as described in claim 27, characterized in that, The electric water heater also includes a water outlet pipe, one end of which is connected to the circulation pipe or the temperature control device, and the other end of which is used to connect to a water terminal.

31. The electric water heater as described in claim 1, characterized in that, A heating element is provided in the middle or lower part of the water tank; The phase change chamber is located above the water chamber; The temperature control device is detachably mounted on the phase change chamber; The circulation pipeline includes a first circulation pipeline and a second circulation pipeline. One end of the first circulation pipeline is connected to the water tank, and the other end is connected to the heat exchanger through the temperature control device. One end of the second circulation pipeline is connected to the heat exchanger, and the other end is connected to the water tank. The electric water heater also includes a water supply pipe and a water outlet pipe. One end of the water supply pipe can be connected to a water source, and the other end is connected to the temperature control device. One end of the water outlet pipe is connected to the temperature control device, and the other end is used to connect to a water terminal. The temperature control device, the circulation pipe, the water supply pipe and the water outlet pipe are combined to form a water circuit assembly. The electric water heater also includes a housing, in which the water tank, the phase change tank, and at least a portion of the water circuit components are disposed.

32. The electric water heater as described in claim 31, characterized in that, Both the phase change tank and the water tank extend horizontally. The phase change tank is shorter than the water tank. One end of the phase change tank forms an installation space between the water tank and the end cap of the outer casing to accommodate the water circuit assembly.

33. The electric water heater as described in claim 31, characterized in that, The housing has opposing front and rear sides, the water circuit assembly is disposed near the rear side of the housing, and the electric water heater also includes a computer board disposed near the front side of the housing.

34. The electric water heater as described in claim 33, characterized in that, The temperature control device is located on the upper part near the rear side of the housing, and the inlet of the water supply pipe and the outlet of the water outlet pipe are located on the lower part near the rear side of the housing.

35. The electric water heater as described in claim 33, characterized in that, The computer board is positioned above the front side of the housing.

36. The electric water heater as described in claim 31, characterized in that, The temperature control device includes a valve body, a valve core disposed in the valve body, and a motor for driving the valve core to move. The valve body includes a first interface, a second interface, a third interface, and a fourth interface. The first interface is used to connect to the water supply pipeline, the second interface is used to seal and connect to the phase change tank, the third interface is connected to the other end of the first circulation pipeline, and the fourth interface is connected to the water outlet pipeline.

37. The electric water heater as described in claim 36, characterized in that, The first interface, the third interface, and the fourth interface all face the end cap of the housing.

38. The electric water heater as described in claim 36, characterized in that, The second and third interfaces are positioned closer to the valve core than the first and second interfaces.

39. The electric water heater as described in claim 36, characterized in that, The motor is located at the top of the valve body.

40. The electric water heater as described in claim 31, characterized in that, At least one of the water supply pipeline, the water outlet pipeline, and the circulation pipeline is a flexible connecting pipe.

41. The electric water heater as described in claim 40, characterized in that, The flexible connecting pipe includes PPR pipe and / or metal corrugated pipe.

42. The electric water heater as described in claim 40, characterized in that, The connector of the flexible connecting tube is a metal part or a metal insert set on a plastic material.

43. The electric water heater as described in claim 31, characterized in that, The end of the phase change chamber is provided with a flow channel for connecting the temperature control device and the heat exchanger, and the flow channel is used as part of the circulation pipeline.

44. The electric water heater as described in claim 43, characterized in that, The phase change chamber is provided with a first end plate and a second end plate at its end, with the first end plate located outside the second end plate. The first end plate protrudes outward by a first predetermined dimension at a first predetermined position to form the drainage channel; Alternatively, the second end plate protrudes inward by a first predetermined dimension at a second predetermined position to form the drainage channel; Alternatively, the first end plate protrudes outward by a second predetermined dimension at a first predetermined position and the second end plate protrudes inward by a third predetermined dimension at a second predetermined position, with the first and second predetermined positions at least partially facing each other to form the drainage channel; Alternatively, the phase change chamber may further include a third end plate, which is located outside the first end plate and protrudes outward by a first predetermined size at a first predetermined position to form the drainage channel; Alternatively, the phase change chamber may further include a fourth end plate, which is located inside the second end plate and protrudes inward by a first predetermined dimension at the second predetermined position to form the drainage channel; Alternatively, the phase change chamber may further include a fifth end plate located inside the second end plate, the first end plate protruding outward by a fourth predetermined dimension at a first predetermined position, the fifth end plate protruding inward by a fifth predetermined dimension at a fifth predetermined position, and the second end plate having an opening at a position corresponding to the first predetermined position and the fifth predetermined position, the first end plate, the second end plate and the fifth end plate cooperating to form the drainage channel.

45. The electric water heater as described in claim 43, characterized in that, The drainage channel extends longitudinally along the height direction, with the upper part of the drainage channel connected to the water inlet of the heat exchanger, and the temperature control device sealed and connected to the lower part of the drainage channel.

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