A heat dissipation structure of a protection box

Abstract

This application belongs to the field of protective box technology and discloses a heat dissipation structure for a protective box, including a box body with an exhaust port and an air inlet on opposite sides. A fan is installed inside the exhaust port, and two filter plates are also installed inside the box body. A mounting frame is provided between the air inlet and the adjacent filter plate. A fixing plate with a central opening is provided on one side of the mounting frame. An upper rotating roller and a lower rotating roller are rotatably mounted on the upper and lower sides of the opening inside the mounting frame, respectively. A driving component is provided on the fixing plate. A filter screen is wound on the lower rotating roller, and one side of the filter screen is connected to the upper rotating roller. The driving component drives the upper rotating roller to rotate, pulling the filter screen wound on the lower rotating roller, causing the filter screen with dust to be wound onto the upper rotating roller, while releasing the unused clean filter screen from the lower rotating roller to the opening of the fixing plate. This automatically maintains the cleanliness of the screen at the opening, ensuring that the air intake channel is always unobstructed and avoiding a decrease in heat dissipation efficiency due to filter clogging.

Description

Technical Field

[0001] This utility model relates to the field of protective box technology, and in particular to a heat dissipation structure for a protective box. Background Technology

[0002] In numerous fields such as industrial production, data communication, power transmission, and outdoor operations, the stable operation of various core equipment (such as servers, precision instruments, electrical components, and control modules) directly determines the reliability and safety of the entire system. Within the equipment operating system, core equipment is typically fixedly installed inside a protective enclosure, which provides a stable operating environment. However, the equipment continuously generates heat during operation. If this heat cannot be dissipated in time, the temperature inside the enclosure will rise, affecting equipment performance and potentially causing malfunctions. Therefore, a heat dissipation structure is an indispensable and crucial component of the protective enclosure design.

[0003] Currently, the heat dissipation structure design of protective enclosures on the market is relatively simple, mostly consisting of a combination of cooling fans and filter plates. Cooling fans accelerate airflow inside and outside the enclosure through active exhaust or supply air, achieving heat exchange; filter plates are installed at the air inlet to prevent dust and impurities from the outside air from entering the enclosure. However, over long-term use, dust gradually accumulates and adheres to the surface of the filter plate. If the filter plate is not cleaned in time, it will significantly increase the airflow resistance at the air inlet, and the airflow intensity entering the enclosure will be significantly weakened. When the airflow cannot meet the heat dissipation requirements, the cooling efficiency of the cooling fan will drop sharply. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a heat dissipation structure for a protective enclosure.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a heat dissipation structure for a protective box, comprising a box, an exhaust port and an air inlet respectively opened on opposite sides of the box, a fan disposed in the exhaust port, two filter plates disposed in the box, an installation frame disposed between the air inlet and the adjacent filter plate, a fixing plate with a central opening disposed on the side of the installation frame adjacent to the filter plate, an upper rotating roller and a lower rotating roller respectively rotatably disposed on the upper and lower sides of the opening in the installation frame, a driving component for driving the upper rotating roller to rotate disposed on the fixing plate, a filter mesh wound on the lower rotating roller, and one side of the filter mesh connected to the upper rotating roller.

[0006] By adopting the above technical solution, a housing, fan, and mounting frame are installed. When the fan operates, it actively draws hot air from inside the housing and exhausts it through the exhaust port. Simultaneously, a negative pressure is created inside the housing, automatically drawing in cool outside air through the air inlet. Compared to natural heat dissipation, this significantly accelerates the heat exchange rate within the housing, providing stable heat dissipation for the internal equipment. When outside air enters, it is filtered by a screen to intercept dust and impurities, preventing dust from entering the housing and adhering to the surfaces of the internal equipment. After a period of use, dust adhering to the surface of the screen can clog the mesh, leading to increased airflow resistance and reduced airflow, thus affecting heat dissipation. At this point, activating the drive assembly rotates the upper rotating roller, pulling the screen wound on the lower rotating roller to rewind the dusty screen to the upper rotating roller, while simultaneously releasing unused clean screens from the lower rotating roller to the opening of the fixing plate. This eliminates the need for frequent manual disassembly and replacement of the screens, automatically maintaining the cleanliness of the screens at the opening, ensuring the air intake channel remains unobstructed, and preventing a decrease in heat dissipation efficiency due to screen clogging.

[0007] Furthermore, an outlet is provided on one side of the housing corresponding to the mounting frame. The space between the housing side wall with the air inlet and the adjacent filter plate is matched with the outlet to form a cavity with one side open. The mounting frame and the cavity are slidably fitted together.

[0008] By adopting the above technical solution, the open cavity allows the mounting frame to be pulled directly from the outlet along the cavity. When the filter screen needs to be cleaned, there is no need to disassemble the side wall of the box; simply pull out the mounting frame to clean the filter screen, which greatly reduces the complexity of operation and maintenance time.

[0009] Furthermore, a retaining plate is rotatably mounted on the side of the container next to the outlet, and an L-shaped plate is mounted on the mounting frame, the L-shaped plate engaging with the retaining plate.

[0010] By adopting the above technical solution, the snap-fit ​​between the card plate and the L-shaped plate can lock the mounting frame inside the cavity.

[0011] Furthermore, the fixing plate has four horizontally arranged crossbars in a rectangular array below the opening. A sliding seat is slidably mounted on two vertically adjacent crossbars. The lower rotating roller is rotatably mounted between the two sliding seats. A retaining ring is provided on the side of the crossbar away from the fixing plate. A compression spring is sleeved on the crossbar between the retaining ring and the sliding seat. A limiting roller is rotatably mounted on the mounting frame between the opening and the upper rotating roller. The limiting roller is arranged close to the fixing plate. The filter screen passes through the space between the limiting roller and the fixing plate.

[0012] By adopting the above technical solution, a sliding seat, a retaining ring, and a compression spring are set up. The compression spring provides a thrust to the mounting seat and the lower rotating roller in the direction of the fixed plate, so that the filter screen roll on the lower rotating roller contacts the fixed plate. This avoids the screen from being loose and not making tight contact with the opening of the fixed plate, ensuring that air must pass through the screen to enter the opening and improving the filtration accuracy.

[0013] Furthermore, the mounting frame has horizontally arranged strip holes on one side of the L-shaped plate, and a connecting shaft is concentrically arranged at the end of the lower rotating roller. The connecting shaft passes through the strip holes and has a rotating handle.

[0014] By adopting the above technical solution, when cleaning the filter screen after removing the mounting frame, rotating the handle drives the connecting shaft and the lower rotating roller to rotate, pulling the filter screen on the upper rotating roller, so that the dusty filter screen gradually unfolds. At this time, the dust attached to the surface of the filter screen can be cleaned with a vacuum cleaner without additional disassembly, improving the convenience and efficiency of the cleaning operation.

[0015] Furthermore, the drive assembly includes mounting seats spaced apart on the fixed plate, with a rotating shaft horizontally rotatably mounted on each of the two mounting seats. A drive wheel is fixedly mounted on the rotating shaft, and a driven wheel is fixedly mounted on the upper rotating roller. The driven wheel meshes with the drive wheel. A drive motor is mounted on the fixed plate, and the output shaft of the drive motor is connected to the end of the rotating shaft.

[0016] By adopting the above technical solution, the drive motor drives the rotating shaft and the driving wheel to rotate, thereby driving the driven wheel and the upper rotating roller to rotate.

[0017] Furthermore, two driving wheels are fixedly sleeved on the rotating shaft, and two driven wheels are fixedly sleeved on the upper rotating roller, with the driven wheels meshing with the corresponding driving wheels.

[0018] By adopting the above technical solutions, the stability of the transmission is improved.

[0019] Furthermore, the opening is vertically provided with several horizontally spaced limiting rods.

[0020] By adopting the above technical solution, the limiting rod can support the filter screen covering the opening, preventing the screen from being excessively dented or deformed under the impact of airflow, ensuring that the filter screen always remains flat, maintaining a stable filtration area, and avoiding the dust interception effect being affected by the deformation of the filter screen.

[0021] Furthermore, the upper rotating roller is parallel to the lower rotating roller.

[0022] Furthermore, the width of the filter mesh is greater than the width of the opening.

[0023] In summary, this utility model has the following beneficial effects: This application includes a housing, a fan, and a mounting frame. When the fan operates, it actively draws hot air from inside the housing and discharges it through the exhaust port, simultaneously creating negative pressure inside the housing. Low-temperature outside air is automatically drawn in and enters through the air inlet. Compared to natural heat dissipation, this significantly accelerates the heat exchange rate inside the housing, providing stable heat dissipation for the internal equipment. When outside air enters, it is filtered by a screen to intercept dust and impurities, preventing dust from entering the housing and adhering to the surface of the internal equipment. After a period of use, dust adhering to the surface of the screen will clog the mesh, increasing airflow resistance and weakening airflow, thus affecting heat dissipation. At this time, activating the drive assembly drives the upper rotating roller to rotate, pulling the screen wound on the lower rotating roller. This winds the dust-covered screen onto the upper rotating roller, while simultaneously releasing the unused clean screen from the lower rotating roller to the opening of the fixing plate. This eliminates the need for frequent manual disassembly and replacement of the screen, automatically maintaining the cleanliness of the screen at the opening, ensuring the air intake channel remains unobstructed, and preventing a decrease in heat dissipation efficiency due to screen clogging. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present utility model; Figure 3 This is a schematic diagram of the overall structure from another angle of an embodiment of the present utility model; Figure 4 This is a schematic diagram of the installation frame and filter screen in an embodiment of this utility model; Figure 5 This is a schematic diagram of the installation frame in an embodiment of the present invention; Figure 6 yes Figure 5 Enlarged view of part A; Figure 7 yes Figure 5 Enlarged view of part B; Figure 8 yes Figure 5 Enlarged view of part C.

[0025] In the diagram: 10. Housing; 11. Exhaust port; 12. Air inlet; 13. Fan; 14. Filter screen; 15. Outlet; 16. Clamping plate; 20. Mounting frame; 21. Fixing plate; 22. Opening; 221. Limiting rod; 23. Upper rotating roller; 24. Lower rotating roller; 25. Filter screen; 26. L-shaped plate; 27. Limiting roller; 28. Strip hole; 29. ​​Connecting shaft; 291. Rotating handle; 30. Drive assembly; 31. Mounting base; 32. Rotating shaft; 33. Drive wheel; 34. Driven wheel; 35. Drive motor; 40. Crossbar; 41. Sliding seat; 42. Retaining ring; 43. Compression spring. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] like Figure 1-8 As shown in the illustration, this application discloses a heat dissipation structure for a protective enclosure, including an enclosure 10, a fan 13, and a drive assembly 30. The enclosure 10 has an exhaust port 11 and an air inlet 12 on opposite sides. The fan 13 is located inside the exhaust port 11. When the fan 13 operates, it actively draws in hot air from inside the enclosure 10 and discharges it through the exhaust port 11. Simultaneously, a negative pressure is created inside the enclosure 10, automatically drawing in cool outside air through the air inlet 12. Compared to natural heat dissipation, this significantly accelerates the heat exchange rate inside the enclosure 10, providing stable heat dissipation for the equipment inside the enclosure 10. An installation frame 20 is provided between the air inlet 12 and the adjacent filter plate 14. A fixing plate 21 with a central opening 22 is provided on one side of the installation frame 20 adjacent to the filter plate 14. An upper rotating roller 23 and a lower rotating roller 24 are rotatably mounted on the upper and lower sides of the opening 22 within the installation frame 20, respectively. A drive assembly 30 is mounted on the fixing plate 21 and is used to drive the upper rotating roller 23 to rotate. A filter screen 25 is wound around the lower rotating roller 24, with one side of the filter screen 25 connected to the lower rotating roller 24 and the other side connected to the upper rotating roller 23. When outside air enters, dust and impurities are intercepted by the filter screen 25, preventing dust from entering the housing 10 and adhering to the surface of the internal equipment. After a period of use, dust adhering to the surface of the filter screen 25 will clog the mesh, leading to increased air intake resistance, weakened airflow, and consequently affecting heat dissipation. At this time, activating the drive assembly 30 drives the upper rotating roller 23 to rotate, pulling the filter screen 25 wound on the lower rotating roller 24. This causes the dust-covered filter screen 25 to be wound onto the upper rotating roller 23, while simultaneously releasing the unused, clean filter screen 25 from the lower rotating roller 24 into the opening 22 of the fixing plate 21. This automatically maintains the cleanliness of the screen at the opening 22 without the need for frequent manual disassembly and replacement of the filter screen 25, ensuring the air intake channel remains unobstructed and preventing a decrease in heat dissipation efficiency due to filter clogging.

[0028] Specifically, the width of the filter mesh 25 is greater than the width of the opening 22, ensuring that the filter mesh 25 can completely cover the opening 22. Several horizontally spaced limiting rods 221 are vertically arranged inside the opening 22. The limiting rods 221 support the filter mesh 25 covering the opening 22, preventing excessive denting or deformation of the mesh under airflow impact, ensuring the filter mesh 25 remains flat and maintains a stable filtration area, preventing deformation of the filter mesh 25 from affecting dust interception. The filter plate 14 near the air inlet 12 can perform secondary filtration of residual dust that is not completely intercepted by the filter mesh 25, preventing dust from entering the housing 10. The filter plate 14 near the air outlet further filters the trace amounts of dust that have entered the housing 10 but were not intercepted by the filter mesh 25 and the previous filter plate 14, effectively preventing dust from adhering to the surface of the fan 13 with the airflow. The filter screen 25 can effectively intercept most of the dust in the air, and only a small amount of dust can penetrate the filter screen 25. Therefore, a large amount of dust will not adhere to the surface of the two filter screens 14. During maintenance, you can directly clean the filter screens 14 by simply opening the door of the housing 10.

[0029] During setup, an outlet 15 is provided on one side of the housing 10 corresponding to the mounting frame 20. The space between the side wall of the housing 10 with the air inlet 12 and the adjacent filter screen 14, in conjunction with the outlet 15, forms a cavity with one side open. The mounting frame 20 slides into the cavity. This open cavity allows the mounting frame 20 to be pulled directly from the outlet 15 along the cavity. When the filter screen 25 needs cleaning, there is no need to disassemble the side wall of the housing 10; simply pull out the mounting frame 20 to clean the filter screen 25, significantly reducing operational complexity and maintenance time. A retaining plate 16 is rotatably mounted on the side of the housing 10 next to the outlet 15. An L-shaped plate 26 is mounted on the mounting frame 20, and the L-shaped plate 26 engages with the retaining plate 16. This engagement locks the mounting frame 20 within the cavity. The card plate 16 adopts a rotating design. To unlock, simply rotate the card plate 16 to disengage it from the L-shaped plate 26 to pull out the mounting frame 20. To lock, simply rotate the card plate 16 to complete the fixation. No additional tools are required. While ensuring structural stability, it does not affect the disassembly efficiency during maintenance, thus balancing stability and convenience.

[0030] In the specific setup, four horizontal bars 40 arranged in a rectangular array are horizontally positioned on the lower side of the opening 22 on the fixed plate 21. A sliding seat 41 is slidably mounted on two adjacent vertical horizontal bars 40. The lower rotating roller 24 is rotatably mounted between the two sliding seats 41. A retaining ring 42 is provided on the side of the horizontal bar 40 away from the fixed plate 21. A compression spring 43 is sleeved on the rod body of the horizontal bar 40 between the retaining ring 42 and the sliding seat 41. The compression spring 43 provides a thrust to the mounting base 31 and the lower rotating roller 24 in the direction of the fixed plate 21, so that the filter screen 25 roll on the lower rotating roller 24 contacts the fixed plate 21, preventing the screen from loosening and causing poor contact with the opening 22 of the fixed plate 21, ensuring that air must pass through the screen to enter the opening 22, and improving the filtration accuracy. The mounting frame 20 is located between the opening 22 and the upper rotating roller 23, and a limiting roller 27 is rotatably provided. The limiting roller 27 is arranged near the fixed plate 21. The filter screen 25 passes between the limiting roller 27 and the fixed plate 21, which guides the filter screen 25, further enhancing the fit between the screen and the opening 22 and reducing swaying and deviation during pulling.

[0031] The mounting frame 20 has horizontally arranged strip-shaped holes 28 on one side of the L-shaped plate 26. A connecting shaft 29 is concentrically mounted at the end of the lower rotating roller 24. The connecting shaft 29 passes through the strip-shaped holes 28 and has a rotating handle 291. When the mounting frame 20 is removed to clean the filter screen 25, rotating the rotating handle 291 drives the connecting shaft 29 and the lower rotating roller 24 to rotate, pulling the filter screen 25 on the upper rotating roller 23 and gradually unfolding the dusty filter screen 25. At this time, a vacuum cleaner can be used to clean the dust attached to the surface of the filter screen 25 without additional disassembly, improving the convenience and efficiency of the cleaning operation. At the same time, the strip-shaped holes 28 provide horizontal movement space for the connecting shaft 29, which can match the sliding requirements of the sliding seat 41. This ensures that when the lower rotating roller 24 moves with the sliding seat 41, the connecting shaft 29 can slide smoothly and synchronously along the strip-shaped holes 28 without affecting the contact between the filter screen 25 and the fixing plate 21.

[0032] The drive assembly 30 includes mounting seats 31 spaced apart on the fixed plate 21. A rotating shaft 32 is horizontally rotatably mounted on each mounting seat 31. The rotating shaft 32, the limiting roller 27, the upper rotating roller 23, and the lower rotating roller 24 are all parallel to each other. A driving wheel 33 is fixedly sleeved on the rotating shaft 32, and a driven wheel 34 is fixedly sleeved on the upper rotating roller 23. The driven wheel 34 meshes with the driving wheel 33. A drive motor 35 is mounted on the fixed plate 21, and the output shaft of the drive motor 35 is connected to the end of the rotating shaft 32. The drive motor 35 drives the rotating shaft 32 and the driving wheel 33 to rotate, thereby driving the driven wheel 34 and the upper rotating roller 23 to rotate. Two driving wheels 33 are fixedly sleeved on the rotating shaft 32, and two driven wheels 34 are fixedly sleeved on the upper rotating roller 23. The driven wheels 34 mesh with their corresponding driving wheels 33, improving the stability of the transmission.

[0033] The housing 10 houses a controller for automated control of the drive motor 35. The two are connected via a pluggable cable consisting of two wires with matching plugs. Before removing the mounting frame 20, the plug must be disconnected to break the circuit connection between the controller and the drive motor 35, preventing the cable from obstructing the removal of the mounting frame 20. The controller operates the drive motor 35 in an intermittent mode, automatically starting it once at fixed time intervals set in a preset program to complete the quantitative replacement of the filter screen 25. The mounting frame 20 is periodically removed for cleaning, resulting in a lower cleaning frequency compared to other structures.

[0034] The working principle of the heat dissipation structure of the protective box 10 in this embodiment is as follows: During normal operation, the fan 13 inside the box 10 operates at the exhaust port 11, actively drawing in hot air from the box and discharging it from the exhaust port 11. At the same time, a negative pressure is formed inside the box 10, and the low-temperature air from the outside automatically enters from the air inlet 12, passes through the filter mesh 25 at the opening 22 of the fixing plate 21 inside the mounting frame 20, and then enters the inside of the box 10 to dissipate heat for the internal equipment.

[0035] The controller will automatically start the drive motor 35 at fixed time intervals set by the preset program, drive the output shaft to rotate the rotating shaft 32, the driving wheel 33, the driven wheel 34, and the upper rotating roller 23. When the upper rotating roller 23 rotates, it pulls the filter screen 25 wound on the lower rotating roller 24, and winds the old filter screen 25 with dust on its surface onto the upper rotating roller 23. At the same time, the lower rotating roller 24 releases the unused clean filter screen 25 to the opening 22 of the fixed plate 21, realizing the automatic replacement of the filter screen 25 without the need for frequent manual disassembly.

[0036] When cleaning the filter screen 25 is required, first rotate the retaining plate 16 next to the outlet 15 of the housing 10 to disengage the retaining plate 16 from the L-shaped plate 26 on the mounting frame 20, thereby releasing the lock on the mounting frame 20. Then, pull the mounting frame 20 out along the air inlet 12 (before pulling it out, disconnect the pluggable wire between the controller and the drive motor 35 to avoid the wire getting tangled). After pulling out the mounting frame 20, rotate the rotating handle 291 at the end of the lower rotating roller 24 that passes through the strip hole 28, thereby driving the connecting shaft 29 and the lower rotating roller 24 to rotate, pulling the filter screen 25 on the upper rotating roller 23, so that the dusty filter screen 25 gradually unfolds. At this time, the dust attached to the surface of the unfolded filter screen 25 can be cleaned with a vacuum cleaner without additional disassembly.

[0037] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A heat dissipation structure for a protective enclosure, characterized in that: The enclosure includes a housing (10), with an exhaust port (11) and an air inlet (12) on opposite sides. A fan (13) is installed inside the exhaust port (11). Two filter screens (14) are also installed inside the housing (10). An installation frame (20) is provided between the air inlet (12) and the adjacent filter screen (14). A fixing plate (21) with a central opening (22) is provided on the side of the installation frame (20) adjacent to the filter screen (14). An upper rotating roller (23) and a lower rotating roller (24) are rotatably arranged on the upper and lower sides of the opening (22) in the installation frame (20). A driving component (30) for driving the upper rotating roller (23) to rotate is provided on the fixing plate (21). A filter screen (25) is wound on the lower rotating roller (24). One side of the filter screen (25) is connected to the upper rotating roller (23).

2. The heat dissipation structure of a protective case according to claim 1, characterized in that: The box (10) has an outlet (15) on one side corresponding to the mounting frame (20). The side wall of the box (10) with the air inlet (12) and the adjacent filter plate (14) are spaced together to form an open cavity on one side. The mounting frame (20) slides with the cavity.

3. The heat dissipation structure of a protective case according to claim 2, characterized in that: The box (10) is rotatably provided with a card plate (16) next to the outlet (15), and an L-shaped plate (26) is provided on the mounting frame (20), and the L-shaped plate (26) is engaged with the card plate (16).

4. The heat dissipation structure of a protective case according to claim 1, characterized in that: The fixed plate (21) is horizontally arranged with four crossbars (40) arranged in a rectangular array below the opening (22). A sliding seat (41) is slidably arranged on two vertically adjacent crossbars (40). The lower rotating roller (24) is rotatably arranged between the two sliding seats (41). A retaining ring (42) is provided on the side of the crossbar (40) away from the fixed plate (21). A compression spring (43) is sleeved on the crossbar (40) between the retaining ring (42) and the sliding seat (41). A limiting roller (27) is rotatably arranged between the opening (22) and the upper rotating roller (23) of the mounting frame (20). The limiting roller (27) is arranged close to the fixed plate (21). The filter screen (25) passes through the space between the limiting roller (27) and the fixed plate (21).

5. The heat dissipation structure of a protective case according to claim 4, characterized in that: The mounting frame (20) has a horizontally arranged strip hole (28) on one side of the frame of the L-shaped plate (26). The lower rotating roller (24) has a connecting shaft (29) concentrically arranged at its end. The connecting shaft (29) passes through the strip hole (28) and has a rotating handle (291).

6. The heat dissipation structure of a protective case according to claim 1, characterized in that: The drive assembly (30) includes mounting seats (31) spaced apart on the fixed plate (21), with a rotating shaft (32) horizontally rotatably mounted on the two mounting seats (31). A drive wheel (33) is fixedly sleeved on the rotating shaft (32), and a driven wheel (34) is fixedly sleeved on the upper rotating roller (23). The driven wheel (34) meshes with the drive wheel (33). A drive motor (35) is mounted on the fixed plate (21), and the output shaft of the drive motor (35) is connected to the end of the rotating shaft (32).

7. The heat dissipation structure of the protective enclosure according to claim 6, characterized in that: Two drive wheels (33) are fixedly sleeved on the rotating shaft (32), and two driven wheels (34) are fixedly sleeved on the upper rotating roller (23). The driven wheels (34) mesh with the corresponding drive wheels (33).

8. The heat dissipation structure of a protective case according to claim 1, characterized in that: Several horizontally spaced limiting rods (221) are vertically arranged inside the opening (22).

9. The heat dissipation structure of a protective case according to claim 1, characterized in that: The upper rotating roller (23) is parallel to the lower rotating roller (24).

10. The heat dissipation structure of a protective case according to claim 1, characterized in that: The width of the filter mesh (25) is greater than the width of the opening (22).

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