Laminar flow plate and laminar flow plate assembly

Abstract

The utility model discloses a laminar flow plate and a laminar flow plate assembly, and the laminar flow plate comprises a first surface and a second surface which are opposite to each other, a plurality of air suction ports and a plurality of first connecting holes; the first surface faces a surface to be dried; the air suction port is formed above the to-be-dried surface and used for sucking steam generated by the to-be-dried surface, the air suction port is formed in the direction from the first surface to the second surface in a concave mode, and the hole diameter of the air suction port is gradually reduced in the concave direction of the air suction port; the plurality of air suction ports are uniformly distributed in the first surface; one end of each first connecting hole is communicated with the air suction port, and the other end of each first connecting hole is communicated with the outside. The laminar flow plate and the laminar flow plate assembly are used for reducing transverse flow of steam on the surface to be dried and balancing the evaporation rate of each part of the surface to be dried.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum drying devices, in particular to a laminar flow plate and a laminar flow plate assembly. Background Art

[0002] A vacuum drying device is a device that reduces pressure to evaporate the solvent in the surface to be dried and then dries to form a film. For example, existing perovskite films generally form a perovskite liquid film by coating a perovskite slurry on a substrate, and the perovskite liquid film on the substrate will be sent to a vacuum drying device as the surface to be dried for drying. When the perovskite liquid film is vacuum dried, the substrate carrying the perovskite liquid film will first be placed in the vacuum chamber of the vacuum drying equipment, and then the vacuum chamber will be evacuated by a vacuum pump. As the pressure in the vacuum chamber decreases, the solvent in the perovskite liquid film gradually evaporates and reaches a saturated state or a supersaturated state, and then nucleation and crystallization begin in the perovskite liquid film.

[0003] A major factor affecting the quality of nucleation and crystallization of perovskite liquid film is whether the evaporation rate at various parts of the perovskite liquid film is balanced. The existing method of vacuum drying perovskite liquid film is to set an exhaust hole on the side of the substrate away from the perovskite liquid film for vacuuming, and the vapor evaporated from the surface of the perovskite liquid film flows horizontally to the edge of the substrate and the perovskite liquid film before being extracted by the exhaust port. Since the vapor in the middle part of the perovskite liquid film needs to flow horizontally to the edge of the perovskite liquid film before it can be extracted, the lateral flow of the vapor in the middle part of the perovskite liquid film will cause the partial pressure at the edge of the perovskite liquid film to increase, while the partial pressure in the middle part of the perovskite liquid film will decrease. The difference in partial pressure at various parts of the perovskite liquid film will cause the evaporation rate at various parts of the perovskite liquid film to differ, which in turn causes the evaporation rate in the middle part of the perovskite liquid film to be lower than the evaporation rate at the edge of the perovskite liquid film, affecting the drying quality of the perovskite liquid film. Utility Model Content

[0004] The utility model aims to provide a laminar flow plate and a laminar flow plate assembly, which are used to reduce the lateral flow of steam on a surface to be dried and balance the evaporation rate at various locations on the surface to be dried.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] A laminar flow plate, comprising:

[0007] A first surface and a second surface opposite to each other, wherein the first surface faces the surface to be dried;

[0008] A plurality of air inlets, the air inlets being arranged above the surface to be dried and used to absorb steam generated by the surface to be dried, the air inlets being formed concavely from the first surface in a direction toward the second surface, and the aperture of the air inlets being gradually reduced along the concave direction of the air inlets; the plurality of air inlets being evenly distributed on the first surface;

[0009] A plurality of first connection holes, one end of each of the first connection holes is connected to the air inlet, and the other end of the first connection hole is connected to the outside.

[0010] Preferably, the aperture of the air intake port used to connect to one end of the first connecting hole is the same as the aperture of the first connecting hole; the axial direction of the air intake port coincides with the axial direction of the first connecting hole; wherein the axial direction of the air intake port is parallel to the thickness direction of the laminar plate.

[0011] Preferably, the aperture of the air intake port adjacent to one end of the first surface is 1-300 mm; the air intake port forms a hollow truncated cone structure, and the angle formed by the side surface of the truncated cone structure formed by the air intake port and the first connecting hole is 70-150°.

[0012] Preferably, the first surface is a rectangular surface, a plurality of the air inlets are distributed on the first surface in a rectangular array, and a spacing between adjacent air inlets in the same row is the same as a spacing between adjacent air inlets in the same column.

[0013] Preferably, it also includes at least one confluence cavity, which is formed by a recess from the second surface and is connected to a plurality of the first connecting holes; the plurality of first connecting holes connected to the same confluence cavity are distributed in a circular array; the central part of the confluence cavity is located at the center of the circular array of the plurality of first connecting holes connected to the confluence cavity.

[0014] Preferably, the confluence cavity includes a first branch portion and a first confluence portion located in the central part of the confluence cavity; a plurality of first branch portions are provided, and the plurality of first branch portions are distributed in a ring array around the first confluence portion, one end of the first branch portion is connected to the first confluence portion, and the other end of the first branch portion is connected to the first connecting hole.

[0015] Preferably, each of the confluence chambers is provided with four first branch portions, each of the first branch portions is communicated with one of the first connection holes, and the four first connection holes communicated with the same confluence chamber are distributed in the form of a square at the four corners.

[0016] Preferably, the laminar plate is a rectangular plate structure, and the confluence cavity is formed by being recessed from the second surface;

[0017] Alternatively, the laminar plate includes a truncated cone portion and a raised portion connected to the truncated cone portion, the truncated cone portion is hollow inside to form the air inlet, and the raised portion is hollow inside to form a confluence cavity and a plurality of first connecting holes connected to the confluence cavity.

[0018] A laminar flow plate assembly, comprising:

[0019] Any of the above laminar flow plates is provided with a confluence cavity connected to the plurality of first connection holes;

[0020] An averaging plate comprises a plurality of second connecting holes and an averaging cavity connected to the plurality of second connecting holes, wherein the second connecting holes are connected to a converging cavity of the laminar flow plate, and the plurality of second connecting holes connected to the same averaging cavity are distributed in a circular array, and a central portion of the averaging cavity is located at the center of the circular array of the plurality of second connecting holes connected to the averaging cavity.

[0021] Preferably, the dividing chamber includes a plurality of second branches and a second confluence located in the central part of the dividing chamber, the plurality of second branches are distributed in a circular array around the second confluence, one end of the second branch is connected to the second confluence, and the other end of the second branch is connected to the second connecting hole.

[0022] Preferably, each of the equally dividing chambers is provided with four second branch portions, each of the second branch portions is connected to one of the second connecting holes, and the four second connecting holes connected to the same equally dividing chamber are distributed at the four corners of a square.

[0023] Preferably, the distributing cavity is formed by being concave from the surface of the distributing plate facing away from the laminar flow plate, or the distributing plate is hollow inside to form the distributing cavity.

[0024] Compared with the prior art, the beneficial effects of the present invention include at least:

[0025] By arranging an air intake port located above the surface to be dried on the laminar flow plate to absorb the steam generated by the surface to be dried, the steam generated on the surface to be dried can flow upward to be absorbed by the air intake port, thereby reducing the influence of the lateral flow of the steam generated on the surface to be dried on the evaporation rate of various parts of the surface to be dried, and improving the uniformity of the evaporation rate of various parts of the surface to be dried; and, by arranging the aperture of the air intake port to gradually decrease along its concave direction, the steam absorbed by the air intake port can be guided, thereby reducing the lateral flow of the steam and improving the uniformity of the evaporation rate of various parts of the surface to be dried. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a laminar flow plate assembly according to an embodiment of the utility model;

[0027] Figure 2It is an exploded view of a laminar flow plate assembly according to an embodiment of the utility model;

[0028] Figure 3 This is a schematic structural diagram of a laminar flow plate according to an embodiment of the utility model;

[0029] Figure 4 This is a structural schematic diagram of a laminar flow plate of an embodiment of the utility model from another perspective;

[0030] Figure 5 yes Figure 4 Cross-sectional view of section EE;

[0031] Figure 6 This is a schematic diagram of the local structure of a laminar flow plate in one embodiment of the utility model;

[0032] Figure 7 This is a schematic structural diagram of an equal distribution plate according to an embodiment of the utility model;

[0033] Figure 8 It is a structural schematic diagram of a laminar flow plate assembly of another embodiment of the utility model;

[0034] Fig. 9 is a partial cross-sectional view of a laminar flow plate of another embodiment of the utility model;

[0035] Fig.10 It is a partial cross-sectional view of a laminar plate assembly according to another embodiment of the utility model.

[0036] In the figure: 1, laminar plate; 11, first surface; 12, second surface; 13, first connecting hole; ɑ, angle; 14, confluence chamber; 141, first branch portion; 142, first confluence portion; 15, air inlet; 16, frustum portion; 17, raised portion; 2, equalizing plate; 21, equalizing chamber; 211, second confluence portion; 212, second branch portion; 22, second connecting hole; 100, surface to be dried. DETAILED DESCRIPTION

[0037] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0038] The words expressing positions and directions described in the present utility model are all explained by taking the drawings as examples, but they can be changed as needed, and all the changes are included in the protection scope of the present utility model.

[0039] like Figure 2As shown, the utility model provides a laminar flow plate 1, which can be placed above the surface to be dried 100 and spaced apart from the surface to be dried 100. The laminar flow plate 1 can be directly or indirectly connected to a vacuum generating device, so that the vacuum generating device can evacuate the space where the surface to be dried 100 is located through the laminar flow plate 1, and the vapor evaporated from the surface to be dried 100 can also be first sucked into the inside of the laminar flow plate 1 by the laminar flow plate 1, and then flow to the vacuum generating device. Among them, the vacuum generating device can be a vacuum pump, the surface to be dried 100 is a surface to be dried, such as the surface of a perovskite liquid film, and the surface to be dried 100 can be placed in a closed cavity of a vacuum drying device.

[0040] Reference Figure 3 and Figure 4 The laminar plate 1 includes a plurality of air inlets 15, a plurality of first connection holes 13, a first surface 11 and a second surface 12 opposite to each other, and may further include a confluence cavity 14. The first surface 11 of the laminar plate 1 is the surface of the laminar plate 1 facing the surface 100 to be dried, and the second surface 12 of the laminar plate 1 is the surface of the laminar plate 1 away from the surface 100 to be dried. Specifically, the first surface 11 and the second surface 12 may be opposite surfaces of the laminar plate 1 along the thickness direction thereof. The first surface 11 may be adapted to the surface 100 to be dried, and specifically, the shape and size of the first surface 11 may be the same or similar to the shape and size of the surface 100 to be dried.

[0041] Reference Figure 5 The air inlet 15 is formed concave from the first surface 11 in the direction toward the second surface 12, so that the air inlet 15 faces the surface to be dried 100. The aperture of the air inlet 15 gradually decreases along the concave direction of the air inlet 15, so that the air inlet 15 forms a hollow truncated cone structure. The aperture of the air inlet 15 facing the first surface 11 is larger, and the aperture of the air inlet 15 facing the second surface 12 is smaller. Among them, the concave direction of the air inlet 15 can be parallel to the thickness direction of the laminar plate 1, and the axial direction of the air inlet 15 can be parallel to the thickness direction of the laminar plate 1.

[0042] When the laminar flow plate 1 is placed above the surface to be dried 100, the air inlet 15 faces the surface to be dried 100, and the air inlet 15 draws the vapor evaporated on the surface to be dried 100 into the laminar flow plate 1 from the air inlet 15 under the negative pressure supplied by the vacuum generating device. By placing the laminar flow plate 1 above the surface to be dried 100, that is, the air inlet 15 is located above the surface to be dried 100, the vapor generated on the surface to be dried 100 can flow upward to be absorbed by the air inlet 15. The vapor on the surface to be dried 100, especially the vapor in the middle part of the surface to be dried 100, does not need to flow horizontally to the edge of the surface to be dried 100 in advance, thereby reducing the influence of the horizontal flow of the vapor generated on the surface to be dried 100 on the evaporation rate at various locations on the surface to be dried 100, and improving the uniformity of the evaporation rate at various locations on the surface to be dried 100.

[0043] By setting the aperture of the air inlet 15 to gradually decrease along the concave direction thereof, the steam generated by the to-be-dried surface 100 located directly below the edge of the air inlet 15 can be guided by the side profile of the truncated cone-shaped structure formed by the air inlet 15, and then flow obliquely to the end of the air inlet 15 facing the second surface 12. Therefore, the lateral flow of the steam generated by the to-be-dried surface 100 located directly below the edge of the air inlet 15 can be reduced, and the uniformity of the evaporation rate at various locations on the to-be-dried surface 100 can be improved.

[0044] Reference Figure 3 , multiple air inlets 15 can be evenly distributed on the first surface 11, so that the multiple air inlets 15 can evenly absorb the steam generated by the surface to be dried 100 located below the first surface 11. Specifically, when the surface to be dried 100 is a rectangular surface, the first surface 11 is also a rectangular surface, and multiple air inlets 15 are distributed in a rectangular array on the first surface 11, and the spacing between adjacent air inlets 15 in the same row is the same as the spacing between adjacent air inlets 15 in the same column. Among them, the spacing between adjacent air inlets 15 in the same row can be zero or a smaller value, so that the adjacent air inlets 15 in the same row are arranged in abutment or proximity. The smaller value of the spacing between adjacent air inlets 15 in the same row can be 5%, 3%, 2%, 1% or 0.5% of the aperture of the air inlet 15 facing the first surface 11. In addition, the smaller value of the spacing between adjacent air inlets 15 in the same row can also be other numerical ranges, which are not limited here.

[0045] Reference Figure 5 When the air inlet 15 absorbs the steam generated by the drying surface 100, the steam generated by the drying surface will fill the air inlet 15 and gradually move along the shape of the air inlet 15 to the end of the air inlet 15 facing the second surface 12. Therefore, the size of the hollow truncated cone structure formed by the air inlet 15 will affect the flow path of the steam generated by the drying surface 100, and further affect the evaporation rate of various places on the drying surface 100. In order to reduce the lateral movement of the steam generated by the drying surface 100 when being absorbed by the air inlet 15, the aperture of the air inlet 15 adjacent to the first surface 11 can be set to 1-300mm; the angle ɑ formed by the side of the truncated cone structure formed by the air inlet 15 and the first connecting hole 13 can be 70-150°.

[0046] One end of the first connection hole 13 is connected to the air intake port 15, and the other end is directly or indirectly connected to the outside world. The end of the first connection hole 13 connected to the outside world can be directly or indirectly connected to the vacuum generating device to achieve the connection between the laminar plate 1 and the vacuum generating device. The number of first connection holes 13 can be the same as the number of air intake ports 15, and they are connected one by one. The first connection hole 13 can be a hole extending along the thickness direction of the laminar plate 1, that is, the axial direction of the first connection hole 13 can be the same as the axial direction of the air intake port 15; and the aperture of the first connection hole 13 can be the same as the aperture of the end of the air intake port 15 facing the second surface 12, so that the steam in the air intake port 15 can smoothly transition to the first connection hole 13.

[0047] Reference Figure 4 and Figure 6 The confluence cavity 14 is connected to the plurality of first connection holes 13, so that the first connection holes 13 are connected to the outside through the confluence cavity 14 connected to the first connection holes 13. The steam sucked by the air inlet 15 will flow into the first connection hole 13 connected to the air inlet 15, and then the steam in the plurality of first connection holes 13 will further flow into the confluence cavity 14 connected to the plurality of first connection holes 13, so that the steam sucked by the plurality of air inlets 15 will converge into the corresponding confluence cavity 14, and then the steam can be led out of the laminar flow plate 1 from the confluence cavity 14.

[0048] Among them, refer to Figures 2 to 4 , the laminar plate 1 can be a rectangular plate structure as a whole, and the confluence cavity 14 is formed by being recessed from the second surface 12, and the concave direction of the confluence cavity 14 can be parallel to the thickness direction of the laminar plate 1, and the upper and lower surfaces of the laminar plate 1 forming a rectangular plate structure form the first surface 11 and the second surface 12; or, refer to Figure 8 and Fig. 9 The laminar flow plate 1 may include a plurality of hollow truncated cones 16 and a plurality of raised portions 17 integrally connected to the truncated cones 16. An air inlet 15 is formed in each truncated cone 16, and the surface of the truncated cone 16 facing the surface to be dried 100 forms a first surface 11, and the surface of the raised portion 17 facing away from the surface to be dried 100 forms a second surface 12. The raised portion 17 may correspond to the shape of the confluence cavity 14, and the interior of each raised portion 17 is hollow to form a confluence cavity 14 and a plurality of first connecting holes 13 connected to the confluence cavity 14. When a plurality of confluence cavities 14 are provided, a plurality of raised portions 17 may be provided correspondingly.

[0049] As a preferred embodiment, the plurality of first connection holes 13 connected to the same confluence chamber 14 are distributed in an annular array, and the central part of the confluence chamber 14 is located at the center of the annular array of the plurality of first connection holes 13 connected to the confluence chamber 14. Therefore, the distance from each first connection hole 13 to the central part of the confluence chamber 14 connected to the first connection hole 13 is the same, so that the distance of the steam flowing from the first connection hole 13 to the central part of the confluence chamber 14 is the same. After the steam is sucked from the air inlet 15 of the same structure, it flows into the confluence chamber 14 through the first connection hole 13 of the same structure, and then flows the same distance to the central part of the confluence chamber 14, that is, the flow distance of the steam from each air inlet 15 to the central part of the corresponding confluence chamber 14 is the same, so that the steam can be evenly extracted by the plurality of air inlet 15 and realize uniform flow in the laminar plate 1, thereby improving the uniformity of the steam rate at various locations of the surface 100 to be dried when the laminar plate 1 extracts the steam.

[0050] Specifically, refer to Figure 6 , the confluence cavity 14 may include a first branch portion 141 and a first confluence portion 142 located at the central part of the confluence cavity 14. A plurality of first branch portions 141 are provided, and the number of first branch portions 141 may be the same as the number of first connection holes 13 connected to the confluence cavity 14, and the plurality of first branch portions 141 are connected to the plurality of first connection holes 13 in a one-to-one correspondence. One end of the first branch portion 141 is connected to the first confluence portion 142, and the other end of the first branch portion 141 is connected to the first connection hole 13. The plurality of first branch portions 141 have the same shape and size. The plurality of first branch portions 141 are distributed in a circular array around the first confluence portion 142, so that the steam in the plurality of first branch portions 141 can be evenly distributed in the first confluence portion 142 after flowing into the first confluence portion 142, thereby improving the uniformity of steam flow.

[0051] In this embodiment, the steam sucked by every four air inlets 15 converges into a confluence chamber 14. Specifically, each confluence chamber 14 is provided with four first branch portions 141, each first branch portion 141 is connected to a first connection hole 13, and the four first connection holes 13 connected to the same confluence chamber 14 are distributed in a square at the four corners, and the four air inlets 15 connected to the four first connection holes 13 are also distributed in a square at the four corners. The laminar plate 1 can be provided with a plurality of air inlets 15, for example, the air inlets 15 are provided with 32, 64 or 128, and the confluence chamber 14 can be provided with 8, 16 or 32 correspondingly.

[0052] Reference Figure 1 and Figure 8The utility model also provides a laminar plate assembly, including an equalizing plate 2 and the above-mentioned laminar plate 1. The equalizing plate 2 can be arranged on the side of the laminar plate 1 away from the surface to be dried 100, and is used to receive the steam in the laminar plate 1; that is, after the steam is sucked into the laminar plate 1 from the air inlet 15 of the laminar plate 1 and converged in the convergence chamber 14 for the first time, it can further flow into the laminar plate 1 for the second convergence.

[0053] Reference Figure 7 , the averaging plate 2 includes a plurality of second connecting holes 22 and an averaging chamber 21 connected to the plurality of second connecting holes 22. The second connecting hole 22 is arranged on the side of the averaging plate 2 facing the laminar plate 1, and the second connecting hole 22 is connected to the confluence chamber 14 of the laminar plate 1, specifically connected to the first confluence portion 142 located in the center of the confluence chamber 14, and after the plurality of air inlets 15 converge from the first connecting hole 13 and the first branch portion 141 to the corresponding first confluence portion 142, they will flow into the averaging plate 2 through the second connecting hole 22 connected to the first confluence portion 142. The averaging chamber 21 is arranged on the side of the averaging plate 2 away from the laminar plate 1, and the plurality of second connecting holes 22 connected to the same averaging chamber 21 introduce the steam in the plurality of confluence chambers 14 connected to the plurality of second connecting holes 22 into the averaging chamber 21 to achieve a second confluence. Among them, the axial direction of the second connecting hole 22 can be the same as the thickness direction of the laminar plate 1.

[0054] Among them, refer to Figure 7 The averaging plate 2 may be a rectangular plate structure as a whole, and the averaging cavity 21 is formed by being concave from the surface of the averaging plate 2 facing away from the laminar flow plate 1, and the concave direction of the averaging cavity 21 may be the same as the thickness direction of the laminar flow plate 1; a plurality of averaging cavities 21 are formed together in the averaging plate 2. Alternatively, referring to Fig.10 , there can be multiple averaging plates 2, each averaging plate 2 is hollow inside and forms an averaging cavity 21 and multiple second connecting holes 22 connected to the averaging cavity 21; each averaging plate 2 is connected to the corresponding position of the laminar plate 1 so that the second connecting hole 22 of the averaging plate 2 is connected to the first conduit 142 of the laminar plate 1.

[0055] As a preferred embodiment, the plurality of second connection holes 22 connected to the same dividing chamber 21 are distributed in a circular array, and the central part of the dividing chamber 21 is located at the center of the circular array of the plurality of second connection holes 22 connected to the dividing chamber 21. Therefore, the distance from each second connection hole 22 to the central part of the dividing chamber 21 connected to the second connection hole 22 is the same, so that the distance of the steam flowing from the second connection hole 22 to the central part of the dividing chamber 21 is the same. That is, after the steam is sucked into the laminar plate 1 from each air inlet 15, the flow distance from the laminar plate 1 to the central part of the dividing chamber 21 in the dividing plate 2 is the same, so that the steam can be uniformly extracted by the plurality of air inlets 15 and uniformly flow in the laminar plate assembly, thereby improving the uniformity of the steam rate at various locations of the surface 100 to be dried when the laminar plate assembly extracts steam.

[0056] Specifically, refer to Figure 7 , the evenly-dividing chamber 21 includes a plurality of second branch portions 212 and a second confluence portion 211 located at the center of the evenly-dividing chamber 21. The plurality of second branch portions 212 are all connected to the second confluence portion 211, and one end of each second branch portion 212 is connected to the second confluence portion 211, and the other end is connected to a second connection hole 22. The number of second branch portions 212 can be the same as the number of second connection holes 22, and the plurality of second branch portions 212 are connected to the plurality of second connection holes 22 in a one-to-one correspondence. The steam in the plurality of confluence chambers 14 converges into the second confluence portion 211 through the second connection holes 22 and the second branch portions 212 to achieve secondary confluence. The plurality of second branch portions 212 have the same shape and size. The plurality of second branch portions 212 are distributed in a circular array around the second confluence portion 211, so that the steam in the plurality of second branch portions 212 can be evenly distributed in the second confluence portion 211 after flowing into the second confluence portion 211, thereby improving the uniformity of steam flow.

[0057] In this embodiment, the steam in every four converging chambers 14 converges into one evenly distributing chamber 21. Specifically, each evenly distributing chamber 21 is provided with four second branch portions 212, each second branch portion 212 is connected to a second connecting hole 22, and the four second connecting holes 22 connected to the same evenly distributing chamber 21 are distributed in a square at the four corners, and the four converging chambers 14 connected to the four second connecting holes 22 are also distributed in a square at the four corners. When the converging chambers 14 are provided with 8, 16 or 32, the evenly distributing chambers 21 may be provided with 2, 4 or 8 correspondingly.

[0058] It should be noted that when the area of ​​the surface 100 to be dried is small, the number of air inlets 15 provided on the laminar plate 1 is also small. At this time, the steam can be connected to the vacuum drying device after passing through the laminar plate 1 for one convergence. For example, the first confluence part 142 of the laminar plate 1 is connected to the vacuum drying device through a connecting pipeline. When the area of ​​the surface 100 to be dried is large, the number of air inlets 15 provided on the laminar plate 1 is large. At this time, a laminar plate assembly having a laminar plate 1 and an equalizing plate 2 can be used to conduct a secondary convergence of the steam and then connect it to the vacuum drying device. For example, the second confluence part 211 in the laminar plate assembly is connected to the vacuum drying device through a connecting pipeline.

[0059] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the utility model. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the utility model without departing from the principles and purpose of the utility model. All of these changes should fall within the scope of protection of the claims of the utility model.

Claims

1. A laminar flow plate, characterized in that: include: A first surface and a second surface opposite to each other, wherein the first surface faces the surface to be dried; A plurality of air inlets, the air inlets being arranged above the surface to be dried and used to absorb steam generated by the surface to be dried, the air inlets being formed concavely from the first surface in a direction toward the second surface, and the aperture of the air inlets being gradually reduced along the concave direction of the air inlets; the plurality of air inlets being evenly distributed on the first surface; A plurality of first connection holes, one end of each of the first connection holes is connected to the air inlet, and the other end of the first connection hole is connected to the outside.

2. The laminar flow plate according to claim 1, characterized in that The diameter of the air intake port used to connect to one end of the first connecting hole is the same as the diameter of the first connecting hole; the axial direction of the air intake port coincides with the axial direction of the first connecting hole; wherein the axial direction of the air intake port is parallel to the thickness direction of the laminar plate.

3. The laminar flow plate according to claim 1, characterized in that The aperture of the air intake port adjacent to one end of the first surface is 1-300 mm; the air intake port forms a hollow truncated cone structure, and the angle formed by the side surface of the truncated cone structure formed by the air intake port and the first connecting hole is 70-150°.

4. The laminar flow plate according to claim 1, characterized in that The first surface is a rectangular surface, and a plurality of the air inlets are distributed on the first surface in a rectangular array, and the spacing between adjacent air inlets in the same row is the same as the spacing between adjacent air inlets in the same column.

5. The laminar flow plate according to claim 1, characterized in that It also includes at least one confluence cavity, which is connected to multiple first connecting holes; multiple first connecting holes connected to the same confluence cavity are distributed in a circular array; the central part of the confluence cavity is located at the center of the circular array of multiple first connecting holes connected to the confluence cavity.

6. The laminar flow plate according to claim 5, characterized in that The confluence cavity includes a first branch portion and a first confluence portion located in the central part of the confluence cavity; a plurality of first branch portions are provided, and the plurality of first branch portions are distributed in a ring array around the first confluence portion, one end of the first branch portion is connected to the first confluence portion, and the other end of the first branch portion is connected to the first connecting hole.

7. The laminar flow plate according to claim 6, characterized in that Each of the confluence chambers is provided with four first branch portions, each of the first branch portions is communicated with one of the first connection holes, and the four first connection holes communicated with the same confluence chamber are distributed in the form of a square at the four corners.

8. The laminar flow plate according to claim 5, characterized in that The laminar plate is a rectangular plate structure, and the confluence cavity is formed by a depression from the second surface; Alternatively, the laminar plate includes a truncated cone portion and a raised portion connected to the truncated cone portion, the truncated cone portion is hollow inside to form the air inlet, and the raised portion is hollow inside to form a confluence cavity and a plurality of first connecting holes connected to the confluence cavity.

9. A laminar flow plate assembly, characterized in that: include: The laminar flow plate according to any one of claims 1 to 8, provided with a confluence cavity connected to a plurality of the first connection holes; An averaging plate comprises a plurality of second connecting holes and an averaging cavity connected to the plurality of second connecting holes, wherein the second connecting holes are connected to a converging cavity of the laminar flow plate, and the plurality of second connecting holes connected to the same averaging cavity are distributed in a circular array, and a central portion of the averaging cavity is located at the center of the circular array of the plurality of second connecting holes connected to the averaging cavity.

10. The laminar flow plate assembly according to claim 9, characterized in that The dividing cavity includes a plurality of second branches and a second confluence located in the central part of the dividing cavity. The plurality of second branches are distributed in a circular array around the second confluence. One end of the second branch is connected to the second confluence, and the other end of the second branch is connected to the second connecting hole.

11. The laminar flow plate assembly according to claim 10, characterized in that Each of the evenly-dividing cavities is provided with four second branch portions, each of the second branch portions is communicated with one of the second connecting holes, and the four second connecting holes communicated with the same evenly-dividing cavity are distributed in the form of a square at the four corners.

12. The laminar flow plate assembly according to claim 9, characterized in that The distributing cavity is formed by being concave from the surface of the distributing plate facing away from the laminar flow plate, or the distributing plate is hollow inside to form the distributing cavity.

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