WO2020199262A1

WO2020199262A1 - Electrical heating module and electrical heater

Info

Publication number: WO2020199262A1
Application number: PCT/CN2019/083549
Authority: WO
Inventors: 孙强; 盛保敬; 王翠苹; 赵龙; 董玮利
Original assignee: 青岛经济技术开发区海尔热水器有限公司; 海尔智家股份有限公司
Priority date: 2019-04-02
Filing date: 2019-04-19
Publication date: 2020-10-08
Also published as: CN111765622A

Abstract

An electrical heating module (2) and an electrical heater. The electrical heating module (2) comprises a heating container (21). The heating container (21) comprises: a base (211), the base (211) being provided with a water inlet (2111) and a water outlet (2112); an inner tube (212), the inner tube (212) being mounted on the base (211), one tube opening of the inner tube (212) being communicated with the water inlet (2111); an outer tube (213), the outer tube (213) being sleeved on the outer side of the inner tube (212) and mounted on the base (211), one tube opening of the outer tube (213) being communicated with the water outlet (2112); a stopper (214), the stopper (214) sealably blocking the other tube opening of the outer tube (213); and at least one electrical heating film (22), the electrical heating film (22) being provided on the outer tube (213).

Description

Electric heating module and electric water heater

Technical field

The invention belongs to the technical field of household appliances, and in particular relates to an electric heating module and an electric water heater.

Background technique

At present, water heaters are commonly used household appliances in people’s daily life. 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 due to their convenience. In some technologies, electric water heaters usually use electric heating rods for heating, and the temperature of the water near the electric heating rods is too high, which leads to large fluctuations in the temperature of the outlet water, resulting in poor user experience.

technical problem

How to design an electric water heater with small water outlet temperature fluctuations to improve user experience is a technical problem to be solved by the present invention.

Technical solutions

In view of the above-mentioned technical problems in the prior art, the present invention provides an electric heating module and an electric water heater, so as to achieve small fluctuations in the temperature of the outlet water of the electric heating module to improve user experience.

To achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solutions to achieve:

The present invention provides an electric heating module, including:

A heating vessel, the heating vessel including a base, an inner tube, an outer tube and a plug;

The base is provided with a water inlet and a water outlet;

The inner tube is installed on the base, and a nozzle of the inner tube is in communication with the water inlet;

The outer tube is sleeved on the outside of the inner tube and installed on the base, and a nozzle of the outer tube is in communication with the water outlet;

The plug seals and blocks the other nozzle of the outer tube;

At least one electric heating film, the electric heating film being arranged on the outer tube.

Further, it also includes: a support plate sandwiched between the inner tube and the outer tube.

Further, the support plate has an annular structure, the support plate is sleeved outside the inner tube, and the outer edge of the support plate abuts against the inner tube wall of the outer tube.

Further, a plurality of water holes are provided on the supporting plate.

Further, the support plate is arranged obliquely with respect to the axis of the inner tube.

Further, the supporting plate has a spiral structure as a whole, the supporting plate is spirally arranged around the outside of the inner tube, and the outer edge of the supporting plate abuts against the inner tube wall of the outer tube.

Further, the surface of the support plate is provided with a hollow structure.

Further, it also includes: a heat preservation layer, which is wrapped around the outside of the heating container.

Further, a gap is formed between the nozzle of the inner tube opposite to the plug and the plug.

The present invention also provides an electric water heater, including:

An electric heating module, the electric heating module adopts the electric heating module;

An electric storage module for storing electric energy;

A charging and discharging module, the charging and discharging module is used to control the electric storage module to charge, and is also used to control the electric storage module to discharge to supply power to the electric heating module.

Beneficial effect

Compared with the prior art, the advantages and positive effects of the present invention are: by increasing the use of an inner tube-in-tube structure, cold water flows in the outer tube first, and an electric heating film arranged outside the outer tube heats the flowing water, and The heated water flows into the inner tube and is finally output. The output hot water is directly heated without the electric heating film, which can avoid excessive fluctuations in the temperature of the outlet water, and achieve small fluctuations in the outlet temperature of the electric heating module to improve user experience.

Description of the drawings

Figure 1 is a schematic structural view of an embodiment of an electric water heater of the present invention;

Figure 2 is one of the device distribution diagrams inside the housing of the electric water heater embodiment of the present invention;

Figure 3 is one of the structural schematic diagrams of the electric storage module in the embodiment of the electric water heater of the present invention;

Fig. 4 is a partial enlarged schematic diagram of area A in Fig. 3;

Fig. 5 is the second structural diagram of the electric storage module in the embodiment of the electric water heater of the present invention;

Fig. 6 is a partial enlarged schematic diagram of area B in Fig. 5;

Figure 7 is a schematic structural diagram of the main frame of the electric water heater embodiment of the present invention;

Figure 8 is one of the structural schematic diagrams of the electric heating module in the embodiment of the electric water heater of the present invention;

9 is a cross-sectional view of the electric heating module in the embodiment of the electric water heater of the present invention;

Fig. 10 is a partial structural diagram of an electric heating module in an embodiment of an electric water heater of the present invention;

Figure 11 is the second distribution diagram of components inside the housing of the electric water heater of the embodiment of the present invention;

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

Fig. 13 is the second structural diagram of the electric heating module in the embodiment of the electric water heater of the present invention.

The best mode of the invention

As shown in Figures 1 to 2, the water heater of this embodiment includes: a housing 1, an electric heating module 2, an electric storage module 3, a charging and discharging module 4, and a controller 5. Among them, the electric heating module 2, the electric storage module 3, the charging The discharge 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 (such as a tap water pipe) for introducing cold water, and the water outlet pipe 102 is Used to output hot water. In actual use, the charging and discharging module 4 can control the charging and discharging of the electric storage module 3, and use the electric energy released by the electric storage module 3 to supply the electric heating module 2 for heating, and the external water supply is delivered to the electric heating module 2 The water is quickly heated by the electric heating module 2 to achieve the purpose of instant water supply. Normally, the water heater will be equipped with a temperature sensor for detecting temperature and a flow sensor for detecting water flow, and the controller 5 will set parameters and The signals detected by the relevant sensors control the operation of the charging and discharging module 4. Among them, the basic functions of the above modules are explained: the electric heating module 2 usually includes a heating container and electric heating components. The heating container has a water inlet and a water outlet. The water delivered by the water supply source passes through the water inlet pipe 101 and enters the heating container from the water inlet. The electric heating component obtains electric energy to heat the water flowing in the heating container. The hot water formed by heating is output from the water outlet of the heating container and delivered to the outside through the water outlet pipe 102. The electric heating component can be an electric heating tube or an electric heating film. Electric heating devices; the storage module 3 uses several storage batteries to store electrical energy. The storage batteries can use existing common battery types, such as lithium batteries or nickel-cadmium batteries. This embodiment does not limit the specific forms of batteries; The discharging module 4 usually has a battery charging unit and a battery discharging unit. The battery charging unit is connected to the mains to charge the battery as needed, while the battery discharging unit is connected to the electric heating component, and the electric energy released by the battery is passed through the battery discharging unit It is applied to the electric heating component to supply power to the electric heating component. The battery charging unit and the battery discharging unit can adopt the conventional battery charging circuit and battery discharging circuit form, which is not limited here; the controller 5 is the main control component and can To 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 set on the circuit board, and because the battery is used for power supply, the controller 5 can also be equipped with a battery management system (English: Battery Management System, abbreviated BMS), uses the battery management system to monitor the battery, for example, to accurately estimate the state of charge of the power battery pack (State of Charge, or SOC), that is, the remaining battery power. During the charging and discharging process, the voltage, temperature, current and other parameters of each battery are collected in real time to prevent overcharging or overdischarging, and the single battery is evenly charged to make Each battery in the power storage module achieves functions such as a balanced and consistent state. In addition, the controller 5 may also be equipped with a display screen or a display touch screen for the user to view the operating state of the electric water heater.

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

1. In order to meet the requirements of battery heat dissipation, to improve the reliability and safety of the battery. As shown in Figures 1-7, the power storage module 3 includes several batteries 31 and a heat dissipation frame 32. The heat dissipation frame 32 is used to install the battery 31 and dissipate the heat released by the battery 31; the battery 31 is thermally connected to the heat dissipation frame 32 . Specifically, on the one hand, the heat dissipation frame 32 is used to install and fix multiple batteries 31 to facilitate later unified assembly; on the other hand, the heat dissipation frame 32 has the function of dissipating heat from the batteries 31, and the heat dissipation frame 32 can be made of thermally conductive materials. , Such as aluminum or copper and other metals with good thermal conductivity.

In order to improve the heat transfer efficiency between the battery 31 and the heat dissipation frame 32, the battery 31 is pasted on the heat dissipation frame 32 with a thermally conductive glue. Specifically, when the battery 31 is assembled to the heat dissipation frame 32, the battery 31 31 is bonded to the heat sink 32. On the one hand, thermal adhesive can be used to bond the battery 31 to the heat sink 32 easily and quickly during the factory assembly process to improve assembly efficiency. On the other hand, the thermal adhesive can Play the role of rapid heat transfer. The heat generated by the battery 31 is quickly transferred to the heat dissipation frame 32 through the thermal conductive glue to improve the heat transfer efficiency of the battery 31. In this way, the heat dissipation frame 32 can be used to quickly absorb the heat generated by the battery 31 To achieve efficient heat dissipation.

In order to increase the contact area, the battery 31 has a flat structure as a whole. The back of the battery 31 is attached to the heat sink 32 through a thermally conductive glue. The battery 31 has a rectangular parallelepiped structure. The size of the battery 31 in the thickness direction is the smallest. After the back of the device is bonded to the heat dissipation frame 32 with thermally conductive adhesive, the thickness of the overall device can be ensured to be thin, and a light and thin design can be realized in a true sense. Preferably, in order to make full use of the front and back space of the heat sink 32 to install more batteries 31, the batteries 31 can be attached to the front and back of the heat sink 32 respectively to increase the number of batteries 31 in the overall equipment, thereby effectively increasing Large output power.

Preferably, in order to install the battery 31 more reliably, the heat dissipation frame 32 includes a main frame body 321 with a mounting groove 3211 provided on the main frame body 321, and the battery 31 is installed in the corresponding mounting groove 3211 through thermally conductive glue. Specifically, the main frame 321 is made of a thermally conductive material (such as aluminum or copper) to ensure that the main frame 321 has good heat conduction and heat dissipation capabilities, and the mounting groove 3211 formed on the main frame 321 can be independent A single battery 31 is installed, and at the same time, the battery 31 in the mounting groove 3211 can be restricted by the bottom and two sides of the mounting groove 3211 to improve assembly reliability. In this way, in the later transportation and use process, on the one hand, the battery 31 is firmly confined in the installation groove 3211, which can ensure the safety and reliability of the battery 31 during transportation, and on the other hand, the battery 31 will not be squeezed between each other. The impact is more conducive to improving the safety and reliability of use. Wherein, the mounting groove 3211 is also provided with a positioning plate 3212. The positioning plate 3212 is used to position the end surface of the battery 31 with two electrodes. The positioning plate 3212 is located between the two electrodes and can be used for the vertical and horizontal directions of the battery 31. Limit position to further improve assembly reliability.

In addition, in order to further improve the assembly reliability of the battery 31 and avoid the occurrence of the battery 31 falling off during transportation, the main frame body 321 is also provided with a connecting frame, and the connecting frame is used to snap onto the main frame body 321. The connecting frame will abut against the front of the battery 31 so that the battery 31 is sandwiched between the connecting frame and the main frame body 321. Specifically, during the assembly process, after the battery 31 is bonded to the main frame 321 with a thermally conductive glue, the battery 31 is confined in the mounting groove 3211 through the connecting frame from the outside of the battery 31, relying on the mounting groove 3211. Under the restriction of the positioning plate 3212 and the connecting frame, the storage battery 31 can be restricted in all directions. However, since multiple batteries 31 are arranged in an array on the main frame body 321, the batteries 31 located in the same row or the same row can be uniformly positioned and installed through the connecting frame, which more effectively improves the overall assembly efficiency.

The structure of the above-mentioned connecting frame differs according to the different assembly methods of the battery 31 and the main frame 321, specifically: for the case where the battery 31 is installed on the front or back of the main frame 321, the main frame 321 is also A plurality of first card interfaces are provided; the heat dissipation frame 32 further includes: a first connecting frame on which a plurality of first snap-on connectors are provided; wherein, the first snap-on connector is snapped on the first card In the interface, the battery 31 is sandwiched between the main frame body 321 and the first connecting frame. Specifically, when the battery 31 is installed on a surface of the main frame body 321, the battery 31 is bonded to the main frame body by a thermally conductive adhesive. After the 321 is mounted, the first snap connection piece is directly snapped into the first card interface of the main frame 321 to complete the assembly of the first connection frame, and the battery 31 is clamped between the first connection frame and the main frame 321 Therefore, it can be ensured that the battery 31 will not fall out of the mounting groove 3211.

Similarly, when the battery 31 is provided on the front and back of the main frame 321, a plurality of through holes 3210 are also provided on the main frame 321; the heat dissipation frame 32 includes: a second connecting frame 322, The connecting frame 322 is provided with a plurality of second card interfaces (not marked); the third connecting frame 323 is provided with a plurality of second card connectors 3231; the main frame 321 is located in the second Between the connecting frame 322 and the third connecting frame 323, the second clamping connection piece 3231 passes through the corresponding through hole 3210 and is clamped in the second card interface. Part of the storage battery 31 is clamped between the main frame 321 and the second connecting frame 322. In between, the remaining part of the storage battery 31 is sandwiched between the main frame body 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 the thermally conductive glue, the second snap connection 3231 passes through the through hole 3210 from one side of the main frame 321 and is snapped into the second In the card interface, at this time, the second connecting frame 322 and the third connecting frame 323 are both close to the front of the battery 31, so that the battery 31 is fastened.

For the first and second snap connectors 3231 described above, in order to realize the snapping function, taking the second snap connector 3231 as an example, the card of the second snap connector 3231 can be The connecting end forms a claw, and the claw is clamped into the second card interface to realize the clamping connection. Alternatively, the second snap connection 3231 has a plate-like structure as a whole, and the free ends of the plate-like structure are respectively provided with a raised elastic card 3232, the elastic card 3232 passes through the second card interface and is stuck on the edge of the second card interface Specifically, the elastic card 3232 is cut and bent directly to form the elastic card 3232 on the free end of the second snap connection 3231, and the free end of the second snap connection 3231 can be on both sides respectively. The elastic card 3232 is formed, and the tilting directions of the elastic cards 3232 on both sides are set back, so that after inserting the free end of the second card connection member 3231 into the second card interface, the elastic card 3232 is compressed first Enter 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 on the edge of the second card interface.

Further, in order to more effectively dissipate the battery 31, the power storage module 3 further includes a heat collection component, which is used to collect the heat released by the battery 31 through heat transfer through the heat dissipation frame 32. Specifically, the heat generated during the charging and discharging process of the battery 31 is transferred to the heat dissipation frame 32, part of the heat conducted by the heat dissipation frame 32 is naturally dissipated, and the remaining part of the heat is absorbed by the heat collection component, which adopts an active heat absorption method. It can absorb heat more quickly and efficiently. In order to make full use of the heat generated by the battery 31 to heat the water, the heat collection assembly includes: a cooling water pipe 33 which is attached to the main frame 321 and connected to the water inlet. Specifically, in the process of turning on the electric water heater 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 low, and the battery 31 is discharged when the battery 31 is discharged. The heat will heat the main frame 321, and 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 In the process, the cold water is heated by the heat released by the battery 31, so that the power consumption of the electric heating module 2 can be reduced, so as to reduce energy consumption and increase the hot water output rate and output; the heat generated during the discharge is used to preheat the water inlet pipe The water temperature can prevent the battery temperature from being too high, prolong the service life of the battery, improve the safety level of the battery and the water heater, avoid the waste of battery energy, realize the multi-level utilization of energy, and improve the energy efficiency of the water heater. The cooling water pipe 33 is reciprocally bent and arranged on the main frame body 321 and has a serpentine coil structure as a whole to increase the thermal contact area with the main frame body 321 to accelerate the heat dissipation efficiency.

Among them, in order to facilitate the installation of the cooling water pipe 33, a pipe groove 3213 matching the extending direction of the cooling water pipe 33 may be formed on the front or back of the main frame 321, and the cooling water pipe 33 is located in the pipe groove 3213, so that the cooling water pipe 33 and The contact area between the main frames 321 is increased to improve the heat transfer efficiency, and at the same time, the cooling water pipe 33 is located in the pipe groove 3213 without increasing the overall thickness of the power storage module 3 to ensure a thin and light design. Alternatively, a sandwich structure may be formed in the main frame 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 321 in the sandwich structure, and the heat collection assembly It may also include a phase change heat storage material. The phase change heat storage material is filled in the sandwich structure. The phase change heat storage material can effectively fill the entire sandwich structure to maximize heat dissipation efficiency. In addition, during the charging process of the power storage module 3, the heat released by the battery 31 can be collected by the phase-change heat storage material. In this way, the heat released by the phase-change heat storage material can be used to preheat the cooling water pipe 33 during the startup phase of the electric water heater. In order to achieve the effect of rapid output of hot water. The heat collection component can collect the heat generated in the charging and discharging and equilibrium state of the battery 31 to prevent excessive heat of the battery, prolong the service life of the battery, and improve the safety level of the battery and electric water heater. In addition, the battery 31 is used to store electric energy. When 31 is discharged, the mains can be cut off, which can effectively improve the safety of use. Moreover, the battery 31 can meet the requirements of high-power heating without heat preservation. At the same time, the phase change material is used to convert energy consumption into energy storage, and the energy is used in multiple stages to reduce The waste of energy is eliminated, and there is no need for heating supplement and waiting when used again.

2. In order to meet the separation of water and electricity, to improve the reliability and safety of the battery. As shown in Figures 1 to 3, the housing 1 is formed with a first installation cavity 100 and a second installation cavity 200; wherein, the electric heating module 2 is arranged in the first installation cavity 100, and the charge and discharge module 4 and the storage The electric module 3 is disposed 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, while the charge and discharge module 4 and the electric storage module 3 are installed in the second installation cavity 200 to achieve isolation from the electric heating module 2. Arrangement, during use, even if there is water leakage 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 second installation. The charging and discharging module 4 and the electric storage module 3 in the cavity 200 affect the charging and discharging module 4 or the electric storage module 3 from being soaked in water and causing a short circuit.

In order to form two isolated installation cavities in the housing 1, a partition 11 may 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 to form a first installation cavity 100 and a second installation cavity 200. The partition 11 can be used to achieve water and electricity isolation. When the heating module 2 leaks, the water will be blocked by the partition 11 to avoid entering the second installation cavity 200. At the same time, in the case of satisfying water and electricity isolation, in order to realize power supply to the electric heating module 2, a wiring hole (not marked) is provided on the partition 11, and the electric heating module 2 is charged and discharged through a power supply cable (not shown). Module 4 is connected, the power supply cable passes through the wiring hole, and the wiring hole can be equipped with a structure such as a sealing ring to further effectively seal the gap between the power supply cable and the wiring hole, and further improve the sealing performance. In addition, the partition 11 may also be equipped with a heat insulation layer, so that during the power-on operation of the electric heating module 2, the heat released by the electric heating module 2 to the outside can be isolated by the partition 11 to avoid heat transfer from the electric heating module 2 The charging and discharging module 4 and the storage module 3 are affected in the second installation cavity 200.

In the case where the cooling water pipe 33 is used to dissipate the electricity storage module 3, a mounting hole (not marked) is provided on the partition 11, and the cooling water pipe 33 passes through the mounting hole. Similarly, the mounting hole can also be equipped with a sealing ring, etc. The structure further effectively seals the gap between the cooling water pipe 33 and the mounting hole. The connection part of the cooling water pipe 33 and the water inlet pipe 101 is located in the first installation cavity 100. Similarly, the connection part of the cooling water pipe 33 and the electric heating module 2 is also located in the first installation cavity 100 and in the second installation cavity. The part of the cooling water pipe 33 in the body 200 is a complete pipe body, so as to prevent water leakage at the connection part of the cooling water pipe 33 from affecting the charge and discharge module 4 and the storage module 3 in the second installation cavity 200.

3. In order to reduce the temperature fluctuation range of the output hot water when the electric heating module 2 heats the water. As shown in Figures 8-10, the electric heating module 2 includes a heating container 21 and an electric heating component, and the electric heating component may be an electric heating film 22. The heating container 21 includes a base 211, an inner tube 212, and an outer tube 213 And the 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, a nozzle of the inner tube 212 is connected with the water inlet 2111; the outer tube 213 is sleeved in the inner tube 212 The outer part of the outer tube 213 is installed on the base 211, and one nozzle of the outer tube 213 is connected to the water outlet 2112; the plug 214 seals and blocks the other nozzle of the outer tube 213; more than one nozzle can be arranged outside the outer tube 213 in the axial direction. One electric heating film 22. Specifically, in the actual use process, water enters the outer tube 213 through the water inlet 2111 of the base 211. When the water flows in the outer tube 213, the electric heating film 22 will heat the water outside the outer tube 213. The hot water flows along the outer tube 213 to form hot water and enters the inner tube 212. The water flowing through the inner tube 212 is surrounded by the water flowing in the outer tube 213. In this way, the water flowing in the inner tube 212 The emitted heat will be 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. The water flow interlayer formed between the inner tube 212 and the outer tube 213 constitutes an inlet channel, while the inner tube 212 constitutes an outlet channel, and the water flowing in the outlet channel is The water flowing in the water inlet channel is wrapped, and there is a certain heat exchange between the water flowing in the inner tube 212 and the water in the outer tube 213, so that the thermal deviation between the upward and downward water is reduced. In addition, the use of an inner and outer tube structure avoids setting up a separate water inlet and outlet pipe, saving space, and the outer wall of the inner tube is a sandwich space. The heat loss from the water flowing through the inner tube 212 is used to heat the inner tube 212 and the outer tube. The water interlayer of the tube 213 improves the thermal efficiency. The water output from 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. By adjusting the discharge current of the power storage module 3 or adjusting the number of electric heating films 22 used, the heating power can be adjusted so that the outlet water quickly rises to the user set temperature.

Preferably, a support plate 215 is also provided between the inner tube 212 and the outer tube 213. The support plate 215 can be used to stably install the inner tube 212 in the outer tube 213 to ensure the water flow formed between the inner tube 212 and the outer tube 213 The thickness of the interlayer is uniform. The support plate 215 can be a ring structure, the support plate 215 is sleeved outside the inner tube 212, the outer edge of the support plate 215 is against the inner tube wall of the outer tube 213, and multiple supports can be arranged along the axis of the inner tube 212. The plate 215 effectively ensures that the distance between the inner tube 212 and the outer tube 213 remains unchanged. Alternatively, the supporting plate 215 has a spiral structure as a whole, and the supporting plate 215 is arranged spirally around the outside of the inner tube 212, and the outer edge of the supporting plate 215 abuts against the inner tube wall of the outer tube 213.

In addition, in order to reduce the occurrence of cold and hot water stratification, the support plate 215 is used to disturb the water flowing in the outer pipe 213 to destroy the boundary layer of the water flow, so as to quickly promote the mixing of cold and hot water and further reduce the water output. The range of temperature fluctuations. Specifically, for the support plate 215 adopting the annular structure, a plurality of water holes (not marked) are provided on the support plate 215, and the water flowing in the outer tube 213 passes through the turbulence of the nozzle to mix the cold and hot water. The supporting plate 215 can be arranged obliquely with respect to the axis of the inner tube 212, so as to use the supporting plate 215 to further guide the water flow to cause turbulence. As for the supporting plate 215 of the spiral structure, it can guide the water flow to rotate to achieve the purpose of turbulence, and the surface of the supporting plate 215 is provided with a hollow structure, which can more effectively increase the turbulence effect. Under the turbulence of the support plate 215, the phenomenon of film boiling of the water in the outer tube 213 due to the excessive heating temperature can be further reduced or avoided. In order to maximize the use of the heat generated by the electric heating film 22 and reduce energy consumption, a heat preservation layer is also provided on the outside of the heating container 21, and the heat preservation layer is used to wrap the heating container 21 on the outside to reduce the generation of the electric heating film 22. The heat is lost to improve the utilization rate of heat energy and reduce energy consumption. At the same time, a gap is formed between the nozzle of the inner tube 212 and the plug 214 opposite to the plug 214, which can effectively reduce the water resistance caused by the change of the water flow direction.

Based on the above technical solutions, there are also many ways to connect the battery 31. According to the different power supply voltages output by the power storage module 3, the battery 31 can be connected to the corresponding circuit. For example, the power storage module 3 can output 150V-222V. The high voltage is matched with the mains electricity, or the storage module 3 can output low voltage of 120V lower than the safety voltage of direct current of the human body, preferably 36V-48V. The detailed description is given below in conjunction with the drawings.

As shown in Figure 2, in the low-voltage power supply mode, the storage module 3 is used to store electrical energy and can output a low-voltage voltage of 36V-48V; the storage module 3 can be divided into multiple storage modules, each Including a plurality of batteries 31 arranged in parallel to meet the large current output of the power storage module 3, and a plurality of power storage modules are arranged in series to achieve the output voltage of 36V-48V, and finally meet the requirements of high-power heating water. 4 Control the output current of the storage module 3 to uniformly control the energization and heating of each electric heating component in the electric heating module, and the battery discharge unit of the charging and discharging module 4 can be equipped with multiple electric control switches, and each electric control switch is used for connection Corresponding electric heating component and control the electric heating component to turn on and off. In the actual heating process, on the one hand, the output current of the storage module 3 can be controlled to adjust the heating power, on the other hand, it can also be controlled by an electronic control switch. The corresponding electric heating component is turned on and off to adjust the heating power, and the electric control switch can be a relay or an insulated gate bipolar transistor.

Similarly, for the low-voltage power supply mode, the battery 31 can be connected in series and then connected in parallel. As shown in FIG. 11, each power storage module includes a plurality of storage batteries 31 arranged in series, so that the power storage module Output 36V-48V And a plurality of power storage modules are set in parallel to meet the requirements of the power storage module 3 to output a larger current to meet the high power requirements, and each power storage module independently supplies power to the corresponding electric heating component, and the corresponding The charging and discharging module 4 includes: a plurality of charging and discharging electronic modules 41, the charging and discharging electronic module 41 is used to control the corresponding storage module to charge and discharge, wherein the charging and discharging electronic module is also equipped with corresponding charging and discharging units, There is no restriction on the performance entity of the charging and discharging electronic module. In addition, for the battery 31 in series and then in parallel, in order to simplify the connection process, as shown in FIG. 7, a plurality of charging and discharging electronic modules 41 are respectively provided on both sides of the main frame 321, which are located on the same side of the main frame 321. A plurality of charging and discharging electronic modules 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 the multiple batteries 31 in the same power storage module, they are located on the same side of the threading 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 serially connected in sequence, the batteries 31 located on the back of the main frame 321 are serially connected in sequence, and the front of the main frame 321 is close to the battery 31 passing through the threading hole 3214. The wire passes through the threading hole 3214 and is connected in series with the battery 31 on the back of the main frame 321 close to the threading hole 3214. The front and back of the main frame 321 are close to the two batteries 31 corresponding to the charging and discharging electronic module 41 and are connected to the charging and discharging electronic module 41 .

As shown in Figure 12, in the high-voltage power supply mode, the storage module 3 outputs high-voltage power of 150V-222V. For this reason, the storage module 3 can be divided into multiple storage modules, and each storage module includes A plurality of batteries 31 arranged in parallel, and a plurality of power storage modules are arranged in series to output a high voltage of 150V-222V. In this way, the power storage module uses a plurality of batteries 31 arranged in parallel to obtain a large enough output current, and Multiple power storage modules are arranged in series to obtain high voltage; preferably, in order to more effectively increase the overall heating power, the electric water heater can also be equipped with an external power discharge module 6, which is used to connect to an external power supply It also supplies power to 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, and when more power is required to output more hot water When the external power supply discharge module 6 will provide auxiliary power supply to increase the heating power, the external power supply discharge module 6 is connected to the mains and converts the mains power to the same voltage value as the output voltage of the storage module 3, and is used for the electric heating module 2 together. Power supply, and the performance entity of the external power discharging module 6 can refer to the discharge control device of a conventional mains-powered water heater, which is not limited here. Preferably, the electric heating module 2 can be configured with two heating containers 21, and each heating container is correspondingly equipped with an electric heating component. The electric heating component on one heating container 21 is powered by the power storage module 3, and the other The electric heating components on one heating container 21 can be powered by the external power discharge module 6; or, all the electric heating components on one heating container 21 are powered by the power storage module 3, and for the other heating container 21 Part of the electric heating components are supplied with power through the storage module 3, and the remaining part of the electric heating components are supplied with power through the external power discharge module 6. In the case where the electric heating components on the heating vessel 21 are powered by high-voltage electricity, in order to improve safety and reliability, a fixing seat (not shown) is provided in the housing 1, and the heating vessel 21 is installed on the fixing seat. The clamp is connected by bolts, the heating container 21 is clamped between the clamp and the fixing base, and an insulating partition is provided between the heating container 21, the clamp and the fixing base. The insulating partition is used to realize the insulation installation of the electric heating module 2 On the shell 1. As for the storage module 3 in Figure 12, it can also output a voltage of 36V-48V. At this time, high-voltage and low-voltage electricity are mixed for power supply. In this case, one of the electric heating components on the heating container 21 All of the power is supplied by the power storage module 3, and the electric heating components on the other heating container 21 are all supplied by the external power discharge module 6.

In the case of using two heating vessels 21, as shown in FIG. 13, the two heating vessels 21 are arranged side by side, and the two heating vessels 21 are connected by a connecting water pipe 23, and a wire conduit 24 is provided between the two heating vessels 21 , The power supply cable passes through the conduit 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 discharge module 6 supplies power through the corresponding The cables supply power to the corresponding electric heating components. 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 and reduce the heat released by the electric heating part of 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.

Based on the above technical solution, in order to accurately control the outlet water temperature, the electric water heater of this embodiment further includes: a flow sensor, which is used to detect the inlet or outlet flow of the electric heating module 2; the first temperature sensor is used for the first temperature sensor. The second temperature sensor, the second temperature sensor is used to detect the temperature of the water outlet 2112; the controller 5 is used to set the parameters according to the user and the flow sensor, the first temperature sensor and the second temperature sensor. The signal detected by the temperature sensor controls the operation of the charging and discharging module 4. Specifically, the flow sensor can be used to detect the water output of the electric water heater, the first temperature sensor detects the temperature of the incoming cold water, the second temperature sensor detects the temperature of the output hot water, and the controller combines the output temperature value set by the user. Use the detected water flow and water temperature to precisely control the actions of the charging and discharging module 4 to adjust the power supply of the storage module 3. The specific control method is: after setting the outlet water temperature, when the flow sensor detects the water flow, according to the first The inlet water temperature detected by the temperature sensor and the water flow detected by the flow sensor are used to calculate the amount of heat required to heat the water, so as to control the power storage module 3 to supply power to the electric heating module 2 to heat the water. Specifically, when the information of the inlet water temperature, the water flow and the required outlet water temperature is known, the required heat can be calculated according to the temperature difference between the inlet water temperature and the user set temperature and the water flow value, and The required heating power is converted according to the required heat to control the discharge of the storage module 3, and the controller 5 further adjusts the charging and discharging module 4 according to the temperature value of the outlet water detected by the second temperature sensor to make the storage The module is more reasonable to discharge and heat, and the temperature difference of the outlet water temperature is within ±1℃, which effectively improves 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 temperature, the discharge power of the storage module is increased; if the temperature value detected by the second temperature sensor is greater than the set temperature When the outlet water temperature, reduce the discharge power of the storage module. Preferably, when the external power supply discharge module 6 is used for auxiliary power supply, when the battery is at the maximum discharge power, if the temperature value detected by the second temperature sensor is less than the set water temperature, the external power discharge module auxiliary is started Supply power to the electric heating module to heat water.

Claims

An electric heating module, characterized in that it comprises:

A heating vessel, the heating vessel including a base, an inner tube, an outer tube and a plug;

The base is provided with a water inlet and a water outlet;

The inner tube is installed on the base, and a nozzle of the inner tube is in communication with the water inlet;

The outer tube is sleeved on the outside of the inner tube and installed on the base, and a nozzle of the outer tube is in communication with the water outlet;

The plug seals and blocks the other nozzle of the outer tube;

At least one electric heating film, the electric heating film being arranged on the outer tube.

2. The electric heating module according to claim 1, further comprising:

A support plate, which is sandwiched between the inner tube and the outer tube.

3. The electric heating module according to claim 2, wherein the support plate has a ring structure, the support plate is sleeved on the outside of the inner tube, and the outer edge of the support plate abuts against the On the inner tube wall of the outer tube.

4. The electric heating module according to claim 3, wherein a plurality of water holes are provided on the support plate.

5. The electric heating module according to claim 4, wherein the support plate is arranged obliquely with respect to the axis of the inner tube.

6. The electric heating module according to claim 2, wherein the supporting plate has a spiral structure as a whole, and the supporting plate is arranged spirally around the outer part of the inner tube, and the outer edge of the supporting plate abuts against On the inner tube wall of the outer tube.

7. The electric heating module according to claim 2, wherein the surface of the support plate is provided with a hollow structure.

8. The electric heating module according to claim 1, further comprising:

An insulation layer, the insulation layer is wrapped around the outside of the heating container.

9. The electric heating module of claim 1, wherein a gap is formed between the nozzle of the inner tube and the plug opposite to the plug and the plug.

10. An electric water heater, characterized in that it comprises:

An electric heating module, the electric heating module adopts the electric heating module according to any one of claims 1-9;

An electric storage module for storing electric energy;

A charging and discharging module, the charging and discharging module is used to control the electric storage module to charge, and is also used to control the electric storage module to discharge to supply power to the electric heating module.