Wet curtain structure and cooling equipment having the same

Abstract

The present invention provides a wet curtain structure and a cooling device having the same. The wet curtain structure includes a plurality of wet curtain sheets. There is a flow space for airflow between two adjacent wet curtain sheets. Each wet curtain sheet is used to arrange fluid. At least one of the plurality of wet curtain sheets is provided with a corrugated portion and a flow guide hole for guiding the fluid. The flow guide hole is a long strip through hole. The flow guide hole passes through the opposite sides of the wet curtain sheet. With the above arrangement, the wet curtain structure of this embodiment is based on the honeycomb structure of the existing traditional wet curtain. A plurality of long strip-shaped hole structures are provided at a certain distance on each corrugated sheet. The long strip holes cooperate with the corrugated portion to guide the fluid on the wet curtain sheet. The wet curtain structure of the present invention solves the problem of low evaporation rate of the wet curtain in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of wet curtains, and in particular to a wet curtain structure and a cooling device having the same. Background Art

[0002] Wet curtain evaporative cooling equipment is widely used in homes, greenhouses, livestock and poultry houses, high-temperature workshops, theaters and other places, such as household cooling fans, industrial cooling towers, etc. Compared with existing commonly used cooling equipment, wet curtain evaporative cooling equipment has many advantages such as low cost, low energy consumption, simple operation, and reliable operation, so it is very popular with consumers. The operation process of wet curtain evaporative cooling equipment can be simply described as: the water pump pumps water into the water receiving box at the top of the wet curtain, and pours it to the top of the wet curtain through the drain hole at the bottom of the water receiving box, and then the water forms a wet film on the surface of the wet curtain during the downward flow. The rotation of the fan blades generates wind pressure, and the hot air passes through the wet curtain, accelerating the evaporation of the wet film, converting the sensible heat of the hot air into latent heat, and reducing the dry bulb temperature to achieve the cooling effect.

[0003] The existing traditional wet curtain is made of multiple layers of plant fiber paper, each of which is processed into a corrugated belt shape, and the whole looks like a neatly arranged honeycomb. Each layer of corrugated belt has a flow channel with a cross-section similar to a sine wave. The flow channels of adjacent layers of corrugated belts overlap with each other, forming channels that are inclined in two directions, upward and downward. In the channels, air and water can directly contact each other for heat and moisture exchange. Traditional wet curtains generally have the problem of low evaporation efficiency, which affects the cooling effect. The main reason for this problem is that the wet film area on the surface of the wet curtain is unevenly distributed, causing part of the wet curtain to be in a dry state and part to be in an oversaturated state, which seriously affects the evaporation efficiency.

[0004] In order to solve the above problems, the prior art has proposed an optimization solution based on the traditional wet curtain structure, that is, a flat sheet is set between every two corrugated sheets, and the material of the flat sheet is a water-absorbing material. This structure can increase the evaporation area of ​​water without basically increasing wind resistance, and can accelerate the water infiltration speed. However, since the traditional wet curtain is made of multiple corrugated sheets bonded together, ranging from dozens to hundreds of sheets, if a flat sheet is set between every two corrugated sheets, the material cost will increase greatly, and if the width of the wet curtain is limited, the increase of the flat sheet will lead to a reduction in the number of corrugated sheets, thereby reducing the number of ventilation channels, and then causing a reduction in air volume and evaporation area, affecting the cooling effect. Summary of the invention

[0005] The main purpose of the present invention is to provide a wet curtain structure and a cooling device having the same, so as to solve the problem of low evaporation rate of the wet curtain in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a wet curtain structure is provided, comprising: a plurality of wet curtain sheets, wherein a flow space for airflow to pass through is provided between two adjacent wet curtain sheets; wherein at least one of the plurality of wet curtain sheets is provided with a corrugated portion and a guide hole for guiding the fluid, the guide hole comprising at least one guide hole segment, the guide hole segment being a long strip structure, and the guide hole passing through opposite sides of the wet curtain sheet.

[0007] Furthermore, two adjacent wet curtain sheets are each provided with a corrugated portion; wherein, in two adjacent wet curtain sheets, the corrugated portion of one wet curtain sheet is connected to the corrugated portion of another wet curtain sheet; and / or, in two adjacent wet curtain sheets, the angle between the extension direction of the corrugated portion of one wet curtain sheet and the extension direction of the corrugated portion of another wet curtain sheet is 90°.

[0008] Furthermore, the guide hole is a polygonal structure.

[0009] Furthermore, the length of the guide hole is a, and the width of the guide hole is b; wherein 4b≤a≤6b; and / or, the angle between the length direction of the guide hole and the extension direction of the corrugated portion is B; wherein 45°≤B≤135°.

[0010] Further, there are multiple guide holes, the multiple guide holes are divided into multiple guide hole rows, the multiple guide holes in each guide hole row are arranged at intervals along the first direction, and the multiple guide hole rows are arranged along the second direction.

[0011] Furthermore, the wet curtain sheet is a rectangular structure, the first direction is parallel to the length direction of the wet curtain sheet, and the second direction is parallel to the width direction of the wet curtain sheet.

[0012] Furthermore, the distance between two adjacent guide holes in each guide hole row is equal to the length of the guide hole; and / or, along the second direction, on the same wet curtain sheet, the distance between the two nearest guide holes in two adjacent guide hole rows is d, and the length of the guide hole is b; wherein b≤d≤2b.

[0013] Further, there are a plurality of guide holes, which are arranged at intervals; and / or, the guide hole includes two guide hole sections, which are arranged crosswise with each other.

[0014] Further, the angle between the extension directions of the two guide hole sections of the guide hole is D; wherein the angle of D is 90°.

[0015] Furthermore, the wet curtain sheet is made of materials including plant fiber paper, plastic and metal; and / or, the guide holes are formed by stamping.

[0016] According to another aspect of the present invention, a refrigeration device is provided, comprising a wet curtain structure, wherein the wet curtain structure is the wet curtain structure described above.

[0017] The technical solution of the present invention is applied, and the wet curtain structure of the present invention includes a plurality of wet curtain sheets, and there is a flow space for air flow between two adjacent wet curtain sheets, and each wet curtain sheet is used to arrange fluid; wherein, at least one of the plurality of wet curtain sheets is provided with a corrugated portion and a guide hole for guiding the fluid, and the guide hole is a long strip through hole, and the guide hole passes through the opposite sides of the wet curtain sheet. With the above arrangement, the wet curtain structure of this embodiment is based on the honeycomb structure of the existing traditional wet curtain, and a plurality of long strip-shaped hole structures are arranged at a certain distance on each corrugated sheet, and the long strip holes cooperate with the corrugated portion to guide the fluid on the wet curtain sheet. Through CFD fluid simulation analysis, it is concluded that the setting of the guide hole can effectively solve the problem that the water flows along the corrugated direction when the wet curtain is distributing liquid, causing uneven distribution of wet film on the surface of the wet curtain. At the same time, after the guide hole is opened, the vortex intensity in the process of water and air flow can be increased, which is conducive to reducing the air thermal resistance, strengthening the heat transfer between water and air, and then improving the temperature drop, solving the problem of low evaporation rate of the wet curtain in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic structural diagram of an embodiment of a wet curtain structure according to the present invention is shown;

[0020] Figure 2 A schematic structural diagram of a wet curtain sheet of the wet curtain structure of the present invention is shown;

[0021] Figure 3 Shows Figure 2 A top view of a wet curtain sheet of a wet curtain structure of the present invention;

[0022] Figure 4 A schematic structural diagram showing an embodiment of the guide hole of the wet curtain structure of the present invention;

[0023] Figure 5 Shows Figure 4 A top view of the guide holes of the wet curtain structure of the present invention;

[0024] Figure 6 A schematic structural diagram showing another embodiment of the guide hole of the wet curtain structure of the present invention;

[0025] Figure 7 Shows Figure 6 A schematic structural diagram of the guide holes of the wet curtain structure of the present invention.

[0026] The above drawings include the following reference numerals:

[0027] 1. Wet curtain; 2. Corrugated part; 3. Diversion hole; 31. Diversion hole section. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] See also Figures 1 to 7 The wet curtain structure of this embodiment includes: a plurality of wet curtain sheets 1, and a flow space for airflow to pass through is provided between two adjacent wet curtain sheets 1; wherein, at least one wet curtain sheet 1 among the plurality of wet curtain sheets 1 is provided with a corrugated portion 2 and a guide hole 3 for guiding the fluid, and the guide hole 3 includes at least one guide hole segment 31, and the guide hole segment 31 is a long strip structure, and the guide hole 3 runs through the opposite sides of the wet curtain sheet 1.

[0030] With the above-mentioned setting, the wet curtain structure of this embodiment is based on the honeycomb structure of the existing traditional wet curtain. A number of long strip-shaped hole structures are set at a certain distance on each corrugated sheet. The long strip holes cooperate with the corrugated part 2 to guide the fluid on the wet curtain sheet 1. Through CFD fluid simulation analysis, it is found that the setting of the guide holes can effectively solve the problem that when the wet curtain is distributing liquid, the water flows along the corrugated direction, causing uneven distribution of the wet film on the surface of the wet curtain. At the same time, after the guide holes are opened, the vortex intensity in the process of water and air flow can be increased, which is conducive to reducing the air thermal resistance, strengthening the heat transfer between water and air, and then improving the temperature drop, solving the problem of low evaporation rate of the wet curtain in the prior art.

[0031] In the wet curtain structure of this embodiment, see Figures 1 to 5 , two adjacent wet curtain sheets 1 are each provided with a corrugated portion 2; wherein, in two adjacent wet curtain sheets 1, the corrugated portion 2 of one wet curtain sheet 1 is connected to the corrugated portion 2 of the other wet curtain sheet 1; and / or, in two adjacent wet curtain sheets 1, the angle between the extension direction of the corrugated portion 2 of one wet curtain sheet 1 and the extension direction of the corrugated portion 2 of the other wet curtain sheet 1 is 90°.

[0032] In some embodiments, Figure 1 As shown, the wet curtain sheet 1 is composed of multiple wet curtain sheets 1, and the wet curtain sheet 1 is pressed into a corrugated structure similar to a sine wave by a corrugator. The sheets are cross-bonded, and the corrugations of two adjacent sheets form an angle of about 90°.

[0033] like Figure 3 , Figure 5 , Figure 7 As shown, the direction in which the dotted line extends is the direction of the corrugation.

[0034] In order to achieve better drainage effect, see Figures 1 to 5In the wet curtain structure of the present embodiment, the guide hole 3 is a polygonal structure; and / or, there are multiple guide holes 3, and the multiple guide holes 3 are arranged at intervals.

[0035] In the wet curtain structure of this embodiment, see Figures 1 to 5 , the length of the guide hole 3 is a, and the width of the guide hole 3 is b; wherein 4b≤a≤6b; and / or, the angle between the length direction of the guide hole 3 and the extension direction of the corrugated portion 2 is B; wherein 45°≤B≤135°.

[0036] In some embodiments, the width of the guide hole 3 is b, wherein 4b≤a≤6b. Thus, when the fluid is distributed along the length direction of the guide hole 3, the fluid can reach the periphery of the guide hole 3, making the distribution of the fluid more uniform.

[0037] In some embodiments, the angle between the length direction of the guide hole 3 and the extension direction of the corrugated portion 2 is B; wherein 45°≤B≤135°, so that the guide hole 3 can achieve an effective drainage effect. Figure 3 In the preferred embodiment shown, B = 90°.

[0038] See also Figures 1 to 7 In the wet curtain structure of this embodiment, there are multiple guide holes 3, and the multiple guide holes 3 are divided into multiple guide hole rows. The multiple guide holes 3 in each guide hole row are arranged at intervals along the first direction, and the multiple guide hole rows are arranged along the second direction.

[0039] In the wet curtain structure of this embodiment, see Figures 1 to 5 The wet curtain sheet 1 is a rectangular structure, the first direction is parallel to the length direction of the wet curtain sheet 1, and the second direction is parallel to the width direction of the wet curtain sheet 1.

[0040] The guide hole 3 is rectangular, that is, the angle C between the long side and the short side is 90°.

[0041] See also Figures 1 to 5 In the wet curtain structure of the present embodiment, the distance between two adjacent guide holes 3 in each guide hole row is equal to the length of the guide hole 3; and / or, along the second direction, on the same wet curtain sheet 1, the distance between the two nearest guide holes 3 in two adjacent guide hole rows is d, and the length of the guide hole 3 is b; wherein b≤d≤2b.

[0042] By adopting the above arrangement, the plurality of guide holes 3 can be more effectively distributed on the wet curtain sheet 1, thereby ensuring effective guide while also ensuring the strength of the wet curtain sheet 1.

[0043] In some embodiments, the arrangement of the guide holes 3 is that in the horizontal direction, the distance between two adjacent guide holes 3 is equal to the length of the long side of the guide holes 3, that is, c=b; in the vertical direction, the distance between two adjacent guide holes 3 is between 1 and 2 times the length of the long side of the guide holes 3, that is, b≤d≤2b.

[0044] In the wet curtain structure of this embodiment, see Figure 6 to Figure 7 There are multiple guide holes 3, and the multiple guide holes 3 are arranged at intervals; and / or, the guide hole 3 includes two guide hole sections 31, and the two guide hole sections 31 are arranged crosswise.

[0045] See also Figure 6 to Figure 7 In order to achieve a better diversion effect, in the wet curtain structure of this embodiment, the angle between the extension directions of the two diversion hole segments 31 of the diversion hole 3 is D; wherein the angle D is 90°.

[0046] In the wet curtain structure of this embodiment, see Figures 1 to 7 The wet curtain sheet 1 is made of materials including plant fiber paper, plastic and metal; and / or, the guide hole 3 is formed by stamping.

[0047] The cooling device of this embodiment includes a wet curtain structure, and the wet curtain structure is the wet curtain structure mentioned above.

[0048] In some embodiments, the angle between the long side direction of the guide hole 3 and the corrugation direction may also be between 0-45°, or between 135-180°, that is, 0≤B≤45° or 135°≤B≤180°. Figure 3 In the alternative embodiment shown, B=0.

[0049] In some embodiments, the guide hole 3 may also be a rectangle with unlimited lengths of long and short sides, or a quadrilateral of other shapes, that is, the angle C between the long side and the short side is ≠90°.

[0050] In some embodiments, the guide hole 3 may also be in an "X" shape, that is, formed by two quadrilaterals intersecting at a certain angle, such as Figure 7 In the alternative embodiment shown, the guide hole 3 is in the shape of two rectangles intersecting at 90°, that is, D=90°.

[0051] In some embodiments, the guide holes 3 on a single wet curtain sheet 1 may also have different sizes and shapes, and the distances between two adjacent guide holes 3 may be unequal.

[0052] The description of the wet curtain structure of this embodiment is as follows:

[0053] The flow field of the wet curtain sheet 1 is simulated by CFD computational fluid dynamics, and the surface liquid distribution area and vortex intensity of the wet curtain sheet 1 are analyzed respectively. By analyzing the simulation results, it can be concluded that when the guide hole 3 is not set, the water will flow along the ripple direction, so nearly half of the area of ​​the wet curtain sheet 1 cannot be fully distributed, while the other half of the area of ​​the wet curtain sheet 1 will always be fully distributed to reach an oversaturated state, resulting in uneven distribution of wet film on the surface of the wet curtain sheet 1 and low evaporation efficiency of the wet curtain sheet 1; after the rectangular guide hole 3 is set, the water will change the flow direction under the influence of the guide hole 3, so that every part of the wet curtain sheet 1 can be fully distributed. The quantitative comparison of the liquid distribution area on the surface of the wet curtain sheet 1 without the guide hole 3 and with the rectangular guide hole 3 is shown in the following table. It can be seen that the liquid distribution area on the surface of the wet curtain sheet 1 with the rectangular guide hole 3 accounts for 63.88% of the surface area of ​​the wet curtain sheet 1, which is much higher than the wet curtain sheet 1 without the guide hole 3. This shows that the liquid distribution uniformity of the wet curtain sheet 1 is greatly improved after the rectangular guide hole 3 is provided, and further shows that the evaporation efficiency of the wet curtain sheet 1 will be greatly improved.

[0054] Table 1 Comparison of CFD liquid distribution area

[0055] Wet curtain 1 type <![CDATA[Liquid distribution area mm 2 > Liquid distribution area % No diversion hole 3 is set 2335.37 47.03 Set rectangular diversion hole 3 2676.57 63.88

[0056] By analyzing the comparison of the vortex intensity on the surface of the wet curtain sheet 1 without the guide hole 3 and with the rectangular guide hole 3 during the normal liquid distribution process, it can be concluded that the wet curtain sheet 1 without the guide hole 3 has vortices in only a small area on the surface, while the wet curtain sheet 1 with the rectangular guide hole 3 will have a strong vortex at the guide hole 3. Based on heat transfer, the increase in vortex intensity is conducive to reducing the air thermal resistance, strengthening the heat transfer between water and air, and thus improving the temperature drop effect. The quantitative comparison of the vortex intensity on the surface of the wet curtain sheet 1 without the guide hole 3 and with the rectangular guide hole 3 is shown in the following table. It can be seen that the vortex intensity in the flow field of the wet curtain sheet 1 with the rectangular guide hole 3 is significantly improved compared with that without the guide hole 3, which further indicates that the temperature drop effect of the wet curtain sheet 1 with the rectangular guide hole 3 will be greatly improved.

[0057] Table 2 Comparison of CFD simulation vortex intensity

[0058]

[0059]

[0060] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0061] The wet curtain structure of the present invention comprises a plurality of wet curtain sheets 1, and there is a flow space for airflow between two adjacent wet curtain sheets 1, and each wet curtain sheet 1 is used to arrange fluid; wherein, at least one wet curtain sheet 1 among the plurality of wet curtain sheets 1 is provided with a corrugated portion 2 and a flow guide hole 3 for guiding fluid, and the flow guide hole 3 is a long strip through hole, and the flow guide hole 3 passes through the opposite sides of the wet curtain sheet 1. With the above arrangement, the wet curtain structure of the present embodiment is based on the honeycomb structure of the existing traditional wet curtain, and a plurality of long strip-shaped hole structures are arranged at a certain distance on each corrugated sheet, and the long strip holes cooperate with the corrugated portion 2 to guide the fluid on the wet curtain sheet 1. Through CFD fluid simulation analysis, it is concluded that the provision of the flow guide hole can effectively solve the problem that the water flows along the corrugated direction when the wet curtain is distributing liquid, resulting in uneven distribution of wet film on the surface of the wet curtain. At the same time, the provision of the flow guide hole can increase the vortex intensity in the process of water and air flow, which is conducive to reducing the air thermal resistance, strengthening the heat transfer between water and air, and thus improving the temperature drop, solving the problem of low evaporation rate of the wet curtain in the prior art.

[0062] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0063] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0064] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0065] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0066] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wet curtain structure, characterized in that: include: A plurality of wet curtain sheets (1), wherein a flow space for airflow to pass through is provided between two adjacent wet curtain sheets (1); At least one of the plurality of wet curtain sheets (1) is provided with a corrugated portion (2) and a flow guide hole (3) for guiding a fluid, the flow guide hole (3) comprising at least one flow guide hole segment (31), the flow guide hole segment (31) being a long strip structure, and the flow guide hole (3) passes through two opposite sides of the wet curtain sheet (1); The angle between the length direction of the guide hole (3) and the extension direction of the corrugated portion (2) is B; wherein 45°≤B≤135°.

2. The wet curtain structure according to claim 1, characterized in that: The two adjacent wet curtain sheets (1) are each provided with the corrugated portion (2); wherein: In two adjacent wet curtain sheets (1), the corrugated portion (2) of one wet curtain sheet (1) is connected to the corrugated portion (2) of the other wet curtain sheet (1); and / or, In two adjacent wet curtain sheets (1), the angle between the extension direction of the corrugated portion (2) of one wet curtain sheet (1) and the extension direction of the corrugated portion (2) of the other wet curtain sheet (1) is 90°.

3. The wet curtain structure according to claim 1, characterized in that: The guide hole (3) is a polygonal structure; and / or, There are a plurality of guide holes (3), and the plurality of guide holes (3) are arranged at intervals.

4. The wet curtain structure according to claim 1, characterized in that: The length of the guide hole (3) is a, and the width of the guide hole (3) is b; wherein 4b≤a≤6b.

5. The wet curtain structure according to claim 1, characterized in that: There are a plurality of guide holes (3), and the plurality of guide holes (3) are divided into a plurality of guide hole rows. The plurality of guide holes (3) in each guide hole row are arranged at intervals along a first direction, and the plurality of guide hole rows are arranged along a second direction.

6. The wet curtain structure according to claim 5, characterized in that: The wet curtain sheet (1) is a rectangular structure, the first direction is parallel to the length direction of the wet curtain sheet (1), and the second direction is parallel to the width direction of the wet curtain sheet (1).

7. The wet curtain structure according to claim 5, characterized in that: The distance between two adjacent guide holes (3) in each guide hole row is equal to the length of the guide hole (3); and / or, Along the second direction, on the same wet curtain sheet (1), the distance between the two closest guide holes (3) in two adjacent guide hole rows is d, and the length of the guide hole (3) is b; wherein b≤d≤2b.

8. The wet curtain structure according to claim 1, characterized in that: There are a plurality of the guide holes (3), and the plurality of the guide holes (3) are arranged at intervals; and / or the guide hole (3) comprises two guide hole sections (31), and the two guide hole sections (31) are arranged crosswise with each other.

9. The wet curtain structure according to claim 8, characterized in that: The included angle between the extension directions of the two guide hole sections (31) of the guide hole (3) is D; wherein the angle D is 90°.

10. The wet curtain structure according to any one of claims 1 to 9, characterized in that: The wet curtain sheet (1) is made of plant fiber paper, plastic and metal; and / or, The flow guide hole (3) is formed by stamping.

11. A cooling device, comprising a wet curtain structure, characterized in that: The wet curtain structure is the wet curtain structure according to any one of claims 1 to 10.

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