Energy storage module and electric water heater

Abstract

The application discloses a kind of electric storage module and electric water heater.The electric storage module includes: a number of batteries, the battery is used to store electric energy;Heat dissipation frame, the heat dissipation frame is used to install the battery and is used to dissipate the heat released by the battery;Wherein, the battery and the heat dissipation frame heat conduction connection.By using heat dissipation frame to install battery, the heat generated in the process of charging and discharging of battery can be transferred to heat dissipation frame, and heat dissipation frame can dissipate the heat generated by battery, so as to improve the heat dissipation efficiency of battery, to prolong the service life of battery.

Description

Technical Field

[0001] The present invention belongs to the technical field of household appliances, and in particular relates to a power storage module and an electric water heater. Background Art

[0002] At present, water heaters are household appliances commonly used in people's daily lives. Among them, electric water heaters are widely used due to their small size, and instant water heaters with instant heating function are used by more users because of their convenience. However, due to the limitation of household electrical wires on current, the power of instant water heaters is relatively low and cannot meet the user's requirements for high-flow bathing. Chinese patent application No. 2018107213469 discloses an instant electric heating device equipped with a battery, that is, a battery pack is used as an electric heating device to provide electrical energy for heating, thereby realizing instant water supply. Among them, the battery pack and the electric heating device are both installed in the outer casing. During the battery charging and discharging process, the heat generated by the battery, especially under high-power conditions, cannot be dissipated in a timely and effective manner, which shortens the battery life and reduces the charging and discharging performance. How to design an electric water heater with high battery heat dissipation efficiency is the technical problem to be solved by the present invention. Summary of the Invention

[0003] In view of the above technical problems existing in the prior art, the present invention provides a battery module and an electric water heater, which can quickly and effectively dissipate heat from the battery, thereby extending the battery life and improving the charging and discharging performance and heat dissipation efficiency.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0005] The present invention provides a power storage module, comprising:

[0006] a plurality of storage batteries for storing electrical energy;

[0007] a heat dissipation rack, the heat dissipation rack being used to mount the battery and dissipate heat released by the battery;

[0008] Wherein, the battery is thermally connected to the heat dissipation frame.

[0009] Furthermore, the surface of the battery is abutted against the heat dissipation frame via thermally conductive adhesive.

[0010] Furthermore, the battery is of a flat structure as a whole, and the back of the battery is affixed to the heat sink via thermally conductive adhesive.

[0011] Furthermore, the heat dissipation frame includes: a main frame body, the main frame body is provided with mounting grooves, and the batteries are installed in the corresponding mounting grooves.

[0012] Furthermore, the main frame is provided with a plurality of first card interfaces; the heat dissipation frame also includes: a first connecting frame, on which a plurality of first card connectors are provided; wherein the first card connectors are clamped in the first card interfaces, and the battery is clamped between the main frame and the first connecting frame.

[0013] Furthermore, the main frame is also provided with a plurality of through holes; the heat dissipation frame includes: a second connecting frame, on which a plurality of second card interfaces are provided; a third connecting frame, on which a plurality of second card connectors are provided; wherein, the main frame is located between the second connecting frame and the third connecting frame, the second card connectors are inserted through the corresponding through holes and are mounted in the second card interfaces, part of the batteries are clamped between the main frame and the second connecting frame, and the remaining part of the batteries are clamped between the main frame and the third connecting frame.

[0014] Furthermore, the first snap-fit ​​connector and the second snap-fit ​​connector are overall plate-shaped structures, and the free ends of the plate-shaped structures are respectively provided with raised elastic cards. The elastic cards of the first snap-fit ​​connector are clamped on the first card interface, and the elastic cards of the second snap-fit ​​connector are clamped on the second card interface.

[0015] Furthermore, the free ends of the first clamping connector and the second clamping connector are respectively provided with clamping claws.

[0016] Furthermore, it also includes: a cooling water pipe, which is attached to the heat dissipation frame.

[0017] The present invention also provides an electric water heater, comprising:

[0018] An electric heating module, wherein the electric heating module is provided with a water inlet and a water outlet, and the electric heating module is used to heat cold water input from the water inlet and output hot water from the water outlet;

[0019] A power storage module, wherein the power storage module adopts the above-mentioned power storage module and is used to store electric energy;

[0020] A charging and discharging module is used to control the charging of the power storage module and to control the discharging of the power storage module to supply power to the electric heating module.

[0021] Compared with the prior art, the advantages and positive effects of the present invention are: by using a heat dissipation rack to install the battery, the heat generated by the battery during the charging and discharging process can be transferred to the heat dissipation rack, and the heat dissipation rack can dissipate the heat generated by the battery, thereby improving the heat dissipation efficiency of the battery and extending the service life of the battery.

[0022] Other features and advantages of the present invention will become more apparent after reading the detailed description of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic structural diagram of an electric water heater embodiment of the present invention;

[0025] Figure 2 This is one of the component distribution diagrams inside the housing of the electric water heater embodiment of the present invention;

[0026] Figure 3 This is one of the structural diagrams of the power storage module in the electric water heater embodiment of the present invention;

[0027] Figure 4 for Figure 3 A partial enlarged schematic diagram of area A in the middle;

[0028] Figure 5 This is the second structural diagram of the power storage module in the electric water heater embodiment of the present invention;

[0029] Figure 6 for Figure 5 A partial enlarged schematic diagram of area B in the middle;

[0030] Figure 7 This is a structural diagram of the main frame of the electric water heater embodiment of the present invention;

[0031] Figure 8 This is one of the structural diagrams of the electric heating module in the electric water heater embodiment of the present invention;

[0032] Figure 9 A cross-sectional view of an electric heating module in an embodiment of an electric water heater of the present invention;

[0033] Figure 10 A schematic diagram of the partial structure of the electric heating module in an embodiment of the electric water heater of the present invention;

[0034] Figure 11 This is the second diagram of the device distribution inside the housing of the electric water heater embodiment of the present invention;

[0035] Figure 12 This is the third diagram of the device distribution inside the housing of the electric water heater embodiment of the present invention;

[0036] Figure 13This is the second structural diagram of the electric heating module in the electric water heater embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0038] It should be noted that in the description of the present invention, terms such as "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions 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 component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] like Figures 1-2As shown, the water heater of the embodiment comprises a housing 1, an electric heating module 2, an electricity storage module 3, a charging and discharging module 4 and a controller 5, wherein the electric heating module 2, the electricity storage module 3, the charging and discharging module 4 and the controller 5 are installed in the housing 1, the housing 1 is provided with a water inlet pipe 101 and a water outlet pipe 102, the water inlet pipe 101 is connected with an external water supply source (for example, a tap water pipe) for introducing cold water, and the water outlet pipe 102 is used for outputting hot water. In actual use, the charging and discharging module 4 can control the charging and discharging of the electricity storage module 3, and the electricity released by the electricity storage module 3 is used to supply the electric heating module 2 for heating, the water delivered by the external water supply source to the electric heating module 2 is quickly heated by the electric heating module 2 to achieve the purpose of instant water supply. Usually, a temperature sensor for detecting temperature and a flow sensor for detecting water flow are arranged on the water heater, and the controller 5 controls the operation of the charging and discharging module 4 according to the user-set parameters and the signals detected by the related sensors.Among them, the basic functions of each of the above modules are explained: the electric heating module 2 usually includes a heating container and an electric heating component, the heating container has a water inlet and a water outlet, the water transported by the water supply source enters the heating container from the water inlet through the water inlet pipe 101, the electric heating component obtains electric energy to heat the water flowing in the heating container, and the heated hot water is output from the water outlet of the heating container and transported to the outside through the water outlet pipe 102, and the electric heating component can adopt electric heating devices such as electric heating tubes and electric heating films; the power storage module 3 adopts a number of batteries to store electric energy, and the batteries can adopt existing common battery types, such as lithium batteries or nickel-cadmium batteries, etc. This embodiment does not limit the specific form of the batteries; the charge and discharge module 4 usually has a battery charge and discharge module. The battery charging unit and the battery discharging unit are connected to the mains electricity to charge the battery as needed, and the battery discharging unit is connected to the electric heating component, and the electric energy released by the battery is applied to the electric heating component through the battery discharging unit to power the electric heating component. The battery charging unit and the battery discharging unit can adopt the form of conventional battery charging circuit and battery discharging circuit, which are not limited here; the controller 5 is the main control component and can control the operation of the electric water heater according to the command mode set by the user. The controller 5 usually includes a circuit board and a control chip arranged on the circuit board. Since the battery is used for power supply, the controller 5 can also be configured with a battery management system (English: Battery Management The controller 5 utilizes a battery management system to monitor the battery, for example, accurately estimating the state of charge (SOC) of the power battery pack, i.e., the remaining battery capacity, collecting parameters such as the voltage, temperature, and current of each battery in real time during the charging and discharging process to prevent overcharging or overdischarging, and performing balanced charging of the individual batteries so that each battery in the storage module reaches a balanced and consistent state. In addition, the controller 5 may also be configured with a display screen or a touch screen for the user to view the operating status of the electric water heater.

[0040] The electric water heater of this embodiment has the following improvements, which are specifically described in conjunction with the accompanying drawings.

[0041] 1. To meet the requirements of battery heat dissipation and improve the reliability and safety of battery use. Figures 1-7 As shown, the battery module 3 includes several batteries 31 and a heat sink 32. The heat sink 32 is used to mount the batteries 31 and dissipate heat generated by the batteries 31. The batteries 31 are thermally connected to the heat sink 32. Specifically, the heat sink 32 is used to mount and secure multiple batteries 31 to facilitate later assembly. It also dissipates heat generated by the batteries 31. The heat sink 32 can be made of a thermally conductive material, such as aluminum or copper, or other metals with good thermal conductivity.

[0042] In order to improve the heat transfer efficiency between the battery 31 and the heat sink 32, the battery 31 is adhered to the heat sink 32 by thermally conductive adhesive. Specifically, when the battery 31 is assembled on the heat sink 32, the thermally conductive adhesive is used to bond the battery 31 to the heat sink 32. On the one hand, the thermally conductive adhesive can be used to conveniently and quickly bond and assemble the battery 31 to the heat sink 32 during the factory assembly process, thereby improving the assembly efficiency. On the other hand, the thermally conductive adhesive can quickly conduct heat. The heat generated by the battery 31 is quickly transferred to the heat sink 32 through the thermally conductive adhesive, thereby improving the heat transfer efficiency of the battery 31. In this way, the heat sink 32 can be used to quickly absorb the heat generated by the battery 31 to achieve efficient heat dissipation.

[0043] To increase the contact area, the battery 31 is flat overall. The back of the battery 31 is attached to the heat sink 32 via thermally conductive adhesive. The battery 31 is a rectangular parallelepiped, with its thickness being the smallest. This ensures that the overall device is thin after the back of the battery 31 is attached to the heat sink 32 via thermally conductive adhesive, achieving a truly lightweight design. Preferably, to fully utilize the front and back space of the heat sink 32 to accommodate 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 configured for the entire device and effectively increasing output power.

[0044] Preferably, to more reliably install the battery 31, the heat sink 32 includes a main frame 321, with mounting grooves 3211 provided thereon. The battery 31 is mounted in the corresponding mounting grooves 3211 using thermally conductive adhesive. Specifically, the main frame 321 is made of a thermally conductive material (e.g., aluminum or copper) to ensure that the main frame 321 has excellent thermal conductivity and heat dissipation capabilities. The mounting grooves 3211 formed in the main frame 321 are capable of independently mounting a single battery 31. Furthermore, the battery 31 is restrained within the mounting groove 3211 by the bottom and sides of the mounting groove 3211 to improve assembly reliability. This ensures that during later transportation and use, the battery 31 is securely restrained within the mounting groove 3211, ensuring its safety and reliability during transportation. Furthermore, the battery 31 is prevented from squeezing each other, further improving safety and reliability in use. Among them, a positioning plate 3212 is also provided in the installation groove 3211. 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 up and down and left and right directions of the battery 31 to further improve the assembly reliability.

[0045] In addition, to further improve the assembly reliability of the battery 31 and prevent it from falling off during transportation, a connecting bracket is provided on the main frame 321. The connecting bracket is snapped onto the main frame 321 and rests against the front of the battery 31, thereby sandwiching the battery 31 between the connecting bracket and the main frame 321. Specifically, during assembly, the battery 31 is bonded to the main frame 321 using thermally conductive adhesive. The connecting bracket then restrains the battery 31 in the mounting groove 3211 from the outside of the battery 31 via the connecting bracket. The restraining action of the mounting groove 3211, the positioning plate 3212, and the connecting bracket ensures that the battery 31 is fully positioned. Since multiple batteries 31 are arranged in an array on the main frame 321, the connecting bracket allows for uniform positioning and installation of batteries 31 in the same row or column, effectively improving overall assembly efficiency.

[0046] The structural form of the above-mentioned connecting frame varies according to the different assembly methods of the battery 31 and the main frame body 321. Specifically, when the battery 31 is installed on the front or back of the main frame body 321, a plurality of first card interfaces are further provided on the main frame body 321; the heat dissipation frame 32 also includes: a first connecting frame, on which a plurality of first card connectors are provided; wherein the first card connectors are snapped into the first card interfaces, and the battery 31 is clamped between the main frame body 321 and the first connecting frame. Specifically, when the battery 31 is installed on one surface of the main frame body 321, after the battery 31 is bonded to the main frame body 321 by thermally conductive adhesive, the first card connector is directly snapped into the first card interface of the main frame body 321 to complete the assembly of the first connecting frame, and the battery 31 is clamped between the first connecting frame and the main frame body 321, thereby ensuring that the battery 31 will not detach from the mounting groove 3211.

[0047] Similarly, when batteries 31 are provided on both the front and back sides of the main frame 321, a plurality of through holes 3210 are further provided on the main frame 321; the heat dissipation frame 32 includes: a second connecting frame 322, on which a plurality of second card interfaces (unmarked) are provided; a third connecting frame 323, on which a plurality of second card connectors 3231 are provided; wherein the main frame 321 is located between the second connecting frame 322 and the third connecting frame 323, and the second card connectors 3231 pass through the corresponding through holes 3210 and are clamped in the second card interfaces, so that part of the batteries 31 are clamped between the main frame 321 and the second connecting frame 322, and the remaining part of the batteries 31 are clamped between the main frame 321 and the third connecting frame 323. Specifically, after the battery 31 is correspondingly attached to the front and back of the main frame 321 through thermal conductive glue, the second snap-fit ​​connector 3231 passes through the through hole 3210 from one side of the main frame 321 and is snapped into the second snap interface. At this time, the second connecting frame 322 and the third connecting frame 323 are both tightly attached to the front of the battery 31, thereby fastening the battery 31.

[0048] For the first snap-in connector and the second snap-in connector 3231 recorded above, in order to realize the snap-in function, taking the second snap-in connector 3231 as an example, a claw can be formed at the snap-in end of the second snap-in connector 3231, and the claw is snapped into the second snap interface to realize the snap-in connection. Alternatively, the second snap-fit ​​connector 3231 is a plate-like structure as a whole, and the free ends of the plate-like structure are respectively provided with raised elastic cards 3232, which pass through the second card interface and are stuck 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, and the free end of the second snap-fit ​​connector 3231 can form elastic cards 3232 on both sides, and the raised directions of the elastic cards 3232 on both sides are set back to each other. In this way, 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 from the second card interface and elastically resets, and the elastic card 3232 will be stuck at the edge of the second card interface.

[0049] Furthermore, in order to dissipate heat from the battery 31 more effectively, the power storage module 3 also includes a heat collection component, which is used to collect the heat released by the battery 31 through heat transfer via the heat dissipation rack 32. Specifically, the heat generated by the battery 31 during charging and discharging is transferred to the heat dissipation rack 32. Part of the heat conducted by the heat dissipation rack 32 is naturally dissipated, and the remaining heat is absorbed by the heat collection component. The heat collection component uses an active heat absorption method to absorb heat more quickly and efficiently. In order 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 affixed to the main frame 321 and connected to the water inlet. Specifically, when the electric water heater is turned on to produce hot water, the cold water input from the external water supply source first enters the cooling water pipe 33 through the water inlet pipe 101. The temperature of the cold water flowing through the cooling water pipe 33 is relatively low, and the heat generated when the battery 31 is discharged will heat the main frame 321. The high temperature difference can accelerate the heat transfer efficiency between the cold water and the main frame 321, thereby 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 and 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 used to preheat the water temperature of the water inlet pipe, preventing the battery temperature from being too high, extending the battery life, and at the same time improving the safety level of the battery and water heater, avoiding the waste of battery energy, realizing multi-level energy utilization, and improving the energy efficiency of the water heater. The cooling water pipe 33 is arranged on the main frame 321 in a reciprocating bending manner, and the overall structure is a serpentine coil structure, so as to increase the thermal contact area between the main frame 321 and the cooling water pipe 33 to accelerate the heat dissipation efficiency.

[0050] In order to conveniently install 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 body 321, and the cooling water pipe 33 is located in the pipe groove 3213, so that the contact area between the cooling water pipe 33 and the main frame body 321 is increased to improve the heat transfer efficiency, and meanwhile, the cooling water pipe 33 located in the pipe groove 3213 does not increase the overall thickness of the power storage module 3, so as to ensure the light and thin design. Alternatively, a sandwich structure can be formed in the main frame body 321, and the cooling water pipe 33 is located in the sandwich structure. The cooling water pipe 33 can uniformly absorb the heat released by the batteries 31 on both sides of the main frame body 321 in the sandwich structure, and the heat collecting assembly can further include a phase change heat storage material filled in the sandwich structure. The phase change heat storage material can effectively fill the entire sandwich structure to maximize the heat dissipation efficiency. During the charging process of the power storage module 3, the heat released by the batteries 31 can be collected by the phase change heat storage material, so that the heat released by the phase change heat storage material can be used to preheat the water in the cooling water pipe 33 during the starting stage of the electric water heater, so as to achieve the effect of quickly outputting hot water. The heat collecting assembly can collect the heat generated by the batteries 31 in the charging and discharging and equalization states, prevent the battery heat from being too high, prolong the service life of the battery, and improve the use safety level of the battery and the electric water heater. In addition, the battery 31 stores electric energy, and the battery 31 can realize power failure when discharging, which can more effectively improve the use safety, and the battery 31 can meet the high-power heating requirement without the need for heat preservation. Meanwhile, the phase change material changes the energy consumption into energy storage, multi-level utilization of energy, reduces the waste of energy, and does not need to be heated and supplemented and waited for use again.

[0051] II. In order to separate the water and electricity, the use reliability and safety of the battery are improved. As shown in Figures 1-3 The shell 1 is formed with a first installation cavity 100 and a second installation cavity 200; the electric heating module 2 is arranged in the first installation cavity 100, and the charging and discharging module 4 and the power storage module 3 are arranged in the second installation cavity 200. Specifically, the electric heating module 2 is used to heat water and is independently placed in the first installation cavity 100, and the charging and discharging module 4 and the power storage module 3 are arranged in the second installation cavity 200 to be isolated from the electric heating module 2. In the use process, even if water leakage occurs during the heating of water by the electric heating module 2, the water leaked from the electric heating module 2 will only flow into the first installation cavity 100, and will not affect the charging and discharging module 4 and the power storage module 3 in the second installation cavity 200, so as to avoid the short circuit of the charging and discharging module 4 or the power storage module 3 caused by water immersion.

[0052] In order to form two isolated installation cavities in the housing 1, a partition 11 can be provided in the housing 1. The partition 11 divides the interior of the housing 1 into a first installation cavity 100 and a second installation cavity 200. Specifically, the partition 11 is installed in the housing 1 to divide the internal space of the housing 1 into two parts and form the first installation cavity 100 and the second installation cavity 200. The partition 11 can be used to achieve water and electricity isolation. In the event of water leakage in the electric heating module 2, the water will be blocked by the partition 11 to prevent it from entering the second installation cavity 200. At the same time, in order to power the electric heating module 2 while meeting the water and electricity isolation requirements, a wiring hole (not marked) is provided on the partition 11. The electric heating module 2 is connected to the charging and discharging module 4 through a power supply cable (not shown). The power supply cable passes through the wiring hole. The wiring hole can be provided with a sealing ring or other structure to further effectively seal the gap between the power supply cable and the wiring hole, thereby 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, thereby preventing the heat of the electric heating module 2 from being transferred to the second installation cavity 200 and affecting the charging and discharging module 4 and the storage module 3.

[0053] When cooling water pipe 33 is used to dissipate heat from storage module 3, mounting holes (not marked) are provided on partition 11, through which cooling water pipe 33 passes. Similarly, a sealing ring or other structure may be provided in the mounting hole to further effectively seal the gap between cooling water pipe 33 and the mounting hole. The connection between cooling water pipe 33 and water inlet pipe 101 is located in first mounting cavity 100. Similarly, the connection between cooling water pipe 33 and electric heating module 2 is also located in first mounting cavity 100. The portion of cooling water pipe 33 located in second mounting cavity 200 is a complete pipe, thereby preventing leakage at the connection of cooling water pipe 33 from affecting charging and discharging module 4 and storage module 3 in second mounting cavity 200.

[0054] 3. In order to reduce the temperature fluctuation range of the output hot water during the process of heating water by the electric heating module 2. Figures 8-10As shown, the electric heating module 2 comprises a heating container 21 and an electric heating component, and the electric heating component can adopt an electric heating film 22. The heating container 21 comprises a base 211, an inner tube 212, an outer tube 213 and a plug 214. The base 211 is provided with a water inlet 2111 and a water outlet 2112. The inner tube 212 is installed on the base 211, and one tube opening of the inner tube 212 is communicated with the water inlet 2111. The outer tube 213 is sleeved outside the inner tube 212 and is installed on the base 211, and one tube opening of the outer tube 213 is communicated with the water outlet 2112. The plug 214 seals and blocks the other tube opening of the outer tube 213. A plurality of electric heating films 22 can be arranged outside the outer tube 213 along the axial direction. Specifically, in actual use, water enters the outer tube 213 through the water inlet 2111 of the base 211. The electric heating film 22 heats the water outside the outer tube 213 during the water flowing in the outer tube 213. The water flows along the outer tube 213 to form hot water and enters the inner tube 212, and the water flowing in the inner tube 212 is wrapped by the water flowing in the outer tube 213. In this way, the heat emitted by the water flowing in the inner tube 212 is absorbed by the water flowing in the outer tube 213, effectively reducing heat loss and improving heating efficiency. In addition, the inner tube 212 and the outer tube 213 are installed through the base 211, and the water flow sandwiched between the inner tube 212 and the outer tube 213 constitutes a water inlet channel, and the inner tube 212 constitutes a water outlet channel. The water flowing in the water outlet channel is wrapped by the water flowing in the water inlet channel. The water flowing in the inner tube 212 exchanges heat with the water flowing in the outer tube 213 to a certain extent, thereby reducing the thermal deviation of the uplink and downlink water. Moreover, the inner and outer sleeve tube structure is adopted to avoid separately arranging a water inlet and outlet pipe, save space, and the inner tube 212 has a sandwiched space outside the wall. The heat loss emitted by the water flowing in the inner tube 212 is utilized to heat the water flowing in the sandwiched space between the inner tube 212 and the outer tube 213, thereby improving the thermal efficiency. The water output by the inner tube 212 is not directly heated by the electric heating film 22, which can effectively reduce the fluctuation of the output water temperature. The heating power can be adjusted by adjusting the discharge current of the power storage module 3 or adjusting the number of electric heating films 22 used, so as to rapidly heat the water to the user-set temperature.

[0055] Preferably, a support plate 215 is provided between the inner tube 212 and the outer tube 213. The support plate 215 can be used to securely mount the inner tube 212 in the outer tube 213, ensuring that the thickness of the water layer formed between the inner tube 212 and the outer tube 213 is uniform. The support plate 215 can be an annular structure, which is sleeved on the outside of the inner tube 212, with the outer edge of the support plate 215 resting on the inner tube wall of the outer tube 213. Multiple support plates 215 can be arranged along the axis of the inner tube 212 to effectively ensure that the distance between the inner tube 212 and the outer tube 213 remains unchanged. Alternatively, the support plate 215 can be a spiral structure as a whole, and the support plate 215 is spirally arranged around the outside of the inner tube 212, with the outer edge of the support plate 215 resting on the inner tube wall of the outer tube 213.

[0056] Furthermore, to reduce the occurrence of stratification between hot and cold water, the support plate 215 is used to disturb the water flowing in the outer tube 213, disrupting the boundary layer of the water flow, thereby rapidly promoting the mixing of the hot and cold water and further reducing the fluctuation of the outlet water temperature. Specifically, for the support plate 215 with an annular structure, multiple water holes (not labeled) are provided on the support plate 215. The turbulence of the water flowing in the outer tube 213 through the water holes achieves the purpose of mixing the hot and cold water. The support plate 215 can be arranged at an angle relative to the axis of the inner tube 212 to further guide the water flow and cause turbulence. For the support plate 215 with a spiral structure, it can itself guide the water flow to achieve the purpose of turbulence. The hollow structure provided on the surface of the support plate 215 can further enhance the turbulence effect. The turbulence effect of the support plate 215 can further reduce or prevent the film boiling of the water in the outer tube 213 due to excessive heating temperature. To maximize the use 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 wraps the entire heating container 21, reducing heat loss from the electric heating film 22, improving thermal energy utilization, and reducing energy consumption. Furthermore, a gap is formed between the opposite end of the inner tube 212 and the plug 214, effectively reducing water resistance caused by changes in the flow direction of the water.

[0057] Based on the above technical solution, there are also various ways to connect the battery 31. Depending on the supply voltage output by the storage module 3, the battery 31 can be connected to the corresponding circuit. For example, the storage module 3 can output high voltage electricity of 150V-222V to match the mains power supply, or the storage module 3 can output low voltage electricity, preferably 36V-48V, which is lower than the DC safety voltage of 120V for the human body. Specific details are as follows with reference to the accompanying drawings.

[0058] like Figure 2As shown, under the low-voltage power supply mode, the storage module 3 is used to store electrical energy and can output a low voltage of 36V-48V; the storage module 3 can be divided into multiple storage modules, each storage module includes multiple batteries 31 arranged in parallel to meet the storage module 3 output a larger current, and multiple storage modules are arranged in series to achieve an output voltage of 36V-48V, ultimately meeting the requirements of high-power water heating, the charge and discharge module 4 controls the output current of the storage module 3 to uniformly control the power on and heating of each electric heating component in the electric heating module, and the battery discharge unit of the charge and discharge module 4 can be configured with multiple electronically controlled switches, each electronically controlled switch is used to connect the corresponding electric heating component and control the power on and off of the electric heating component. During the actual heating process, on the one hand, the heating power can be adjusted by controlling the output current of the storage module 3, and on the other hand, the heating power can be adjusted by controlling the power on and off of the corresponding electric heating component through the electronically controlled switch, wherein the electronically controlled switch can adopt a relay or an insulated gate bipolar transistor.

[0059] Similarly, for low voltage power supply, the battery 31 can be connected in series first and then in parallel, such as Figure 11 As shown, each storage module includes multiple batteries 31 arranged in series, so that the storage module can output a voltage of 36V-48V, and multiple storage modules are arranged in parallel to meet the storage module 3 to output a larger current to meet the high power requirement. Each storage module independently supplies power to the corresponding electric heating component. Correspondingly, the charging and discharging module 4 includes: multiple charging and discharging electronic modules 41, which are used to control the charging and discharging of the corresponding storage module. The charging and discharging electronic modules are also equipped with corresponding charging units and discharging units. The performance entity of the charging and discharging electronic modules is not restricted here. In addition, for the method of first connecting the batteries 31 in series and then in parallel, in order to simplify the connection process, as shown in FIG. Figure 7 As shown, multiple charging and discharging electronic modules 41 are respectively provided on both sides of the main frame 321, and the multiple charging and discharging electronic modules located on the same side of the main frame 321 are arranged in sequence along the longitudinal direction, and a plurality of threading holes 3214 are provided in the middle of the main frame 321 along the longitudinal direction; wherein, for multiple batteries 31 in the same storage module, they are located on the same side of the threading hole 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 in sequence, and the batteries 31 located on the back of the main frame 321 are connected in series in sequence, and the batteries 31 on the front of the main frame 321 near the threading hole 3214 are connected in series with the batteries 31 on the back of the main frame 321 near the threading hole 3214 through a wire passing through the threading hole 3214, and the two batteries 31 on the front and back of the main frame 321 near the corresponding charging and discharging electronic module 41 are connected to the charging and discharging electronic module 41.

[0060] like Figure 12As shown, under the high-voltage power supply mode, the storage module 3 outputs a high voltage of 150V-222V. For this purpose, the storage module 3 can be divided into a plurality of storage modules, and each storage module includes a plurality of storage batteries 31 arranged in parallel, and a plurality of storage modules are arranged in series to meet the output of a high voltage of 150V-222V. In this way, the storage module adopts a plurality of storage batteries 31 arranged in parallel to obtain a sufficiently large output current, and a plurality of storage modules are arranged in series to obtain a high voltage; preferably, in order to more effectively improve the overall heating power, the electric water heater can also be configured with an external power supply discharge module 6, the external power supply discharge module 6 is used to connect the external power supply and power the remaining electric heating components. Specifically, in the conventional heating mode, the electric energy supplied by the storage module 3 can meet the heating requirements of the electric heating module 2. When more power is needed to output more hot water, the external power supply discharge module 6 will provide auxiliary power to increase the heating power. The external power supply discharge module 6 is connected to the mains and converts the mains into a voltage value that is the same as the output voltage of the storage module 3, and together supplies power to the electric heating module 2. The performance entity of the external power supply discharge module 6 can refer to 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, and each heating container is correspondingly configured with an electric heating component, wherein the electric heating component on one heating container 21 is powered by the power storage module 3, while the electric heating component on the other heating container 21 can be powered by the external power supply discharge module 6; or, all the electric heating components on one heating container 21 are powered by the power storage module 3, while part of the electric heating components on the other heating container 21 are powered by the power storage module 3, and the remaining electric heating components are powered by the external power supply discharge module 6. When the electric heating components on the heating container 21 are powered by high voltage electricity, in order to improve safety and reliability, a fixing seat (not shown) is provided in the outer shell 1, and the heating container 21 is mounted on the fixing seat. A clamp is connected to the fixing seat by bolts, and the heating container 21 is clamped between the clamp and the fixing seat. An insulating partition is provided between the heating container 21 and the clamp and the fixing seat, and the insulating partition is used to achieve the insulated installation of the electric heating module 2 on the outer shell 1. As for Figure 12 As for the power storage module 3, it can also output a voltage of 36V-48V. At this time, high voltage electricity and low voltage electricity are mixed for power supply. In this case, all the electric heating components on one heating container 21 are powered by the power storage module 3, while all the electric heating components on the other heating container 21 are powered by the external power supply discharge module 6.

[0061] In the case of using two heating containers 21, Figure 13As shown, two heating containers 21 are arranged side by side, and the two heating containers 21 are connected by a connecting water pipe 23. A wiring pipe 24 is provided between the two heating containers 21. The power supply cable passes through the wiring pipe 24 and is electrically connected to the electric heating component on the corresponding heating container 21. The storage module 3 supplies power to the corresponding electric heating component through the corresponding power supply cable, and the external power supply discharge module 6 supplies power to the corresponding electric heating component through the corresponding power supply cable. The two ends of the connecting water pipe 23 form an arc-shaped elbow structure, and the connecting water pipe 23 extends along the outside of the wiring pipe 24. The wiring pipe 24 can protect the power supply cable to reduce the impact of the heat released by the electric heating component on the power supply cable. At the same time, the area between the two heating containers 21 is used to install the wiring pipe 24 and the connecting water pipe 23 to effectively reduce the space occupied by the electric heating module 2.

[0062] Based on the above technical solution, in order to accurately control the water temperature, the electric water heater further comprises: a flow sensor for detecting the water inflow or outflow of the electric heating module 2; a first temperature sensor for detecting the water inflow temperature of the water inlet 2111; a second temperature sensor for detecting the water outflow temperature of the water outlet 2112; and a controller 5 for controlling the operation of the charge-discharge module 4 according to the 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 water outflow of the electric water heater, the first temperature sensor detects the inflow water temperature, the second temperature sensor detects the outflow hot water temperature, and the controller controls the action of the charge-discharge module 4 to adjust the power supply of the power storage module 3 according to the user-set required water outflow temperature value and the detected water flow and water temperature. The specific control method is: after setting the water outflow temperature, when the flow sensor detects the water flow, the required heating energy is calculated according to the inflow water temperature detected by the first temperature sensor and the water flow detected by the flow sensor, so as to control the power storage module 3 to supply power to the electric heating module 2 to heat water. Specifically, under the condition that the inflow water temperature, water flow and required water outflow temperature information are known, the required heating energy can be calculated according to the temperature difference between the inflow water temperature and the user-set temperature and the water flow value, and the required heating power is converted according to the required heating energy, so as to control the power storage module 3 to discharge, and the controller 5 further adjusts the charge-discharge module 4 according to the water outflow temperature value detected by the second temperature sensor, so that the power storage module discharges more reasonably to heat, so that the temperature difference of the water outflow temperature is within ±1℃, thereby effectively improving the user experience. According to the temperature signal fed back by the second temperature sensor, if the temperature value detected by the second temperature sensor is less than the set water outflow temperature, the discharge power of the power storage module is increased; if the temperature value detected by the second temperature sensor is greater than the set water outflow temperature, the discharge power of the power storage module is reduced. Preferably, in the case of using an external power supply discharge module 6 for auxiliary power supply, if the temperature value detected by the second temperature sensor is less than the set water outflow temperature when the battery is at the maximum discharge power, the external power supply discharge module is started to assist the electric heating module to supply power to heat water.

[0063] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed by the present application.

Claims

1. An electric water heater, characterized in that: include: A housing, an electric heating module, a power storage module, and a charge-discharge module, wherein the electric heating module, the power storage module, and the charge-discharge module are installed in the housing; The electric heating module is provided with a water inlet and a water outlet, and is used to heat cold water input from the water inlet and output hot water from the water outlet; The charging and discharging module is used to control the charging of the power storage module and is also used to control the discharging of the power storage module to supply power to the electric heating module; The power storage module includes: a plurality of storage batteries for storing electrical energy; a heat dissipation rack, the heat dissipation rack being used to mount the battery and dissipate heat released by the battery; Wherein, the battery is thermally connected to the heat dissipation frame; The heat dissipation frame includes a main frame, a second connecting frame and a third connecting frame. The main frame is provided with a mounting groove, and the battery is installed in the corresponding mounting groove. The battery can be limited in the mounting groove by the bottom and two sides of the mounting groove. The main frame is also provided with a plurality of first card interfaces and a plurality of through holes. A positioning plate is also provided in the mounting groove, and the positioning plate is used to position the end surface of the battery provided with two electrodes; The second connecting frame is provided with a plurality of second card interfaces, and the third connecting frame is provided with a plurality of second card connectors; The main frame is located between the second connecting frame and the third connecting frame, the second card connector is inserted into the second card interface through the corresponding through-hole, 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.

2. The electric water heater according to claim 1, characterized in that The surface of the battery is abutted against the heat dissipation frame via heat-conducting adhesive.

3. The electric water heater according to claim 2, characterized in that: The battery is flat as a whole, and the back of the battery is abutted against the heat sink via heat-conducting adhesive.

4. The electric water heater according to claim 1, characterized in that The second snap-fit ​​connector is in a plate-like structure as a whole. The free ends of the plate-like structure are respectively provided with raised elastic cards. The elastic cards of the second snap-fit ​​connector are clamped on the second card interface.

5. The electric water heater according to claim 1, characterized in that The free ends of the second clamping connectors are respectively provided with clamping claws.

6. The electric water heater according to claim 1, characterized in that Also includes: A cooling water pipe is placed against the heat dissipation frame.

Images