Electric heating module and electric water heater

Abstract

The application discloses an electric heating module and an electric water heater. The electric heating module comprises a heating container, wherein the heating container comprises a base provided with a water inlet and a water outlet, an inner tube installed on the base and having one tube opening communicated with the water inlet, an outer tube sleeved outside the inner tube and installed on the base and having one tube opening communicated with the water outlet, and a plug sealingly plugging the other tube opening of the outer tube, and at least one electric heating film arranged on the outer tube. The water outlet temperature of the electric heating module fluctuates little, thereby improving user experience.

Description

Technical Field

[0001] This invention belongs to the field of household appliance technology, and particularly relates to an electric heating module and an electric water heater. Background Technology

[0002] Currently, water heaters are common household appliances. Among them, electric water heaters are widely used due to their small size, while instant water heaters with instant heating function are used by even more users due to their convenience. Existing electric water heaters typically use electric heating elements for heating, which results in excessively high water temperatures near the heating element. This leads to large fluctuations in the outlet water temperature, resulting in a poor user experience. The technical problem this invention aims to solve is how to design an electric water heater with smaller outlet water temperature fluctuations to improve the user experience. Summary of the Invention

[0003] To address the aforementioned technical problems in the prior art, this invention provides an electric heating module and an electric water heater, which achieves minimal fluctuations in the outlet water temperature of the electric heating module to improve user experience.

[0004] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0005] This invention provides an electric heating module, comprising:

[0006] A heating container, comprising a base, an inner tube, an outer tube, and a plug;

[0007] The base is provided with a water inlet and a water outlet;

[0008] The inner tube is installed on the base, and one end of the inner tube is connected to the water inlet;

[0009] The outer tube is sleeved outside the inner tube and installed on the base, and one end of the outer tube is connected to the outlet.

[0010] The plug seals and blocks the other opening of the outer tube;

[0011] At least one electric heating film is disposed on the outer tube.

[0012] Furthermore, it also includes a support plate sandwiched between the inner tube and the outer tube.

[0013] Furthermore, the support plate has a ring structure, and the support plate is sleeved on the outside of the inner tube, with the outer edge of the support plate abutting against the inner tube wall of the outer tube.

[0014] Furthermore, the support plate is provided with multiple water holes.

[0015] Furthermore, the support plate is arranged at an angle relative to the axis of the inner tube.

[0016] Furthermore, the support plate has an overall spiral structure, and the support plate is spirally arranged around the outside of the inner tube, with the outer edge of the support plate abutting against the inner tube wall of the outer tube.

[0017] Furthermore, the surface of the support plate is provided with a hollow structure.

[0018] Furthermore, it also includes: a heat insulation layer, which wraps around the outside of the heating container.

[0019] Furthermore, a gap is formed between the inner tube and the plug at the tube opening opposite to the plug.

[0020] The present invention also provides an electric water heater, comprising:

[0021] An electric heating module, wherein the electric heating module is adopted;

[0022] Energy storage module, the energy storage module being used to store electrical energy;

[0023] The charging and discharging module controls the charging of the energy storage module and also controls the discharging of the energy storage module to supply power to the electric heating module.

[0024] Compared with the prior art, the advantages and positive effects of the present invention are as follows: by adopting an inner tube sleeve structure, cold water first flows in the outer tube, and the electric heating film set on the outside of the outer tube heats the flowing water. The heated water then flows into the inner tube for final output. The hot water output is directly heated without being heated by the electric heating film, which can avoid excessive fluctuations in the outlet water temperature and achieve small fluctuations in the outlet water temperature of the electric heating module to improve the user experience.

[0025] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of an embodiment of the electric water heater of the present invention;

[0028] Figure 2 This is one of the component distribution diagrams inside the outer shell of the electric water heater embodiment of the present invention;

[0029] Figure 3 This is one of the structural schematic diagrams of the energy storage module in an embodiment of the electric water heater of the present invention;

[0030] Figure 4 for Figure 3 A magnified view of a portion of region A in the middle;

[0031] Figure 5 This is a second schematic diagram of the energy storage module in an embodiment of the electric water heater of the present invention;

[0032] Figure 6 for Figure 5 A magnified view of a portion of region B in the middle;

[0033] Figure 7 This is a schematic diagram of the main frame structure in an embodiment of the electric water heater of the present invention;

[0034] Figure 8 This is one of the structural schematic diagrams of the electric heating module in an embodiment of the electric water heater of the present invention;

[0035] Figure 9 This is a cross-sectional view of the electric heating module in an embodiment of the electric water heater of the present invention;

[0036] Figure 10 This is a partial structural diagram of the electric heating module in an embodiment of the electric water heater of the present invention;

[0037] Figure 11 This is the second diagram showing the distribution of components inside the outer casing of the electric water heater embodiment of the present invention;

[0038] Figure 12 This is the third diagram showing the distribution of components inside the outer shell of the electric water heater embodiment of the present invention;

[0039] Figure 13 This is a second schematic diagram of the structure of the electric heating module in an embodiment of the electric water heater of the present invention. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0041] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] like Figures 1-2As shown, the water heater in this embodiment includes: a shell 1, an electric heating module 2, a power storage module 3, a charge / discharge module 4, and a controller 5. The electric heating module 2, power storage module 3, charge / discharge module 4, and controller 5 are installed in the shell 1. The shell 1 is equipped with an inlet pipe 101 and an outlet pipe 102. The inlet pipe 101 is connected to an external water source (e.g., a tap water pipe) to introduce cold water, while the outlet pipe 102 is used to output hot water. In actual use, the charge / discharge module 4 can control the charging and discharging of the power storage module 3, and uses the electrical energy released by the power storage module 3 to supply the electric heating module 2 for heating. The water supplied from the external water source to the electric heating module 2 is rapidly heated by the electric heating module 2 to achieve instant hot water supply. Typically, the water heater is equipped with a temperature sensor to detect temperature and a flow sensor to detect water flow. The controller 5 controls the operation of the charge / discharge module 4 according to user-set parameters and signals detected by the relevant sensors.The basic functions of each module are explained below: The electric heating module 2 typically includes a heating container and an electric heating element. The heating container has an inlet and an outlet. Water supplied from the water source enters the heating container through the inlet pipe 101. The electric heating element uses electrical energy to heat the water flowing in the heating container. The heated water is output from the outlet of the heating container and transported to the outside through the outlet pipe 102. The electric heating element can be an electric heating tube, electric heating film, or other electric heating devices. The energy storage module 3 uses several batteries to store electrical energy. The batteries can be common battery types, such as lithium batteries or nickel-cadmium batteries. This embodiment does not limit the specific form of the batteries. The charging and discharging module 4 typically has a battery charging / discharging function. The system comprises an electric water heater and a battery discharge unit. The battery charging unit connects to the mains power supply to charge the battery as needed, while the battery discharge unit connects to the electric heating element. The electrical energy released from the battery is applied to the electric heating element through the battery discharge unit to power it. The battery charging and discharging units can use conventional battery charging and discharging circuits, and there are no restrictions on their implementation. The controller 5, as the main control component, controls the operation of the water heater according to user-defined command modes. The controller 5 typically includes a circuit board and a control chip mounted on the board. Since it is powered by a battery, the controller 5 can also be equipped with a battery management system. The system (BMS) uses a battery management system to monitor the battery. For example, it can accurately estimate the state of charge (SOC) of the power battery pack, i.e., the remaining battery capacity. During charging and discharging, it can collect parameters such as voltage, temperature, and current of each battery in real time to prevent overcharging or over-discharging. It can also balance the charging of individual batteries to ensure that all batteries in the battery module reach a balanced state. In addition, the controller 5 can also be equipped with a display screen or touch screen for users to view the operating status of the electric water heater.

[0043] The electric water heater in this embodiment has the following improvements, which will be explained in detail with reference to the accompanying drawings.

[0044] I. To meet the requirements for battery heat dissipation and improve the reliability and safety of battery use. For example... Figures 1-7 As shown, the energy storage module 3 includes several batteries 31 and a heat sink 32. The heat sink 32 is used to mount the batteries 31 and dissipate the heat released by the batteries 31. The batteries 31 are thermally connected to the heat sink 32. Specifically, the heat sink 32 is used to install and fix multiple batteries 31 for easy assembly later. It also dissipates the heat released by the batteries 31. The heat sink 32 can be made of thermally conductive materials, such as aluminum or copper, which are metals with good thermal conductivity.

[0045] To improve the heat transfer efficiency between the battery 31 and the heat sink 32, the battery 31 is attached to the heat sink 32 using thermally conductive adhesive. Specifically, when assembling the battery 31 onto the heat sink 32, thermally conductive adhesive is used to bond the battery 31 to the heat sink 32. On the one hand, during factory assembly, thermally conductive adhesive allows for convenient and quick bonding and assembly of the battery 31 onto the heat sink 32, improving assembly efficiency. On the other hand, thermally conductive adhesive can quickly conduct heat, allowing the heat generated by the battery 31 to be quickly transferred to the heat sink 32, thereby improving the heat transfer efficiency of the battery 31. In this way, the heat sink 32 can quickly absorb the heat generated by the battery 31 to achieve efficient heat dissipation.

[0046] To increase the contact area, the battery 31 has a flat structure. The back of the battery 31 is attached to the heat sink 32 with thermally conductive adhesive. The battery 31 has a rectangular structure, and its thickness is minimized. Therefore, by attaching the back of the battery 31 to the heat sink 32 with thermally conductive adhesive, the overall thickness of the device can be kept thin, truly achieving a slim and lightweight design. Preferably, to fully utilize the front and back space of the heat sink 32 to install more batteries 31, batteries 31 can be attached to both the front and back of the heat sink 32, increasing the number of batteries 31 in the overall device and thus effectively increasing the output power.

[0047] Preferably, for more reliable installation of the battery 31, the heat sink 32 includes a main frame 321 with mounting grooves 3211 on it. The battery 31 is installed in the corresponding mounting groove 3211 using thermally conductive adhesive. Specifically, the main frame 321 is made of a thermally conductive material (e.g., aluminum or copper) to ensure good thermal conductivity and dissipation. The mounting grooves 3211 on the main frame 321 can independently install a single battery 31. Simultaneously, the battery 31 is restrained by the bottom and sides of the mounting groove 3211 to improve assembly reliability. Thus, during subsequent transportation and use, the battery 31 is securely restrained in the mounting groove 3211, ensuring its safety and reliability during transportation. Furthermore, the batteries 31 do not squeeze or interfere with each other, further enhancing safety and reliability during use. The mounting groove 3211 is also provided with a positioning plate 3212. The positioning plate 3212 is used to position the end face of the battery 31 with two electrodes. The positioning plate 3212 is located between the two electrodes and can limit the vertical and horizontal directions of the battery 31 to further improve the assembly reliability.

[0048] In addition, to further improve the assembly reliability of the battery 31 and prevent it from falling off during transportation, a connecting bracket is also provided on the main frame 321. The connecting bracket is snapped onto the main frame 321, resting against the front of the battery 31, thus clamping the battery 31 between the connecting bracket and the main frame 321. Specifically, during assembly, after the battery 31 is bonded to the main frame 321 with thermally conductive adhesive, it is then secured from the outside of the battery 31 within the mounting groove 3211 by the connecting bracket. The mounting groove 3211, the positioning plate 3212, and the connecting bracket provide omnidirectional positioning for the battery 31. Since multiple batteries 31 are arranged in an array on the main frame 321, the connecting bracket allows for unified positioning and installation of batteries 31 located in the same row or column, effectively improving overall assembly efficiency.

[0049] The structure of the aforementioned connecting frame varies depending on the assembly method of the battery 31 and the main frame 321. Specifically, when the battery 31 is installed on the front or back of the main frame 321, the main frame 321 is also provided with multiple first snap-fit ​​interfaces. The heat dissipation frame 32 also includes a first connecting frame, which is provided with multiple first snap-fit ​​connectors. The first snap-fit ​​connectors are snapped into the first snap-fit ​​interfaces, and the battery 31 is sandwiched between the main frame 321 and the first connecting frame. Specifically, when the battery 31 is installed on one surface of the main frame 321, after the battery 31 is bonded to the main frame 321 with thermally conductive adhesive, the first snap-fit ​​connectors are directly snapped into the first snap-fit ​​interfaces of the main frame 321 to complete the assembly of the first connecting frame. The battery 31 is then sandwiched between the first connecting frame and the main frame 321, thereby ensuring that the battery 31 will not come out of the mounting groove 3211.

[0050] Similarly, if batteries 31 are provided on both the front and back of the main frame 321, then multiple through holes 3210 are also provided on the main frame 321; the heat dissipation frame 32 includes: a second connecting frame 322, which is provided with multiple second card interfaces (unmarked); a third connecting frame 323, which is provided with multiple second snap-fit ​​connectors 3231; wherein, the main frame 321 is located between the second connecting frame 322 and the third connecting frame 323, the second snap-fit ​​connectors 3231 pass through the corresponding through holes 3210 and are snapped into the second card interfaces, part of the batteries 31 are sandwiched between the main frame 321 and the second connecting frame 322, and the remaining part of the batteries 31 are sandwiched between the main frame 321 and the third connecting frame 323. Specifically, after the battery 31 is attached to the front and back of the main frame 321 with thermally conductive adhesive, the second snap-fit ​​connector 3231 passes through the through hole 3210 from one side of the main frame 321 and snaps into the second snap-fit ​​interface. At this time, the second connecting bracket 322 and the third connecting bracket 323 are both tightly attached to the front of the battery 31, thereby securing the battery 31.

[0051] Regarding the first snap-fit ​​connector and the second snap-fit ​​connector 3231 described above, in order to realize the snap-fit ​​function, taking the second snap-fit ​​connector 3231 as an example, a claw can be formed at the snap-fit ​​end of the second snap-fit ​​connector 3231, and the claw can be snapped into the second snap-fit ​​interface to realize the snap-fit ​​connection. Alternatively, the second snap-fit ​​connector 3231 may be a plate-like structure, with each free end of the plate-like structure having a raised elastic card 3232. The elastic card 3232 passes through the second card interface and is secured at the edge of the second card interface. Specifically, the elastic card 3232 is formed directly at the free end of the second snap-fit ​​connector 3231 by cutting and bending. Furthermore, the free end of the second snap-fit ​​connector 3231 may have elastic cards 3232 formed on both sides, with the raised directions of the elastic cards 3232 facing away from each other. Thus, after the free end of the second snap-fit ​​connector 3231 is inserted into the second card interface, the elastic card 3232 is first compressed into the second card interface, and then the elastic card 3232 extends out of the second card interface and elastically resets, securing at the edge of the second card interface.

[0052] Furthermore, to more effectively dissipate heat from the battery 31, the battery module 3 also includes a heat collection component. This component collects the heat released by the battery 31 through the heat sink 32. Specifically, the heat generated during the charging and discharging process of the battery 31 is transferred to the heat sink 32. Part of the heat conducted by the heat sink 32 dissipates naturally, while the remaining heat is absorbed by the heat collection component. This component uses an active heat absorption method, enabling faster and more efficient heat absorption. To fully utilize the heat generated by the battery 31 to heat water, the heat collection component includes a cooling water pipe 33, which is attached to the main frame 321 and connected to the water inlet. Specifically, during the process of the electric water heater producing hot water, cold water from the external water supply enters the cooling water pipe 33 through the inlet pipe 101. The cold water flowing through the cooling water pipe 33 is at a low temperature, while the heat generated when the battery 31 discharges heats the main frame 321. The high temperature difference accelerates the heat transfer efficiency between the cold water and the main frame 321, thus quickly absorbing heat. At the same time, the cold water in the cooling water pipe 33 absorbs heat and enters the electric heating module 2. The cold water is heated by the heat released by the battery 31, thereby reducing the power consumption of the electric heating module 2, reducing energy consumption, and increasing the hot water output rate and output. The heat generated during the discharge process is also used to preheat the water temperature in the inlet pipe, preventing the battery temperature from getting too high, extending the battery life, improving the safety level of the battery and water heater, avoiding energy waste, realizing multi-level energy utilization, and improving the energy efficiency of the water heater. The cooling water pipes 33 are arranged in a reciprocating bend on the main frame 321, forming a serpentine coil structure to increase the thermal contact area with the main frame 321 and accelerate heat dissipation efficiency.

[0053] To facilitate the installation of the cooling water pipe 33, a pipe groove 3213 matching the extension direction of the cooling water pipe 33 can be formed on the front or back of the main frame 321. The cooling water pipe 33 is located in the pipe groove 3213, which increases the contact area between the cooling water pipe 33 and the main frame 321 to improve heat transfer efficiency. At the same time, the cooling water pipe 33 being located in the pipe groove 3213 does not increase the overall thickness of the energy storage module 3, thus ensuring a slim design. Alternatively, a sandwich structure can be formed in the main frame 321, with the cooling water pipe 33 located in the sandwich structure. The cooling water pipe 33 can uniformly absorb the heat released by the energy storage modules 31 on both sides of the main frame 321 within the sandwich structure. The heat collection component can also include a phase change heat storage material, which is filled in the sandwich structure. The phase change heat storage material can effectively fill the entire sandwich structure to maximize heat dissipation efficiency. Furthermore, during the charging process of the energy storage module 3, the heat released by the battery 31 can be collected by the phase change heat storage material. Thus, during the start-up phase of the electric water heater, the heat released by the phase change heat storage material can be used to preheat the water in the cooling water pipe 33, achieving rapid hot water output. The heat collection component can collect the heat generated during the charging, discharging, and equalization states of the battery 31, preventing excessive battery heat, extending battery life, and improving the safety level of both the battery and the electric water heater. Additionally, by storing electrical energy in the battery 31, power can be cut off when the battery 31 discharges, further enhancing safety. Moreover, the battery 31 can meet high-power heating requirements without the need for insulation, and by utilizing the phase change material to convert energy consumption into energy storage, multi-level energy utilization reduces energy waste, and no reheating or waiting is required before reuse.

[0054] II. To achieve water and electricity separation and improve the reliability and safety of battery use. For example... Figures 1-3 As shown, the outer casing 1 has a first mounting cavity 100 and a second mounting cavity 200. The electric heating module 2 is disposed in the first mounting cavity 100, while the charging / discharging module 4 and the energy storage module 3 are disposed in the second mounting cavity 200. Specifically, the electric heating module 2, used for heating water, is independently placed in the first mounting cavity 100, while the charging / discharging module 4 and the energy storage module 3 are installed in the second mounting cavity 200 to achieve isolation from the electric heating module 2. During use, even if water leaks from the electric heating module 2 while heating water, the leaked water will only flow into the first mounting cavity 100 and will not affect the charging / discharging module 4 and the energy storage module 3 in the second mounting cavity 200, thus preventing the charging / discharging module 4 or the energy storage module 3 from being submerged in water and causing a short circuit.

[0055] To create two isolated mounting cavities within the outer casing 1, a partition 11 can be installed within the outer casing 1. The partition 11 divides the interior of the outer casing 1 into a first mounting cavity 100 and a second mounting cavity 200. Specifically, the partition 11, installed within the outer casing 1, divides the internal space of the outer casing 1 into two parts, forming the first mounting cavity 100 and the second mounting cavity 200. The partition 11 achieves water and electricity isolation; in the event of a leak in the electric heating module 2, water will be blocked by the partition 11 to prevent it from entering the second mounting cavity 200. Simultaneously, while ensuring water and electricity isolation, to supply power to the electric heating module 2, the partition 11 is provided with wiring holes (not marked). The electric heating module 2 is connected to the charging / discharging module 4 via a power supply cable (not shown). The power supply cable passes through the wiring holes, and sealing rings or other structures can be installed in the wiring holes to further effectively seal the gap between the power supply cable and the wiring holes, further improving the sealing performance. In addition, a heat insulation layer can be configured on the partition 11. In this way, when the electric heating module 2 is powered on, the heat released to the outside by the electric heating module 2 can be isolated by the partition 11, so as to prevent the heat of the electric heating module 2 from being transferred to the second mounting cavity 200 and affecting the charging and discharging module 4 and the energy storage module 3.

[0056] When cooling water pipe 33 is used to dissipate heat from the energy storage module 3, mounting holes (unmarked) are provided on the partition 11. The cooling water pipe 33 passes through the mounting holes. Similarly, sealing rings or other structures can be configured in the mounting holes to further effectively seal the gap between the cooling water pipe 33 and the mounting holes. The connection between the cooling water pipe 33 and the inlet pipe 101 is located in the first mounting cavity 100. Similarly, the connection between the cooling water pipe 33 and the electric heating module 2 is also located in the first mounting cavity 100. The portion of the cooling water pipe 33 located in the second mounting cavity 200 is a complete pipe body, thereby preventing water leakage at the connection of the cooling water pipe 33 from affecting the charging / discharging module 4 and the energy storage module 3 in the second mounting cavity 200.

[0057] Thirdly, in order to reduce the temperature fluctuation range of the output hot water during the water heating process of electric heating module 2, such as... Figures 8-10As shown, the electric heating module 2 includes a heating container 21 and an electric heating component, wherein the electric heating component can be an electric heating film 22. The heating container 21 includes a base 211, an inner tube 212, an outer tube 213, and a plug 214. The base 211 is provided with an inlet 2111 and an outlet 2112. The inner tube 212 is installed on the base 211, and one end of the inner tube 212 is connected to the inlet 2111. The outer tube 213 is sleeved on the outside of the inner tube 212 and installed on the base 211, and one end of the outer tube 213 is connected to the outlet 2112. The plug 214 seals the other end of the outer tube 213. Multiple electric heating films 22 can be arranged along the axial direction on the outside of the outer tube 213. Specifically, in actual use, water enters the outer pipe 213 through the inlet 2111 of the base 211. As the water flows through the outer pipe 213, the electric heating film 22 heats the water from the outside. The water flows along the outer pipe 213, forming hot water, and enters the inner pipe 212. The water flowing through the inner pipe 212 is also enveloped by the water flowing in the outer pipe 213. Thus, the heat dissipated by the water flowing in the inner pipe 212 is absorbed by the water flowing in the outer pipe 213, effectively reducing heat loss and improving heating efficiency. Furthermore, the base 211 is used to install the inner pipe 212 and the outer pipe 213. The water flow interlayer formed between the inner and outer pipes constitutes the inlet channel, while the inner pipe 212 constitutes the outlet channel. The water flowing in the outlet channel is enveloped by the water flowing in the inlet channel. The water flowing in the inner pipe 212 exchanges heat with the water in the outer pipe 213, thereby reducing the thermal deviation between the upward and downward flow of water. Furthermore, the use of an inner and outer pipe structure avoids the need for separate inlet and outlet pipes, saving space. The outer wall of the inner pipe is a sandwiched space, utilizing the heat loss from the water flowing through the inner pipe 212 to heat the water flowing between the inner pipe 212 and the outer pipe 213, improving thermal efficiency. Notably, the water output from the inner pipe 212 is not directly heated by the electric heating film 22, effectively reducing fluctuations in the output water temperature. The heating power can be adjusted by regulating the discharge current of the energy storage module 3 or the number of electric heating films 22 used, allowing the water to quickly reach the user-set temperature.

[0058] Preferably, a support plate 215 is provided between the inner pipe 212 and the outer pipe 213. The support plate 215 securely mounts the inner pipe 212 within the outer pipe 213, ensuring a uniform thickness of the water flow interlayer formed between the inner and outer pipes 212. The support plate 215 can be annular, fitted around the outer side of the inner pipe 212, with its outer edge resting against the inner wall of the outer pipe 213. Multiple support plates 215 can be arranged along the axial direction of the inner pipe 212 to effectively maintain a constant distance between the inner and outer pipes 212. Alternatively, the support plate 215 can be spirally arranged around the outer side of the inner pipe 212, with its outer edge resting against the inner wall of the outer pipe 213.

[0059] Furthermore, to reduce the occurrence of hot and cold water stratification, the support plate 215 is used to disturb the water flowing in the outer pipe 213, disrupting the water flow boundary layer and rapidly promoting the mixing of hot and cold water, further reducing the fluctuation range of the outlet water temperature. Specifically, for the annular support plate 215, multiple water holes (unmarked) are provided on the support plate 215. The water flowing in the outer pipe 213 is turbulent through the water inlets, achieving the purpose of mixing hot and cold water. The support plate 215 can be arranged at an angle relative to the axis of the inner pipe 212 to further guide the water flow and create turbulence. For the spiral support plate 215, it can itself guide the water flow to rotate, achieving the purpose of turbulence. The surface of the support plate 215 is provided with a hollow structure, which can more effectively increase the turbulence effect. Under the turbulence effect of the support plate 215, the phenomenon of film boiling in the water in the outer pipe 213 due to excessive heating temperature can be further reduced or avoided. To maximize the utilization of the heat generated by the electric heating film 22 and reduce energy consumption, an insulation layer is provided on the outside of the heating container 21. This insulation layer completely wraps around the heating container 21, reducing heat loss from the electric heating film 22, improving thermal efficiency, and reducing energy consumption. Simultaneously, a gap is formed between the pipe opening of the inner tube 212 and the plug 214, effectively mitigating water resistance caused by changes in water flow direction.

[0060] Based on the above technical solution, there are various ways to connect the battery 31. Depending on the power supply voltage output by the energy storage module 3, the battery 31 can be connected to a corresponding circuit. For example, the energy storage module 3 can output high-voltage electricity of 150V-222V to match the mains power, or it can output low-voltage electricity, preferably 36V-48V, which is 120V lower than the safe DC voltage for the human body. The specific details are explained below with reference to the accompanying drawings.

[0061] like Figure 2As shown, under low-voltage power supply, the energy storage module 3 is used to store electrical energy and output a low-voltage voltage of 36V-48V. The energy storage module 3 can be divided into multiple energy storage modules, each of which includes multiple batteries 31 connected in parallel to meet the requirement of a large output current of the energy storage module 3. The multiple energy storage modules are connected in series to achieve an output voltage of 36V-48V, ultimately meeting the requirement of high-power water heating. The charging and discharging module 4 controls the output current of the energy storage module 3 to uniformly control the power supply of each electric heating component in the electric heating module. The battery discharge unit of the charging and discharging module 4 can be equipped with multiple electronic control switches. Each electronic control switch is used to connect to the corresponding electric heating component and control the power supply of the electric heating component. In the actual heating process, the heating power can be adjusted by controlling the output current of the energy storage module 3, and the heating power can also be adjusted by controlling the power supply of the corresponding electric heating component through the electronic control switch. The electronic control switch can be a relay or an insulated gate bipolar transistor.

[0062] Similarly, for low-voltage power supply, the battery 31 can also be connected in series first and then in parallel, such as... Figure 11 As shown, each energy storage module includes multiple batteries 31 connected in series, allowing the energy storage module to output a voltage of 36V-48V. Multiple energy storage modules are connected in parallel to meet the requirement of outputting a large current to satisfy high power requirements. Each energy storage module independently supplies power to its corresponding electric heating component. Correspondingly, the charging and discharging module 4 includes multiple charging and discharging electronic modules 41, which control the charging and discharging of the corresponding energy storage modules. Each charging and discharging electronic module is also equipped with corresponding charging and discharging units. No specific physical representation of the charging and discharging electronic modules is specified here. Furthermore, the series-then-parallel connection of the batteries 31 simplifies the connection process. Figure 7 As shown, multiple charging and discharging electronic modules 41 are respectively arranged on both sides of the main frame 321. The multiple charging and discharging electronic modules located on the same side of the main frame 321 are arranged longitudinally. Multiple wiring holes 3214 are arranged longitudinally in the middle of the main frame 321. Among them, multiple batteries 31 in the same energy storage module are located on the same side of the wiring holes 3214 and distributed on the front and back of the main frame 321. The batteries 31 located on the front of the main frame 321 are connected in series, and the batteries 31 located on the back of the main frame 321 are connected in series. The batteries 31 on the front of the main frame 321 near the wiring holes 3214 are connected in series with the batteries 31 on the back of the main frame 321 near the wiring holes 3214 through wires. The two batteries 31 on the front and back of the main frame 321 near the corresponding charging and discharging electronic modules 41 are connected to the charging and discharging electronic modules 41.

[0063] like Figure 12As shown, under high-voltage power supply, the energy storage module 3 outputs 150V-222V high-voltage electricity. Therefore, the energy storage module 3 can be divided into multiple energy storage modules, each including multiple parallel-connected batteries 31. These multiple energy storage modules are connected in series to meet the output 150V-222V high-voltage electricity requirement. Thus, the energy storage module uses multiple parallel-connected batteries 31 to obtain a sufficiently large output current, while the multiple energy storage modules are connected in series to obtain a high voltage. Preferably, to more effectively improve the overall heating power, the electric water heater can also be equipped with an external power discharge module 6. 6 is used to connect to the external power supply and supply power to the remaining electric heating components. Specifically, in the normal heating mode, the power supplied by the energy storage module 3 is sufficient to meet the heating requirements of the electric heating module 2. When more power is needed to output more hot water, the external power discharge module 6 will provide auxiliary power to increase the heating power. The external power discharge module 6 is connected to the mains power and converts the mains power to the same voltage value as the output voltage of the energy storage module 3, and together they supply power to the electric heating module 2. The physical manifestation of the external power discharge module 6 can be referred to as the discharge control device of a conventional mains-powered water heater, and is not limited here. Preferably, the electric heating module 2 can be configured with two heating containers 21, each equipped with an electric heating element. The electric heating element in one heating container 21 is powered by a storage module 3, while the electric heating element in the other heating container 21 is powered by an external power discharge module 6. Alternatively, all the electric heating elements in one heating container 21 can be powered by the storage module 3, while some of the electric heating elements in the other heating container 21 can be powered by the storage module 3, and the remaining electric heating elements can be powered by an external power discharge module 6. When the electric heating elements in the heating containers 21 are powered by high-voltage electricity, to improve safety and reliability, a mounting base (not shown) is provided in the outer casing 1. The heating container 21 is mounted on the mounting base, and a clamp is bolted to the mounting base. The heating container 21 is sandwiched between the clamp and the mounting base. An insulating partition is provided between the heating container 21 and the clamp and mounting base, using the insulating partition to ensure that the electric heating module 2 is insulated from the outer casing 1. Figure 12 The energy storage module 3 can also output a voltage of 36V-48V. In this case, high voltage and low voltage are mixed. All the electric heating components on one heating container 21 are powered by the energy storage module 3, while all the electric heating components on the other heating container 21 are powered by the external power discharge module 6.

[0064] However, in the case of using two heating containers 21, such as Figure 13As shown, two heating containers 21 are arranged side by side and connected by a water pipe 23. A conduit 24 is provided between the two heating containers 21, through which power cables pass and are electrically connected to the electric heating components on the corresponding heating containers 21. The energy storage module 3 supplies power to the corresponding electric heating components through the corresponding power cables, and the external power supply discharge module 6 supplies power to the corresponding electric heating components through the corresponding power cables. The two ends of the water pipe 23 form an arc-shaped bend structure and extend along the outside of the conduit 24. The conduit 24 protects the power cables to reduce the impact of heat released by the electric heating components on the power cables. At the same time, the area between the two heating containers 21 is used to install the conduit 24 and the water pipe 23 to effectively reduce the space occupied by the electric heating module 2.

[0065] Based on the above technical solution, the electric water heater in this embodiment, in order to accurately control the outlet water temperature, further includes: a flow sensor, used to detect the inlet or outlet water flow of the electric heating module 2; a first temperature sensor, used to detect the inlet water temperature at the inlet 2111; a second temperature sensor, used to detect the outlet water temperature at the outlet 2112; and a controller 5, used to control the operation of the charging and discharging module 4 according to user-set parameters and the signals detected by the flow sensor, the first temperature sensor, and the second temperature sensor. Specifically, the flow sensor can detect the outlet water volume of the electric water heater, the first temperature sensor detects the inlet cold water temperature, and the second temperature sensor detects the outlet hot water temperature. The controller, based on the user-set desired outlet water temperature value and using the detected water flow and temperature, accurately controls the operation of the charging and discharging module 4 to adjust the power supply of the energy storage module 3. The specific control method is as follows: after setting the outlet water temperature, when the flow sensor detects the water flow, the heat required to heat the water is calculated based on the inlet water temperature detected by the first temperature sensor and the water flow detected by the flow sensor, so as to control the energy storage module 3 to supply power to the electric heating module 2 to heat the water. Specifically, given the inlet water temperature, water flow rate, and desired outlet water temperature, the required heat can be calculated based on the temperature difference between the inlet water temperature and the user-set temperature, as well as the water flow rate. This heat is then converted into the required heating power to control the discharge of the battery storage module 3. The controller 5 further adjusts the charging and discharging module 4 based on the outlet water temperature detected by the second temperature sensor, ensuring more efficient discharging of the battery storage module for heating. This achieves an outlet water temperature difference within ±1℃, effectively improving the user experience. Based on the temperature signal from the second temperature sensor, if the detected temperature is lower than the set outlet water temperature, the discharge power of the battery storage module is increased; if the detected temperature is higher than the set outlet water temperature, the discharge power is decreased. Preferably, when using an external power supply discharge module 6 for auxiliary power, if the temperature detected by the second temperature sensor is lower than the set outlet water temperature when the battery is at maximum discharge power, the external power supply discharge module is activated to assist in heating the electric heating module.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. An electric water heater, characterized in that, include: The electric heating module, the energy storage module, and the charging and discharging module are provided. The energy storage module is used to store electrical energy, and the charging and discharging module is used to control the energy storage module to charge and to control the energy storage module to discharge in order to supply power to the electric heating module. The electric heating module includes: a heating container and at least one electric heating film; The heating container includes a base, an inner tube, an outer tube, and a plug; the base is provided with an inlet and an outlet; the inner tube is installed on the base, and one end of the inner tube is connected to the inlet; the outer tube is sleeved outside the inner tube and installed on the base, and one end of the outer tube is connected to the outlet; the plug seals the other end of the outer tube; the electric heating film is disposed on the outer tube; The energy storage module includes several batteries and a heat sink, with the batteries and heat sink connected by thermal conductivity. The heat sink includes a main frame, a second connecting frame, and a third connecting frame. The main frame is provided with a mounting groove and multiple through holes. The battery is installed in the corresponding mounting groove by thermally conductive adhesive. The battery can be limited in the mounting groove by the bottom and sides of the mounting groove. The mounting groove is also provided with a positioning plate, which is used to position the end face of the battery with two electrodes. The second connecting frame is provided with multiple second card interfaces, and the third connecting frame is provided with multiple second card connectors. The main frame is located between the second connecting frame and the third connecting frame. The second card connectors pass through the corresponding through holes and are snapped into the second card interfaces. Part of the battery is clamped between the main frame and the second connecting frame, and the remaining part of the battery is clamped between the main frame and the third connecting frame. The second card connector is generally plate-shaped, and the free ends of the plate-shaped structure are respectively provided with raised elastic cards. The elastic cards pass through the second card interfaces and are snapped into the edges of the second card interfaces.

2. The electric water heater according to claim 1, characterized in that, Also includes: A support plate is sandwiched between the inner tube and the outer tube.

3. The electric water heater according to claim 2, characterized in that, The support plate has a ring structure and is sleeved on the outside of the inner tube. The outer edge of the support plate is attached to the inner tube wall of the outer tube.

4. The electric water heater according to claim 3, characterized in that, The support plate is provided with multiple water holes.

5. The electric water heater according to claim 4, characterized in that, The support plate is arranged at an angle relative to the axis of the inner tube.

6. The electric water heater according to claim 2, characterized in that, The support plate has a spiral structure and is arranged spirally around the outside of the inner tube. The outer edge of the support plate is attached to the inner tube wall of the outer tube.

7. The electric water heater according to claim 2, characterized in that, The surface of the support plate is provided with a hollow structure.

8. The electric water heater according to claim 1, characterized in that, Also includes: An insulation layer that completely wraps around the heating container on the outside.

9. The electric water heater according to claim 1, characterized in that, The inner tube and the plug are separated by a gap.

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