Flow guide device and application thereof

Abstract

The invention discloses a flow guide device and application thereof.The flow guide device comprises a flow guide cover plate and a flow guide bottom plate, the center of the flow guide cover plate is provided with a confluence air exhaust hole, the center of the flow guide bottom plate is provided with a confluence air guide hole, the flow guide cover plate is provided with a first top face and a first bottom face opposite to the first top face, and the first bottom face is provided with an upper flow guide groove; an upper diversion trench is arranged on the first bottom face of the diversion cover plate, the upper diversion trench and the upper diversion trench are distributed in a staggered mode, the diversion bottom plate is provided with a second top face and a second bottom face opposite to the second top face, a lower diversion trench is formed in the second top face, and the lower diversion trench is connected with the confluence air guide hole. Lower flow guide columns are arranged on the second top face of the flow guide bottom plate, the lower flow guide columns and the lower flow guide grooves are distributed in a staggered mode, the first bottom face of the flow guide cover plate and the second top face of the flow guide bottom plate are oppositely arranged, and the upper flow guide columns and the lower flow guide columns are distributed in a staggered mode. The device is used for dredging and converging gas in the device, so that the vacuum device reaches a higher vacuum degree level.

Description

Technical Field

[0001] The present invention relates to the field of vacuum diversion, and in particular to a diversion device and application thereof. Background Art

[0002] Vacuum insulation panels (VIPs) are highly effective thermal insulation materials consisting of a core material and a barrier layer. The core material is typically made of materials with extremely low thermal conductivity, such as microporous silicates and fumed silica. These materials effectively reduce heat conduction in a high vacuum environment. The barrier layer typically utilizes a multi-layer composite film, which is evacuated to a high vacuum state through a special process, significantly reducing the effects of thermal convection.

[0003] VIP is characterized by its exceptional thermal insulation properties, with a thermal conductivity typically only a fraction of that of traditional insulation materials such as expanded polystyrene (EPS) and mineral wool. This means that to achieve the same insulation effect, the required thickness of VIP is much smaller than that of traditional insulation materials, making it particularly suitable for applications with limited space, such as refrigerators, refrigerated trucks, and building exterior wall insulation.

[0004] VIP's vacuum environment significantly reduces the presence of gas molecules, effectively reducing heat transfer through gas molecule collisions. The vacuum is the foundation for VIP's highly efficient thermal insulation performance, improving the material's insulation capacity by reducing heat conduction and convection, while protecting the core insulation material from the effects of the external environment.

[0005] In the prior art, a hole on a surface of a vacuum device is generally evacuated. The air or other gas inside the device is collected at the hole through the internal gap channels under the action of the pressure difference and is extracted, thereby forming a vacuum chamber with a certain vacuum degree inside the device. The degree of vacuum is limited by the ability of the extraction hole to collect gas and the smoothness of the gas flow inside the device. In order to avoid deformation of the barrier layer between the chamber of the vacuum device and the atmospheric environment (i.e., the outer shell of the vacuum device), the inside of the device is generally filled with core material, and the barrier layer of the device is generally made of soft or soft and hard composite materials.

[0006] When the device is evacuated, the local negative pressure in the core material or outer packaging near the evacuation hole causes the various materials to be compressed and tightly adhered to each other, blocking the continuous outflow of gas from the device. As a result, the entire device cannot be evacuated or the vacuum level cannot reach the expected level. Similarly, vacuum insulation panels also have this problem.

[0007] Therefore, the inventor conducted further research on this issue and developed a diversion device and its application, which resulted in the present case. Summary of the Invention

[0008] The purpose of the present invention is to provide a flow guiding device and its application. The flow guiding device is mainly used to dredge and converge the gas in the device, so that the vacuum device can reach a higher vacuum level.

[0009] In order to solve the above technical problems, the technical solution of the present invention is:

[0010] A flow guide device includes a flow guide cover and a flow guide bottom plate. The center of the flow guide cover is provided with a flow collection and extraction hole, and the center of the flow guide bottom plate is provided with a flow collection and air guide hole.

[0011] The guide cover plate has a first top surface and a first bottom surface opposite to the first top surface. The first bottom surface is provided with a plurality of upper guide grooves, which are connected to the converging air extraction holes. The first bottom surface of the guide cover plate is provided with a plurality of upper guide columns, which are staggered with the upper guide grooves.

[0012] The guide bottom plate has a second top surface and a second bottom surface opposite to the second top surface. A plurality of lower guide grooves are provided on the second top surface. The lower guide grooves are connected to the converging air guide holes. A plurality of lower guide columns are provided on the second top surface of the guide bottom plate. The lower guide columns and the lower guide grooves are staggered.

[0013] The first bottom surface of the guide cover plate is arranged opposite to the second top surface of the guide bottom plate, and the upper guide columns and the lower guide columns are staggered.

[0014] Furthermore, the upper guide columns are distributed in two circles with the converging air extraction hole as the center, namely the inner circle upper column and the outer circle upper column. The lower guide columns are distributed in a circle with the converging air guide hole as the center. The lower guide columns are located in the ring formed by the inner circle upper column and the outer circle upper column.

[0015] Furthermore, a plurality of upper guide grooves are provided on the first top surface, and the converging air extraction holes are composed of multiple groups of holes. Along the diameter direction, from the inside to the outside, three circles of holes are provided that pass through the top and bottom, namely the inner circle upper holes, the middle circle upper holes and the outer circle upper holes. One side edge of the outer circle upper holes is connected to an upper guide groove of the first top surface, and the other side edge of the outer circle upper holes is connected to an upper guide groove of the first bottom surface.

[0016] Furthermore, a plurality of lower guide grooves are provided on the second bottom surface, and the converging air guide holes are composed of multiple groups of holes. Along the diameter direction, from the inside to the outside, three circles of holes are provided that pass through the top and bottom, namely the inner circle lower holes, the middle circle lower holes and the outer circle lower holes. One side edge of the outer circle lower holes is connected to a lower guide groove of the second top surface, and the other side edge of the outer circle lower holes is connected to a lower guide groove of the second bottom surface.

[0017] Furthermore, it also includes a plurality of upper guide grooves and a plurality of lower guide grooves, each upper guide groove is connected to at least one upper guide groove, and each lower guide groove is connected to at least one lower guide groove.

[0018] Furthermore, the upper branch diversion trough adopts a Y-shaped joint for confluence, and the lower branch diversion trough adopts a Y-shaped joint for confluence.

[0019] Furthermore, the cross-sectional area of each upper guide groove is equal to the sum of the cross-sectional areas of the upper guide branch grooves merging with it, and the cross-sectional area of each lower guide groove is equal to the sum of the cross-sectional areas of the lower guide branch grooves merging with it.

[0020] Furthermore, a plurality of upper guide grooves are provided on the first top surface of the guide cover plate, and the upper guide grooves on the first top surface are connected to the converging air extraction holes, or a plurality of lower guide grooves are provided on the second bottom surface of the guide bottom plate, and the lower guide grooves on the second bottom surface are connected to the converging air guide holes.

[0021] Furthermore, a plurality of first through holes extending to the first top surface are provided at the intersection of the guide groove and the upper guide branch groove on the first bottom surface of the guide cover plate, and a plurality of second through holes extending to the second bottom surface are provided at the intersection of the lower guide groove and the lower guide branch groove on the second top surface of the guide bottom plate.

[0022] The present invention also provides a vacuum insulation panel, comprising: a core material, a guide device and a covering material, wherein the covering material wraps the core material and forms a vacuum between the covering material and the core material; the guide device is installed on the core material, and the guide device is the above-mentioned guide device.

[0023] With this solution, the pre-embedded flow guide device at the opening allows residual gas from all directions within the device to converge at the opening through the device's flow guide grooves and guide posts, shortening the gas flow path and preventing localized gas accumulation that would otherwise reduce the overall vacuum level. Furthermore, compared to existing methods, the present invention achieves the same vacuum level in a shorter time, resulting in a higher vacuum level and a smoother sealing surface for the exhaust port. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 This is the explosion diagram of the present invention Figure 1 ;

[0026] Figure 3 This is the explosion diagram of the present invention Figure 2 ;

[0027] Figure 4 It is a cross-sectional schematic diagram of the structure of the present invention;

[0028] Figure 5 Schematic diagram of the first top surface of the guide cover plate of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the vacuum insulation panel of the present invention when viewed from above;

[0030] Figure 7 yes Figure 6 AA direction cross-sectional diagram;

[0031] Figure 8 yes Figure 7 A partial enlarged view of point B in the middle;

[0032] Figure 9 This is a schematic diagram of the explosion of the vacuum insulation panel of the present invention Figure 1 ;

[0033] Figure 10 This is a schematic diagram of the explosion of the vacuum insulation panel of the present invention Figure 2 ;

[0034] Figure 11 is a schematic diagram of another embodiment of the present invention;

[0035] Figure 12 is a schematic diagram of the structure of another embodiment of the present invention when viewed from above;

[0036] Figure 13 It is a schematic diagram of the second top surface of the guide bottom plate according to another embodiment of the present invention.

[0037] Label Description

[0038] Guide cover 1 Converging air extraction hole 11 Inner ring upper hole 111 Middle ring upper hole 112

[0039] Hole 113 on outer ring First top surface 12 First bottom surface 13

[0040] Upper guide groove 14 Upper guide column 15 Inner circle upper column 151

[0041] Outer ring upper column 152 Upper guide groove 16 First through hole 17

[0042] Guide plate 2 Converging air guide hole 21 Inner circle lower hole 211 Middle circle lower hole 212

[0043] Outer ring lower hole 213 Second top surface 22 Second bottom surface 23

[0044] Lower guide groove 24 Lower guide column 25 Lower guide branch groove 26 Second through hole 27

[0045] Core material 3 First groove 31 Second groove 32 DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] The present invention discloses a flow guiding device, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, it is a preferred embodiment of the present invention, comprising a guide cover plate 1 and a guide bottom plate 2 . The guide cover plate 1 has a converging air extraction hole 11 at its center, and the guide bottom plate 2 has a converging air guide hole 21 at its center.

[0048] like Figure 2 As shown, the guide cover plate 1 has a first top surface 12 and a first bottom surface 13. The first top surface 12 is arranged opposite to the first bottom surface 13. A plurality of upper guide grooves 14 are provided on the first bottom surface 13. The upper guide grooves 14 are connected to the converging air extraction holes 11. A plurality of upper guide columns 15 are provided on the first bottom surface 13 of the guide cover plate 1. The upper guide columns 15 are staggered with the upper guide grooves 14.

[0049] The guide cover 1 is installed below the vacuum device's exhaust hole and is attached parallel to the inner wall of the exhaust hole. When exhausting, the gas in the horizontal 360° direction and the center of the longitudinal guide bottom plate 2 can be converged to the exhaust hole and discharged.

[0050] like Figure 3 As shown, the guide base plate 2 has a second top surface 22 and a second bottom surface 23, which are arranged opposite each other. A plurality of lower guide grooves 24 are provided on the second top surface 22. The guide base plate 2 directs gas from the bottom of the vacuum device in a 360° horizontal direction to the center of the base plate, and then longitudinally to the center of the guide cover plate 1, where it is discharged through the exhaust holes. The lower guide grooves 24 are connected to the converging air guide holes 21. A plurality of lower guide posts 25 are provided on the second top surface 22 of the guide base plate 1, and the lower guide posts 25 are staggered with the lower guide grooves 24.

[0051] like Figure 4 As shown, the first bottom surface 13 of the guide cover 1 is arranged opposite the second top surface 22 of the guide bottom plate 2, and the upper guide posts 15 and the lower guide posts 25 are staggered. When applied to a vacuum device, the lengths of the upper guide posts 15 and the lower guide posts 25 can be adjusted according to the thickness of the vacuum device.

[0052] Furthermore, a plurality of upper guide grooves 14 are provided on the first top surface 12 of the guide cover plate 1 , or a plurality of lower guide grooves 24 are provided on the second bottom surface 23 of the guide bottom plate 2 .

[0053] Alternatively, in other embodiments of the present invention, upper guide grooves 14 are provided on both the first top surface 12 and the first bottom surface 13 . Alternatively, lower guide grooves 24 are provided on both the second top surface 22 and the second bottom surface 23 .

[0054] like Figure 4As shown, the upper guide pillars 15 are arranged in two circles around the converging air extraction hole 11, comprising an inner circle of upper pillars 151 and an outer circle of upper pillars 152. The lower guide pillars 25 are arranged in a circle around the converging air guide hole 21, located between the inner and outer circle of upper pillars 151, 152. That is, the lower guide pillars 25 are located within the annulus formed by the inner and outer circle of upper pillars 151, 152. In this embodiment, there are six pillars per circle to prevent interference when the vacuum device is thin, while also ensuring that the guide pillars are spaced apart and maintain a small air guide stroke.

[0055] Furthermore, when viewed from above, the guide cover plate 1 and the guide bottom plate 2 are circular in shape. The circular structure is more uniform when subjected to force and is less likely to deform.

[0056] Furthermore, a plurality of upper guide grooves 14 are provided on both the first top surface 12 and the first bottom surface 13. The converging exhaust hole 11 is composed of multiple groups of holes and communicates with the exhaust hole of the vacuum device. Three circles of holes are arranged along the diameter, from inside to outside, forming a mesh structure. These are the inner circle of upper holes 111, the middle circle of upper holes 112, and the outer circle of upper holes 113. The edge of each outer circle of upper holes 113 is connected to an upper guide groove 14 on the first top surface 12 on one side, and to an upper guide groove 14 on the first bottom surface 13 on the other side. In this embodiment, the inner circle of upper holes 111 is a circular hole, the middle circle of upper holes 112 has six holes, and the outer circle of upper holes 113 has six holes. These holes are primarily used to converge gas flowing into the longitudinal guide bottom plate. Furthermore, the mesh structure prevents clogging of the vacuum device's exhaust hole due to deformation and compression of the core material during extraction.

[0057] Furthermore, multiple lower guide grooves 24 are provided on the second top surface 22 and the second bottom surface 23. The converging air guide holes 21 are composed of multiple groups of holes. Along the diameter direction, from the inside to the outside, three circles of holes are arranged vertically through: an inner circle of lower holes 211, a middle circle of lower holes 212, and an outer circle of lower holes 213. One edge of each outer circle of lower holes 213 is connected to a lower guide groove 24 on the second top surface 22, and the other edge is connected to a lower guide groove 24 on the second bottom surface 23. The converging air guide holes 21 are primarily used to collect residual gas from the bottom surface of the vacuum device, converging it at the center and guiding it longitudinally to the converging air extraction hole 11, thereby shortening the gas flow path.

[0058] In another embodiment, the converging air evacuation holes 11 are composed of multiple groups of holes, which communicate with the vacuum device's evacuation holes. Three circles of vertically continuous holes are arranged along the diameter, from inside to outside, forming a mesh structure. These are inner circle upper holes 111, middle circle upper holes 112, and outer circle upper holes 113. Each outer circle upper hole 113 is connected to an upper guide groove 14 on the first bottom surface 13. The converging air evacuation holes 21 are composed of multiple groups of holes. Three circles of vertically continuous holes are arranged along the diameter, from inside to outside, namely inner circle lower holes 211, middle circle lower holes 212, and outer circle lower holes 213. Each outer circle lower hole 213 is connected to a lower guide groove 24 on the second bottom surface 23. First, the flow rate and pressure differential are greatest when evacuating at the converging position. The mesh structure of the converging air evacuation holes 11 prevents the completely hollow core material from being drawn out and blocking the evacuation port, and also prevents excessive brackets from affecting airflow. In this embodiment, the converging exhaust holes 11 are made into three circles, which is a manifestation of a mesh structure. The holes 113 on the outer circle are connected to the upper guide groove 14 to facilitate the discharge of the gas flowing through the upper guide groove 14. The holes 111 on the inner circle facilitate the discharge of gas in the middle and bottom of the core material. The holes 112 on the middle circle serve as a transition and buffer between the above two passages.

[0059] Furthermore, it includes a plurality of upper guide grooves 16 and a plurality of lower guide grooves 26 . The upper guide groove 14 is connected to at least one upper guide groove 16 , and the lower guide groove 24 is connected to at least one lower guide groove 26 .

[0060] The cross-sectional area of each upper guide groove 14 is equal to the sum of the cross-sectional areas of the upper guide branch groove 16 with which it flows, and the cross-sectional area of each lower guide groove 24 is equal to the sum of the cross-sectional areas of the lower guide branch groove 26 with which it flows. Figure 5 As shown, taking the first top surface of the guide cover plate 1 as an example, the upper guide branch grooves 16 are connected to the outer edge of the guide cover plate 1, and their cross-sectional areas are S1 and S2 respectively. After the two upper guide branch grooves 16 (S1 and S2) merge, a new upper guide branch groove 16 is formed, and its cross-sectional area S3 is the sum of the previous two branch grooves (i.e., S3 = S1 + S2). After merging with the third upper guide branch groove 16 (whose cross-sectional area is S4), an upper guide groove 24 is formed. The cross-sectional area of the upper guide groove 24 is S5, which is the sum of the previous three branch grooves (i.e., S5 = S3 + S4 = S1 + S2 + S4).

[0061] In this embodiment, one of the functions of the upper guide groove 14 is to collect the airflow of the upper guide branch groove 16 and transport it to the converging exhaust hole 11. The first top surface 12 and the first bottom surface 13 of the guide cover 1 each have 6 upper guide grooves 14. One end of each upper guide groove 14 is connected to the converging exhaust hole 11, and the other end is connected to 3 upper guide branch grooves 14 respectively. The cross-sectional area of the upper guide groove 14 is the same as the sum of the cross-sectional areas of the upper guide branch grooves 16 of the converging flow. The sum of the cross-sectional areas of the upper guide branch grooves 16 is equal to the cross-sectional area of the upper guide grooves 14, which can ensure that the linear velocity does not change or changes slightly when the airflow is transmitted between the upper guide branch grooves 16 and the upper guide grooves 14, which is more conducive to diversion. Similarly, the lower guide groove 24 also has the same function, which will not be described in detail here.

[0062] Furthermore, the two upper branch flow guide grooves 16 are connected by a Y-shaped joint, and the two lower branch flow guide grooves 26 are connected by a Y-shaped joint.

[0063] In this embodiment, the first top surface 12 and the first bottom surface 13 of the guide cover 1 each have 18 upper guide grooves 16. One end of each upper guide groove 16 is connected to the guide groove 14, and the other end is in contact with the internal space and material of the vacuum device. The upper guide grooves 16 use Y-shaped joints for confluence, and the intersection angle range is 30°-45°. Figure 5 As shown, for example, two upper guide branch grooves 16 are connected along the outer edge of the guide cover 1. When the gas flows converge, the intersection angle formed is θ1, θ1 = 45°. After the gas flows converge, the intersection angle formed when the gas flows converge again with the third upper guide support 16 is θ2, θ2 = 30°. When converging, the Y-shaped confluence fork needs to consider the combined effects of mutual interference when multiple gas streams converge and the resistance of the pipe wall. According to the conventions of fluid mechanics, when the intersection angle is 30-45°, the comprehensive kinetic energy loss (gas resistance) is low. When pumping gas, the upper guide branch grooves 16 form a negative pressure, causing the gas in all directions inside the device to flow along the branch groove channel to the upper guide groove 14. A sufficient number of upper guide branch grooves 16 and a cross-distribution of the front and back surfaces can reduce channel blockage and cause poor pumping when the gas flows converge. Similarly, the lower guide branch grooves 26 use a Y-shaped joint for converging, with an intersection angle of 30°-45°, which also has the same effect.

[0064] Furthermore, one end of the upper guide post 15 is fixed to the first bottom surface 13 of the guide cover 1. One end is conical, and the length can be adjusted according to the thickness of the vacuum device. The purpose of the conical shape is to facilitate the penetration of the guide cover 1 and the guide bottom plate 2 into the core material, thereby reducing the pressure on the core material, which may cause poor contact between the core material and the upper guide post 15 and lower guide post 25, and compress the airflow channel, resulting in fluid flow problems.

[0065] With the converging air extraction hole 11 as the center, the guide posts 15 are arranged in two circles, each with six, staggered with the upper guide grooves 14. The upper guide posts 15 can be inserted into the filling core material of the vacuum device. They not only secure the guide cover 1, but also form capillary channels between the upper guide posts 15 and the core material, allowing smooth airflow between the guide cover 1 and the guide base 2. The lower guide posts 25, with their conical ends, also serve the same purpose: they secure the guide base 2, while also forming capillary channels between the lower guide posts 25 and the core material, allowing smooth airflow between the guide cover 1 and the guide base 2.

[0066] Since the first bottom surface 13 of the guide cover 1 is arranged opposite to the second top surface 22 of the guide bottom plate 2, the upper guide column 15 and the lower guide column 25 are staggered. Under normal circumstances, the conical design of the upper guide column 15 and the lower guide column 25 can shorten the distance between the first bottom surface 13 and the second top surface 22, making it more convenient for the airflow to connect.

[0067] Furthermore, the area of deflector cover 1 is larger than that of deflector base 2. Since deflector base 2 is not an exhaust port but only serves as an auxiliary function, theoretically, deflector cover 1 and deflector base 2 should be sufficiently large. However, to ensure the smoothness of all surfaces, deflector cover 1 and deflector base 2 should be sufficiently small. The areas of deflector cover 1 and deflector base 2 are appropriately adjusted based on their importance. Clearly, deflector cover 1 is closer to the exhaust port and serves a greater purpose than deflector base 2. Therefore, the area of deflector cover 1 is larger than that of deflector base 2.

[0068] Preferably, the diameter of the guide bottom plate 2 is one third to one half of the diameter of the guide cover plate 1. It can be adjusted according to the size of the vacuum device.

[0069] In one embodiment of the present invention, a plurality of upper guide grooves 14 are provided on the first top surface 12 of the guide cover plate 1 , or a plurality of lower guide grooves 24 are provided on the second bottom surface 23 of the guide bottom plate 2 .

[0070] This structure is suitable for when the covering material of the vacuum device is a rigid material, and avoids the influence of the soft material on the upper guide groove 14 or the lower guide groove 24.

[0071] like Figure 11 、 Figure 12 and Figure 13 As shown, in another embodiment of the present invention, an upper guide groove 14 is provided on the first bottom surface 13 of the guide cover 1. When there is no upper guide groove 14 on the first top surface 12, a plurality of first through holes 17 are provided on the first bottom surface 13 of the guide cover 1. The first through holes 17 are located at the intersection of the upper guide groove 14 and the upper guide branch groove 16, and the first through holes 17 pass through the first top surface 11.

[0072] A lower guide groove 24 is provided on the second top surface 22 of the guide bottom plate 2. When there is no lower guide groove 24 on the second bottom surface 23, a plurality of second through holes 27 are provided on the second top surface 22 of the guide bottom plate 2. The second through holes 27 are located at the intersection of the lower guide groove 24 and the lower guide branch groove 26. The second through holes 27 penetrate to the second bottom surface 23.

[0073] This structure is suitable for when the covering material of the vacuum device is a soft material, and can prevent the soft material from being deformed after vacuuming.

[0074] like Figure 6 、 Figure 7 and Figure 8 As shown, a vacuum insulation panel includes: a core material 3, a flow guide device and a covering material (the covering material is not drawn in the figure for better illustration), the covering material wraps the core material 3 and forms a vacuum between the covering material and the core material 3, and the flow guide device is installed on the core material 3. Specifically, Figure 9 and Figure 10 As shown, the core material 3 has an upper surface and a lower surface opposite to the upper surface. A first groove 31 is provided on the upper surface of the core material 3, and the guide cover 1 is installed in the first groove 31. A second groove 31 is provided on the lower surface of the core material 3, and the guide bottom plate 2 is installed in the second groove 32, so that the first bottom surface 13 of the guide cover 1 is opposite to the second top surface 22 of the guide bottom plate 2, and the upper guide column 15 and the lower guide column 25 are staggered. For example, Figure 8 As shown, the lower guide column 25 is located between the inner circle upper column 151 and the outer circle upper column 152, and the three are on the same diameter, forming a forked distribution.

[0075] The present invention also provides a box body that utilizes the aforementioned vacuum insulation panel. Specifically, it comprises a core material (or supporting structure), a flow guide device, and a cladding material. The cladding material wraps around the core material (or supporting structure) and can be shaped to suit the product, creating a vacuum between the cladding material and the core material (or supporting structure). The flow guide device is mounted on the core material (or supporting structure), and the flow guide device is the aforementioned flow guide device. The core material, flow guide device, and cladding material are located within the box body, which is made of one or more of metal and non-metal materials.

[0076] The present invention also provides a refrigerator that uses one or more of the above-mentioned vacuum insulation panels and vacuum insulation boxes. Specifically, the vacuum insulation panels and (or) the vacuum insulation boxes constitute the refrigerator body and door, and the refrigerator is assembled.

[0077] Furthermore, the centers of the converging air extraction holes 11 and the converging air guide holes 21 are on the same straight line. During the air extraction process, the shorter the gas flow distance, the smaller the air resistance. The airflow from the converging air extraction holes 11 and the converging air guide holes 21 are ultimately directed to the air extraction port, and their centers are aligned, which results in the shortest distance and the highest air extraction efficiency.

[0078] Furthermore, when viewed from above, the shape of the guide cover plate 1 and the guide bottom plate 2 is one of circular, square, elliptical, and triangular.

[0079] When using the present invention, pre-install the guide cover 1 on the upper surface of the core material 3 of the vacuum device, and place the guide base 1 on the lower surface of the core material, keeping the two aligned. The first top surface 22 of the guide cover 1 is tightly fitted against the inner wall of the vacuum device's outer shell, the first bottom surface 23 of the guide cover 1 is tightly fitted against the outer surface of the core material 3, the second top surface 22 of the guide base 2 is tightly fitted against the outer surface of the core material 3, and the second bottom surface 24 of the guide base 2 is tightly fitted against the inner wall of the vacuum device's outer shell in the other direction. Ensure that the exhaust hole is aligned with the converging exhaust hole 11 of the guide cover 1 and that the two are connected. The gas between the inner wall of the vacuum device and the core material 3 can flow to the converging exhaust hole 11 through the upper guide groove 16, lower guide groove 26, upper guide groove 14, and lower guide groove 24 of the guide cover plate 1 and the guide base plate 2. The gas inside the core material 3 then flows through the upper guide groove 16, lower guide groove 26, upper guide groove 14, lower guide groove 24, upper guide column 15, and lower guide column 25 to the converging exhaust hole, and is ultimately evacuated from the vacuum device. After the exhaust is completed, the exhaust hole is sealed to maintain the surface of the vacuum device flat while achieving the desired vacuum level.

[0080] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any changes or modifications made according to the claims and description of the present invention should fall within the scope of the patent of the present invention.

Claims

1. A flow guide device, characterized in that: The condenser is provided with a plurality of guide columns and a plurality of guide grooves, and the guide columns are staggered with the upper guide grooves. The condenser is provided with a plurality of guide columns and a plurality of guide grooves. The condenser is provided with a plurality of guide columns and a plurality of guide grooves. The condenser is provided with a plurality of guide columns and a plurality of guide grooves. The condenser is provided with a plurality of guide columns and a plurality of guide grooves. The condenser is provided with a plurality of guide columns and a plurality of guide grooves. The condenser is provided with a plurality of guide columns and a plurality of guide grooves. The condenser is provided with a plurality of guide columns and a plurality of guide grooves. The condenser is provided with a plurality of guide columns and a plurality of guide grooves. The condenser is provided with a plurality of guide columns and a plurality of guide grooves. The condenser is provided with a plurality of guide columns and a plurality of guide grooves. The condenser is provided with a plurality of guide columns and a plurality of guide grooves. The condenser is provided with a plurality of guide columns and a plurality of guide grooves. The condenser is provided with a plurality of guide columns and a plurality of guide grooves. The condenser is provided with a plurality of guide columns and a plurality of guide grooves. The condenser is provided with a plurality of guide columns and a plurality of guide grooves.

2. The flow guide device according to claim 1, characterized in that: The upper guide column is distributed in two circles with the converging air extraction hole as the center, namely the inner circle upper column and the outer circle upper column. The lower guide column is distributed in a circle with the converging air guide hole as the center. The lower guide column is located in the ring formed by the inner circle upper column and the outer circle upper column.

3. The flow guide device according to claim 1, characterized in that: A plurality of upper guide grooves are provided on the first top surface, and the converging air extraction holes are composed of multiple groups of holes. Along the diameter direction, from the inside to the outside, three circles of holes are provided that pass through the top and bottom, namely the inner circle upper holes, the middle circle upper holes and the outer circle upper holes. One side edge of the outer circle upper holes is connected to an upper guide groove of the first top surface, and the other side edge of the outer circle upper holes is connected to an upper guide groove of the first bottom surface.

4. The flow guiding device according to claim 1, characterized in that: A plurality of lower guide grooves are provided on the second bottom surface, and the converging air guide holes are composed of multiple groups of holes. Along the diameter direction, from the inside to the outside, three circles of holes are provided that pass through the top and bottom, namely the inner circle lower holes, the middle circle lower holes and the outer circle lower holes. One side edge of the outer circle lower holes is connected to a lower guide groove of the second top surface, and the other side edge of the outer circle lower holes is connected to a lower guide groove of the second bottom surface.

5. The flow guiding device according to claim 1, characterized in that: It also includes a plurality of upper guide grooves and a plurality of lower guide grooves, each upper guide groove is connected to at least one upper guide groove, and each lower guide groove is connected to at least one lower guide groove.

6. The flow guiding device according to claim 5, characterized in that: The upper diversion branch trough adopts Y-type joint for confluence, and the lower diversion branch trough adopts Y-type joint for confluence.

7. The flow guiding device according to claim 5, characterized in that: The cross-sectional area of each upper guide groove is equal to the sum of the cross-sectional areas of the upper guide branch grooves merging with it, and the cross-sectional area of each lower guide groove is equal to the sum of the cross-sectional areas of the lower guide branch grooves merging with it.

8. The flow guiding device according to claim 1, characterized in that: A plurality of upper guide grooves are provided on the first top surface of the guide cover plate, and the upper guide grooves of the first top surface are connected to the converging air extraction holes, or a plurality of lower guide grooves are provided on the second bottom surface of the guide bottom plate, and the lower guide grooves of the second bottom surface are connected to the converging air guide holes.

9. The flow guiding device according to claim 5, characterized in that: A plurality of first through holes extending to the first top surface are set at the intersection of the guide groove and the upper guide branch groove on the first bottom surface of the guide cover plate, and a plurality of second through holes extending to the second bottom surface are set at the intersection of the lower guide groove and the lower guide branch groove on the second top surface of the guide bottom plate.

10. A vacuum insulation panel, characterized in that: The invention comprises a core material, a flow guiding device and a covering material, wherein the covering material wraps the core material and forms a vacuum between the covering material and the core material; the flow guiding device is installed on the core material, and the flow guiding device is the flow guiding device according to any one of claims 1 to 9.

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