Refrigeration equipment, vacuum insulated panel core material, vacuum insulated panel and manufacturing method of vacuum insulated panel

Abstract

The invention relates to the technical field of vacuum heat insulation materials, and provides refrigeration equipment, a vacuum heat insulation plate core material, a vacuum heat insulation plate and a manufacturing method of the vacuum heat insulation plate, and the vacuum heat insulation plate core material comprises a plurality of fiber layers which are arranged in a stacked mode; the gas circulation pipe network is clamped between every two adjacent fiber layers, the gas circulation pipe network comprises a gas circulation main pipe and a plurality of gas circulation branch pipe networks, and the gas circulation branch pipe networks are sequentially connected to the gas circulation main pipe in the gas flowing direction of the gas circulation main pipe; the gas circulation main pipe and each gas circulation branch pipe network are provided with gas inlet holes. A tiny gas channel network is constructed in the vacuum heat insulation plate core material, gas is guided to efficiently flow deep in the vacuum heat insulation plate core material, and the flowability of gas molecules can be remarkably improved. In this way, rapid exhaust of gas in the core material is effectively promoted, then the ultimate vacuum degree of the vacuum insulation panel is improved, and finally the heat conductivity can be further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum insulation materials, and in particular to a refrigeration device, a core material of a vacuum insulation panel, a vacuum insulation panel and a manufacturing method thereof. Background Art

[0002] A vacuum insulation panel (VIP) is a new type of insulation board that has developed rapidly in recent years. It reduces air heat convection by using a high vacuum inside, reduces solid heat conduction by using a low thermal conductivity core material, and increases the inhibition of radiative convection while acting as a water and gas barrier to maintain the vacuum degree by using a high-reflection barrier film, so that the internal heat transfer is minimized and it becomes a low thermal conductivity material widely applicable in the fields of refrigerators, ships, aviation, buildings, etc. The core material of the vacuum insulation panel in the related art is usually made of organic fibers, and the thermal conductivity of the vacuum insulation panel with organic fibers as the core material is generally high, and the insulation performance is poor, making it difficult to meet the current industrial / commercial requirements for the performance of the vacuum insulation panel. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the related art. For this purpose, the present invention provides a core material of a vacuum insulation panel, which can remove components such as water vapor, small molecule gases and large molecule gases adsorbed on the surface and inside of the fiber layer as much as possible, reduce the thermal conductivity of the fiber layer, and improve the insulation performance.

[0004] The present invention also provides a vacuum insulation panel.

[0005] The core material of the vacuum insulation panel according to the first aspect embodiment of the present invention includes: A plurality of fiber layers, which are stacked; A gas circulation pipe network, which is clamped between two adjacent fiber layers. The gas circulation pipe network includes a gas circulation main pipe and a plurality of gas circulation branch pipe networks. The plurality of gas circulation branch pipe networks are sequentially connected to the gas circulation main pipe along the gas flow direction of the gas circulation main pipe. The gas circulation main pipe and each gas circulation branch pipe network are provided with air inlet holes.

[0006] According to an embodiment of the present invention, each gas circulation branch pipe network includes a primary gas circulation pipeline and a plurality of secondary gas circulation pipelines. The primary gas circulation pipeline is connected to the gas circulation main pipe, and the plurality of secondary gas circulation pipelines are sequentially connected to the primary gas circulation pipeline along the gas flow direction of the primary gas circulation pipeline.

[0007] According to an embodiment of the present invention, each of the secondary gas flow pipelines includes a secondary gas flow pipe body and a plurality of tertiary gas flow pipe bodies. The secondary gas flow pipe body is connected to the primary gas flow pipeline, and the plurality of tertiary gas flow pipe bodies are sequentially connected to the secondary gas flow pipe body along the gas flow direction of the secondary gas flow pipe body.

[0008] According to an embodiment of the present invention, the primary gas flow pipeline is disposed at an acute angle with the main gas flow pipeline; and / or, the secondary gas flow pipeline is disposed at an acute angle with the primary gas flow pipeline.

[0009] According to an embodiment of the present invention, a first spiral groove extending spirally along the length direction is provided on the inner wall of the main gas flow pipeline; and / or, a second spiral groove extending spirally along the length direction is provided on the inner wall of the primary gas flow pipeline; and / or, a third spiral groove extending spirally along the length direction is provided on the inner wall of the secondary gas flow pipeline.

[0010] According to an embodiment of the present invention, the diameter of the main gas flow pipeline is less than or equal to 1 mm, and the wall thickness is greater than or equal to 50 μm and less than or equal to 100 μm; and / or, the diameter of the primary gas flow pipeline is less than or equal to 1 mm, and the wall thickness is greater than or equal to 50 μm and less than or equal to 100 μm; and / or, the diameter of the secondary gas flow pipeline is less than or equal to 1 mm, and the wall thickness is greater than or equal to 50 μm and less than or equal to 100 μm.

[0011] According to an embodiment of the present invention, the aperture diameter of the air inlet hole is greater than or equal to 10 μm and less than or equal to 50 μm; and / or, the density of the air inlet holes is 200 - 500 holes / cm 2 .

[0012] According to an embodiment of the present invention, the material of the gas flow pipe network is an organic polymer material, a metal material or a ceramic material.

[0013] The vacuum insulation panel according to the second aspect embodiment of the present invention includes: a vacuum barrier film bag and the above-mentioned vacuum insulation panel core material, and the vacuum insulation panel core material is vacuum-sealed in the vacuum barrier film bag.

[0014] According to an embodiment of the present invention, it further includes: An exhaust pipe, the exhaust pipe is provided with a vent hole, the exhaust pipe is located on the side of the vacuum insulation panel core material, and the gas flow direction of the exhaust pipe is the same as the gas flow direction of the main gas flow pipeline.

[0015] A method for manufacturing a vacuum insulation panel according to an embodiment of the third aspect of the present invention includes: Placing the core material of the vacuum insulation panel into the vacuum barrier film bag, wherein the air outlet of the main gas flow pipe is oriented towards the opening of the vacuum barrier film bag; Vacuumizing the vacuum barrier film bag and sealing the opening to form the vacuum insulation panel.

[0016] A refrigeration device according to an embodiment of the fourth aspect of the present invention includes a box body and the above-mentioned vacuum insulation panel, and the vacuum insulation panel is installed inside the box body.

[0017] One or more of the above technical solutions in the embodiments of the present invention have at least one of the following technical effects: The gas flow pipe network is arranged between two adjacent fiber layers, thereby constructing a tiny gas channel network inside the core material of the vacuum insulation panel to guide the gas to flow efficiently deep inside the core material of the vacuum insulation panel, which can significantly improve the mobility of gas molecules. In this way, without changing the existing production process and the overall structure of the core material, the rapid discharge of gas inside the core material is effectively promoted, thereby improving the ultimate vacuum degree of the vacuum insulation panel, and finally the thermal conductivity can be further reduced.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of the core material of the vacuum insulation panel provided by the embodiment of the present invention.

[0021] Figure 2 It is one of the schematic structural diagrams of the gas flow pipe network provided by the embodiment of the present invention.

[0022] Figure 3 It is another schematic structural diagram of the gas flow pipe network provided by the embodiment of the present invention.

[0023] Figure 4 It is a flowchart of the method for manufacturing the vacuum insulation panel provided by the embodiment of the present invention.

[0024] Reference Signs: 1. Fiber layer; 2. Gas circulation pipe network; 21. Main gas circulation pipe; 22. Branch gas circulation pipe network; 221. Primary gas circulation pipeline; 222. Secondary gas circulation pipeline; 2221. Secondary gas circulation pipe body; 2222. Tertiary gas circulation pipe body; 23. Air inlet hole. Detailed implementation mode

[0025] The following further describes in detail the implementation mode of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0026] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0028] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower horizontal height than the second feature.

[0029] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0030] As a highly efficient thermal insulation material, the compactness of the core structure of the vacuum insulation panel (VIP) has become a major obstacle to improving the thermal insulation performance. Specifically, the core material is mainly composed of phenolic resin and organic fibers. The fiber diameter is very small (with an average of 5 - 20 microns), the porosity is relatively low (generally below 90%), and the distribution is uneven, which makes it difficult for the internal gas to be discharged. The traditional fiber core material forms a complex microporous structure (with a pore diameter between 0.1 - 1 micron) due to the interlacing of fibers, which greatly hinders the diffusion of gas molecules. Experimental data reveals that when the density of the core material exceeds 180 kilograms per cubic meter, the evacuation time needs to be increased by more than 40% additionally.

[0031] In addition, the organic fiber contains hydroxyl functional groups and has a strong adsorption capacity for water molecules, with an adsorption amount of up to 3 - 5%. Even under the condition that the vacuum degree reaches 10 Pa, there will still be gas adsorbed in a monolayer molecule remaining inside the core material, which will cause the thermal conductivity to increase by 0.001 - 0.002 watts per meter·Kelvin. Moreover, the existing core material processing equipment has deficiencies in density control, and there are density deviations in more than 30% of the areas, resulting in some local areas being too dense. Tests show that in areas where the density difference exceeds 15%, the vacuum degree fluctuation can reach ±20 Pa, seriously affecting the uniformity of the VIP.

[0032] In the related art, nano-silica (with a pore diameter of 10 - 50 nanometers) is compounded with glass fiber to increase the total porosity to 94.5% and shorten the vacuum pumping time by 35%. Another method is to optimize the arrangement of organic fibers, mixing fibers with different diameters (5 - 50 microns) to increase the proportion of gas channels. In addition, the density deviation of the core material is controlled within ±5% through biaxial differential motion. In terms of pretreatment technology, the vacuum heating method can desorb more than 90% of the physically adsorbed gas under specific conditions (80 - 120 degrees Celsius, 10⁻¹ Pa, for 2 - 4 hours). However, the above technical solutions are either complex in process, or increase production costs, or extend the production cycle, having a greater impact on the existing production line. Therefore, while pursuing the improvement of VIP performance, it is also necessary to balance these factors to find a solution that is both efficient and economical.

[0033] As Figure 1 and Figure 2 shown, the core material of the vacuum insulation panel in the embodiment of the present invention includes: a plurality of fiber layers 1 and a gas circulation pipe network 2. Among them, the plurality of fiber layers 1 are stacked; the gas circulation pipe network 2 is sandwiched between two adjacent fiber layers 1. The gas circulation pipe network 2 includes a gas circulation main pipe 21 and a plurality of gas circulation branch pipe networks 22. The plurality of gas circulation branch pipe networks 22 are sequentially connected to the gas circulation main pipe 21 along the gas flow direction of the gas circulation main pipe 21. The gas circulation main pipe 21 and each gas circulation branch pipe network 22 are provided with air inlet holes 23.

[0034] It should be noted that the plurality of fiber layers 1 form the main body of the core material of the vacuum insulation panel by stacking. The material of the fiber layer 1 can be glass fiber, ceramic fiber or organic fiber (such as polyester fiber). The number of fiber layers 1 can be selected according to the heat insulation requirements and is not specifically limited herein.

[0035] It can be understood that the gas circulation pipe network 2 is responsible for collecting components such as water vapor, small molecule gases and large molecule gases adsorbed on the surfaces and inside of the two adjacent fiber layers 1 to it. The gas circulation pipe network 2 can cover the entire cross-section of the fiber layer 1. Among them, the gas circulation pipe network 2 includes a gas circulation main pipe 21 and a plurality of gas circulation branch pipe networks 22. That is to say, the gas collected by each gas circulation branch pipe network 22 can enter the gas circulation main pipe 21 and be discharged through the gas circulation main pipe 21, so as to ensure that the gas flows in a certain direction and improve the gas discharge efficiency.

[0036] It should be particularly pointed out that, in order to improve the gas collection effect, the number of the gas circulation pipe networks 2 can be multiple. For example, a gas circulation pipe network 2 is provided between two adjacent fiber layers 1, or each fiber layer 1 is sandwiched between two gas circulation pipe networks 2, and two adjacent fiber layers 1 can share a gas circulation pipe network 2.

[0037] It should be noted that the gas enters the gas flow branch pipe network 22 through the air inlet holes 23 on the gas flow branch pipe network 22, and the gas can also enter the gas flow main pipe 21 through the air inlet holes 23 on the gas flow main pipe 21, so as to improve the exhaust efficiency. In addition, the gas flow main pipe 21 may not be provided with the air inlet holes 23, and only the gas flow branch pipe network 22 is provided with the air inlet holes 23.

[0038] In practical applications, the gas flow pipe network 2 is arranged between two adjacent fiber layers 1, so as to construct a tiny gas channel network inside the vacuum insulation panel core material, guide the gas to flow efficiently deep inside the vacuum insulation panel core material, and significantly improve the mobility of gas molecules. In this way, on the basis of not changing the existing production process and the overall structure of the core material, the rapid discharge of gas inside the core material is effectively promoted, and then the ultimate vacuum degree of the vacuum insulation panel (VIP) is improved, and finally the further reduction of the thermal conductivity can be achieved.

[0039] To improve the gas collection efficiency, as Figure 1 and Figure 2 shown, each gas flow branch pipe network 22 includes a first-level gas flow pipeline 221 and a plurality of second-level gas flow pipelines 222. The first-level gas flow pipeline 221 is connected to the gas flow main pipe 21, and the plurality of second-level gas flow pipelines 222 are sequentially connected to the first-level gas flow pipeline 221 along the gas flow direction of the first-level gas flow pipeline 221.

[0040] It should be noted that a plurality of first-level gas flow pipelines 221 are sequentially connected to the gas flow main pipe 21 along the length direction of the gas flow main pipe 21. Exemplarily, the number of the first-level gas flow pipelines 221 is four. The four first-level gas flow pipelines 221 are sequentially arranged at intervals along the length direction of the gas flow main pipe 21. Two of the four first-level gas flow pipelines 221 are located on one side of the gas flow main pipe 21, and the other two of the four first-level gas flow pipelines 221 are located on the other side of the gas flow main pipe 21. In other words, the first first-level gas flow pipeline 221 and the third first-level gas flow pipeline 221 among the four first-level gas flow pipelines 221 are arranged on the same side, and the second first-level gas flow pipeline 221 and the fourth first-level gas flow pipeline 221 among the four first-level gas flow pipelines 221 are arranged on the same side.

[0041] It can be understood that the primary gas flow pipeline 221 serves as the secondary main channel of the gas flow branch pipe network 22. The secondary gas flow pipelines 222 are sequentially connected along the gas flow direction of the primary gas flow pipeline 221 to form multiple branch structures. The layout form of the secondary gas flow pipelines 222 relative to the primary gas flow pipeline 221 can refer to the layout form of the primary gas flow pipeline 221 relative to the main gas flow pipeline 21, which will not be elaborated here.

[0042] It should be particularly noted here that each gas flow branch pipe network 22 can only include the primary gas flow pipeline 221, that is to say, the gas flow branch pipe network 22 can not include the secondary gas flow pipelines 222.

[0043] To further improve the gas collection efficiency, as Figure 1 、 Figure 2 and Figure 3 shown, each secondary gas flow pipeline 222 includes a secondary gas flow pipe body 2221 and multiple tertiary gas flow pipe bodies 2222. The secondary gas flow pipe body 2221 is connected to the primary gas flow pipeline 221, and the multiple tertiary gas flow pipe bodies 2222 are sequentially connected to the secondary gas flow pipe body 2221 along the gas flow direction of the secondary gas flow pipe body 2221.

[0044] It should be noted that the secondary gas flow pipe body 2221 serves as the tertiary main channel of the gas flow branch pipe network 22. The tertiary gas flow pipe bodies 2222 are sequentially connected along the gas flow direction of the secondary gas flow pipe body 2221 to form multiple branch structures. Among them, the layout form of the tertiary gas flow pipe bodies 2222 relative to the secondary gas flow pipe body 2221 can refer to the layout form of the secondary gas flow pipelines 222 relative to the primary gas flow pipeline 221, which will not be elaborated here.

[0045] It should be particularly noted here that the tertiary gas flow pipe bodies 2222 can further serve as the quaternary main channels in the gas flow branch pipe network 22. Its structure not only includes the pipe body itself, but also can add branches on the pipe body itself. Based on this design logic, the gas flow pipe network 2 can be iteratively extended to form a multi-level branch system. By adopting a bionic fractal structure similar to the shape of a tree, the macroscopic structure of the gas flow pipe network 2 is optimized, its branch levels are gradually refined and interconnected, thereby significantly increasing the contact area between the gas flow pipe network 2 and the fiber layer 1 and improving the gas collection efficiency.

[0046] As Figure 1 、 Figure 2 and Figure 3As shown, the primary gas flow pipeline 221 is arranged at an acute angle with the main gas flow pipeline 21. Exemplarily, the angle between the primary gas flow pipeline 221 and the main gas flow pipeline 21 is 30 degrees, 40 degrees, 50 degrees or 60 degrees. Similarly, the angle between the secondary gas flow pipe body 2221 and the primary gas flow pipeline 221 is 30 degrees, 40 degrees, 50 degrees or 60 degrees. Likewise, the angle between the tertiary gas flow pipe body 2222 and the secondary gas flow pipe body 2221 is 30 degrees, 40 degrees, 50 degrees or 60 degrees.

[0047] It should be noted that the connection point between the primary gas flow pipeline 221 and the main gas flow pipeline 21, the connection point between the secondary gas flow pipeline 222 and the primary gas flow pipeline 221, and the connection point between the tertiary gas flow pipe body 2222 and the secondary gas flow pipe body 2221 are collectively referred to as cross nodes. These nodes adopt a "Y-shaped" bifurcation structure, which can reduce the gas flow resistance, avoid the turbulence caused by right-angle turns, and improve the channel connectivity.

[0048] In addition, the cross-sections of the main gas flow pipeline 21, the primary gas flow pipeline 221, the secondary gas flow pipe body 2221 and the tertiary gas flow pipe body 2222 are all set to be quasi-circular (such as circular or elliptical) to reduce the frictional resistance between the gas and the pipe wall, thereby significantly improving the gas flow efficiency.

[0049] In practical applications, a first helical groove extending spirally along the length direction is provided on the inner wall of the main gas flow pipeline 21. Similarly, a second helical groove extending spirally along the length direction is provided on the inner wall of the primary gas flow pipeline 221. Similarly, a third helical groove extending spirally along the length direction is provided on the inner wall of the secondary gas flow pipeline 222. In other words, a third helical groove extending spirally along the length direction is provided on the inner walls of the secondary gas flow pipe body 2221 and the tertiary gas flow pipe body 2222.

[0050] Specifically, a first helical groove is provided along the length direction on the inner wall of the main gas flow pipeline 21 to guide the gas to form a swirling flow through the helical morphology. A second helical groove is provided along the length direction on the inner wall of the primary gas flow pipeline 221 to cooperate with the first helical groove of the main gas flow pipeline 21 to enhance the local turbulence intensity. Third helical grooves are provided on the inner walls of both the secondary gas flow pipe body 2221 and the tertiary gas flow pipe body 2222, extending spirally along the length direction to form a multi-stage turbulence induction structure. That is to say, by providing helical grooves on the inner wall, the gas is forced to generate a helical motion during the flow process, significantly enhancing the turbulence effect.

[0051] In an alternative embodiment, the diameter of the main gas flow pipe 21 is less than or equal to 1 mm, and the wall thickness is greater than or equal to 50 μm and less than or equal to 100 μm. Exemplarily, the diameter of the main gas flow pipe 21 is 0.2 mm, 0.5 mm, 0.7 mm or 1 mm, and the wall thickness of the main gas flow pipe 21 is 50 μm, 60 μm, 80 μm or 100 μm. Similarly, the diameter of the primary gas flow pipeline 221 is less than or equal to 1 mm, and the wall thickness is greater than or equal to 50 μm and less than or equal to 100 μm. Similarly, the diameter of the secondary gas flow pipeline 222 is less than or equal to 1 mm, and the wall thickness is greater than or equal to 50 μm and less than or equal to 100 μm. In other words, the diameters of the secondary gas flow pipe body 2221 and the tertiary gas flow pipe body 2222 are less than or equal to 1 mm, and the wall thicknesses are greater than or equal to 50 μm and less than or equal to 100 μm.

[0052] It should be noted that the diameters of the main gas flow pipe 21, the primary gas flow pipeline 221, the secondary gas flow pipe body 2221 and the tertiary gas flow pipe body 2222 can be equal, and the wall thicknesses of the main gas flow pipe 21, the primary gas flow pipeline 221, the secondary gas flow pipe body 2221 and the tertiary gas flow pipe body 2222 can be equal.

[0053] In an alternative embodiment, the aperture diameter of the air inlet hole 23 is greater than or equal to 10 μm and less than or equal to 50 μm. Exemplarily, the air inlet hole 23 can be a circular hole, a square hole or an oval hole, and the aperture diameter of the air inlet hole 23 is 10 μm, 20 μm, 30 μm, 40 μm or 50 μm. In addition, the aperture diameters of the air inlet holes 23 on the main gas flow pipe 21, the primary gas flow pipeline 221, the secondary gas flow pipe body 2221 and the tertiary gas flow pipe body 2222 can be the same.

[0054] In an alternative embodiment, the density of the air inlet holes 23 is 200 - 500 holes / cm 2 Exemplarily, the density of the air inlet holes 23 is 200 holes / cm 2 、300 holes / cm 2 、400 holes / cm 2 or 500 holes / cm 2 .

[0055] In an alternative embodiment, the material of the gas flow pipe network 2 is an organic polymer material, a metal material or a ceramic material. Among them, the organic polymer material can be PTFE (polytetrafluoroethylene), ABS (acrylonitrile-butadiene-styrene), PI (polyimide), PS (polystyrene), etc.

[0056] In addition, an embodiment of the present invention further provides a vacuum insulation panel, comprising: a vacuum barrier film bag and a vacuum insulation panel core material, and the vacuum insulation panel core material is vacuum-sealed in the vacuum barrier film bag.

[0057] It should be noted that the vacuum barrier film bag can be made of a multi-layer composite metal foil (such as aluminum foil / stainless steel foil) or a high-barrier polymer film (such as EVOH, PVDC), and has an extremely low gas permeability. The vacuum barrier film bag can be edge-sealed through high-frequency welding or hot-melt sealing process to ensure long-term vacuum retention ability.

[0058] Specifically, since the vacuum insulation panel includes the vacuum insulation panel core material as above, and the specific structure of the vacuum insulation panel core material refers to the above embodiment, the vacuum insulation panel shown in this embodiment includes all the technical solutions of the above embodiment. Therefore, it has at least all the beneficial effects obtained by the above all technical solutions, which will not be elaborated one by one here.

[0059] In an alternative embodiment, the vacuum insulation panel further includes an exhaust pipe. Wherein, the exhaust pipe is provided with ventilation holes, the ventilation holes can be circular holes, and the number of ventilation holes is multiple. Gas enters the exhaust pipe through the ventilation holes and is then discharged through the exhaust pipe. The exhaust pipe is located on the side of the vacuum insulation panel core material, and the gas flow direction of the exhaust pipe is the same as the gas flow direction of the gas circulation main pipe 21. It should be particularly noted that the outer diameter of the exhaust pipe is less than or equal to the height of the vacuum insulation panel core material.

[0060] Wherein, the material of the exhaust pipe is an organic polymer material, a metal material or a ceramic material, and the organic polymer material can be PTFE (polytetrafluoroethylene), ABS (acrylonitrile-butadiene-styrene), PI (polyimide), PS (polystyrene), etc.

[0061] Exemplarily, the vacuum insulation panel core material has opposite first and second sides, and third and fourth sides located between the first and second sides. The third and fourth sides are arranged opposite to each other, and the fourth side is close to the seal opening of the vacuum barrier film bag. At this time, at least one of the first and second sides is provided with an exhaust pipe, or alternatively, the first, second and third sides are all provided with exhaust pipes, and the exhaust pipe is a U-shaped structural member. In this way, the effect of collecting gas can be further improved.

[0062] In addition, as Figure 4 shown, an embodiment of the present invention further provides a manufacturing method of a vacuum insulation panel, comprising: S100, putting the vacuum insulation panel core material into the vacuum barrier film bag, wherein the air outlet of the gas circulation main pipe 21 faces the opening of the vacuum barrier film bag.

[0063] Among them, when placing the core material of the vacuum insulation panel into the vacuum barrier film bag, the exhaust pipe can be placed at the side position of the core material of the vacuum insulation panel. In addition, the air outlets of the main gas flow pipe 21 and the exhaust pipe both face the opening of the vacuum barrier film bag.

[0064] S200, evacuate the vacuum barrier film bag and seal the opening to form a vacuum insulation panel.

[0065] Among them, the gas collected in the main gas flow pipe 21 and the exhaust pipe is extracted through the corresponding air outlets. Exemplarily, when the air pressure inside the vacuum barrier film bag reaches 0.02 - 10 Pa, the opening of the vacuum barrier film bag is encapsulated, and a closed space is formed inside the vacuum barrier film bag.

[0066] It should be particularly noted that during the process of evacuating the vacuum barrier film bag, it can include two evacuations. The first evacuation is after placing the core material of the vacuum insulation panel and the exhaust pipe inside the vacuum barrier film bag. When the air pressure inside reaches 0.02 - 10 Pa, the vacuum barrier film bag is encapsulated to form a closed space. The second evacuation is carried out after the vacuum insulation panel after the first encapsulation is left standing at room temperature for a period of time. Here, the period of time can be 24 hours or more. The vacuum insulation panel after standing is cut open along the seal, the vacuum insulation panel is placed in a vacuum chamber, the gas flow pipe network 2 and the exhaust pipe inside the vacuum barrier film bag are evacuated, and a secondary evacuation is carried out. When the internal air pressure reaches 0.02 - 10 Pa again, it is sealed again to prepare the vacuum insulation panel in the embodiment of the present invention.

[0067] In addition, the embodiment of the present invention also provides a refrigeration device, including a box body and a vacuum insulation panel, and the vacuum insulation panel is installed inside the box body. Among them, the refrigeration device can be a refrigerator, a freezer, a cold storage room, a refrigerated transport vehicle, etc., which is not specifically limited here.

[0068] Specifically, since the refrigeration device includes the above-mentioned vacuum insulation panel, and the specific structure of the vacuum insulation panel refers to the above embodiment, the refrigeration device shown in this embodiment includes all the technical solutions of the above embodiment. Therefore, it has at least all the beneficial effects obtained by all the above technical solutions, which will not be elaborated one by one here.

[0069] In some embodiments of the present invention, the above-mentioned vacuum insulation panel is applied to a ship as an insulation material in the ship. In some embodiments of the present invention, the above-mentioned vacuum insulation panel is applied to an aviation device as an insulation material in the aviation device. In some embodiments of the present invention, the above-mentioned vacuum insulation panel is applied to building materials as a heat insulation material in the building materials. These ships, aviation devices or building materials have all the characteristics and advantages of the above-described vacuum insulation panel.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications, or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should all be covered within the scope of the claims of the present invention.

Claims

1. A core material for a vacuum insulation panel, characterized in that, Comprising: A plurality of fiber layers (1), the plurality of fiber layers (1) being stacked; A gas flow pipe network (2), the gas flow pipe network (2) being sandwiched between two adjacent fiber layers (1), the gas flow pipe network (2) including a gas flow main pipe (21) and a plurality of gas flow branch pipe networks (22), the plurality of gas flow branch pipe networks (22) being sequentially connected to the gas flow main pipe (21) along the gas flow direction of the gas flow main pipe (21), and the gas flow main pipe (21) and each gas flow branch pipe network (22) being provided with air inlet holes (23).

2. The vacuum insulating panel core material according to claim 1, characterized in that, Each gas flow branch pipe network (22) includes a primary gas flow pipeline (221) and a plurality of secondary gas flow pipelines (222), the primary gas flow pipeline (221) being connected to the gas flow main pipe (21), and the plurality of secondary gas flow pipelines (222) being sequentially connected to the primary gas flow pipeline (221) along the gas flow direction of the primary gas flow pipeline (221).

3. The vacuum insulation panel core material according to claim 2, characterized in that Each secondary gas flow pipeline (222) includes a secondary gas flow pipe body (2221) and a plurality of tertiary gas flow pipe bodies (2222), the secondary gas flow pipe body (2221) being connected to the primary gas flow pipeline (221), and the plurality of tertiary gas flow pipe bodies (2222) being sequentially connected to the secondary gas flow pipe body (2221) along the gas flow direction of the secondary gas flow pipe body (2221).

4. The vacuum insulating panel core material according to claim 2, wherein The primary gas flow pipeline (221) is arranged at an acute angle with the gas flow main pipe (21); and / or, The secondary gas flow pipeline (222) is arranged at an acute angle with the primary gas flow pipeline (221).

5. The vacuum insulation panel core material according to claim 2, wherein A first spiral groove extending spirally along the length direction is provided on the inner wall of the gas flow main pipe (21); and / or, A second spiral groove extending spirally along the length direction is provided on the inner wall of the primary gas flow pipeline (221); and / or, A third spiral groove extending spirally along the length direction is provided on the inner wall of the secondary gas flow pipeline (222).

6. The vacuum insulation panel core material according to claim 2, wherein, The diameter of the gas flow main pipe (21) is less than or equal to 1 mm, and the wall thickness is greater than or equal to 50 μm and less than or equal to 100 μm; and / or, The diameter of the primary gas flow pipeline (221) is less than or equal to 1 mm, and the wall thickness is greater than or equal to 50 μm and less than or equal to 100 μm; and / or, The diameter of the secondary gas flow pipeline (222) is less than or equal to 1 mm, and the wall thickness is greater than or equal to 50 μm and less than or equal to 100 μm.

7. The vacuum insulation panel core material according to any one of claims 1 to 6, characterized in that, The aperture of the air inlet hole (23) is greater than or equal to 10 μm and less than or equal to 50 μm; and / or, The density of the intake holes (23) is 200 to 500 holes / cm 2 .

8. The vacuum insulation panel core material according to any one of claims 1 to 6, characterized in that, The material of the gas flow pipe network (2) is an organic polymer material, a metal material or a ceramic material.

9. A vacuum insulation panel, characterized in that, Comprising: A vacuum barrier film bag and a vacuum insulation panel core material according to any one of claims 1 to 8, the vacuum insulation panel core material being vacuum-sealed in the vacuum barrier film bag.

10. The vacuum insulation panel according to claim 9, characterized in that, Further comprising: An exhaust pipe, the exhaust pipe is provided with ventilation holes, the exhaust pipe is located on the side of the vacuum insulation panel core material, and the gas flow direction of the exhaust pipe is the same as the gas flow direction of the main gas flow pipe (21).

11. A method for manufacturing a vacuum insulating panel as claimed in claim 9 or 10, characterized in that, Comprising: Put the vacuum insulation panel core material into the vacuum barrier film bag, wherein the outlet of the main gas flow pipe (21) faces the opening of the vacuum barrier film bag; Vacuum the vacuum barrier film bag and seal the opening to form the vacuum insulation panel.

12. A refrigeration device, characterized in that, Comprising a box body and the vacuum insulation panel according to claim 9 or 10, the vacuum insulation panel is installed in the box body.

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