A four-fold louvered ventilation shield structure

Abstract

The utility model provides a four -folding louvered window type ventilation protection structure, include: louver fixed frame and four -folding blade, louver fixed frame sets up in the ventilation opening of equipment cabinet, a plurality of four -folding blades are fixedly in the left and right two ends in louver fixed frame along vertical direction even interval, four -folding blade includes first hook piece, vertical blade, first turning blade, second turning blade, second hook piece, third turning blade, third hook piece, fourth turning blade, fourth hook piece connected in proper order, mutual shelter between adjacent four -folding blades, form the stepped water retaining barrier, when splashing, water spray with horizontal or big inclination or small inclination invasion, water flows out through the turning of turning blade and the flow guide effect, to play the effect of waterproof, by analogy, when dust follows the airflow (wind) and enters the louver also flows out the louver through multiple reflection.

Description

Technical Field

[0001] This utility model relates to the field of ventilation and protection technology, and in particular to a four-fold louvered ventilation and protection structure. Background Technology

[0002] With the widespread application of electrical equipment in various complex environments, the protection of its ventilation openings has become increasingly prominent. Currently, most electrical equipment ventilation openings on the market employ low-protection-level structures, such as simple grilles or louvered openings. While these designs can meet the ventilation and heat dissipation needs during normal operation to some extent, they have significant shortcomings in extreme weather conditions. During heavy rainfall, rainwater can easily seep into the equipment through the gaps in the ventilation openings. Strong winds can carry large amounts of sand and dust to the ventilation openings, which can then enter the equipment. This intrusion of rainwater and sand and dust directly leads to a significant increase in humidity inside the equipment. Sand and dust have strong adsorption and corrosive properties, adhering to the surface of electronic components. Over time, this corrodes the components, reducing their insulation resistance, which undoubtedly poses a significant safety hazard to the normal operation of the equipment. Electronic components operating in harsh environments with high humidity and low insulation resistance not only experience reduced performance and reliability but may also experience short circuits, malfunctions, and in severe cases, damage to the entire equipment, affecting its lifespan and normal functionality.

[0003] Taking charging pile equipment as an example, as a core infrastructure for new energy vehicles (EVs), its application scenarios are constantly expanding and enriching. From urban streets and parking lots to near-water scenarios such as ports and lakeside parks, as well as its widespread application in overseas markets, unprecedentedly high requirements have been placed on the protective performance of charging pile equipment. In near-water scenarios such as ports and lakeside parks, charging piles often face challenges such as high humidity air brought by sea breezes, seawater splashes, and salt spray corrosion unique to coastal areas. Overseas, the climate and environmental conditions vary greatly in different regions, and some areas experience frequent sandstorms, posing a severe test to the protection of the ventilation openings of charging piles. At the same time, given the ventilation and heat dissipation requirements of charging pile equipment and the adaptation requirements of its internal heat dissipation structures such as fans, while improving the protection level of ventilation openings, it is also necessary to ensure that the protective equipment is simple to manufacture, easy to implement, has low wind resistance, and is easy to work in conjunction with heat dissipation components such as fans. However, current ventilation opening protection solutions on the market are difficult to meet these mutually restrictive conditions simultaneously, and are unable to effectively solve a series of problems caused by the low protection level of existing ventilation openings.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of clearly and completely explaining the technical solutions of this application and facilitating the understanding of those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application.

[0005] In view of the above, a four-fold louvered ventilation and protection structure is needed that can adapt to complex environmental conditions, effectively prevent rainwater and sand dust intrusion, and has good ventilation performance. Utility Model Content

[0006] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a four-fold louvered ventilation and protection structure to solve the problem of poor waterproof, dustproof, and ventilation performance of equipment cabinets in complex outdoor environments. To achieve the above objective and other related objectives, this utility model provides a four-fold louvered ventilation and protection structure, which includes:

[0007] Louvered fixing frame, installed at the ventilation opening of the equipment cabinet;

[0008] Four-fold blades, multiple four-fold blades are fixed at even intervals along the vertical direction at both ends of the louver fixing frame;

[0009] The four-fold blade includes a first hook piece, a vertical blade, a first turning blade, a second turning blade, a second hook piece, a third turning blade, a third hook piece, a fourth turning blade, and a fourth hook piece connected in sequence, as well as a first fixing hole for the blade below the overlap of the first turning blade and the second turning blade, and a second fixing hole for the blade below the overlap of the third hook piece and the third turning blade.

[0010] The angle between the first hook blade and the vertical blade is R1, and 90°≤R1≤180°; the angle between the first turning blade and the vertical direction is R2, and 90°≤R2≤180°; the second turning blade is parallel to the vertical blade; the second hook blade and the third turning blade are collinear; the angle between the third turning blade and the second turning blade is R3, and 90°≤R3≤180°; the angle between the third turning blade and the fourth turning blade is R4, and 90°≤R4≤180°; the angle between the third hook blade and the fourth turning blade is R5, and 90°≤R5≤180°; the angle between the fourth turning blade and the fourth hook blade is R6, and R6≤90°.

[0011] Optionally, 120°≤R1≤180°, 90°≤R2≤120°, 120°≤R3≤180°, 120°≤R4≤180°, 90°≤R5≤120°, and 60°≤R6≤90°.

[0012] Optionally, R1=155°, R2=115°, R3=120°, R4=150°, R5=98.5°, and R6=60°.

[0013] Optionally, the four-fold blades are a one-piece molded structure.

[0014] Optionally, the four-fold louvered ventilation and protection structure further includes a filter layer, which is vertically arranged on the side of the louver fixing frame near the ventilation opening, and the filter layer is spaced at a preset distance from the four-fold blades and the ventilation opening.

[0015] Optionally, the upper fixed frame, left fixed frame, lower fixed frame and right fixed frame of the louver fixing frame form an accommodating space for placing the four-fold blades, and the two ends of the four-fold blades are fixedly mounted on the left fixed frame and the right fixed frame in the horizontal direction.

[0016] Optionally, the left fixing frame is provided with a first fixing hole and a second fixing hole arranged in a vertical array along the left fixing frame, wherein the first fixing hole is higher than the second fixing hole in the vertical direction; the right fixing frame is provided with a first fixing hole and a second fixing hole arranged in a vertical array along the right fixing frame, wherein the first fixing hole is higher than the second fixing hole in the vertical direction; the connecting structure fixes the two ends of the four-fold blade to the left fixing frame and the right fixing frame respectively through the first fixing hole of the blade, the first fixing hole of the left fixing frame, the first fixing hole of the right fixing frame, and the second fixing hole of the blade, the second fixing hole of the left fixing frame, and the second fixing hole of the right fixing frame.

[0017] Optionally, the upper fixed frame of the louver fixing frame is provided with a louver upper cover plate. The louver upper cover plate includes a cover plate and a hook plate. One end of the cover plate is fixed to the upper fixed frame, and the other end is fixedly connected to the hook plate. The hook plate faces the side close to the four-fold blade.

[0018] Optionally, the lower fixed frame is provided with a drain hole, and the shape of the drain hole is one or a combination of two or more of the following: circular, square, rectangular, elliptical, oblong, polygonal, and irregular.

[0019] Optionally, the front end of the lower fixed frame is provided with an upwardly extending baffle, and the lower fixed frame is provided with a circular first drain hole and an oblong second drain hole, the first drain hole being close to the baffle and the second drain hole being away from the baffle.

[0020] As described above, the four-fold louvered ventilation and protection structure of this utility model has the following beneficial effects.

[0021] In this embodiment of the four-fold louvered ventilation and protection structure, the four folds are evenly spaced vertically, with adjacent folds mutually shielding each other to form a stepped water barrier. When splashing or spraying water enters horizontally or at a large angle, the water flows out horizontally through the guiding effect of the folding blades. Combined with the secondary constraint of the water flow trajectory by the four hooks, the risk of liquid penetration can be reduced by more than 90%. When splashing or spraying water enters the louver at a small angle, the splashing or spraying water is directly sprayed onto the second folding blade, and can then be reflected multiple times by the folding blade. Each time it is reflected, some of the splashing or spraying water will flow out of the louver along the surface of the folding blade. By the same principle, the four folds can also block dust brought by sandstorms. The fixed four folds do not require angle adjustment during use, which facilitates the later maintenance of this four-fold louvered ventilation and protection structure. Assembly is convenient, which is conducive to large-scale promotion in the industry. Attached Figure Description

[0022] Figure 1 The image shown is a front view of the four-fold louvered ventilation and protection structure of this utility model.

[0023] Figure 2 The diagram shown is a cross-sectional view of the four-fold louvered ventilation and protection structure of this utility model.

[0024] Figure 3 The image shown is a perspective view of the four-fold blade of this utility model.

[0025] Figure 4 The image shown is a side view of the four-fold blade of this invention.

[0026] Figure 5 The image shown is a side view of the left (right) fixed frame of this utility model.

[0027] Figure 6 The image shown is a bottom view of the four-fold louvered ventilation and protection structure of this utility model.

[0028] Component labeling explanation.

[0029] 1. Louver fixing frame; 101. Upper fixing frame; 102. Left side fixing frame; 1021. First fixing hole of the left side fixing frame; 1022. Second fixing hole of the left side fixing frame; 103. Lower fixing frame; 1031. First drain hole; 1032. Second drain hole; 1033. Edge guard; 104. Right side fixing frame; 1041. First fixing hole of the right side fixing frame; 1042. Second fixing hole of the right side fixing frame; 105. Upper cover plate of the louver; 1051. Cover plate; 1052. Hook plate; 106. Inner surface of the louver fixing frame; 2. Four-fold blade; 201. First hook plate; 202. Vertical blade; 203. First turning blade; 204. Second turning blade; 205. 206. Second hook blade; 207. Third turning blade; 208. Fourth turning blade; 209. Fourth hook blade; 210. First fixing hole for blade; 211. Second fixing hole for blade; 3. Filter cotton layer; 301. Inner surface of filter cotton layer; 302. Outer surface of filter cotton layer; 4. Ventilation opening; R1. Angle between the first hook blade and the vertical blade; R2. Angle between the first turning blade and the vertical direction; R3. Angle between the third turning blade and the second turning blade; R4. Angle between the third turning blade and the fourth turning blade; R5. Angle between the third hook blade and the fourth turning blade; R6. Angle between the fourth turning blade and the fourth hook blade; Z1, Z2, Z3. Splash and spray water flow areas. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0031] Please see Figures 1 to 6 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0032] like Figures 1 to 4As shown, this embodiment provides a four-fold louvered ventilation and protection structure, which includes: a louver fixing frame 1 and four-fold blades 2; the louver fixing frame 1 is disposed at the ventilation opening 4 of the equipment cabinet; multiple four-fold blades 2 are evenly fixed at the left and right ends of the louver fixing frame 1 in a vertical direction, forming a louver; the four-fold blades 2 include a first hook 201, a vertical blade 202, a first turning blade 203, a second turning blade 204, a second hook 205, a third turning blade 206, a third hook 207, a fourth turning blade 208, and a fourth hook 209 connected in sequence, and a first fixing hole 210 provided below the overlap of the first turning blade 203 and the second turning blade 204, and a first fixing hole 210 provided below the overlap of the third hook 207 and the third turning blade 206. The blade has a second fixing hole 211; the angle between the first hook 201 and the vertical blade 202 is R1, and 90°≤R1≤180°; the angle between the first turning blade 203 and the vertical direction is R2, and 90°≤R2≤180°; the second turning blade 204 is parallel to the vertical blade 202; the second hook 205 and the third turning blade 206 are collinear; the angle between the third turning blade 206 and the second turning blade 204 is R3, and 90°≤R3≤180°; the angle between the third turning blade 206 and the fourth turning blade 208 is R4, and 90°≤R4≤180°; the angle between the third hook 207 and the fourth turning blade 208 is R5, and 90°≤R5≤180°; the angle between the fourth turning blade 208 and the fourth hook 209 is R6, and R6≤90°.

[0033] In this embodiment, the four-fold blades 2 are evenly spaced vertically, with adjacent blades blocking each other to form a stepped water barrier. When splashing or spraying water enters horizontally or at a large angle, the water flows out horizontally through the guiding effect of the folding blades. Combined with the secondary constraint of the water flow trajectory by the four hooks, the risk of liquid penetration can be reduced by more than 90%. When splashing or spraying water enters the louver at a small angle, it is directly sprayed onto the second folding blade 204. Subsequently, it can be reflected multiple times by the folding blade, and each time it is reflected, some of the splashing or spraying water will flow out of the louver along the surface of the folding blade. By the same principle, the four-fold blades 2 can also block dust brought by sandstorms. The fixed four-fold blades 2 do not require additional angle adjustment during structural use, which facilitates the later maintenance of the four-fold louver ventilation and protection structure of this embodiment. The assembly is convenient and conducive to large-scale promotion in the industry.

[0034] It should be noted that the spacing between adjacent four-fold blades 2 can be set according to the air inlet and outlet area of ​​the vent 4, and no specific restrictions are imposed here.

[0035] Specifically, the values ​​of R1, R2, R3, R4, and R5 can all be 90°, 95°, 100°, 105°, 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, 165°, 170°, 175°, 180°, etc., and the value of R5 can all be 60°, 65°, 70°, 75°, 80°, 85°, 90°, etc. Preferably, the fourth hook piece 209 is arranged in the horizontal direction.

[0036] In a specific example that can be implemented, 120°≤R1≤180°, 90°≤R2≤120°, 120°≤R3≤180°, 120°≤R4≤180°, 90°≤R5≤120°, and 60°≤R6≤90°.

[0037] like Figures 3 to 4 As shown, in a specific preferred example that can be implemented, R1=155°, R2=115°, R3=120°, R4=150°, R5=98.5°, and R6=60°.

[0038] In one feasible example, the four-fold blade 2 is a one-piece molded structure. The one-piece molded four-fold blade 2 eliminates the weak points connecting adjacent turning blades and hooks, significantly enhancing the overall strength and rigidity of the blade. This allows it to better withstand wind loads, reduce the risk of deformation and damage, and extend the service life of the four-fold blade 2. Simultaneously, it reduces the number of parts and connection points, making installation simpler and faster, lowering installation difficulty and time costs, and avoiding potential errors and problems during installation. It should be noted that the material of the four-fold blade 2 can be selected according to actual conditions and is not specifically limited here. In this embodiment, the four-fold blade 2 is preferably made of aluminum, which has good strength and rigidity.

[0039] like Figure 2 As shown, in a specific implementable example, the four-fold louvered ventilation and protection structure also includes a filter layer 3. The filter layer 3 is vertically arranged on the side of the louver fixing frame 1 near the ventilation opening 4. In the horizontal direction, the filter layer 3 is spaced at a preset distance from the four-fold blades 2 and the ventilation opening 4, that is, a preset ventilation distance is maintained between the inner surface 301 of the filter layer and the inner surface 106 of the louver fixing frame, and a preset ventilation distance is maintained between the outer surface 302 of the filter layer and the four-fold blades 2.

[0040] Water splashes or sprays in the horizontal or inclined direction can enter the louvers from the outside and then fall out of the louvers along the inclined or turning direction of the four-fold blades 2. When some splashes, sprays, and water vapor enter the inside of the louvers, the filter cotton layer 3 will block the splashes, sprays, and water vapor from entering the equipment cabinet.

[0041] Specifically, the filter layer 3 includes a support and filter cotton. The support is fixed within the louvered frame 1, and the filter cotton is fixed to the support. Preferably, the support also includes a filter screen, and the filter cotton can be directly fixed to the side of the filter screen away from the vent 4. The filter screen supports the filter cotton. To avoid affecting ventilation and reduce wind resistance, a filter screen with a pore size of 3mm or larger is preferred to resist the impact of fine water particles and dust on the filter cotton, prevent the filter cotton from deforming, and improve the reliability of dustproof and waterproof performance. In this embodiment, the filter cotton is preferably G3 grade to further ensure the waterproof and dustproof effect.

[0042] To further illustrate the principle behind this structure's ability to prevent water jets and dust, in Figure 2 When splashing or spraying water enters the louvers at a large angle (from bottom to top), it is directly sprayed onto the third hook blade 207 and splashed back onto the surface of the filter cotton layer 3. The water splashing and spraying flow areas are mainly concentrated in the Z1 and Z2 areas. When splashing or spraying water enters the louvers at a smaller angle, the water splashing and spraying flow areas are mainly concentrated in the Z3 area. The water splashing and spraying water is directly sprayed onto the second turning blade 204. Some of the splashing and spraying water is directly reflected onto the vertical blade 202 of the upper four-fold blade 2 and reflected a second time. It is reflected onto the fourth turning blade 208 of the original lower four-fold blade 2 and reflected a third time. It is reflected onto the second turning blade 204 of the upper four-fold blade 2 and reflected a fourth time onto the outer surface 302 of the filter cotton layer. Each time the splashing and spraying water undergoes a reflection, some of it flows out of the louvers along the surface of the turning blade, thus achieving a waterproof effect. Similarly, when dust enters the louvers with the airflow (wind), it also flows out of the louvers through multiple reflections.

[0043] To facilitate the fixing of the four-fold blades 2 to the louver fixing frame 1, such as Figure 1 As shown, in a specific example that can be implemented, the accommodating space enclosed by the upper fixed frame 101, the left fixed frame 102, the lower fixed frame 103, and the right fixed frame 104 of the louver fixing frame 1 is used to place the four-fold blade 2, and the two ends of the four-fold blade 2 along the horizontal direction are fixedly set on the left fixed frame 102 and the right fixed frame 104.

[0044] Furthermore, such as Figure 5As shown, the left fixed frame 102 has a left fixed frame first fixing hole 1021 and a left fixed frame second fixing hole 1022 arranged in a vertical array along the direction, with the left fixed frame first fixing hole 1021 being higher than the left fixed frame second fixing hole 1022 in the vertical direction; the right fixed frame 104 has a right fixed frame first fixing hole 1041 and a right fixed frame second fixing hole 1042 arranged in a vertical array along the direction, with the right fixed frame first fixing hole 1041 being higher than the right fixed frame second fixing hole 1042 in the vertical direction; the connecting structure fixes the two ends of the four-fold blade 2 to the left fixed frame 102 and the right fixed frame 104 respectively through the blade first fixing hole 210, the left fixed frame first fixing hole 1021, the right fixed frame first fixing hole 1041, the blade second fixing hole 211, the left fixed frame second fixing hole 1022, and the right fixed frame second fixing hole 1042.

[0045] It should be noted that the connection structure in this implementation can be a rivet structure or other structures, as long as it can play a fixing role. No specific restrictions are imposed here, and it can be set according to actual needs.

[0046] Under severe weather conditions, rainwater can slowly seep through the gaps in the fixing holes on the left fixed frame 102 and the right fixed frame 104, or form continuous raindrops that directly enter the four-fold louvered ventilation and protection structure. To prevent water from entering the fixing holes, in one feasible example, vertical mounting grooves are provided on the inner sides of the left fixed frame 102 and the right fixed frame 104. The mounting grooves are used to place mounting brackets, and fixing holes are provided on the mounting brackets. The four-fold blades 2 are fixed to the mounting brackets through these fixing holes and then installed in the mounting grooves through the mounting brackets, thus preventing the fixing holes from being exposed to the outdoor environment.

[0047] like Figures 1 to 2 As shown, in one feasible example, an upper louver cover 105 is provided on the upper fixed frame 101 of the louver fixing frame 1. The upper louver cover 105 includes a cover 1051 and a hook plate 1052. One end of the cover 1051 is fixed to the upper fixed frame 101, and the other end is fixedly connected to the hook plate 1052. The hook plate 1052 faces the side closest to the four-fold blade 2. The provision of the upper louver cover 105 is equivalent to adding a "lateral tie" to the top of the four-fold blade 2, which can effectively counteract the upward warping or lateral displacement tendency of the four-fold blade 2 caused by its own weight, vibration, or external force (such as wind), avoiding the risk of gaps or loosening between the four-fold blade 2 and the louver fixing frame 1. At the same time, the hook plate 1052 further fills the local gaps at the top of the four-fold blade 2, preventing rainwater from seeping into the interior along the thickness direction of the four-fold blade 2. In a preferred example, the upper louver cover 105 is an integral sheet metal structure.

[0048] To facilitate the outflow of liquids entering the four-fold louvered ventilation and protection structure, such as Figure 1 and Figure 6 As shown, in one feasible example, the lower fixed frame 103 is provided with drainage holes, which are evenly arranged horizontally. The shape of the drainage holes can be one or a combination of two or more of the following: circular, square, rectangular, elliptical, oblong, polygonal, and irregular. Preferably, the drainage holes are evenly arranged horizontally. The shape of the drainage holes can be set according to the actual situation and is not specifically limited here. The number of drainage holes can be appropriately adjusted according to the width of the lower fixed frame 103 and is not specifically limited here.

[0049] Furthermore, such as Figure 2 and Figure 6 As shown, the lower fixed frame 103 has an upwardly extending baffle 1033 at its front end. The lower fixed frame 103 has a circular first drain hole 1031 and an oblong second drain hole 1032. The first drain hole 1031 is close to the baffle 1033, and the second drain hole 1032 is away from the baffle 1033. The circular first drain hole 1031 is evenly stressed and has no stress concentration, making it less prone to deformation and blockage due to liquid impact or impurity accumulation. It is suitable for handling high-frequency, low-flow liquid discharge. The oblong second drain hole 1032 has a larger drainage area for the same perimeter (approximately 30% more drainage capacity than a circular hole of the same width), and its long axis can be aligned with the liquid flow direction, accelerating high-flow drainage. The baffle 1033 is designed to prevent splashing and spraying water from entering from below the four-fold louvered ventilation and protection structure, and also facilitates the collection of liquid within the louvered fixed frame 1 to flow out through the drain hole.

[0050] In a preferred embodiment, the lower fixing frame 103 is inclined downward along the outside so that liquid within the four-fold louvered ventilation and protection structure drips down the inclined lower fixing frame 103 from the drain hole.

[0051] In summary, the embodiments of this utility model provide a four-fold louvered ventilation and protection structure, which includes: a louver fixing frame 1 and four-fold blades 2; the louver fixing frame 1 is disposed at the ventilation opening 4 of the equipment cabinet; multiple four-fold blades 2 are evenly fixed at the left and right ends of the louver fixing frame 1 in the vertical direction, forming a louver; the four-fold blades 2 include a first hook 201, a vertical blade 202, a first turning blade 203, a second turning blade 204, a second hook 205, a third turning blade 206, a third hook 207, a fourth turning blade 208, and a fourth hook 209 connected in sequence, and a first fixing hole 210 for the blades below the overlap of the first turning blade 203 and the second turning blade 204, and a lower fixing hole 210 for the blades below the overlap of the third hook 207 and the third turning blade 206. The blade is provided with a second fixing hole 211; the included angle between the first hook 201 and the vertical blade 202 is R1, and 90°≤R1≤180°; the included angle between the first turning blade 203 and the vertical direction is R2, and 90°≤R2≤180°; the second turning blade 204 is parallel to the vertical blade 202; the second hook 205 and the third turning blade 206 are collinear; the included angle between the third turning blade 206 and the second turning blade 204 is R3, and 90°≤R3≤180°; the included angle between the third turning blade 206 and the fourth turning blade 208 is R4, and 90°≤R4≤180°; the included angle between the third hook 207 and the fourth turning blade 208 is R5, and 90°≤R5≤180°; the included angle between the fourth turning blade 208 and the fourth hook 209 is R6, and R6≤90°. In this embodiment, the four-fold blades are evenly spaced vertically, with adjacent blades mutually shielding each other to form a stepped water barrier. When splashing or spraying water enters horizontally or at a large angle, the water flows out horizontally due to the guiding effect of the folding blades. Combined with the secondary constraint of the water flow trajectory by the four hooks, the risk of liquid penetration can be reduced by more than 90%. When splashing or spraying water enters the louver at a small angle, it is directly sprayed onto the second folding blade 204. Subsequently, it can be reflected multiple times by the folding blade, with some splashing or spraying water flowing out of the louver along the surface of the folding blade after each reflection. Similarly, the four-fold blades can also block dust brought by sandstorms. The fixed four-fold blades do not require angle adjustment during structural use, facilitating the later maintenance of the four-fold louver ventilation and protection structure of this embodiment. Assembly is convenient, which is conducive to large-scale promotion in the industry. Therefore, this utility model effectively overcomes a certain shortcoming of the prior art and has high industrial application value.

[0052] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A four-fold louvered ventilation and protection structure, characterized in that, The four-fold louvered ventilation and protection structure includes: A louvered fixing frame (1) is installed at the ventilation opening (4) of the equipment cabinet; Four-fold blades (2), multiple four-fold blades (2) are fixed at even intervals along the vertical direction at the left and right ends of the louver fixing frame (1); The four-fold blade (2) includes a first hook blade (201), a vertical blade (202), a first turning blade (203), a second turning blade (204), a second hook blade (205), a third turning blade (206), a third hook blade (207), a fourth turning blade (208), and a fourth hook blade (209) connected in sequence, as well as a first blade fixing hole (210) provided below the overlap of the first turning blade (203) and the second turning blade (204), and a second blade fixing hole (211) provided below the overlap of the third hook blade (207) and the third turning blade (206); The angle between the first hook blade (201) and the vertical blade (202) is R1, and 90°≤R1≤180°; the angle between the first turning blade (203) and the vertical direction is R2, and 90°≤R2≤180°; the second turning blade (204) is parallel to the vertical blade (202); the second hook blade (205) and the third turning blade (206) are collinear; the third turning blade (206) and the second turning blade (204) are parallel to each other. The included angle between the third turning blade (204) and the fourth turning blade (208) is R3, and 90°≤R3≤180°; the included angle between the third turning blade (206) and the fourth turning blade (208) is R4, and 90°≤R4≤180°; the included angle between the third hook blade (207) and the fourth turning blade (208) is R5, and 90°≤R5≤180°; the included angle between the fourth turning blade (208) and the fourth hook blade (209) is R6, and R6≤90°.

2. The four-fold louvered ventilation and protection structure according to claim 1, characterized in that, 120°≤R1≤180°, 90°≤R2≤120°, 120°≤R3≤180°, 120°≤R4≤180°, 90°≤R5≤120°, 60°≤R6≤90°.

3. The four-fold louvered ventilation and protection structure according to claim 2, characterized in that, R1=155°, R2=115°, R3=120°, R4=150°, R5=98.5°, R6=60°.

4. The four-fold louvered ventilation and protection structure according to claim 1, characterized in that, The four-fold blade (2) is a one-piece molded structure.

5. The four-fold louvered ventilation and protection structure according to claim 1, characterized in that, The four-fold louvered ventilation and protection structure also includes a filter cotton layer (3), which is vertically arranged on the side of the louver fixing frame (1) near the ventilation opening (4). The filter cotton layer (3) is spaced at a preset distance from the four-fold blades (2) and the ventilation opening (4).

6. The four-fold louvered ventilation and protection structure according to claim 1, characterized in that, The space enclosed by the upper fixed frame (101), left fixed frame (102), lower fixed frame (103) and right fixed frame (104) of the louver fixing frame (1) is used to place the four-fold blade (2). The two ends of the four-fold blade (2) along the horizontal direction are fixedly set on the left fixed frame (102) and the right fixed frame (104).

7. The four-fold louvered ventilation and protection structure according to claim 6, characterized in that, The left fixing frame (102) is vertically arranged with a first fixing hole (1021) and a second fixing hole (1022), the first fixing hole (1021) being higher than the second fixing hole (1022) in the vertical direction; the right fixing frame (104) is vertically arranged with a first fixing hole (1041) and a second fixing hole (1042), the first fixing hole (1041) being higher than the second fixing hole (1022) in the vertical direction. The vertical direction is higher than the second fixing hole (1042) of the right fixing frame; the connecting structure fixes the two ends of the four-fold blade (2) to the left fixing frame (102) and the right fixing frame (104) respectively through the first fixing hole (210) of the blade, the first fixing hole (1021) of the left fixing frame, the first fixing hole (1041) of the right fixing frame, the second fixing hole (211) of the blade, the second fixing hole (1022) of the left fixing frame, and the second fixing hole (1042) of the right fixing frame.

8. The four-fold louvered ventilation and protection structure according to claim 6, characterized in that, The upper fixed frame (101) of the louver fixing frame (1) is provided with a louver upper cover plate (105). The louver upper cover plate (105) includes a cover plate (1051) and a hook plate (1052). One end of the cover plate (1051) is fixed to the upper fixed frame (101), and the other end is fixedly connected to the hook plate (1052). The hook plate (1052) faces the side close to the four-fold blade (2).

9. The four-fold louvered ventilation and protection structure according to claim 6, characterized in that: The lower fixed frame (103) is provided with a drain hole, and the shape of the drain hole is one or a combination of two or more of the following: circle, square, rectangle, ellipse, oblong, polygon, and irregular shape.

10. The four-fold louvered ventilation and protection structure according to claim 9, characterized in that: The lower fixed frame (103) has an upwardly extending baffle (1033) at its front end. The lower fixed frame (103) has a circular first drain hole (1031) and an oblong second drain hole (1032). The first drain hole (1031) is close to the baffle (1033), and the second drain hole (1032) is far away from the baffle (1033).

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