Composite-structured fabric with a radiative cooling and supercooling sensation

Abstract

Relates to the technical field of composite fabrics, and in particular provides a composite fabric structure with a radiative refrigeration and supercooling sensation. 【Solution means】The composite fabric structure with a radiative refrigeration and supercooling sensation consists of, from top to bottom, a radiative refrigeration layer 1, a thin film transfer layer 2, and a support layer 3 in sequence. The radiative refrigeration layer and the support layer are made of fibers, and through holes are distributed on the surface of the thin film transfer layer. The fibers of the radiative refrigeration layer and the support layer are both filled in the through holes. The heat absorption film of the composite fabric structure of the present utility model and the heat absorption particles added to the support layer can collect heat and increase the temperature below the radiative refrigeration layer, enabling the radiative refrigeration layer to have a higher radiative potential energy. Also, since heat is quickly transmitted to the radiative refrigeration layer through the heat transfer film, the radiative refrigeration layer can continuously have a high-output radiative refrigeration function.

Description

Technical Field

[0001] Radiative cooling achieves the purpose of cooling by radiating the heat of an object in the form of electromagnetic waves to a cooling source, and its main advantage is that there is no need to input other forms of energy. At normal environmental temperatures, a blackbody radiator emits infrared rays of 8 - 13 μm. In order to achieve the purpose of refrigeration, the energy in this part can be radiated to a cold source. For objects on the earth's surface, outer space can be regarded as a natural transparent window of 8 - 13 μm. Radiative cooling radiates heat into outer space through the atmospheric window, which is energy-saving and pollution-free.

[0002] By adding a radiative cooling material to fibers to make a fabric, the fabric can be given the ability of radiative cooling. Generally, a radiative cooling fabric is a single fabric, and the radiative cooling material is uniformly dispersed throughout the fabric. However, the radiative cooling material in such a single fabric cannot accumulate heat sufficiently when the temperature difference is small, and there is an upper limit to the radiative power, so the effect of radiative cooling is not obvious.

[0003] In the radiative cooling structure disclosed in Chinese Patent CN210602331U, the radiative cooling layer has a first surface with undulations, which is advantageous for increasing the surface area of radiative cooling and enhancing the radiative cooling effect per unit area. However, this radiative cooling structure also has the problem that the upper limit of radiative power is low due to the inability to accumulate sufficient heat as described above. In addition, in this radiative cooling structure, there is a problem that the interface contact between each layer is not strong. After long-term use, layer separation may occur, and the radiative cooling effect may decrease or disappear.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Conventional radiative cooling fabrics have an upper limit on the effect of radiative cooling. Since the multi-layer radiative cooling structure is prone to layer separation, the effect of radiative cooling decreases. In response to the above problems, the present utility model provides a composite structure fabric with a radiative cooling supercooling sensation. The composite structure fabric with the radiative cooling supercooling sensation includes, from top to bottom, a radiative cooling layer, a thin film transfer layer, and a support layer in sequence. The radiative cooling layer and the support layer are made of fibers. Through holes are distributed on the surface of the thin film transfer layer, and the fibers of the radiative cooling layer and the support layer are both filled in the through holes.

[0005] In the composite structure fabric of the present utility model, since the fibers of the radiative cooling layer and the support layer are filled in the through holes, the bonding between layers can be enhanced, and the problem of layer separation is less likely to occur even after long-term use.

[0006] Furthermore, based on the above solution, the thin film transfer layer consists of a heat transfer film and an endothermic film. The heat transfer film is located on the side of the radiative cooling layer, and the endothermic film is located on the side of the support layer. The edges of the heat transfer film and the endothermic film are fixed and connected, and a cavity is formed between the two. The fibers of the radiative cooling layer and the support layer are filled in the cavity. By providing a cavity in the middle of the thin film transfer layer and filling the fibers of the radiative cooling layer and the support layer in this cavity, the interaction between the radiative cooling layer, the support layer, and the thin film transfer layer can be further enhanced, and the integrity can be further improved.

[0007] Specifically, in order to achieve the supercooling sensation of high-power radiative cooling, the composite structure fabric of the present utility model adds radiative cooling particles to the fibers of the radiative cooling layer, adds endothermic particles to the fibers of the support layer, adds heat conduction particles to the heat transfer film, and adds endothermic particles to the endothermic film. Among them, the radiative cooling particles are one or more combinations of SiO2, SiC, TiO2, ZnO, ZnS, BaSO4, AI2O3, and BN. The endothermic particles are one or more combinations of ATO, GTO, ITO, graphene, carbon nanotubes, iron oxide, and polyimide. The heat conduction particles are one or more combinations of aluminum powder, copper powder, silver powder, graphite powder, and short carbon fiber.

[0008] Specifically, the materials of the fibers of the radiative cooling layer and the support layer are each one of PE, PP, PA6, PA66 or PET, and the material of the thin film transfer layer is one of PE, PP, PVC or PLA.

[0009] The beneficial effects of this utility model are that the heat absorption film of the composite structure fabric of this utility model and the heat absorption particles added to the support layer can collect heat and increase the temperature below the radiative cooling layer, enabling the radiative cooling layer to have a higher radiative potential energy. Also, since heat is quickly transmitted to the radiative cooling layer through the heat transfer film, the radiative cooling layer can continuously have a high-output radiative cooling function. When the external temperature drops, the radiative power of the radiative cooling layer drops to zero, and the heat absorption particles continue to absorb and accumulate heat. At the same time, the air in the cavity also plays a heat insulation role. Therefore, the novel composite structure fabric of this utility model can realize the functions of heat absorption and heat storage.

[0010] The composite structure fabric of this utility model can be used in outdoor and sunshade fields such as curtains, tents, jackets, etc. If the composite structure fabric of this utility model is adopted on the outermost layer, radiative cooling at high temperatures and heat absorption and heat preservation at low temperatures can be realized. Also, the composite structure fabric of this utility model can be used in bedding such as futons. When the temperature inside is relatively high and the temperature difference from the room temperature becomes large, the radiative cooling layer can radiate heat into the room and achieve a certain cooling effect.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0012] Hereinafter, the present utility model will be described with reference to embodiments. However, the embodiments are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0013] Embodiment 1: It is a composite structure fabric having a radiative refrigeration supercooling feeling. As shown in FIG. 1, the composite structure fabric includes, from top to bottom, a radiative refrigeration layer 1, a thin film transmission layer 2, and a support layer 3 in sequence. The thickness of the radiative refrigeration layer 1 is 10 mm, the thickness of the thin film transmission layer 2 is 2 mm, and the thickness of the support layer 3 is 7 mm. The radiative refrigeration layer 1 is a PE fiber with a fineness of 60 D, and 2.5 wt% of SiO2 and 2.5 wt% of SiC are added. The thin film transmission layer 2 is a PE film, and 2 wt% of carbon nanotubes, 2 wt% of graphite powder, and 2 wt% of copper powder are added. The support layer 3 is a PA6 fiber with a fineness of 75 D, and 1 wt% of GTO, 1 wt% of graphene, and 2 wt% of Fe2O3 are added. As shown in FIGS. 2 and 3, through holes 21 are distributed on the surface of the thin film transmission layer 2, and the fibers of the radiative refrigeration layer 1 and the support layer 3 are all filled in the through holes 21.

[0014] Embodiment 2: It is a composite structured fabric with a radiative refrigeration supercooling sensation. As shown in Figure 1, from top to bottom, the composite structured fabric sequentially includes a radiative refrigeration layer 1, a thin film transfer layer 2, and a support layer 3. The thickness of the radiative refrigeration layer 1 is 5 mm, the thickness of the thin film transfer layer 2 is 0.8 mm, and the thickness of the support layer 3 is 4 mm. The radiative refrigeration layer 1 is made of PA66 fibers with a fineness of 30 D, and 1 wt% of SiO2, 1 wt% of SiC, and 2 wt% of ZnS are added. The support layer 3 is made of PET fibers with a fineness of 25 D, and 1 wt% of graphene, 1 wt% of polyimide, and 1 wt% of ITO are added. As shown in Figures 3 and 4, the thin film transfer layer 2 is composed of a heat transfer film 22 and a heat absorption film 23. The heat transfer film 22 is arranged on the side of the radiative refrigeration layer 1, and the heat absorption film 23 is arranged on the side of the support layer 3. The edges of the heat transfer film 22 and the heat absorption film 23 are fixed and connected, and a cavity 24 is formed between them. Through holes 21 are distributed on the surface of the thin film transfer layer 2. The fibers of the radiative refrigeration layer 1 and the support layer 3 pass through the through holes 21 and are filled in the cavity 24. The heat transfer film 22 is a PLA film, and 1 wt% of 0.1 mm carbon fiber short fibers, 1.5 wt% of copper powder, and 1.5 wt% of aluminum powder are added. The heat absorption film 23 is a PLA film, and 1 wt% of ATO, 1 wt% of polyimide, and 1 wt% of carbon nanotubes are added.

[0015] The above is only a preferred embodiment of the present utility model and does not limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. based on the spirit and principle of the present utility model are all included in the protection scope of the present utility model.

Description of Reference Numerals

[0016] 1, radiative refrigeration layer; 2, thin film transfer layer; 21, through hole; 22, heat transfer film; 23, heat absorption film; 24, cavity; 3, support layer.

Claims

1. From top to bottom, it successively includes a radiation refrigeration layer (1), a thin film transmission layer (2), and a support layer (3). The radiation refrigeration layer (1) and the support layer (3) are made of fibers. Through holes (21) are distributed on the surface of the thin film transmission layer (2), and the fibers of the radiation refrigeration layer (1) and the support layer (3) are both filled in the through holes (21). A composite structure fabric having a radiation refrigeration supercooling feeling, characterized in that.

2. The thin film transmission layer (2) is composed of a heat transfer film (22) and a heat absorption film (23). The heat transfer film (22) is located on the side of the radiation refrigeration layer (1), the heat absorption film (23) is located on the side of the support layer (3), the edges of the heat transfer film (22) and the heat absorption film (23) are fixed and connected, and a cavity (24) is formed between the two. The composite structure fabric having a radiation refrigeration supercooling feeling according to Claim 1, characterized in that.

3. The fibers of the radiation refrigeration layer (1) and the support layer (3) are filled in the cavity (24). The composite structure fabric having a radiation refrigeration supercooling feeling according to Claim 2, characterized in that.

4. The thickness ratio of the radiation refrigeration layer (1), the thin film transmission layer (2), and the support layer (3) is 1:(0.1 - 0.3):(0.7 - 1.3). The composite structure fabric having a radiation refrigeration supercooling feeling according to any one of Claims 1 to 3, characterized in that.

5. Radiation refrigeration particles are added to the fibers of the radiation refrigeration layer (1), heat absorption particles are added to the fibers of the support layer (3), heat conduction particles are added to the heat transfer film (22), and heat absorption particles are added to the heat absorption film. The composite structure fabric having a radiation refrigeration supercooling feeling according to Claim 4, characterized in that.

6. The materials of the fibers of the radiation refrigeration layer (1) and the support layer (3) are each one of PE, PP, PA6, PA66 or PET. The composite structure fabric having a radiation refrigeration supercooling feeling according to Claim 5, characterized in that.

7. The material of the thin film transmission layer (2) is one of PE, PP, PVC or PLA. The composite structure fabric having a radiation refrigeration supercooling feeling according to Claim 5, characterized in that.

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