Outdoor folding heating device based on phase change material

Abstract

The utility model belongs to an outdoor heat preservation device, and particularly relates to an outdoor folding heating device based on a phase change material, which comprises a plurality of heat preservation plates, and the heat preservation plates are folding plates and can be in a completely folded state. When being in a completely unfolded state, the insulation board is used as a heating ground mat; when in a semi-unfolded state, the heat preservation plate is used as a heat preservation shed; the heat preservation plate in the completely-unfolded state and the heat preservation plate in the semi-unfolded state are spliced to form a heating device body, and openings in the two ends of the heating device body are sealed through storage packaging bags to form a sealed heating device. The heating device is flexible and multipurpose, meanwhile, the heat preservation plate is a folding plate, can be completely folded when not in use, is convenient to carry and store, and can be spliced when in use, so that the heating device is convenient and fast to use; meanwhile, the phase-change material in the insulation board is combined with the ceramic heating sheet, so that the heat can be continuously preserved for 6-10 hours under the condition that the comfortable temperature of a human body is met.

Description

Technical Field

[0001] The utility model belongs to an outdoor heat preservation device, and particularly relates to an outdoor folding heating device based on a phase change material. Background Art

[0002] Outdoor heating is a basic survival guarantee requirement for people in special environments. For example, in extreme conditions, refugee resettlement after natural disasters and war disasters; under daily conditions, wild camping, outdoor overnight stays, etc. Especially in seasons and weather with large temperature differences between day and night, the importance of heating is self-evident.

[0003] Currently, relatively common heating devices include sleeping bags, tents, and some traditional cotton products. The usage methods of these heating devices are relatively single. Sleeping bags are generally in an inflated form, and tents are generally used after being supported. On the one hand, these heating devices cannot adjust the heating method according to the needs of users. On the other hand, the activity space for users is relatively limited, and they cannot meet the needs of users to turn over during sleep at night. Finally, the heating methods of these devices generally rely on traditional cotton products covering the users to ensure heating. Even if some products are filled with heat preservation materials, they still rely on maintaining the environmental temperature inside the sleeping bag and reducing heat loss to achieve heat preservation. This is difficult to provide good heating effects in low-temperature environments at night. Spending the night in a low-temperature environment requires not only good heat preservation effects but also a heat source that can release heat to meet people's heating needs. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to propose a heating device based on a phase change material, which has a large space contraction ratio and can bring users a comfortable outdoor night sleep experience: adopting a thick plate folding structure, which is convenient for storage when not in use, but can be converted into a space that is convenient for users to turn over during sleep; energy-saving, environmentally friendly, safe and having a good heating effect: without open fire and fully utilizing natural resources, based on an environmentally friendly phase change material for material structure compounding, absorbing solar energy and stably and slowly releasing heat at night to provide users with a long-term heating effect.

[0005] An outdoor folding heating device based on a phase change material, comprising a plurality of heat preservation boards. The heat preservation boards are folding boards and can achieve a fully folded state. The middle of the heat preservation boards in the fully folded state is encapsulated by a storage packaging bag;

[0006] When the heat preservation boards are in a fully unfolded state, they are used as a heating floor mat, and the storage packaging bag is spread on the heating floor mat for heat preservation;

[0007] When the heat preservation boards are in a semi-unfolded state, they are used as a heat preservation shed, and the two open ends of the heat preservation shed are respectively closed by the storage packaging bag;

[0008] The heat preservation board in the fully unfolded state and the heat preservation board in the semi-unfolded state are assembled to form the main body of the heating device, and the two open ends of the main body of the heating device are respectively sealed with storage packaging bags to form a closed heating device.

[0009] The storage packaging bag has wear-resistant Oxford cloth on the outside and an aluminum film with heat preservation function on the inside.

[0010] The heat preservation board is composed of multiple board units connected by an axis structure. The board units are composed of an isosceles trapezoidal board, a right trapezoidal board, and an isosceles triangular board, and are connected by an axis structure; there are 2 isosceles triangular boards, and the isosceles trapezoidal board is in the middle, and its two ends are respectively connected to the two isosceles triangular boards by an axis structure. The two ends of the two isosceles triangular boards are respectively connected to the right trapezoidal board by an axis structure to finally form a board unit; when the board units are connected, the adjacent isosceles trapezoidal boards and the right trapezoidal boards are connected by their long sides or short sides to realize folding.

[0011] The axis structure includes a connecting rod, and several card slot structures are arranged above the connecting rod. The card slot structures and the connecting rod are of an integral structure. The card slot structures are symmetrically divided into 2 card slots along the connecting rod. The isosceles trapezoidal board, the right trapezoidal board, and the isosceles triangular board are respectively provided with card holes, and the card holes are clamped on the card slots to realize the connection and mutual rotation between the isosceles trapezoidal board, the right trapezoidal board, and the isosceles triangular board.

[0012] The heat preservation board realizes the fully folded state, the semi-unfolded state or the fully unfolded state by adjusting the angles of α, β, and θ. An angle α is formed between the isosceles trapezoidal board and the vertical plane, an angle β is formed between the isosceles trapezoidal board and the bottom edge of the adjacent isosceles triangular board, and the base angle of the isosceles trapezoidal board is θ. α, β, and θ satisfy the formula:

[0013]

[0014] In the formula, α ∈ [0°, 90°], β ∈ [0°, 180°], θ ∈ [30°, 60°].

[0015] The isosceles trapezoidal board, the right trapezoidal board, and the isosceles triangular board are all composed of a PE outer shell, a heat-insulating aerogel felt, a ceramic heating sheet, a heat-dissipating copper foil, a high-enthalpy phase-change material package, and a graphene-coated fabric. The PE outer shell is arranged on the outermost side, and the heat-insulating aerogel felt, the ceramic heating sheet, the heat-dissipating copper foil, the high-enthalpy phase-change material package, and the graphene-coated fabric are sequentially arranged on its inner side. The high-enthalpy phase-change material package stores heat by using solar energy; the ceramic heating sheet is connected to a photovoltaic cell, the photovoltaic cell is connected to a photovoltaic panel, and the photovoltaic panel converts light energy into electrical energy to supply power to the photovoltaic cell.

[0016] The photovoltaic panels are spaced and embedded in the inner edges of the isosceles trapezoidal board, the right trapezoidal board, or the isosceles triangular board at the edge of the heat preservation board.

[0017] A plurality of the ceramic heating sheets are provided, and the plurality of ceramic heating sheets are placed at intervals between the heat-insulating aerogel felt and the heat-dissipating copper foil.

[0018] A usage method of an outdoor folding heating device based on a phase change material is realized based on the above device, and specifically includes the following steps:

[0019] Step 1: During the day, the fully folded thermal insulation board wrapped in a storage packaging bag is completely unfolded and laid in the sun, and the high-enthalpy phase change material package and the photovoltaic panel are used for heat storage. After heat storage, the thermal insulation board is folded into a fully folded state and wrapped with a storage packaging bag for standby;

[0020] Step 2: At night, the fully unfolded thermal insulation board is used as a heating mat, and a person lies on it. At the same time, the storage packaging bag is used as a covering for warmth;

[0021] Or the semi-unfolded thermal insulation board is used as a heat preservation shed, and the two openings of the heat preservation shed are sealed by using a storage packaging bag;

[0022] Or one of the fully unfolded thermal insulation boards is used as a heating mat, and the other thermal insulation boards form a semi-unfolded state to form a heat preservation shed. The heat preservation shed is placed on the heating mat to form the main body of the heating device, and both ends of the main body of the heating device are respectively closed by using a storage packaging bag to form a closed heating device;

[0023] Wherein when the thermal insulation board is used as a heating mat, the graphene-coated fabric is located on the outermost side and contacts the human body. When the thermal insulation board is used as a heat preservation shed, the PE outer shell is located on the uppermost side and contacts the external air;

[0024] Step 3: During use, a person is placed in the heating mat or the heat preservation shed or the closed heating device described in Step 2. When the temperature in the heating mat or the heat preservation shed or the closed heating device reaches the phase change temperature of the high-enthalpy phase change material package, the high-enthalpy phase change material package solidifies and maintains a stable heat release at the phase change temperature. At the same time, the photovoltaic cell supplies power to the ceramic heating sheet to make it work, and the ceramic heating sheet continuously releases heat to supply heat to the high-enthalpy phase change material package, prolonging the solidification process of the phase change material and forming a long-term and stable heat supply to the human body.

[0025] The beneficial effects of the present utility model are as follows:

[0026] 1. The insulation board of the present application can be in different states to meet the heating needs of different environments and people. When the insulation board is in a fully unfolded state, it can be used as a heating mat; it can also be in a semi-unfolded state as a heat preservation shed; at the same time, the insulation boards in the fully unfolded state and the semi-unfolded state can be assembled with each other to form the main body of the heating device. The two open ends of the main body of the heating device are respectively sealed with storage packaging bags to form a closed heating device. The heating device of the present application is flexible and versatile. At the same time, the insulation board is a folding board, which can be fully folded when not in use. The folding structure has a large space contraction ratio, which is more convenient to carry and store compared with traditional heating products such as sleeping bags. When in use, it can be assembled conveniently and quickly; and the number of board units in the insulation board is not limited, and the number of overall assembled insulation boards is not limited. Different sizes of heating devices can be assembled according to the user's needs. At the same time, the closed heating device built by multiple insulation boards is stable, which can reduce heat consumption. The heating device of the present application can adjust the rest space according to the human body's needs, ensuring that users have a comfortable sleeping space.

[0027] 2. The insulation board of the present application fully utilizes solar energy as the energy source. The insulation board of the present application is composed of a PE shell, a heat-insulating aerogel felt, a ceramic heating sheet, a heat-dissipating copper foil, a high-enthalpy phase-change material package, and a graphene-coated fabric. The ceramic heating sheet is connected to a photovoltaic cell, and the photovoltaic cell is connected to a photovoltaic panel; first, the high-enthalpy phase-change material package stores and releases heat, directly converting solar energy into heat energy to provide for the human body, which is more environmentally friendly.

[0028] At the same time, the use of the ceramic heating sheet converts solar energy into electrical energy to provide additional heat flow for the phase-change material, greatly improving the stable heat release time of the phase-change material and ensuring the all-night heating effect.

[0029] 3. The PE shell and the heat-insulating aerogel felt of the insulation board of the present application can prevent heat dissipation. The heat-dissipating copper foil and the graphene-coated fabric achieve efficient heat transfer, forming unidirectional heat release, enabling the heating space to form a closed-space heat internal circulation to the greatest extent and reducing the influence of outdoor low temperature. In the case of an outdoor environmental temperature of -10°C, the high-enthalpy phase-change material package solidifies and releases heat. When it reaches the phase-change temperature, it will liquefy and absorb heat. At this time, the ceramic heating sheet is started, and the photovoltaic panel provides electrical energy for the photovoltaic cell, thereby supplying power to the ceramic heating sheet. The fully charged photovoltaic cell can meet the temperature of the ceramic heating sheet at 60°C for 3.7 hours. The ceramic heating sheet can provide additional heat flow for the phase-change material module, thereby overall extending the heat release time to meet the human body's comfortable temperature of 22 - 28°C, and can continuously maintain heat for 6 to 10 hours under the condition of meeting the human body's comfortable temperature of 22 - 28°C, showing a significant performance improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of the fully folded state of the insulation board of the present utility model;

[0031] Figure 2 Structural schematic diagram of the fully unfolded state of the thermal insulation board of the present utility model;

[0032] Figure 3 Structural schematic diagram of the incompletely folded state of the thermal insulation board of the present utility model;

[0033] Figure 4 Schematic diagram of the thermal insulation board used as a heating floor mat;

[0034] Figure 5 Schematic diagram of the thermal insulation board used as a thermal insulation shed;

[0035] Figure 6 Schematic diagram of the thermal insulation board used as an enclosed heating device;

[0036] Figure 7 Shaft structural schematic diagram of the thermal insulation board of the present utility model;

[0037] Figure 8 Composition structure diagram of the isosceles trapezoidal plate or right trapezoidal plate or isosceles triangular plate in the thermal insulation board of the present utility model;

[0038] Figure 9 Heating circuit diagram of the ceramic heating sheet of the thermal insulation board of the present utility model;

[0039] Figure 10 Flow schematic diagram of the thermal insulation board of the present utility model used as an enclosed heating device;

[0040] Figure 11 Comparison chart of the heat preservation time of the thermal insulation board with only phase change material and the thermal insulation board with ceramic heating sheet in the environment with an outdoor temperature of -10°C of the present utility model;

[0041] In the attached drawings: 1. Thermal insulation board; 101. Isosceles trapezoidal plate; 102. Right trapezoidal plate; 103. Isosceles triangular plate; 2. PE outer shell; 3. Heat insulation aerogel felt; 4. Ceramic heating sheet; 5. Heat dissipation copper foil; 6. High enthalpy phase change material package; 7. Graphene coated fabric; 8. Photovoltaic cell; 9. Photovoltaic panel; 10. Shaft structure; 1001. Connecting rod; 1002. Card slot structure; 1003. Card slot; 1004. Card hole; 11. Thermal insulation shed; 12. Heating floor mat; 13. Storage packaging bag. Detailed implementation manners

[0042] The present utility model will be described in detail below with reference to the attached drawings.

[0043] As Figures 1-6As shown in the figure, an outdoor folding heating device based on phase change materials includes a plurality of heat preservation boards 1, and the heat preservation boards 1 are folding boards; the heat preservation boards can be presented in three different states, namely, a fully folded state, a fully unfolded state, and a semi-unfolded state, and different folding states directly or in combination form different heating devices.

[0044] As Figure 1 shown, the heat preservation board 1 can achieve a fully folded state, and the middle of the fully folded heat preservation board 1 is encapsulated by a storage packaging bag 13;

[0045] Embodiment 1

[0046] As Figure 2 、 4 shown, when the heat preservation board 1 is in a fully unfolded state, it is used as a heating mat 12, and a storage packaging bag 13 is laid on the heating mat 12 for heat preservation;

[0047] The usage method of the heating mat in this embodiment includes the following steps:

[0048] Step 1: During the day, the fully folded heat preservation board 1 wrapped by the storage packaging bag 13 is fully unfolded and laid in the sun, and the high-enthalpy phase change material package 6 and the photovoltaic panel 9 store heat; after heat storage, the heat preservation board 1 is folded into a fully folded state and wrapped with the storage packaging bag 13 for standby. The combined action of the PE outer shell 2 of the wrapped heat preservation board 1 and the storage packaging bag 13 can ensure that the heat of the high-enthalpy phase change material package 6 after heat storage will not be lost, and ensure that the high-enthalpy phase change material package 6 will not solidify and release heat in advance before the heat preservation board 1 is used.

[0049] Step 2: At night, the fully unfolded heat preservation board 1 is used as a heating mat 12, and a person lies on it and at the same time uses the storage packaging bag 13 as a covering for warmth; among them, the graphene-coated fabric 7 is located on the outermost side and contacts the human body;

[0050] Step 3: When in use, a person is placed in the heating mat 12 described in Step 2. When the temperature in the heating mat 12 reaches the phase change temperature of the high-enthalpy phase change material package 6, the high-enthalpy phase change material package 6 solidifies and maintains a stable heat release at the phase change temperature. At the same time, the photovoltaic cell 8 supplies power to the ceramic heating sheet 4 to make it work, and the ceramic heating sheet 4 continuously releases heat to supply heat to the high-enthalpy phase change material package 6, extending the solidification process of the phase change material and forming a long-term stable heat supply to the human body.

[0051] Embodiment 2

[0052] As Figure 3 and Figure 5 shown, when the heat preservation board 1 is in a semi-unfolded state, it is used as a heat preservation shed 11, and the storage packaging bag 13 is used to seal the two open ends of the heat preservation shed 11 respectively;

[0053] The usage method of the heat preservation shed in this embodiment includes the following steps:

[0054] Step 1: During the day, the completely folded heat preservation board 1 wrapped by the storage packaging bag 13 is fully unfolded and laid in the sun, and the high-enthalpy phase change material pack 6 and the photovoltaic panel 9 store heat; after heat storage, the heat preservation board 1 is folded into a completely folded state and wrapped with the storage packaging bag 13 for standby. The combined action of the PE outer shell 2 of the wrapped heat preservation board 1 and the storage packaging bag 13 can ensure that the heat of the high-enthalpy phase change material pack 6 after heat storage will not be dissipated, and ensure that the high-enthalpy phase change material pack 6 will not solidify and release heat in advance before the heat preservation board 1 is used.

[0055] Step 2: At night, the semi-unfolded heat preservation board 1 is used as the heat preservation shed 11. The two openings of the heat preservation shed 11 are sealed with the storage packaging bag 13. Among them, the PE outer shell 2 is located on the uppermost side and contacts the external air;

[0056] Step 3: When in use, the human body is placed in the heat preservation shed 11 described in Step 2. When the temperature in the heat preservation shed 11 reaches the phase change temperature of the high-enthalpy phase change material pack 6, the high-enthalpy phase change material pack 6 solidifies and maintains a stable heat release at the phase change temperature. At the same time, the photovoltaic cell 8 powers the ceramic heating sheet 4 to make it work, and the ceramic heating sheet 4 continuously releases heat to supply heat to the high-enthalpy phase change material pack 6, prolonging the solidification process of the phase change material and forming a long-term stable heat supply to the human body.

[0057] Embodiment 3

[0058] As Figure 6 shown, the completely unfolded heat preservation board 1 and the semi-unfolded heat preservation board 1 are assembled to form the main body of the heating device. The two openings at both ends of the main body of the heating device are respectively closed with the storage packaging bag 13 to form a closed heating device; in this embodiment, there is one completely unfolded heat preservation board 1 and two semi-unfolded heat preservation boards 1. The semi-unfolded heat preservation boards 1 are assembled with each other and placed on the completely unfolded heat preservation board 1 to form the main body of the heating device. Among them, the two semi-unfolded heat preservation boards 1 are connected by the shaft structure 10, and the assembled two semi-unfolded heat preservation boards 1 and the completely unfolded heat preservation board 1 can be connected by straps.

[0059] As Figure 10 shown, the usage method of the closed heating device in this embodiment includes the following steps:

[0060] Step 1: During the day, the fully folded thermal insulation board 1 wrapped by the storage packaging bag 13 is completely unfolded and laid in the sun, and the high enthalpy phase change material pack 6 and the photovoltaic panel 9 store heat. After heat storage, the thermal insulation board 1 is folded into a fully folded state and wrapped by the storage packaging bag 13 for standby. The combined effect of the PE outer shell 2 of the wrapped thermal insulation board 1 and the storage packaging bag 13 can ensure that the heat of the high enthalpy phase change material pack 6 after heat storage will not be dissipated, and ensure that the high enthalpy phase change material pack 6 will not solidify and release heat in advance before the thermal insulation board 1 is used.

[0061] Step 2: At night, one of the fully unfolded thermal insulation boards 1 is used as a heating mat 12, and the other thermal insulation boards 1 form a semi-unfolded state to form a heat preservation shed 11. The heat preservation shed 11 is placed on the heating mat 12 to form the main body of the heating device. Both ends of the main body of the heating device are respectively closed by the storage packaging bag 13 to form a closed heating device.

[0062] When the thermal insulation board 1 is used as a heating mat 12, the graphene-coated fabric 7 is located on the outermost side and contacts the human body. When the thermal insulation board 1 is used as a heat preservation shed 11, the PE outer shell 2 is located on the uppermost side and contacts the external air.

[0063] Step 3: When in use, the human body is placed in the closed heating device described in Step 2. When the temperature in the closed heating device reaches the phase change temperature of the high enthalpy phase change material pack 6, the high enthalpy phase change material pack 6 solidifies and maintains a stable heat release at the phase change temperature. At the same time, the photovoltaic cell 8 supplies power to the ceramic heating sheet 4 to make it work, and the ceramic heating sheet 4 continuously releases heat to supply heat to the high enthalpy phase change material pack 6, extending the solidification process of the phase change material and forming a long-term stable heat supply to the human body.

[0064] Example 4

[0065] The storage packaging bag 13 has a wear-resistant Oxford fabric on the outside and an aluminized film with heat preservation function on the inside.

[0066] As Figures 1-6 shown, the thermal insulation board 1 is composed of multiple board units connected by a shaft structure 10. In this embodiment, it is composed of 5 board units connected. The board unit is composed of an isosceles trapezoidal board 101, a right trapezoidal board 102, and an isosceles triangular board 103, and is connected by the shaft structure 10. There are 2 isosceles triangular boards 103. The isosceles trapezoidal board 101 is located in the middle, and its two ends are respectively connected to the two isosceles triangular boards 103 through the shaft structure 10. The two ends of the two isosceles triangular boards 103 are respectively connected to the right trapezoidal board 102 through the shaft structure 10 to finally form the board unit. When connecting the board units, the adjacent isosceles trapezoidal boards 101 and the right trapezoidal boards 102 are connected by the long sides or the short sides to achieve folding.

[0067] As Figure 7As shown, the shaft structure 10 includes a connecting rod 1001. Above the connecting rod 1001, there are several card slot structures 1002. The card slot structures 1002 and the connecting rod 1001 are of an integral structure. The card slot structures 1002 are symmetrically divided into two card slots 1003 along the connecting rod 1001. The isosceles trapezoidal plate 101, the right trapezoidal plate 102, and the isosceles triangular plate 103 are respectively provided with card holes 1004. The card holes 1004 are clamped on the card slots 1003 to realize the connection and mutual rotation between the isosceles trapezoidal plate 101, the right trapezoidal plate 102, and the isosceles triangular plate 103. When the connections between the isosceles trapezoidal plate 101, the right trapezoidal plate 102, and the isosceles triangular plate 103 connected by the shaft structure 10 are flattened, they are flush with the plane. This is not only friendly to the human body during laying but also not easily damaged. At the same time, the connections are kept tight to reduce heat loss caused by connection gaps. The shaft structure of this application is integrally formed, using a snap connection, with simple assembly, and uses a simple and reliable rotating pair, and the movement process is stable and smooth.

[0068] As Figures 1-3 shown, the heat preservation board 1 realizes the fully folded state, the semi-expanded state, or the fully expanded state by adjusting the angles of α, β, and θ. An angle α is formed between the isosceles trapezoidal plate 101 and the plumb plane. An angle β is formed between the isosceles trapezoidal plate 101 and the base of the adjacent isosceles triangular plate 103. The base angle of the isosceles trapezoidal plate 101 is θ. α, β, and θ satisfy the formula:

[0069]

[0070] In the formula, α ∈ [0°, 90°], β ∈ [0°, 180°], θ ∈ [30°, 60°].

[0071] In this embodiment, θ = 45 °C is taken. When the heat preservation board 1 is in the fully folded state, α = 0 °C and β = 90 °C. When the heat preservation board 1 is in the not fully folded state, α = 65.5 °C and β = 135 °C. When the heat preservation board 1 is in the fully expanded state, α = 90 °C and β = 180 °C.

[0072] As Figures 8-9 shown, the isosceles trapezoidal plate 101, the right trapezoidal plate 102, and the isosceles triangular plate 103 are all composed of a PE shell 2, a heat-insulating aerogel felt 3, a ceramic heating sheet 4, a heat-dissipating copper foil 5, a high-enthalpy phase-change material package 6, and a graphene-coated fabric 7. The PE shell 2 is arranged on the outermost side, and the heat-insulating aerogel felt 3, the ceramic heating sheet 4, the heat-dissipating copper foil 5, the high-enthalpy phase-change material package 6, and the graphene-coated fabric 7 are sequentially arranged on its inner side. The ceramic heating sheet 4 is connected to a photovoltaic cell 8, the photovoltaic cell 8 is connected to a photovoltaic panel 9, and the photovoltaic panel 9 is embedded at intervals in the inner edge of the isosceles trapezoidal plate 101 or the right trapezoidal plate 102 or the isosceles triangular plate 103 at the edge of the heat preservation board 1. The photovoltaic panel 9 converts light energy into electrical energy to supply power to the photovoltaic cell 8;

[0073] In this embodiment, the thermal conductivity of the PE shell 2 is 0.3 W / m 2 , the thickness is 3 mm, the thermal conductivity of the heat-insulating aerogel pad 3 is 0.00042 W / m 2 , the thickness is 10 mm, the thermal conductivity of the heat-dissipating copper foil 5 is 400 W / m 2 , the thickness is 0.05 mm, the thermal conductivity of the graphene-coated fabric 7 is 2 W / m 2 , the thickness is 1 mm.

[0074] The phase change material in the high-enthalpy phase change material package 6 is paraffin with a phase change temperature of 28°C; there are different phase change temperature options for the phase change paraffin material, such as 28, 23 and other temperatures. In this embodiment, paraffin with a phase change temperature of 28°C is selected, that is, the material is liquid above 28°C, and the temperature change is not very different from that of ordinary materials. When the temperature reaches 28°C, the paraffin will slowly release heat at this temperature and gradually start to solidify until it is completely solidified, and then the temperature gradually drops below 28°C. Choosing this phase change temperature is to keep the temperature at 28°C for a long time. After a certain amount of heat loss, the space temperature can be maintained at about 25°C for a long time, which is the most comfortable temperature for the human body.

[0075] A plurality of ceramic heating sheets 4 are provided, and the plurality of ceramic heating sheets 4 are placed at intervals between the heat-insulating aerogel felt 3 and the heat-dissipating copper foil 5.

[0076] The heat preservation board of the present utility model can form different states to meet the heating needs of different environments and people. When the heat preservation board is in a fully unfolded state, it is used as a heating floor mat; it can also be in a semi-unfolded state as a heat preservation shed; at the same time, the heat preservation boards in the fully unfolded state and the semi-unfolded state can be assembled with each other to form the main body of the heating device. The two ends of the main body of the heating device are respectively sealed with storage packaging bags to form a closed heating device. The heating device of the present application is flexible and versatile. At the same time, the heat preservation board is a folding board, which can be completely folded when not in use. The folding structure has a large space contraction ratio, which is more convenient to carry and store than traditional heating products such as sleeping bags. When in use, it can be assembled conveniently and quickly; and the number of board units in the heat preservation board is not limited, and the number of overall assemblies of the heat preservation board is not limited. Different sizes of heating devices can be assembled according to the user's needs. At the same time, the closed heating device built by multiple heat preservation boards is stable and can reduce heat consumption. The heating device of the present application can adjust the rest space according to the human body's needs, ensuring that the user has a comfortable sleeping space.

[0077] Phase change materials have become ideal heat storage media due to their high heat storage density and controllable phase change temperature, and are also the best green environmental protection carriers. Phase change materials can release or absorb a large amount of heat during the phase change process. Compared with traditional heat storage materials, they can store more thermal energy under the same volume or mass. However, for phase change materials, without any assistance, when the external environmental temperature is low, the heat release time to reach the comfortable human body temperature of 28°C is very short. Therefore, phase change materials are not suitable to be used alone as heating materials outdoors.

[0078] The heat preservation board 1 of the present application realizes relatively small heat dissipation to the outside through the heat insulation aerogel felt and the PE shell on the outside, and realizes efficient heat transfer inside through the heat dissipation copper foil 5 and the graphene-coated fabric 7, forming unidirectional heat release, so that the heating space can form the most closed space heat internal circulation to reduce the influence of outdoor low temperature; the high enthalpy phase change material package 6 uses a phase change paraffin material with a phase change temperature of 28°C, liquefying and absorbing heat above 28°C and solidifying and releasing heat below 28°C. When the outdoor environmental temperature is -10°C, the heat release time that the material module can continuously reach 28°C is less than 2 hours at this time; at this time, the ceramic heating element 4 is started, and the photovoltaic panel 9 is stacked on the edge block of the heat preservation board 1, and the solar energy is converted into electrical energy and stored in the photovoltaic battery 8, so as to supply power to the ceramic heating element 4. The fully charged photovoltaic battery 8 can maintain the temperature of the ceramic heating element 4 at 60°C for 3.7 hours; the ceramic heating element 4 can provide additional heat flow for the phase change material module, so as to extend the heat release time at 28°C as a whole, and can maintain heat for 6 to 10 hours under the condition of the comfortable human body temperature of 22-28°C, showing a significant performance improvement.

[0079] Such as Figure 11As shown, through Ansys simulation, with the insulation board 1 structure of the present utility model, on the basis of using phase change materials, a certain amount of electricity generated from solar energy is added, which can greatly extend the usage duration and temperature range. Through precise calculation, in an outdoor environment with a temperature of -10°C, after being irradiated by the sun, the insulation board 1 reaches 50°C. From 50°C to the rapid cooling stage of 28°C, there is no obvious difference in the heat release time between the insulation board with only phase change materials and the insulation board of this application provided with a ceramic heating sheet. However, in the phase change heat release stage, the time satisfying 22 - 28°C is extended from less than 2 hours initially to 6 to 10 hours, showing a significant performance improvement. Behind this performance improvement is the optimization effect of electric energy on the performance of phase change materials. Although introducing electric energy requires a certain amount of energy consumption, about 0.001 kWh, this consumption is of great significance for improving the performance of phase change materials in extremely cold environments. More importantly, according to the research on the human comfort environment temperature, 22 - 28°C is the most suitable temperature range for the human body to feel. After electric compensation, the phase change materials can be maintained within this temperature range for a long time, thus meeting the human body's demand for a comfortable environment. This heat storage system combining electric energy and phase change materials not only improves the duration of the heat storage performance, ensures that the temperature is maintained within a suitable range, but also provides a more reliable and efficient solution for practical applications.

Claims

1. An outdoor folding heating device based on phase change material, characterized in that: It includes a plurality of insulation boards, the insulation boards are foldable boards, the insulation boards can be fully folded, and the middle of the insulation boards in the fully folded state are packaged with a storage packaging bag; When the insulation board is in a fully unfolded state, it is used as a heating mat, and a storage bag is placed on top of the heating mat to keep it warm; When the insulation board is in a semi-expanded state, it is used as an insulation shed, and the openings at both ends of the insulation shed are respectively sealed with storage packaging bags; The insulation board in the fully expanded state and the insulation board in the semi-expanded state are assembled to form a heating device body, and the openings at both ends of the heating device body are respectively sealed with storage packaging bags to form a closed heating device.

2. The outdoor folding heating device based on phase change material according to claim 1, characterized in that: The storage packaging bag has a wear-resistant Oxford cloth on the outside and an aluminum film with heat-insulating effect on the inside.

3. The outdoor folding heating device based on phase change material according to claim 1, characterized in that: The insulation board is formed by multiple board units connected by an axis structure, and the board units are composed of isosceles trapezoidal boards, right-angled trapezoidal boards, and isosceles triangular boards, and are connected by an axis structure; two isosceles triangular boards are arranged, and the isosceles trapezoidal board is located in the middle, and its two ends are respectively connected to two isosceles triangular boards by an axis structure, and the two ends of the two isosceles triangular boards are respectively connected to the right-angled trapezoidal boards by an axis structure to finally form a board unit; when the board units are connected, adjacent isosceles trapezoidal boards and right-angled trapezoidal boards are connected to each other by long sides or short sides to achieve folding.

4. The outdoor folding heating device based on phase change material according to claim 3 is characterized in that: The shaft structure includes a connecting rod, and a plurality of slot structures are arranged above the connecting rod. The slot structure and the connecting rod are an integrated structure. The slot structure is symmetrically divided into two slots along the connecting rod. The isosceles trapezoidal plate, the right-angled trapezoidal plate, and the isosceles triangular plate are respectively provided with slots, and the slots are connected to the slots to realize the connection and mutual rotation between the isosceles trapezoidal plate, the right-angled trapezoidal plate, and the isosceles triangular plate.

5. The outdoor folding heating device based on phase change material according to claim 3 is characterized in that: The insulation board can be in a fully folded state, a half-expanded state or a fully expanded state by adjusting the angles α, β and θ. An angle α is formed between the isosceles trapezoidal board and the vertical plane. An angle β is formed between the isosceles trapezoidal board and the base of the adjacent isosceles triangle board. The base angle of the isosceles trapezoidal board is θ. α, β and θ satisfy the formula: Where, α∈[0°, 90°], β∈[0°, 180°], θ∈[30°, 60°].

6. The outdoor folding heating device based on phase change material according to claim 3, characterized in that: The isosceles trapezoidal plate, right-angled trapezoidal plate and isosceles triangular plate are all composed of a PE shell, an insulating aerogel felt, a ceramic heating sheet, a heat dissipation copper foil, a high enthalpy phase change material package and a graphene coated cloth. The PE shell is arranged on the outermost side, and the inner side thereof is sequentially arranged with the insulating aerogel felt, the ceramic heating sheet, the heat dissipation copper foil, the high enthalpy phase change material package and the graphene coated cloth. The high enthalpy phase change material package utilizes solar energy to store heat; the ceramic heating sheet is connected to a photovoltaic cell, the photovoltaic cell is connected to a photovoltaic panel, and the photovoltaic panel converts light energy into electrical energy to power the photovoltaic cell.

7. The outdoor folding heating device based on phase change material according to claim 6, characterized in that: The photovoltaic panels are embedded at intervals in the inner edges of the isosceles trapezoidal panels, right-angled trapezoidal panels or isosceles triangular panels at the edges of the thermal insulation panels.

8. The outdoor folding heating device based on phase change material according to claim 6, characterized in that: The ceramic heating sheets are provided in plurality, and the plurality of ceramic heating sheets are placed at intervals between the heat-insulating aerogel felt and the heat-dissipating copper foil.

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