CN111256366A - Zero-scale modular energy storage electric water heater - Google Patents
Zero-scale modular energy storage electric water heater Download PDFInfo
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- CN111256366A CN111256366A CN202010232635.XA CN202010232635A CN111256366A CN 111256366 A CN111256366 A CN 111256366A CN 202010232635 A CN202010232635 A CN 202010232635A CN 111256366 A CN111256366 A CN 111256366A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 127
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 230000008859 change Effects 0.000 claims abstract description 114
- 239000007790 solid phase Substances 0.000 claims abstract description 106
- 239000011232 storage material Substances 0.000 claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 238000005485 electric heating Methods 0.000 claims abstract description 25
- 229910052751 metal Inorganic materials 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 25
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 abstract description 4
- 238000009825 accumulation Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 7
- 239000012071 phase Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000013021 overheating Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005338 heat storage Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 239000012782 phase change material Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
- F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
- F24H7/0208—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using electrical energy supply
- F24H7/0233—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using electrical energy supply the transfer fluid being water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a zero-scale modular energy-storage electric water heater, which comprises: the shell is internally provided with an accommodating space, and the end cover covers the open end of the shell; the solid-solid phase change energy storage module and the heat exchange module are arranged in the shell accommodating space and are nested with each other; and the electric heating module is arranged in the accommodating space of the shell and is used for heating the solid-solid phase change energy storage module. The zero-scale modular energy storage electric water heater provided by the invention is heated by sensible heat and latent heat of the solid-solid phase change energy storage material, so that scale accumulation and heavy metal generation are avoided, valley electricity can be used for heating, and the energy-saving effect is good.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a zero-scale modular energy storage electric water heater based on a phase change energy storage technology.
Background
The common electric water heater in the market at present usually has two forms, one is to have a water storage liner structure, and the built-in electric heating device thereof leads to the formation of serious scale inside the liner after long-term use, and simultaneously, the water corrodes metal heating rods, metal shells and the like to generate heavy metals, thus causing great hidden danger to human health; the other type is a real-time water heating mode, energy storage and heat storage cannot be achieved, valley electricity cannot be utilized, and the energy-saving effect is poor. In addition, the water heater adopting the electric heating mode directly heats the water body by using electric energy, and the hidden troubles of electric leakage and explosion exist. The present invention is intended to solve the above-mentioned technical problems.
Disclosure of Invention
The invention provides a zero-scale modular energy storage electric water heater aiming at the defects of the prior art, and aims to solve the problems that the electric water heater in the prior art forms scale and heavy metal and has poor energy-saving effect.
The invention provides a zero-scale modular energy-storage electric water heater, which comprises: the shell is internally provided with an accommodating space, and the end cover covers the open end of the shell; the solid-solid phase change energy storage module and the heat exchange module are arranged in the shell accommodating space and are nested with each other; and the electric heating module is arranged in the accommodating space of the shell and is used for heating the solid-solid phase change energy storage module.
Furthermore, the solid-solid phase change energy storage module is a solid-solid phase change energy storage material directly filled in the accommodating cavity, and the heat exchange module is embedded in the solid-solid phase change energy storage material.
Furthermore, the solid-solid phase change energy storage module is made of a preformed solid-solid phase change energy storage material and is arranged in the accommodating space of the shell in a stacking mode with the heat exchange module.
Furthermore, the number of the solid-solid phase change energy storage modules is M, the number of the heat exchange modules is N, and the solid-solid phase change energy storage modules and the heat exchange modules are alternately stacked, wherein M and N are integers greater than or equal to 1, and M is equal to N + 1.
Furthermore, the number of the solid-solid phase change energy storage modules is M, the number of the heat exchange modules is N, two sides of each heat exchange module are in contact with the solid-solid phase change energy storage modules, wherein M and N are integers greater than or equal to 1, and M is equal to 2N.
Further, the thickness of the solid-solid phase change energy storage module is 3-50 mm.
Furthermore, the heat exchange modules are metal coil pipes, each metal coil pipe is provided with a water inlet and a water outlet, and the water inlets and the water outlets of the plurality of heat exchange modules are respectively connected in parallel and led out by the end covers to form a main water inlet and a main water outlet.
Further, the metal coil is a circular coil or a serpentine coil in the same plane.
Further, the inner diameter of the metal coil pipe is 5-10 mm.
Furthermore, the electric water heater also comprises a temperature control device for monitoring the heating temperature and the water outlet temperature of the solid-solid phase change energy storage module.
Further, a heat conduction fin is arranged in the solid-solid phase change energy storage module.
Furthermore, the electric heating module is an electric heating wire wound along the length direction of the heat exchange module or an electric heating sheet embedded in the solid-solid phase change energy storage module.
The zero-scale modular energy storage electric water heater provided by the invention heats water by sensible heat and latent heat of the solid-solid phase change energy storage material, avoids scale accumulation and heavy metal generation caused by direct electric heating, and can utilize valley electricity to heat the solid-solid phase change energy storage material to store heat, so that the energy-saving effect is good.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more comprehensible.
Drawings
Fig. 1 is a perspective assembly view of a housing of an electric water heater according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a housing of an electric water heater according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an end cap of an electric water heater provided according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a phase change energy storage module of an electric water heater according to an embodiment of the present invention;
fig. 5 is a schematic view of a heat exchange module, an electric heating module and a support structure of an electric water heater provided according to an embodiment of the invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 to 5, a zero-scale modular energy storage electric water heater includes a housing 1, an end cover 2, a solid-solid phase change energy storage module 3, a heat exchange module 4 and an electric heating module 5. The shell 1 is of a hollow cavity structure, an accommodating space is formed inside the shell, one end of the accommodating space is an opening end, the other end of the accommodating space is a closed end, the accommodating space is formed inside the shell 1, and the end cover 2 covers the opening end of the shell 1; at least one solid-solid phase change energy storage module 3 and at least one heat exchange module 4 which are mutually nested are arranged in the shell 1; the electric heating module 5 is arranged in the shell 1 and used for heating the solid-solid phase change energy storage module 3. The zero-scale modular energy storage electric water heater provided by the invention heats the solid-solid phase change energy storage module 3 through the electric heating module 5 by using electric energy, and absorbs heat stored in the solid-solid phase change energy storage module 3 to be converted into hot water to be output when cold water flows through the heat exchange module 4. The materials of the shell 1 and the end cap 2 in the present invention can be metal or nonmetal materials in the prior art, and can be selected by those skilled in the art according to the needs.
In some embodiments of the present invention, the solid-solid phase change energy storage module 3 is a solid-solid phase change energy storage material directly filled in the housing, and the heat exchange module 4 and the electric heating module 5 are embedded in the solid-solid phase change energy storage material, at this time, the solid-solid phase change energy storage module 3 and the heat exchange module 4 are nested into each other, so that a larger contact area is provided, and the heat exchange efficiency is high.
In other embodiments of the present invention, in order to adjust the number of the solid-solid phase change energy storage modules 3 and the heat exchange modules 4 according to different thermal loads, the solid-solid phase change energy storage modules 3 are preferably pre-molded and then installed in the housing 1 by directly filling the solid-solid phase change energy storage materials in the housing 1. The prefabrication molding process is to place the solid-solid phase change energy storage material in a molding die and press the solid-solid phase change energy storage material into any desired shape, such as a columnar structure, a cuboid structure or other special-shaped structures, by using a press molding method. During pressing, the width of the solid-solid phase change energy storage module 3 is 0.5-1mm wider than the inner cavity of the shell 1, so that when the solid-solid phase change energy storage module 3 is loaded into the shell 1, a small amount of powder of the solid-solid phase change energy storage material is stripped, and then the gap between the solid-solid phase change energy storage module 3 and the inner part of the shell 1 is reduced to the minimum. The solid-solid phase change energy storage material is pressed and formed, so that the longitudinal thermal resistance of the phase change energy storage material is reduced, the heat absorption and heat exchange efficiency is improved, the phase change material can be uniformly heated, and overheating is avoided. According to different heat load requirements, the thickness of the solid-solid phase change energy storage module 3 is 3-50mm in compression molding, and the preferable thickness is 6-10mm, so that the solid-solid phase change energy storage module has certain strength and simultaneously has a large contact area and a good heat conduction effect.
In the invention, the solid-solid phase change energy storage material is inorganic hydrated salt, wherein a nucleating agent, a heat conduction material and an adsorption material are added, the solid-solid phase change energy storage material is formed by compounding in a vacuum adsorption mode, and the solid-solid phase change energy storage material is firstly crushed into powder when being pressed and formed or directly filled into the shell 1. The phase change temperature of the solid-solid phase change energy storage material is 50-55 ℃, the temperature peak value is less than 100 ℃, and the operation temperature range is safe and reliable.
In the embodiment of the present invention, the heat exchange module 4 is a metal coil, which may be made of copper, stainless steel or other metal materials. The metal coil pipes are provided with water inlets 41 and water outlets 42, the water inlets 41 of the plurality of metal coil pipes are connected in parallel and led out by the end cover 2 to form a total water inlet 21, the water outlets 42 of the plurality of metal coil pipes are connected in parallel and led out by the end cover 2 to form a total water outlet 22, and a water inlet valve (not shown in the figure) is arranged at the total water inlet 21. The metal coil is a circular or serpentine coil formed in the same plane, and those skilled in the art can select any other shape according to the site requirement, and the shape is not limited in detail here. The metal coil has the advantages of large contact area and high heat exchange efficiency. In the embodiment of the invention, the inner diameter of the metal coil is 5-10mm, and a person skilled in the art can calculate the optimal pipe diameter and the thickness of the solid-solid phase change energy storage material according to the pressure drop of the pipeline and the heat transfer efficiency so as to achieve the optimal matching.
Optionally, a support structure 6 is provided on one or both sides of the metal coil to prevent deformation of the coil. The support structure 6 may be a strip of metallic or non-metallic material having a certain stiffness.
In some embodiments of the present invention, in order to meet the thermal load requirements of different situations, the number of the preformed solid-solid phase change energy storage modules 3 and the heat exchange modules 4 can be flexibly configured, and the configuration modes include the following two types:
(1) the number of the solid-solid phase change energy storage modules 3 is M, the number of the heat exchange modules 4 is N, M and N are integers greater than or equal to 1, and M is equal to N + 1. In this embodiment, the solid-solid phase change energy storage modules 3 and the heat exchange modules 4 are alternately stacked, and both sides of each heat exchange module 4 are in contact with the solid-solid phase change energy storage module 3, so that the heat exchange efficiency is high. Under the configuration mode, the M solid-solid phase change energy storage modules 3 and the N heat exchange modules 4 can be arranged outside the shell 1 in advance and pressed, so that the solid-solid phase change energy storage modules 3 and the heat exchange modules 4 are nested with each other, the structure is compact, the gaps between the solid-solid phase change energy storage modules 3 and the heat exchange modules 4 are reduced, and the heat exchange efficiency is improved.
(2) The number of the solid-solid phase change energy storage modules 3 is M, the number of the heat exchange modules 4 is N, M and N are integers greater than or equal to 1, and M is equal to 2N. In this embodiment, the solid-solid phase change energy storage modules 3 and the heat exchange modules 4 are stacked, each 2 solid-solid phase change energy storage modules 3 and 1 heat exchange module 4 form a module, and 1 heat exchange module 4 is located between 2 solid-solid phase change energy storage modules 3. Under the configuration mode, 1 heat exchange module 4 and 2 solid-solid phase change energy storage modules 3 can be arranged and pressed, so that the solid-solid phase change energy storage modules 3 and the heat exchange modules 4 are nested with each other, the structure is compact, the gap between the solid-solid phase change energy storage modules 3 and the heat exchange modules 4 is reduced, and the heat exchange efficiency is improved.
In an embodiment of the invention, the electrical heating module 5 is used for heating the solid-solid phase change energy storage module 3 with electrical energy. In one embodiment, the electric heating module 5 may be a heating wire wound along the length direction of the metal coil of the heat exchange module 4, and the heating wire arranged along the length direction of the metal coil can improve the heat conduction efficiency through the metal coil, so that the solid-solid phase change energy storage material is heated up quickly; in another embodiment, the electric heating module 5 may be an electric heating sheet embedded in the solid-solid phase change energy storage module 3, and the electric heating sheet has high heat conduction efficiency due to large surface area. In the invention, the electric heating module 5 is positioned inside the solid-solid phase change energy storage material, thereby ensuring good heat conductivity, avoiding the hidden danger of electric leakage caused by exposure to the outside, and further protecting by connecting an electric leakage protection device. In order to further improve the energy efficiency ratio, a heat conduction fin can be added in the solid-solid phase change energy storage material to improve the heat conduction efficiency.
The zero-scale modular energy storage electric water heater provided by the invention further comprises a temperature control device (not shown in the figure) for adjusting the heating temperature and the water outlet temperature of the solid-solid phase change energy storage module 3, wherein the temperature control device comprises an electric control element, a heating temperature measuring element and a water outlet temperature measuring element.
When the solid-solid phase change energy storage module 3 is heated, the heating temperature measuring element detects the temperature of the solid-solid phase change energy storage material on the heating surface in real time to prevent overheating, the heating is automatically stopped when the temperature is close to the overheating temperature, the heating is continuously carried out after the temperature of the solid-solid phase change energy storage material is uniform, and the heating is stopped until the temperature of the solid-solid phase change energy storage material is raised to the preset temperature in the time period. When the temperature reduction amplitude of the solid-solid phase change energy storage material exceeds a set value in the using process, the electric heating is automatically started to raise the temperature to reach a preset temperature. The temperature control device can automatically heat and store energy in the valley period so as to achieve the purpose of high energy efficiency.
In the water outlet stage, water flows into the metal coil pipe through the water inlet valve, and the solid-solid phase change energy storage material exchanges heat with the water through the metal coil pipe to heat up and finish hot water output. The water outlet temperature measuring element detects the temperature of water, and when the temperature of the outlet hot water is lower than the preset water outlet temperature, the electric control element controls the water inlet valve to be closed so as to ensure that the hot water is output according to the temperature required by a user. The zero-scale modular energy storage electric water heater provided by the invention can provide hot water at the temperature of 30-70 ℃.
Furthermore, the zero-scale modular energy storage electric water heater provided by the invention further comprises an insulating layer arranged on the inner wall and/or the outer surface of the shell, and the insulating layer is used for reducing the natural dissipation of heat and further reducing the energy consumption. The heat-insulating layer can be made of polymer heat-insulating materials in the prior art, and can be selected by a person skilled in the art according to needs. In addition, a sealing element, such as a sealing gasket or a sealing plate, can be arranged at the joint of the pipeline, the shell 1, the end cover 2 and the like to ensure the sealing effect and prevent the solid-solid phase change energy storage material from leaking.
The working process of the zero-scale modular energy storage electric water heater provided by the invention comprises two stages of heat storage and heat release, and specifically comprises the following steps:
a heat storage stage: the user sets the heating preset temperature of the solid-solid phase change energy storage material according to the requirement, the temperature control device heats according to the preset temperature, and the electric energy is converted into heat energy through the electric heating module 5 and further absorbed by the solid-solid phase change energy storage material to be converted into sensible heat and latent heat of the solid-solid phase change energy storage material. And the heating temperature measuring element detects the temperature of the solid-solid phase change energy storage material on the heating surface in real time in the heating process to prevent overheating, the heating is automatically stopped when the temperature of the solid-solid phase change energy storage material is close to the overheating temperature, the heating is continuously carried out after the temperature of the solid-solid phase change energy storage material is uniform, and the heating is stopped at different time intervals until the temperature of the solid-solid phase change energy storage material is raised to the heating preset temperature. When the temperature reduction amplitude of the solid-solid phase change energy storage material exceeds a set value in the using process, the electric heating is automatically started to raise the temperature to reach a preset temperature. The temperature control device can automatically heat and store energy in the valley period so as to achieve the purpose of high energy efficiency.
An exothermic phase: water flows into the metal coil pipe through the water inlet valve, sensible heat and latent heat of the solid-solid phase change energy storage material exchange heat with water flow through the metal coil pipe to heat up, and hot water output is completed. The water outlet temperature measuring element detects the temperature of water, and when the temperature of the outlet hot water is lower than the preset water outlet temperature, the electric control element controls the water inlet valve to be closed so as to ensure that the hot water is output according to the temperature required by a user.
The invention provides a zero-scale modular energy-storage electric water heater, which is described in the following by a specific example:
in this embodiment, the zero-scale modular energy storage electric water heater includes 4 solid-solid phase change energy storage modules 3 and 2 heat exchange modules 4, the solid-solid phase change energy storage modules 3 are sheets with a thickness of 8mm and a length and a width of 10cm, the heat exchange modules 4 are stainless steel circular coils with a diameter of 8cm, the electric heating modules 5 are heating wires spirally wound along the length direction of the coils, and the inner diameter of each coil is 8 mm. Every 2 solid-solid phase change energy storage modules 3 and 1 heat exchange module 4 are 1 group, and heat exchange module 4 is located in the middle of 2 solid-solid phase change energy storage modules 3, and the three are stacked and pressed to form a module. The size of the internal accommodating space of the shell 1 is matched with the size of the stack of 2 modules, and the end cover 2 covers the opening end of the shell 1. The water inlets 41 of the two modules are connected in parallel and led out by the end cover 2 to form a main water inlet 21, the water outlets 42 of the two modules are connected in parallel and led out by the end cover 2 to form a main water outlet 22, and the water inlet valve is connected with the main water inlet 21. Setting the heating temperature to 80 ℃, the temperature reduction amplitude to 10 ℃, heating the solid-solid phase change material to 80 ℃ by a temperature control device in a time-phased heating mode, and starting heating when the temperature of the solid-solid phase change material is lower than 70 ℃; the water outlet temperature is set to be 40 ℃, and the water inlet valve is automatically closed when the water outlet temperature is lower than 40 ℃.
The zero-scale modular energy storage electric water heater provided by the invention heats water by sensible heat and latent heat of the solid-solid phase change energy storage material, the temperature of the water body is raised in the flowing process, scale accumulation and heavy metal generation caused by direct electric heating are avoided, and simultaneously, the solid-solid phase change energy storage material can be heated by valley electricity to store heat, so that the energy-saving effect is good.
The zero-scale modular energy storage electric water heater provided by the invention adopts the solid-solid phase change energy storage material, has small volume, light weight and uniform heat release, has smaller phase change volume expansion rate relative to the solid-liquid phase change material, has small pressure change in the shell when phase change occurs, is not easy to generate the phenomena of shell bulging, leakage, deformation and the like, and has high product stability and long service life; the modular arrangement is convenient to assemble, the number of modules can be freely determined according to the heat load, the use is more flexible, meanwhile, the modular design not only improves the heat exchange efficiency and ensures the stability of the water outlet temperature and the water outlet quantity, but also realizes the flow distribution, reduces the flow speed, has small loss of flow pressure drop in the pipeline and does not need to add a pump body; the temperature control device realizes the automatic control of the electric water heater and is more intelligent.
In the description of the present invention, it is to be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.
Finally, it is noted that: the above-mentioned embodiments are only examples of the present invention, and it is a matter of course that those skilled in the art can make modifications and variations to the present invention, and it is considered that the present invention is protected by the claims and the equivalent technology if they fall within the scope of the present invention.
Claims (12)
1. A zero-scale modular energy-storage electric water heater is characterized by comprising:
the shell is internally provided with an accommodating space, and the end cover covers the open end of the shell;
the solid-solid phase change energy storage module and the heat exchange module are arranged in the shell accommodating space and are nested with each other;
and the electric heating module is arranged in the accommodating space of the shell and is used for heating the solid-solid phase change energy storage module.
2. The electric water heater according to claim 1, wherein the solid-solid phase change energy storage module is a solid-solid phase change energy storage material directly filled in the accommodating cavity, and the heat exchange module is embedded in the solid-solid phase change energy storage material.
3. The electric water heater according to claim 1, wherein the solid-solid phase change energy storage module is a preformed solid-solid phase change energy storage material and is stacked with the heat exchange module in the accommodating space of the housing.
4. The electric water heater according to claim 3, wherein the number of the solid-solid phase change energy storage modules is M, the number of the heat exchange modules is N, and the solid-solid phase change energy storage modules and the heat exchange modules are alternately stacked, wherein M and N are integers greater than or equal to 1, and M is equal to N + 1.
5. The electric water heater according to claim 3, wherein the number of the solid-solid phase change energy storage modules is M, the number of the heat exchange modules is N, and both sides of the heat exchange modules are in contact with the solid-solid phase change energy storage modules, wherein M and N are integers greater than or equal to 1, and M is equal to 2N.
6. The electric water heater of claim 3, wherein the thickness of the solid-solid phase change energy storage module is 3-50 mm.
7. The electric water heater according to claim 1, wherein the heat exchange module is a metal coil having a water inlet and a water outlet, and the water inlets and the water outlets of the plurality of heat exchange modules are respectively connected in parallel and led out by an end cover to form a total water inlet and a total water outlet.
8. The electric water heater according to claim 1, wherein the metal coil is a circular coil or a serpentine coil in the same plane.
9. The electric water heater according to claim 7, wherein the metal coil has an inner diameter of 5-10 mm.
10. The electric water heater according to claims 1-9, further comprising a temperature control device for monitoring the heating temperature and the outlet water temperature of the solid-solid phase change energy storage module.
11. The electric water heater according to claims 1-9, wherein heat conducting fins are provided within the solid-solid phase change energy storage module.
12. The electric water heater according to claim 1-9, wherein the electric heating module is a heating wire wound along the length direction of the heat exchange module or a heating sheet embedded in the solid-solid phase change energy storage module.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011007418A (en) * | 2009-06-25 | 2011-01-13 | Sumitomo Electric Ind Ltd | Heat pump heater-water heater |
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