Blade type heat storage device and electric water heater

Abstract

The utility model discloses a blade type heat storage device and an electric water heater, the electric water heater is installed in the blade type heat storage device, the blade type heat storage device comprises a plurality of independent heat storage units arranged side by side, and each heat storage unit comprises a liquid passing heat exchange mechanism, a heat storage material and a first heating mechanism; the first heating mechanism at least heats part of the heat storage material, and the heat storage material stores heat energy; at least part of the liquid passing heat exchange mechanism makes contact with the heat storage material, water is injected into the liquid passing heat exchange mechanism, the water exchanges heat with the heat storage material through the liquid passing heat exchange mechanism, and the water is heated. According to the electric water heater, after one or more heat storage units in the blade type heat storage device break down, normal work and normal heat exchange work of other heat storage units are not affected, the blade type heat storage device can be used, and the electric water heater can work normally.

Description

Technical Field

[0001] The utility model relates to the field of electric water heaters, in particular to a blade type heat storage device and an electric water heater. Background Art

[0002] Traditional electric water heaters are relatively large in size, which is not conducive to installation in small households. In addition, they consume a lot of electricity. In order to solve the above problems, phase change electric water heaters were invented.

[0003] Phase change electric water heater is a water heater that uses phase change material (PCM) to store and release heat energy. By using phase change material, when electricity consumption is low, the electric energy is converted into heat and stored in the phase change material, which effectively reduces the electricity bill. At the same time, the specific heat capacity of the phase change material is 3 times that of water, which can effectively reduce the overall volume and achieve the hot water capacity of the original volume.

[0004] In the prior art, with the widespread use of phase change electric water heaters, some specific defects have been found. For example, due to the circulation of phase change materials inside the phase change water heater, there are relatively complex pipes inside the phase change water heater, and there are many connection ports, which leads to a high risk of water leakage; also due to the circulation of phase change materials, there is a circulation pump inside the water heater for circulating the phase change material, which is easily affected by water quality, scale after heating and other reasons, causing the pump to get stuck and unable to work; furthermore, the phase change liquid in the existing phase change water heater is placed in a closed box, and the entire machine cannot be used when it leaks; and the existing phase change water heaters generally use a fin type + copper tube method, with a small heat exchange area and a low effect.

[0005] In order to solve some of the above technical problems, a blade type heat storage device and an electric water heater according to the technical solution of the utility model are proposed. Utility Model Content

[0006] In order to overcome at least one of the defects of the above-mentioned prior art, one of the purposes of the utility model is to provide a blade-type heat storage device, including a plurality of independent and parallel heat storage units, each heat storage unit is independent of each other, and when one or several heat storage units fail, it does not affect the normal operation of other heat storage units, and the heat exchange work is carried out normally, so that the blade-type heat storage device can still be used.

[0007] In order to overcome at least one defect of the above-mentioned prior art, the second purpose of the utility model is to provide an electric water heater, which has the aforementioned blade type heat storage device. After some units in the blade type heat storage device fail, the electric water heater can continue to be used.

[0008] The technical solution adopted by the utility model to solve the problem is:

[0009] A blade-type heat storage device comprises a plurality of independent and parallel heat storage units, wherein the heat storage units comprise a liquid heat exchange mechanism, a heat storage material and a first heating mechanism;

[0010] The first heating mechanism heats at least a portion of the heat storage material, and the heat storage material stores thermal energy;

[0011] The excess liquid heat exchange mechanism is at least partially in contact with the heat storage material. Water is injected into the excess liquid heat exchange mechanism. The water exchanges heat with the heat storage material through the excess liquid heat exchange mechanism, and the water temperature rises.

[0012] Furthermore, the blade-type heat storage device further comprises a box body, the box body is sealed, the heat storage material is sealed in the box body, and the heat storage material at least partially wraps the liquid heat exchange mechanism;

[0013] The first heating mechanism is disposed inside the box and / or outside the box to heat the heat storage material sealed inside the box, and the heat storage material stores thermal energy.

[0014] Furthermore, the heat storage material completely wraps the liquid heat exchange mechanism, the first heating mechanism is arranged outside the box and transfers heat to the heat storage material through the box, and the heat storage material stores thermal energy.

[0015] Furthermore, the box body includes at least one heat-conducting surface, the first heating mechanism is a thin film heater and is arranged on the outer surface of the heat-conducting surface, the thin film heater transfers heat to the heat storage material in the box body through the heat-conducting surface, and the heat storage material stores thermal energy.

[0016] Furthermore, the liquid-through heat exchange mechanism includes a liquid distributor, a liquid collector, a liquid inlet pipe, a liquid outlet pipe and a plurality of microchannel branches, the liquid inlet pipe and the liquid outlet pipe are respectively connected to the liquid distributor and the liquid collector, the liquid distributor and the liquid collector are both connected to the microchannel branches, water flows from the liquid distributor into the microchannel branches, and enters the liquid collector through the microchannel branches, and the heat storage material at least wraps the microchannel branches.

[0017] Furthermore, the microchannel branches are all made of heat-conducting materials, and the microchannel branches are arranged side by side, a heat exchange support plate is provided between two adjacent microchannel branches, the heat storage material wraps the microchannel branches, the liquid distribution pipe and the liquid collecting pipe, and the liquid inlet pipe and the liquid outlet pipe both extend out of the heat storage material.

[0018] Furthermore, the blade-type heat storage device comprises at least two of the heat storage units, and each of the heat storage units is arranged in parallel;

[0019] It also includes a liquid inlet main pipe and a liquid outlet main pipe, each of the liquid inlet pipes is connected to the liquid inlet main pipe, and each of the liquid outlet pipes is connected to the liquid outlet main pipe.

[0020] Furthermore, the heat storage material includes a phase change material.

[0021] An electric water heater comprises the aforementioned blade type heat storage device.

[0022] Furthermore, the electric water heater further comprises a liquid inlet pipe and a liquid discharge pipe, wherein the liquid inlet pipe injects water into the liquid-transferring heat exchange mechanism of the blade-type heat storage device, and the water exchanges heat with the heat storage material through the liquid-transferring heat exchange mechanism, and the water is heated; when the water is used, the water that has been heated by exchanging heat with the heat storage material and heated is discharged through the liquid discharge pipe;

[0023] It also includes a second heating mechanism, which is arranged on the water inlet side and / or the water outlet side of the blade type heat storage device;

[0024] It also includes a water valve, which is arranged on the water inlet side and / or the water outlet side of the blade type heat storage device;

[0025] It also includes a controller, which is electrically connected to the blade type heat storage device and the second heating mechanism.

[0026] In summary, the blade-type heat storage device provided by the utility model has the following technical effects:

[0027] 1. The blade-type heat storage device includes several independent and parallel heat storage units, each of which can exchange heat and work independently. When one or several heat storage units fail or leak, the remaining heat storage units can still work normally, that is, the blade-type heat storage device can still work normally.

[0028] 2. The heat storage material is sealed in the box and heated by the first heating mechanism. The heat storage material does not need to be circulated during the heat storage process, thus avoiding the use of a circulation pump body and the blade-type heat storage device from being stuck and unable to work due to the circulation pump body being affected by water quality, scale after heating, etc., thereby reducing the failure rate of the blade-type heat storage device, reducing the maintenance cost of the blade-type heat storage device, and extending the service life of the blade-type heat storage device.

[0029] 3. The first heating mechanism is arranged outside the box body and heats the heat storage material by heat conduction between the box body and the heat storage material, so as to facilitate maintenance when the first heating mechanism fails and avoid opening the box body during maintenance, which may cause leakage of the heat storage material and other problems, thereby reducing the maintenance difficulty and maintenance cost of the blade type heat storage device.

[0030] 4. The liquid heat exchange mechanism adopts several micro-channel branches to increase the contact area between the heated water and the heat storage material, thereby improving the heat exchange efficiency.

[0031] In summary, the electric water heater provided by the utility model has the following technical effects:

[0032] The electric water heater uses the aforementioned blade-type heat storage device, so that when one or more heat storage units of the electric water heater fail or leak, the electric water heater can still work normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The utility model is a schematic structural diagram of an electric water heater according to an embodiment of the present invention.

[0034] Figure 2 The utility model is a schematic structural diagram of a blade-type heat storage device according to an embodiment of the present invention.

[0035] Figure 3 It is a schematic structural diagram of an embodiment of the heat storage unit in the utility model.

[0036] Figure 4 for Figure 3 Schematic diagram of the internal structure of the medium heat storage unit.

[0037] Figure 5 for Figure 4 AA section view.

[0038] Figure 6 for Figure 4 Enlarged view of point B in the middle.

[0039] The meanings of the reference numerals are as follows:

[0040] 10. Blade-type heat storage device; 21. Water tank; 22. Foaming layer; 23. Liquid inlet pipe; 24. Liquid discharge pipe; 25. Second heating mechanism; 26. Controller;

[0041] 1. heat storage unit; 11. liquid inlet pipe; 12. liquid outlet pipe; 13. liquid distribution pipe; 14. liquid collecting pipe; 15. microchannel branch pipe; 16. heat exchange support plate; 17. first heating mechanism; 18. box; 19. heat storage material; 31. liquid guide pipe; 32. liquid heat exchange mechanism; 33. liquid inlet main pipe; 34. liquid outlet main pipe. DETAILED DESCRIPTION

[0042] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0045] See also Figure 1 , the utility model discloses a structural schematic diagram of an embodiment of an electric water heater.

[0046] An electric water heater is provided with a blade-type heat storage device 10. The blade-type heat storage device 10 in the technical solution can enable the water heater to continue to work after a part of the heat storage unit 1 leaks or fails. At the same time, the heat storage material in the blade-type heat storage device 10 of the solution does not need to be circulated by a circulation pump, which reduces the failure rate of the blade-type heat storage device 10, reduces the use cost and maintenance cost of the electric water heater, and prolongs the service life of the electric water heater. In order to facilitate the further understanding of the structure and function of the blade-type heat storage device 10 in the electric water heater by those skilled in the art, the following is combined with Figures 2 to 6 , a schematic structural diagram of an embodiment of a blade-type heat storage device 10 is proposed.

[0047] like Figure 2 and Figure 3 As shown, a blade-type heat storage device 10 of the present invention comprises a plurality of independent and parallel heat storage units 1. The heat storage units are independent of each other and are arranged in parallel, so that when one or more heat storage units in the blade-type heat storage device 10 fail, the remaining heat storage units can still work normally, and the blade-type heat storage device 10 can still work normally.

[0048] like Figure 4 As shown, the heat storage unit 1 includes a liquid heat exchange mechanism 32, a heat storage material 19 and a first heating mechanism 17. The first heating mechanism 17 heats at least a portion of the heat storage material 19, and the heat storage material 19 stores thermal energy. The liquid heat exchange mechanism 32 is at least partially in contact with the heat storage material 19, and water is injected into the liquid heat exchange mechanism 32. The water exchanges heat with the heat storage material 19 through the liquid heat exchange mechanism 32, and the water temperature rises.

[0049] Based on the above solution, the structure of the heat storage unit 1 is a prerequisite for ensuring that after some heat storage units 1 in the blade-type heat storage device 10 fail, the remaining heat storage units 1 can still work normally.

[0050] Based on the above scheme, the first heating mechanism 17 heats the heat storage material, and the heat storage material stores the heat. Then, when there is water in the liquid heat exchange mechanism 32 or water flows through it, the water in the liquid heat exchange mechanism 32 exchanges heat with the heat storage material through the liquid heat exchange mechanism 32, and the water in the liquid heat exchange mechanism 32 absorbs the heat in the heat storage material, and the water in the liquid heat exchange mechanism 32 is heated.

[0051] Based on the above technical solution, according to the installation relationship or the arrangement position of the first heating mechanism 17, the first heating mechanism 17 heats at least part of the heat storage material 19 to ensure that the first heating mechanism 17 heats the heat storage material normally so that the heat storage material stores thermal energy.

[0052] In order to save electric energy, it is generally possible to set the first heating mechanism 17 to heat the heat storage material when the electricity consumption is low, and the heat storage material stores the heat for standby use. When water is used, water flows through the liquid heat exchange mechanism 32, and the water in the liquid heat exchange mechanism 32 exchanges heat with the heat storage material, and the water in the liquid heat exchange mechanism 32 is heated for use.

[0053] Of course, when the first heating mechanism 17 heats the heat storage material, if there is water in the superfluid heat exchange mechanism 32, the water in the superfluid heat exchange mechanism 32 will also exchange heat with the heat storage material. When the water temperature in the superfluid heat exchange mechanism 32 reaches the heat exchange value, heat exchange will no longer be performed, and the remaining heat generated by the first heating mechanism 17 will be stored in the heat storage material.

[0054] Of course, when using water, if necessary, especially in the later stage of water use, the heat energy in the heat storage material is consumed in large quantities, and the first heating mechanism 17 needs to heat the heat storage material in time, that is, when using water, the first heating mechanism 17 can also heat the heat storage material to extend the water use time and ensure the water temperature.

[0055] After the blade-type heat storage device 10 of the present solution is applied to the electric water heater, it can be selected that when the electric water heater is not using water, no water is stored in the liquid heat exchange mechanism 32 of the blade-type heat storage device 10, thereby avoiding the problem of repeated heat exchange of water in the liquid heat exchange mechanism 32, and also avoiding the problem of warm water staying in the liquid heat exchange mechanism 32 for a long time, causing scale precipitation or adhesion to the inner wall of the liquid heat exchange mechanism 32, affecting the subsequent heat exchange efficiency of the liquid heat exchange mechanism 32.

[0056] like Figure 4As shown, the blade type heat storage device 10 further includes a box body 18, and the box body 18 is sealed. The heat storage material 19 is sealed in the box body 18, and the heat storage material 19 at least partially wraps the liquid heat exchange mechanism 32. The first heating mechanism 17 is arranged in the box body 18 and / or outside the box body 18, and heats the heat storage material 19 sealed in the box body 18, and the heat storage material 19 stores thermal energy.

[0057] Based on the above scheme, the box is sealed and the heat storage material is sealed in the box. The first heating mechanism 17 heats the heat storage material sealed in the box 18. During heating, the heat storage material in the box 18 does not circulate with the outside and does not circulate to the outside of the box, thereby reducing the probability of leakage of the heat storage material. In addition, the heat storage material does not need to circulate, that is, there is no need to use structural components such as a circulation pump, which avoids the problem of clogging of the circulation pump caused by dust and dirt deposited in the heat storage material for a long time, thereby reducing the probability of failure of the heat storage unit 1.

[0058] Based on the above solution, the first heating mechanism 17 is installed inside or outside the box, and it is necessary to heat the heat storage material sealed in the box.

[0059] like Figure 4 As shown, the heat storage material 19 completely wraps the liquid heat exchange mechanism 32, increases the heat exchange area between the liquid heat exchange mechanism 32 and the heat storage material, improves the heat exchange efficiency, ensures that when water is used, the water flow in the liquid heat exchange mechanism 32 can quickly exchange heat with the heat storage material through the liquid heat exchange mechanism 32, realizes live water washing, and ensures the water flow and water pressure.

[0060] like Figure 4 and Figure 6 As shown, the first heating mechanism 17 is arranged outside the box 18 and transfers heat to the heat storage material 19 through the box 18, and the heat storage material 19 stores thermal energy. The first heating mechanism 17 is arranged outside the box 18, so that when the first heating mechanism 17 fails, etc., it is convenient to repair the first heating mechanism 17 in a timely and convenient manner, thereby reducing the difficulty of repair and the cost of repair and maintenance. During repair, the box does not need to be disassembled, and leakage or evaporation of the heat storage material in the box will not be caused.

[0061] like Figure 4 and Figure 6As shown, in order to improve the heating efficiency of the first heating mechanism 17 on the heat storage material in the box, the box 18 includes at least one heat-conducting surface, and the first heating mechanism 17 is a thin film heater and is arranged on the outer surface of the heat-conducting surface. The thin film heater transfers heat to the heat storage material 19 in the box 18 through the heat-conducting surface, and the heat storage material 19 stores thermal energy. The heat-conducting surface has good and efficient heat conduction ability, and the heat-conducting surface can quickly transfer the heat from the first heating mechanism 17 to the heat storage material in the box, thereby improving the heating efficiency and reducing heat loss. The first heating mechanism 17 is a thin film heater, which has a simple structure and can be well covered on the heat-conducting surface, thereby increasing the heating area of ​​the heat-conducting surface and improving the heating efficiency of the heat storage material in the box.

[0062] like Figure 3 , Figure 4 and Figure 5 As shown, the liquid-through heat exchange mechanism 32 includes a liquid distributor 13, a liquid collector 14, a liquid inlet pipe 11, a liquid outlet pipe 12, and a plurality of microchannel branches 15. The liquid inlet pipe 11 and the liquid outlet pipe 12 are respectively connected to the liquid distributor 13 and the liquid collector 14, and the liquid distributor 13 and the liquid collector 14 are both connected to the microchannel branches 15. Water flows from the liquid distributor 13 into the microchannel branches 15, and then into the liquid collector 14 through the microchannel branches 15, and the heat storage material 19 at least wraps the microchannel branches 15.

[0063] like Figure 4 In the process, the water flows into the liquid dispensing pipe 13 from the liquid inlet pipe 11, enters the microchannel branch pipe 15 connected with the liquid dispensing pipe 13 from the liquid dispensing pipe 13, flows to the liquid guide pipe 31 at the other end of the microchannel branch pipe 15 through the microchannel branch pipe 15, and then enters the remaining microchannel branch pipe 15 connected with the liquid collecting pipe 14 through the liquid guide pipe 31, enters the liquid collecting pipe 14 through the microchannel branch pipe 15, enters the liquid outlet pipe 12 through the liquid collecting pipe 14, and finally is discharged from the liquid outlet pipe 12. In the above process, the water flows through the microchannel branch pipe 15 twice, which prolongs the time of the water flow in the microchannel branch pipe 15, that is, prolongs the time of the water flow exchanging heat with the heat storage material, so that the water flow can obtain enough heat energy, and the water flow rises to the required temperature to ensure the water temperature.

[0064] In the above scheme, by setting and arranging the structure of the liquid distribution pipe 13, the liquid collection pipe 14, the microchannel branch pipe 15 and the liquid guide pipe 31, the flow distance of the water flow is extended in the effective box 18, while the size of the water flow and the water pressure are ensured to ensure normal water demand.

[0065] like Figure 4 and Figure 5As shown, the microchannel branch pipes 15 are all made of heat-conducting materials, and the microchannel branch pipes 15 realize the flow-guiding function and the heat exchange between the water flow and the heat storage material. General heat-conducting materials include metal materials with high heat-conducting efficiency and corrosion resistance such as copper and aluminum.

[0066] like Figure 4 and Figure 5 As shown, the microchannel branch pipes 15 are arranged side by side, which is convenient for layout, and at the same time ensures that each microchannel branch pipe 15 can contact with the heat storage material, ensuring the heat exchange efficiency of the microchannel branch pipes 15. A heat exchange support sheet 16 is arranged between two adjacent microchannel branch pipes 15, and the heat exchange support sheet 16 supports the microchannel branch pipes 15 to ensure the fixed position of the microchannel branch pipes 15. At the same time, the heat exchange support sheet 16 also has a high heat conduction effect, which can realize the heat exchange between the water flow in the microchannel branch pipe 15 and the heat storage material, thereby improving the heat exchange efficiency.

[0067] The structure of the heat exchange support sheet 16 can be a wave-spinning shape or a V-shape, or a porous support, mainly to ensure the distance between the two channels and gravity support. The cross-sectional shape of the microchannel branch 15 can be an ellipse, or a round rectangle, etc., which is conducive to increasing the contact between the water body and the metal wall.

[0068] The heat storage material 19 wraps the microchannel branch pipe 15, the liquid distribution pipe 13 and the liquid collecting pipe 14, and the liquid inlet pipe 11 and the liquid outlet pipe 12 both extend out of the heat storage material 19, which is convenient for the parallel connection of the heat storage unit, and is more convenient for the installation of the heat storage unit or the blade type heat storage device 10 inside the electric water heater, and is convenient for the connection operation of the pipeline.

[0069] like Figure 2 and Figure 3 As shown, the blade type heat storage device 10 includes at least two heat storage units 1, and each of the heat storage units 1 is arranged side by side. According to the volume and capacity of the electric water heater, and also according to the volume and capacity of the heat storage unit, a reasonable number of heat storage units are selected to form the blade type heat storage device 10, and the blade type heat storage device 10 is installed as a whole inside the electric water heater.

[0070] The blade-type heat storage device 10 also includes a liquid inlet pipe 33 and a liquid outlet pipe 34. Each of the liquid inlet pipes 11 is connected to the liquid inlet pipe 33, and each of the liquid outlet pipes 12 is connected to the liquid outlet pipe 34, which facilitates the installation of the blade-type heat storage device 10 in the electric water heater and the connection of the pipelines.

[0071] In this technical solution, in order to improve the heat storage capacity of the heat storage material, the heat storage material 19 includes a phase change material. Phase change materials (PCMs) are a special type of substance that can absorb or release a large amount of latent heat within a specific temperature range, and achieve energy storage and release through a phase change process (such as from solid to liquid or from liquid to gas). The heat storage material uses a phase change material, which has good heat storage capacity and high heat exchange efficiency, and can extend the water use time.

[0072] In the technical solution, the electric water heater further includes a liquid inlet pipe 23 and a liquid discharge pipe 24. The liquid inlet pipe 23 injects water into the liquid-passing heat exchange mechanism 32 of the blade-type heat storage device 10, and the water exchanges heat with the heat storage material 19 through the liquid-passing heat exchange mechanism 32, and the water is heated. When the water is used, the water that has been heated by exchanging heat with the heat storage material 19 is discharged through the liquid discharge pipe 24. When the blade-type heat storage device 10 is installed in the electric water heater, the liquid inlet pipe 23 and the liquid discharge pipe 24 are connected to the liquid inlet main pipe 33 and the liquid outlet main pipe 34 respectively.

[0073] In the technical solution, the electric water heater further includes a second heating mechanism 25, which is arranged at the water inlet side and / or the water outlet side of the blade-type heat storage device 10. When the water temperature requirement is high, or when the heat energy consumption in the heat storage material is large and the water flow of the required temperature cannot be obtained through heat exchange, the second heating mechanism 25 is started to heat the water. The second heating mechanism 25 can be arranged at the water inlet side and / or the water outlet side of the blade-type heat storage device 10.

[0074] In the technical solution, the electric water heater also includes a water valve, which is arranged on the water inlet side and / or the water outlet side of the blade-type heat storage device 10. The water valve controls the on-off of the water supply of the electric water heater. The water valve is arranged on the water outlet side of the blade-type heat storage device 10, and the on-off of the water supply can be timely controlled by controlling the water valve. The water valve is arranged on the water outlet side of the blade-type heat storage device 10. After the water supply is stopped, there is still a certain amount of water in the liquid heat exchange mechanism 32. When the heat storage material stores heat, the liquid heat exchange mechanism 32 can be prevented from drying out. The water valve is arranged on the water inlet side of the blade-type heat storage device 10. After the water supply is stopped, there is no water in the liquid heat exchange mechanism 32. This avoids the liquid heat exchange mechanism 32 from retaining hot water for a long time, avoids the formation of scale in the liquid heat exchange mechanism 32 due to the long-term water storage and adheres to the inner surface of the liquid heat exchange mechanism 32, and avoids affecting the heat exchange capacity of the liquid heat exchange mechanism 32.

[0075] In the technical solution, the electric water heater further includes a controller 26, which is electrically connected to the blade-type heat storage device 10 and the second heating mechanism 25. The controller 26 controls the heat storage time of the blade-type heat storage device 10, controls the heating time of the second heating mechanism 25, or controls the heating conditions of the second heating mechanism 25.

[0076] In the present technical solution, the electric water heater further includes a water tank 21 and a foaming layer 22. The blade-type heat storage device is installed inside the foaming layer 22 to insulate the blade-type heat storage device 10 and reduce heat loss.

[0077] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A blade type heat storage device, characterized in that: It comprises a plurality of independent and parallel heat storage units, wherein the heat storage units comprise a liquid heat exchange mechanism, a heat storage material and a first heating mechanism; The first heating mechanism heats at least a portion of the heat storage material, and the heat storage material stores thermal energy; The excess liquid heat exchange mechanism is at least partially in contact with the heat storage material. Water is injected into the excess liquid heat exchange mechanism. The water exchanges heat with the heat storage material through the excess liquid heat exchange mechanism, and the water temperature rises.

2. The blade type heat storage device according to claim 1, characterized in that: It also includes a box body, the box body is sealed, the heat storage material is sealed in the box body, and the heat storage material at least partially wraps the liquid heat exchange mechanism; The first heating mechanism is disposed inside the box and / or outside the box to heat the heat storage material sealed inside the box, and the heat storage material stores thermal energy.

3. The blade type heat storage device according to claim 2, characterized in that: The heat storage material completely wraps the liquid heat exchange mechanism, the first heating mechanism is arranged outside the box and transfers heat to the heat storage material through the box, and the heat storage material stores thermal energy.

4. The blade type heat storage device according to claim 2 or 3, characterized in that: The box body at least includes a heat-conducting surface, the first heating mechanism is a thin film heater and is arranged on the outer surface of the heat-conducting surface, the thin film heater transfers heat to the heat storage material in the box body through the heat-conducting surface, and the heat storage material stores thermal energy.

5. The blade type heat storage device according to claim 1, characterized in that: The liquid-through heat exchange mechanism includes a liquid distributor, a liquid collector, a liquid inlet pipe, a liquid outlet pipe and a plurality of microchannel branches. The liquid inlet pipe and the liquid outlet pipe are respectively connected to the liquid distributor and the liquid collector. The liquid distributor and the liquid collector are both connected to the microchannel branches. Water flows from the liquid distributor into the microchannel branches and into the liquid collector through the microchannel branches. The heat storage material at least wraps the microchannel branches.

6. The blade type heat storage device according to claim 5, characterized in that: The microchannel branches are all made of heat-conducting materials, and the microchannel branches are arranged side by side. A heat exchange support sheet is provided between two adjacent microchannel branches. The heat storage material wraps the microchannel branches, the liquid distribution pipe and the liquid collection pipe, and the liquid inlet pipe and the liquid outlet pipe both extend out of the heat storage material.

7. The blade type heat storage device according to claim 5 or 6, characterized in that: It comprises at least two of the heat storage units, and each of the heat storage units is arranged in parallel; It also includes a liquid inlet main pipe and a liquid outlet main pipe, each of the liquid inlet pipes is connected to the liquid inlet main pipe, and each of the liquid outlet pipes is connected to the liquid outlet main pipe.

8. The blade type heat storage device according to claim 1, characterized in that: The thermal storage material includes a phase change material.

9. An electric water heater, characterized in that: It comprises the blade type heat storage device as described in any one of claims 1 to 7.

10. The electric water heater according to claim 9, characterized in that: It also includes a liquid inlet pipe and a liquid discharge pipe, wherein the liquid inlet pipe injects water into the liquid-exchange mechanism of the blade-type heat storage device, and the water exchanges heat with the heat storage material through the liquid-exchange mechanism, and the water is heated; when water is used, the water that has been heated by the heat exchange with the heat storage material and heated is discharged through the liquid discharge pipe; It also includes a second heating mechanism, which is arranged on the water inlet side and / or the water outlet side of the blade type heat storage device; It also includes a water valve, which is arranged on the water inlet side and / or the water outlet side of the blade type heat storage device; It also includes a controller, which is electrically connected to the blade type heat storage device and the second heating mechanism.

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