Ironing device of replaceable fused salt energy storage module based on liquid-solid phase change

Abstract

The invention provides an ironing device with a replaceable fused salt energy storage module based on liquid-solid phase change. The ironing device comprises an ironing plate, an energy storage and heat storage module assembly and a handle assembly, wherein the energy storage and heat storage module assembly and the ironing plate are arranged in an inserted and combined mode, and the handle assembly is arranged on the energy storage and heat storage module assembly. The bottom of the energy storage and heat storage module assembly is a heat exchange surface; the energy storage and heat storage module assembly is filled with fused salt phase change energy storage materials, an electric heater is arranged in the energy storage and heat storage module assembly, an electrode of the electric heater extends out of the energy storage and heat storage module assembly and is connected with a power source, more than two protruding cones are arranged on the top face of the ironing plate, and the top face of the ironing plate is connected with the power source. The energy storage and heat storage module assembly comprises a heat storage module shell, two or more upwards-concave hollow cones are arranged at the bottom of the heat storage module shell, the convex cones and the upwards-concave hollow cones are arranged in a matched mode, and the energy storage and heat storage device has the advantages of being good in heat transfer effect and convenient and fast to use, improving the working efficiency, saving energy and reducing consumption.

Description

Technical Field

[0001] The present invention relates to an ironing device with a replaceable molten salt energy storage module based on liquid-solid phase change, and relates to the technical field of commercial electrical appliances. Background Art

[0002] In the field of commercial ironing, traditional ironing equipment generally has the following forms: centralized steam ironing, which relies on consuming conventional energy to produce steam, supplies steam centrally through a steam pipe network, the ironing equipment accesses high-temperature steam, with large heat losses, huge size, complex installation, and poor flexibility; the second is an instant heat ironing device that directly uses electricity for heating. Generally, the peak electricity and flat electricity price periods are during the daytime working hours, the cost of electric heating ironing is relatively high, the energy consumption is high, and the temperature fluctuates greatly during the ironing process. It has a power cord, which is not convenient for ironing operation, and the ironing efficiency is low. Most of the time, the high-temperature ironing device is in a high-temperature state, the shell has no heat insulation, and it always dissipates heat outward during the ironing process, wasting energy and increasing the invisible ironing cost. The ratio of peak-valley-flat electricity prices in general industrial and commercial premises is relatively large (more than 1:3 on average nationwide). The existing ironing equipment cannot utilize the low-valley electricity heat storage method and has drawbacks such as high energy consumption. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an ironing device with a replaceable molten salt energy storage module based on liquid-solid phase change, which uses the low-valley electricity heat storage energy method to store heat, reduces the commercial ironing cost, optimizes the module structure design, enhances the heat transfer effect, improves the convenience of the commercial ironing process, and improves the working efficiency.

[0004] To achieve the above technical problem, the technical solution adopted by the present invention is: An ironing device with a replaceable molten salt energy storage module based on liquid-solid phase change, which includes an ironing board, an energy storage and heat storage module assembly inserted and combined with the ironing board, and a handle assembly arranged on the energy storage and heat storage module assembly; The bottom of the energy storage and heat storage module assembly is a heat transfer surface; The energy storage and heat storage module assembly is filled with a molten salt phase change energy storage material inside, an electric heater is arranged inside the energy storage and heat storage module assembly, the electrodes of the electric heater extend outside the energy storage and heat storage module assembly, and the electrodes of the electric heater are connected to a power supply.

[0005] Furthermore, two or more raised cones are arranged on the top surface of the ironing board, the energy storage and heat storage module assembly includes a heat storage module housing, and two or more upper concave hollow cones are arranged at the bottom of the heat storage module housing, and the raised cones and the upper concave hollow cones are arranged in a matching manner.

[0006] Furthermore, the height of the raised cone is flush with the highest liquid level of the molten salt phase change energy storage material in the energy storage and heat storage module assembly.

[0007] Furthermore, the outer surface of the heat storage module housing is covered with an aerogel thermal insulation layer.

[0008] Furthermore, the thickness of the aerogel thermal insulation layer is 3 - 5 mm.

[0009] Furthermore, a graphene aerogel layer arranged in a directional manner is filled on the heat exchange contact interface between the ironing board and the energy storage and heat storage module assembly.

[0010] Furthermore, a screw rod is provided on the handle assembly, a nut hole groove is provided on the energy storage and heat storage module assembly, and the screw rod is arranged in cooperation with the nut hole groove.

[0011] Furthermore, when the molten salt phase change energy storage material is filled in a liquid state, a 10% expansion space for thermal expansion and contraction is reserved at the upper part.

[0012] Furthermore, the phase change temperature point of the molten salt phase change energy storage material is between 100 - 200 °C.

[0013] Furthermore, the electric heater is immersed in the molten salt phase change energy storage material, and the electric heater is made of a corrosion - resistant alloy material.

[0014] The beneficial effects produced by adopting the above - mentioned technical solutions are as follows: This invention patent has good economic benefits by storing heat and energy during the low - valley electricity period at night, and can effectively reduce the ironing cost in commercial ironing places. The portable and movable energy storage module can be separately removed and independently store heat. The molten salt phase change heat storage module is used for heat storage (sensible heat + latent heat), which has a small volume and a large heat storage capacity. It is as convenient and fast as using a movable battery in an electric vehicle. It can be combined into an ironing device during the peak electricity price period, which is convenient and fast, and the ironing cost is low. The energy storage heat module of the commercial movable ironing device involved in this invention can effectively utilize low - valley electricity molten salt energy storage, which has great practical significance in significantly reducing.

[0015] The molten salt phase change material adopted in this invention has economic and technical advantages. The combination of latent heat and sensible heat of phase change has a large heat storage density, a small volume, low - cost and easily - available molten salt, and the phase change temperature range is within the ironing process range.

[0016] The heat transfer method of this invention is high - efficiency heat conduction. Through the special matching structure between the ironing plate and the energy storage heat module and the graphene aerogel heat - conducting interface material, the interface thermal resistance is effectively reduced, and the heat conduction efficiency is improved, enabling the heat of the energy storage module to be quickly and evenly transferred to the ironing plate to ensure the ironing effect.

[0017] The present invention utilizes off-peak electricity to heat and store energy in a molten salt phase change energy storage material. Combining the characteristic that the molten salt phase change energy storage material releases a large amount of heat during the phase change process, the efficient utilization of energy is achieved, the ironing cost is reduced, which conforms to the development concept of energy conservation and low carbon.

[0018] The present invention adopts a design with a replaceable energy storage module quickly, and the quick separation and combination realized by the polytetrafluoroethylene screw rod and nut structure are convenient and fast, improving the operation efficiency of commercial ironing, reducing the time wasted due to replacing energy or waiting for heating, being convenient and fast, having a high ironing efficiency, and adopting a combination of three groups of modules, which is convenient for heat storage and use.

[0019] The external of the energy storage heat module of the present invention adopts a high-temperature resistant aerogel thermal insulation layer, which not only ensures the safe use of the module, but also reduces heat dissipation, improves the energy utilization efficiency, and the safety protection measures of the handle assembly further guarantee the use safety. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a top view structural diagram of the present invention; Figure 3 is a top view structural diagram of the ironing board of the present invention; Figure 4 is a sectional view taken along the A-A direction of the ironing board of the present invention; Figure 5 is a top view structural diagram of the energy storage and heat storage module assembly of the present invention; Figure 6 is a sectional view taken along the B-B direction of the energy storage and heat storage module assembly of the present invention; Among them, 1. Ironing board; 101. Convex cone; 102. Heat exchange contact interface; 2. Energy storage and heat storage module assembly; 201. Heat storage module housing; 202. Upper concave hollow cone; 203. Nut hole groove; 204. Thermal insulation coating; 205. Thermal expansion and contraction space; 3. Handle assembly; 301. Screw rod; 4. Electric heater; 401. Electrode; 5. Molten salt phase change energy storage material. Detailed Embodiments

[0021] The following further describes the present invention with reference to the accompanying drawings.

[0022] As shown in the atta Figure 1-6As shown in the figure, this embodiment provides an ironing device with a replaceable molten salt energy storage module based on liquid-solid phase change, mainly aiming at the problems existing in the prior art, such as serious heat loss and poor system flexibility in the centralized steam ironing system, the instant electrothermal device being limited by the high-cost operation during peak electricity consumption periods, inaccurate temperature control, and serious heat energy dissipation. It includes an ironing board 1, an energy storage and heat storage module assembly 2 inserted and combined with the ironing board 1, and a handle assembly 3 arranged on the energy storage and heat storage module assembly 2; the bottom of the energy storage and heat storage module assembly 2 is a heat exchange surface; molten salt phase change energy storage material 5 is filled inside the energy storage and heat storage module assembly 2, an electric heater 4 is arranged inside the energy storage and heat storage module assembly, the electrode 401 of the electric heater 4 extends outside the energy storage and heat storage module assembly 2, the electrode 401 of the electric heater 4 is connected to a power source, two or more convex cones 101 are arranged on the top surface of the ironing board 1, the energy storage and heat storage module assembly 2 includes a heat storage module housing 201, two or more upper concave hollow cones 202 are arranged at the bottom of the heat storage module housing 201, and the convex cones 101 and the upper concave hollow cones 202 are arranged in a matching manner. The height of the convex cone 101 is flush with the highest liquid level of the molten salt phase change energy storage material in the energy storage and heat storage module assembly 2. The ironing board 1 is made of an engineering composite ceramic board and an alloy metal into a boat-shaped structure, and its surface is provided with convex cones 101 with the same height as the maximum liquid level of the molten salt energy storage material. The heat storage module housing 201 includes a storage tank made of a stainless steel outer shell, the storage tank is loaded with a molten salt energy storage material with a phase change temperature point between 100°C and 200°C, and a corrosion-resistant alloy electric heater 4 is embedded therein. The electrode 401 of the electric heater 4 extends to the outside of the heat storage module housing 201.At the bottom of the heat storage module housing 201, there is an upward concave hollow cone 202, which forms a complementary mating structure with the convex cone 101 on the ironing board 1. That is, at the bottom of the heat storage module housing 201, there is an upward concave hollow cone 202, which forms a geometric mating relationship with the convex cones 101 distributed on the lower surface of the ironing board 1. The convex height corresponds to the maximum liquid level height of the molten salt material. On the heat exchange contact interface 102 between the ironing board 1 and the energy storage and heat storage module assembly 2, a graphene aerogel layer arranged in a direction is filled. That is, a graphene aerogel layer is set between the ironing board 1 and the energy storage module as a thermal conductive interface material. This graphene aerogel layer is prepared by chemical vapor deposition method, contains vertical heat conduction paths and is injected with silicone elastomer. Its thickness is 3 mm and its density is 0.05 g / cm³. Through the complementary mating structure of the upward concave hollow cone 202 and the convex cone 101, several upward concave hollow cones are arranged in the corresponding area at the bottom of the heat storage module, which completely matches the convex cones on the ironing board, forming a "male-female" mating structure. On the one hand, it can effectively support and fix the ironing board, ensuring its stability and accuracy during operation. On the other hand, the contact surface is large and sufficient, realizing the efficient conduction of the heat of the energy storage module to the ironing board. The plane contact interface outside the conical contact surface can also conduct plane heat conduction, increasing the heat exchange area. The plane contact interface outside the conical contact surface can also conduct plane heat conduction. Combined with the vertical heat conduction path design of the graphene aerogel thermal conductive interface material, the interface thermal resistance is effectively reduced, realizing the efficient and uniform conduction of heat from the energy storage module to the ironing board.

[0023] The thermal conductive interface material is a graphene aerogel layer arranged in a direction filled between the high-temperature module and the ironing board. This aerogel layer grows carbon nanotubes in a direction through chemical vapor deposition (CVD) to form vertical heat conduction paths and enhance the thermal conductivity. Silicone elastomer is injected into the pores of the aerogel, which can maintain stable contact under 20% compressive deformation and adapt to the microscopic unevenness of the contact surface. The thickness of the graphene aerogel layer is 3 mm, the density is 0.05 g / cm3, the in-plane thermal conductivity > 1800 W / m·K, the vertical direction thermal conductivity > 400 W / m·K, and the interface thermal resistance is reduced by 90%. In addition, mixing graphene with other high-thermal-conductivity fillers (such as carbon nanotubes, metal particles, etc.) can produce a synergistic effect and further improve the thermal conductivity of the composite material.

[0024] The outer surface of the heat storage module housing 201 is covered with an aerogel thermal insulation layer 204. The thickness of the aerogel thermal insulation layer 204 is 3 - 5 mm. That is, except for the bottom heat exchange surface of the heat storage module housing 201, it is coated with a high-temperature-resistant aerogel thermal insulation layer with a thickness of 3 mm to 5 mm. Using the low valley electricity price period to heat and store the molten salt energy storage material, combined with the control of the heat loss of the high-temperature-resistant aerogel thermal insulation layer, the efficient utilization of energy is realized, meeting the requirements of energy conservation and low carbon.

[0025] A screw rod 301 is provided on the handle assembly 3, and a nut hole groove 203 is provided on the energy storage and heat storage module assembly 2. The screw rod 301 is cooperatively provided with the nut hole groove 203, that is, the handle assembly is provided with a screw rod nut for forming a connection structure with the energy storage module. The nut is made of polytetrafluoroethylene material and matches the connection component of the energy storage module. The quick connection structure of the polytetrafluoroethylene screw rod nut makes the replacement of the energy storage module convenient and significantly improves the efficiency of commercial ironing operations.

[0026] When the molten salt phase change energy storage material 5 is filled in a liquid state, a 10% thermal expansion and contraction space 205 is reserved at the upper part. The phase change temperature point of the molten salt phase change energy storage material 5 is between 100 and 200 °C. The electric heater 4 is completely immersed in the molten salt phase change energy storage material 5. The electric heater 4 uses a corrosion-resistant alloy material. The heating element is an electric heating rod made of a corrosion-resistant alloy and is embedded in the molten salt energy storage material. The electrode rod of the electric heating rod extends outside the storage tank. This design enables the electric heating rod to directly contact the molten salt energy storage material, achieving an efficient and uniform heating effect. The selection of the corrosion-resistant alloy effectively avoids the corrosion problem caused by long-term contact with the molten salt and extends the service life of the equipment. The arrangement of embedding the electric heating rod in the molten salt energy storage material not only improves the heating efficiency but also reduces heat loss, significantly enhancing the overall performance of the energy storage system. The design of the electrode rod extending outside the storage tank facilitates the installation, maintenance, and replacement of the electric heating rod, reducing the maintenance cost and operation difficulty. The electric heating rod can be used as a backup heating source to ensure the continuous and stable operation of the energy storage system. The electric heating rod can also adjust the heating power according to actual needs to precisely control the temperature of the energy storage material, further optimizing the operation efficiency of the energy storage module.

[0027] The working principle is as follows: The energy storage and heat storage module assembly can be used as a storage tank, with an electric heater embedded inside. The heat storage module shell is filled with a molten salt energy storage material with a phase change temperature point between 100 and 200 °C, and a concave hollow cone complementary fitting structure matching the ironing board is set. A graphene aerogel layer containing a vertical heat conduction path is filled between the ironing board and the energy storage module as a heat conduction interface material. Except for the bottom heat exchange surface, the energy storage module is covered with a high-temperature aerogel thermal insulation layer. The quick connection and disassembly are realized by using polytetrafluoroethylene screw rod nuts, which can realize the heating and energy storage of the molten salt energy storage material during the low valley electricity price period, significantly reducing the energy cost. At the same time, by optimizing the heat conduction structure and thermal insulation design, it ensures efficient and uniform heat conduction and reduces heat energy loss, meeting the requirements of high heat storage density and energy-saving and low-carbon, thus solving the problems of low energy utilization efficiency and increased operation cost of existing ironing equipment.

[0028] The present invention mainly includes a handle assembly 3, an ironing board 1, and a heat storage and heat accumulation module assembly 2. The handle assembly 3 is provided with a screw rod 301 made of polytetrafluoroethylene material, which is used for quick connection and disassembly with the heat storage energy module. A plurality of raised cones 101 are arranged on the ironing board 1, and their height is consistent with the maximum liquid level height of the molten salt energy storage material to ensure full contact of the heat exchange interface. A graphene aerogel layer prepared by chemical vapor deposition is filled between the ironing board 1 and the heat storage and heat accumulation module assembly 2. This layer is 3 mm thick, with a density of 0.05 g / cm³, contains vertical heat conduction paths and is injected with silicone elastomer to form an efficient heat conduction interface. Except for the bottom heat exchange surface, the outside of the heat storage energy module is covered with a high-temperature aerogel insulation layer with a thickness of 3 mm to 5 mm. The bottom of the heat storage and heat accumulation module assembly 2 is provided with an upper concave hollow cone 202 that matches the raised cone 101 of the ironing board 1. The two achieve close contact through "male-female" cooperation, and combined with the three-dimensional network structure of the graphene aerogel layer, effectively reduces the interfacial thermal resistance. The heat storage energy module is internally filled with a molten salt phase change energy storage material, leaving a 10% space for thermal expansion and contraction. A fully immersed electric heater 4 is arranged at the bottom, and the electrode 401 passes through the module housing to facilitate heating the energy storage during off-peak electricity hours. The polytetrafluoroethylene screw rod of the handle assembly matches the M12 nut hole groove at the top of the module. Its self-lubricity and corrosion resistance ensure quick disassembly and assembly operations. Through the coordinated operation of multiple technologies such as heating energy storage during off-peak electricity, graphene aerogel enhanced heat conduction, and high-temperature insulation layer heat insulation, efficient and uniform heat conduction from the energy storage module to the ironing board is realized, enabling the device to have the advantages of high energy density and low cost in the ironing temperature range of 100°C to 200°C.

[0029] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An ironing device with a replaceable molten salt energy storage module based on liquid-solid phase change, characterized in that, It includes an ironing board (1), an energy storage and heat accumulation module assembly (2) inserted and combined with the ironing board (1), and a handle assembly (3) arranged on the energy storage and heat accumulation module assembly (2); The bottom of the energy storage and heat accumulation module assembly (2) is a heat exchange surface; The energy storage and heat accumulation module assembly (2) is filled with molten salt phase change energy storage material (5) inside. An electric heater (4) is arranged inside the energy storage and heat accumulation module assembly. Electrodes (401) of the electric heater (4) extend outside the energy storage and heat accumulation module assembly (2), and the electrodes (401) of the electric heater (4) are connected to a power source.

2. The ironing device of a replaceable molten salt energy storage module based on liquid-solid phase change according to claim 1, characterized in that, Two or more convex cones (101) are arranged on the top surface of the ironing board (1). The energy storage and heat accumulation module assembly (2) includes a heat accumulation module housing (201). Two or more upper concave hollow cones (202) are arranged at the bottom of the heat accumulation module housing (201), and the convex cones (101) and the upper concave hollow cones (202) are arranged in a matching manner.

3. The ironing device of a replaceable molten salt energy storage module based on liquid-solid phase change according to claim 2, characterized in that, The height of the convex cone (101) is flush with the highest liquid level of the molten salt phase change energy storage material in the energy storage and heat accumulation module assembly (2).

4. An ironing device of a replaceable molten salt energy storage module based on liquid-solid phase change according to claim 2, characterized in that, The outer surface of the heat accumulation module housing (201) is covered with an aerogel thermal insulation layer (204).

5. The ironing device of a replaceable molten salt energy storage module based on liquid-solid phase change according to claim 4, characterized in that The thickness of the aerogel thermal insulation layer (204) is 3 - 5 mm.

6. The ironing device of a replaceable molten salt energy storage module based on liquid-solid phase change according to claim 2, characterized in that, A graphene aerogel layer arranged in an oriented manner is filled on the heat exchange contact interface (102) between the ironing board (1) and the energy storage and heat accumulation module assembly (2).

7. An ironing device with a replaceable molten salt energy storage module based on liquid-solid phase change according to claim 1, characterized in that, A screw rod (301) is arranged on the handle assembly (3), and a nut hole groove (203) is arranged on the energy storage and heat accumulation module assembly (2). The screw rod (301) and the nut hole groove (203) are arranged in a matching manner.

8. The ironing device of a replaceable molten salt energy storage module based on liquid-solid phase change according to claim 1, characterized in that, When the molten salt phase change energy storage material (5) is filled in a liquid state, a 10% expansion space (205) for thermal expansion and contraction is reserved at the upper part.

9. The ironing device of a replaceable molten salt energy storage module based on liquid-solid phase change according to claim 1, characterized in that, The phase change temperature point of the molten salt phase change energy storage material (5) is between 100 °C and 200 °C.

10. The ironing device of a replaceable molten salt energy storage module based on liquid-solid phase change according to claim 1, characterized in that, The electric heater (4) is immersed in the molten salt phase change energy storage material (5), and the electric heater (4) is made of a corrosion-resistant alloy material.

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