Ventilating fan for building ventilation

Abstract

The application discloses a ventilation fan for building ventilation, which comprises a base, a main body, an air inlet, a controller, a ventilation fan and an opening and closing device. When the ventilation fan is used, the frame body is connected with the ventilation fan. When ventilation is performed, external air flows into the inner frame through the flow guide plate. The air is conducted to the flow-through opening through the opening and closing assembly and the processing assembly in the inner frame. The flowing air is introduced into the main body through the flow-through opening for purification treatment. The treated air flows into the room through the air inlet, so that the air flow is transported. When the weather is not good, such as winter or typhoon, the opening and closing assembly and the processing assembly are matched to play a blocking role, so that the external cold air or rainwater is effectively prevented from flowing into the room through the ventilation opening.

Description

Technical Field

[0001] This invention relates to the field of ventilation fan technology, and more specifically to a ventilation fan for building ventilation. Background Technology

[0002] Building ventilation fans can be used in buildings across various fields and industries. Their high air volume and long-distance air delivery make them a suitable and commonly used cooling device for buildings. They are used to quickly expel indoor heat, maintaining a temperature similar to the outside environment. A ventilation fan consists of fan blades and a motor. The fan structure drives airflow, thereby expelling hot air and achieving ventilation and heat dissipation. With continuous upgrades and optimizations, the performance of building ventilation fans has gradually improved, and their noise reduction capabilities have also been enhanced, allowing for low-noise operation. Areas for improvement when using ventilation fans include: When using a ventilation fan, it is normally installed in the building's ventilation area through its casing. When the fan is working, the motor drives the fan blades to rotate, thereby transporting airflow. The fan structure transports indoor hot air to the outside. The casing has a sound-absorbing layer that absorbs and reduces the noise when the fan is working. The mesh and filter cotton inside the casing can filter dust in the air while ventilating, providing a good dust prevention effect. When the ventilation fan is running, because it is always in the ventilation state, in winter or typhoons or other inclement weather, the vents cannot be closed, allowing cold air or rainwater from outside to flow directly into the room through the vents. The former will cause the temperature in the ventilated area to drop, while the latter will cause equipment, raw materials, or finished products stored in the ventilated area to get wet and be damaged, affecting the normal operation of work in the building. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention is achieved through the following technical solution: a ventilation fan for building ventilation, the structure of which includes a base, a main body, an air inlet, a controller, a ventilation fan, and an opening and closing device. The main body is mounted on the base, the controller is mounted on the main body, the air inlet and the ventilation fan are respectively located on the left and right sides of the main body, and the opening and closing device is mounted on the ventilation fan.

[0004] As a further optimization of the invention, the opening and closing device includes a buffer spring plate, a guide plate, a movable support rod, a flow port, an opening and closing component, a frame, a movable groove, a processing component, and an inner frame. The buffer spring plate is installed inside the inner frame, and the inner frame is installed in the middle position inside the movable groove. A movable support rod is provided between the inner frame and the movable groove. The movable groove is located inside the frame. A guide plate and a flow port are respectively provided at the upper and lower ends of the frame. The flow port is connected to the movable groove, and an opening and closing component is provided between them. The guide plate is connected to the inner frame. The processing component is located inside the inner frame and is connected to the opening and closing component. The frame is installed on a ventilation fan.

[0005] As a further optimization of the invention, the processing component includes a support component, a card holder, guide components, tie rods, and inserts. The support component is mounted on the card holder, and inserts are provided on both the left and right sides of the card holder. The guide components are mounted on the support component, and tie rods are connected to the guide components. The card holder is located inside the inner frame through the inserts and is connected to the opening and closing component.

[0006] As a further optimization of the invention, the support assembly includes a mounting frame, a stacking kit, a plug rod, a scaling adjustment component, a connecting rod, and a partition plate. A plug rod is inserted into the middle of the mounting frame, and the plug rod passes through the mounting frame and connects to the stacking kit. Multiple scaling adjustment components are connected to the stacking kit. The upper and lower ends of the scaling adjustment components are fitted with partition plates, and connecting rods are inserted into the ends of the scaling adjustment components. The mounting frame is mounted on the card holder, and the scaling adjustment components are connected to the guide components.

[0007] As a further optimization of the invention, the guide components include a docking plate, a flow guide, a swinging component, a connecting shaft, and a connecting spring plate. The docking plate consists of three parts, with a flow guide connecting the three docking plates. A connecting shaft is provided on both the left and right sides of each of the three docking plates. The connecting shaft is movably connected to the swinging component. The other end of the swinging component is connected to the connecting spring plate. The docking plate is connected to a scaling adjustment component. A pull rod is connected to the docking plate.

[0008] As a further optimization of the invention, the flow guide includes a movable extension, an insert plate, an interconnecting connector, a connecting seat, a linkage filter plate, and a connecting frame. The movable extension is connected to the insert plate, the insert plate is connected to the connecting seat, the connecting seat is provided with a linkage filter plate, the other end of the linkage filter plate is connected to the interconnecting connector, the other end of the interconnecting connector is connected to the movable extension, the interconnecting connector and the movable extension are provided on the connecting frame, the connecting frame is connected to the insert plate, and the connecting seat, the insert plate, and the docking plate are fitted together.

[0009] As a further optimization of the invention, the opening and closing assembly includes a rotating shaft, a telescopic rod, a connecting block, an elastic mesh plate, a connecting rod, and a pulling rod. The telescopic rod and the pulling rod are connected to the rotating shaft. The other ends of the two telescopic rods are respectively connected to two connecting blocks. An elastic mesh plate is provided between the two connecting blocks. A connecting rod is connected to the outer side of the connecting block. The connecting rod is movably connected to the pulling rod. The rotating shaft is connected to the counter-pull rod. The elastic mesh plate is connected between the flow port and the movable groove.

[0010] As a further optimization of the invention, the plurality of scaling components are isosceles trapezoidal structures of different sizes, which are connected by stacked kits to form a triangular structure.

[0011] As a further optimization of the invention, the two sides of the docking plate are connected to the swinging component to form a "︹" shaped structure.

[0012] As a further optimization of the invention, a connecting spring plate is connected to the end of the swing member. The two connecting spring plates connect the three swing members in series, and the two cooperate with each other to concentrate the flowing air onto the docking plate for conduction.

[0013] As a further optimization of the invention, the movable extension is connected to the linkage filter plate under the action of the interconnecting connector. When air enters the linkage filter plate, the air pressure will act on the interconnecting connector. After being subjected to force, the interconnecting connector will press down on the movable extension, and the movable extension will retract inward, thereby effectively expelling the air.

[0014] As a further optimization of the invention, an elastic mesh plate is connected between the two connecting blocks. The elastic mesh plate has a certain degree of elasticity and toughness, and the through holes inside it will expand and open as the elastic mesh plate moves. Beneficial effects

[0015] This invention discloses a ventilation fan for building ventilation, which has the following beneficial effects: This invention utilizes a combination of a buffer plate, a guide plate, a movable support rod, a flow port, an opening and closing component, a frame, a movable slot, a processing component, and an inner frame. The frame is connected to a ventilation fan. During ventilation, external air flows through the guide plate into the inner frame. The opening and closing component and the processing component inside the inner frame work together to divert and guide the air to the flow port. The flowing air is then introduced into the main body for purification. The purified air then flows into the room through the air inlet, thus transporting airflow. In winter or during typhoons or other inclement weather, the opening and closing component and the processing component work together to act as a barrier, effectively preventing cold air or rainwater from entering the room through the ventilation port.

[0016] This invention utilizes a combination of a support assembly, a card holder, guide components, a tie rod, and an insert block. A rotating stop is installed at the lower end of the card holder. During ventilation, the controller rotates the rotating stop clockwise, opening the vent at the lower end of the card holder. External air flows into the guide components, which extend and open upon impact. The support assembly restrains the guide components, preventing them from overextending and failing to return to their original position, allowing air to be effectively and stably dispersed and discharged from the guide components. Conversely, the controller rotates the rotating stop counter-clockwise to block the vent at the lower end of the card holder. Without the impact of wind, the guide components are compressed together, effectively working with the rotating stop to block external cold air or rain.

[0017] This invention utilizes a combination of a rotating shaft, a telescopic rod, connecting blocks, an elastic mesh plate, a connecting rod, and a pull rod. The rotating shaft is connected to the pull rod, which, under the action of the guide components, pushes the rotating shaft downwards. The rotating shaft moves inwards under this force, causing the telescopic rod and pull rod connected to its upper end to extend outwards. The two connecting blocks move outwards under the action of the telescopic rod and pull rod, and the elastic mesh plate between the two connecting blocks is pulled outwards, causing the through holes on the elastic mesh plate to expand and open, facilitating airflow. Conversely, the two connecting blocks move inwards under the action of the telescopic rod and pull rod, causing the elastic mesh plate to retract and its internal through holes to shrink, effectively obstructing airflow. Attached Figure Description

[0018] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a ventilation fan for building ventilation according to the present invention; Figure 2 This is a schematic diagram of the internal structure of the opening and closing device of the present invention.

[0019] Figure 3 This is a schematic diagram of the internal structure of the processing component of the present invention.

[0020] Figure 4 This is a cross-sectional structural diagram of the support component of the present invention.

[0021] Figure 5 This is a schematic diagram of the internal structure of the guide component of the present invention.

[0022] Figure 6 This is a cross-sectional structural diagram of the flow guide of the present invention.

[0023] Figure 7 This is a schematic diagram of the internal structure of the opening and closing component of the present invention.

[0024] In the diagram: Base 1, Main body 6, Air inlet 2, Controller 3, Ventilation fan 5, Opening and closing device 4, Buffer spring plate Q1, Guide plate E3, Moving support rod W2, Flow port T5, Opening and closing assembly R4, Frame U7, Movable groove Y6, Processing assembly I8, Inner frame P9, Support assembly R11, Card seat T12, Guide component I15, Tie rod Y13, Insert block U14, Mounting frame D21, Overlapping kit F23, Insert rod J2 5. Scaling adjustment component K26, connecting rod H24, partition plate G22, docking plate K31, flow guide component Z33, swing component C35, connecting shaft L32, connecting spring plate X34, movable extension component C41, insert plate B46, interconnecting connector N42, connecting seat Q45, linkage filter plate V43, connecting frame M44, rotating shaft E51, telescopic rod Y54, connecting block I56, elastic screen plate T52, connecting rod U55, traction rod R53. Implementation

[0025] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Example

[0026] Please see Figure 1 The present invention provides a technical solution: a ventilation fan for building ventilation, the structure of which includes a base 1, a main body 6, an air inlet 2, a controller 3, a ventilation fan 5, and an opening and closing device 4. The main body 6 is installed on the base 1, the controller 3 is provided on the main body 6, the air inlet 2 and the ventilation fan 5 are respectively provided on the left and right sides of the main body 6, and the opening and closing device 4 is installed on the ventilation fan 5.

[0027] Please see Figure 2 The opening and closing device 4 includes a buffer spring plate Q1, a guide plate E3, a movable support rod W2, a flow port T5, an opening and closing component R4, a frame U7, a movable groove Y6, a processing component I8, and an inner frame P9. The buffer spring plate Q1 is installed inside the inner frame P9. The inner frame P9 is installed in the middle position inside the movable groove Y6. A movable support rod W2 is provided between the inner frame P9 and the movable groove Y6. The movable groove Y6 is located inside the frame U7. The upper and lower ends of the frame U7 are respectively provided with a guide plate E3 and a flow port T5. The flow port T5 is connected to the movable groove Y6 and an opening and closing component R4 is provided between them. The guide plate E3 is connected to the inner frame P9. The processing component I8 is located inside the inner frame P9 and is connected to the opening and closing component R4. The frame U7 is installed on the ventilation fan 5.

[0028] The aforementioned buffer plate Q1 is used in conjunction with the inner frame P9. When air enters the inner frame P9, the airflow impact force will act on the buffer plate Q1, which effectively buffers the air and stably guides it into the inner frame P9.

[0029] Please see Figure 3 The processing component I8 includes a support component R11, a card holder T12, a guide component I15, a tie rod Y13, and an insert block U14. The support component R11 is mounted on the card holder T12. Insert blocks U14 are provided on both the left and right sides of the card holder T12. The guide component I15 is mounted on the support component R11. The tie rod Y13 is connected to the guide component I15. The card holder T12 is located inside the inner frame P9 through the insert block U14 and is connected to the opening and closing component R4.

[0030] Please see Figure 4 The support assembly R11 includes a mounting frame D21, a stacking kit F23, a plug rod J25, a scaling adjustment component K26, a connecting rod H24, and a partition plate G22. The plug rod J25 is inserted into the middle of the mounting frame D21 and passes through the mounting frame D21 to connect with the stacking kit F23. Multiple scaling adjustment components K26 are connected to the stacking kit F23. The upper and lower ends of the scaling adjustment component K26 are fitted with the partition plate G22. The end of the scaling adjustment component K26 is inserted with the connecting rod H24. The mounting frame D21 is mounted on the card holder T12, and the scaling adjustment component K26 is connected to the guide component I15.

[0031] Please see Figure 4 The multiple scaling adjustment pieces K26 are isosceles trapezoidal structures of different sizes, which are connected by the stacking kit F23 to form a triangular structure.

[0032] The aforementioned stacking kit F23 is used in conjunction with the scaling adjustment piece K26. Multiple scaling adjustment pieces K26 are arranged sequentially from smallest to largest on the stacking kit F23, allowing for vertical extension and retraction through the combination of the stacking kit F23 and the multiple scaling adjustment pieces K26.

[0033] Please see Figure 5 The guide component I15 includes a docking plate K31, a flow guide Z33, a swing component C35, a connecting shaft L32, and a connecting spring plate X34. There are three docking plates K31, and the flow guide Z33 connects the three docking plates K31. The three docking plates K31 are provided with connecting shafts L32 on both the left and right sides. The connecting shafts L32 are movably connected to the swing component C35. The other end of the swing component C35 is connected to the connecting spring plate X34. The docking plate K31 is connected to the scaling adjustment component K26. A pull rod Y13 is connected to the docking plate K31.

[0034] Please see Figure 5 The docking plate K31 is connected to the swinging component C35 on both sides to form a "︹" shaped structure.

[0035] Please see Figure 5The swing member C35 is connected to a connecting spring plate X34 at its end. The two connecting spring plates X34 connect the three swing members C35 together in series. The two cooperate with each other to concentrate the flowing air onto the docking plate K31 for conduction.

[0036] Please see Figure 6 The flow guide Z33 includes a movable extension C41, an insert plate B46, an interconnecting connector N42, a connecting seat Q45, a linkage filter plate V43, and a connecting frame M44. The movable extension C41 is connected to the insert plate B46, and the insert plate B46 is connected to the connecting seat Q45. The connecting seat Q45 is provided with the linkage filter plate V43, and the other end of the linkage filter plate V43 is connected to the interconnecting connector N42. The other end of the interconnecting connector N42 is connected to the movable extension C41. The interconnecting connector N42 and the movable extension C41 are located on the connecting frame M44, and the connecting frame M44 is connected to the insert plate B46. The connecting seat Q45, the insert plate B46, and the docking plate K31 are fitted and connected.

[0037] Please see Figure 6 The movable extension C41 is connected to the linkage filter plate V43 under the action of the interconnecting connector N42. When air enters the linkage filter plate V43, the air pressure will act on the interconnecting connector N42. After being subjected to force, the interconnecting connector N42 will press down on the movable extension C41, and the movable extension C41 will retract inward, thereby effectively expelling the air. Example

[0038] Please see Figure 1 The present invention provides a technical solution: a ventilation fan for building ventilation, the structure of which includes a base 1, a main body 6, an air inlet 2, a controller 3, a ventilation fan 5, and an opening and closing device 4. The main body 6 is installed on the base 1, the controller 3 is provided on the main body 6, the air inlet 2 and the ventilation fan 5 are respectively provided on the left and right sides of the main body 6, and the opening and closing device 4 is installed on the ventilation fan 5.

[0039] Please see Figure 2 The opening and closing device 4 includes a buffer spring plate Q1, a guide plate E3, a movable support rod W2, a flow port T5, an opening and closing component R4, a frame U7, a movable groove Y6, a processing component I8, and an inner frame P9. The buffer spring plate Q1 is installed inside the inner frame P9. The inner frame P9 is installed in the middle position inside the movable groove Y6. A movable support rod W2 is provided between the inner frame P9 and the movable groove Y6. The movable groove Y6 is located inside the frame U7. The upper and lower ends of the frame U7 are respectively provided with a guide plate E3 and a flow port T5. The flow port T5 is connected to the movable groove Y6 and an opening and closing component R4 is provided between them. The guide plate E3 is connected to the inner frame P9. The processing component I8 is located inside the inner frame P9 and is connected to the opening and closing component R4. The frame U7 is installed on the ventilation fan 5.

[0040] The aforementioned buffer plate Q1 is used in conjunction with the inner frame P9. When air enters the inner frame P9, the airflow impact force will act on the buffer plate Q1, which effectively buffers the air and stably guides it into the inner frame P9.

[0041] Please see Figure 7 The opening and closing assembly R4 includes a rotating shaft E51, a telescopic rod Y54, a connecting block I56, an elastic mesh plate T52, a connecting rod U55, and a pulling rod R53. The rotating shaft E51 is connected to the telescopic rod Y54 and the pulling rod R53. The other ends of the two telescopic rods Y54 are respectively connected to the two connecting blocks I56. An elastic mesh plate T52 is provided between the two connecting blocks I56. A connecting rod U55 is connected to the outside of the connecting block I56. The connecting rod U55 is movably connected to the pulling rod R53. The rotating shaft E51 is connected to the counter-pull rod Y13. The elastic mesh plate T52 is connected between the flow port T5 and the movable groove Y6.

[0042] Please see Figure 7 An elastic mesh plate T52 is connected between the two connecting blocks I56. The elastic mesh plate T52 has a certain elasticity and toughness, and the through holes inside it will expand and open as the elastic mesh plate T52 moves.

[0043] The working principle of the above technical solution is explained below: In use, the frame U7 is mounted on the main body 6 and connected to the ventilation fan 5 via the guide plate E3. The ventilation fan 5, driven by a motor, transports airflow, which is then guided through the guide plate E3 into the inner frame P9. A buffer plate Q1 is installed at the end of the inner frame P9. The impact force of the airflow acts on the buffer plate Q1, effectively buffering the airflow and ensuring its stable entry into the inner frame P9. The controller 3 rotates the rotating stop at the lower end of the card holder T12 clockwise, opening the ventilation opening at the lower end of the card holder T12. External air then flows into the guide component I15 under the action of the ventilation fan 5. The sound-absorbing layer absorbs and reduces the noise of the ventilation fan during operation. The guide component I15 has three docking plates K31. Swinging components C35 are connected to the rotating shafts E51 on both sides of the three docking plates K31. A connecting spring plate X34 is connected to the other end of the swinging component C35, connecting the three swinging components C35 in series. When the guide component I15 is impacted by air, the three docking plates K31 inside extend and open under the action of the connecting spring plate X34, allowing external air to enter the docking plates K31 and be conducted to the connecting seat Q45. The connecting seat Q45 then guides the air to the linkage filter plate V43, which processes dust and impurities in the air. When impacted by the flow of gas, the connecting member N42 at its lower end is pressed down. The pressure on the connecting member N42 causes the movable extension C41 to retract inwards, effectively transmitting the received airflow further inwards to the inner docking plate K31. When the three docking plates K31 and the flow guide Z33 work together to conduct airflow, the three docking plates K31 are equidistantly installed in corresponding scaling sections K26. These multi-section scaling sections K26 are arranged sequentially from smallest to largest on the stacking assembly F23. Through the interaction of the stacking assembly F23 and the connecting rod H24, the multi-section scaling sections K26 drive the docking plates K31 to extend and retract vertically. The processed gas then passes through the guide diffuser I15. When the docking plate K31 is extended, a tie rod Y13 is installed on its end. The tie rod Y13 moves outward as the docking plate K31 moves, and its end is inserted into the rotating shaft E51. The rotating shaft E51 moves with the push of the tie rod Y13. Under the action of the guide component I15, the tie rod Y13 pushes the rotating shaft E51 downward, causing the rotating shaft E51 to move inward. The telescopic rod Y54 and the pull rod R53 connected to its upper end extend outward accordingly. The two connecting blocks I56 move outward under the action of the telescopic rod Y54 and the pull rod R53. The elastic mesh plate T52 between the two connecting blocks I56 is then pulled outward, causing the through holes on the elastic mesh plate T52 to expand and open, which helps the air to circulate.This allows air to flow out through the holes on the elastic mesh plate T52 to the flow port T5. The flow port T5 then guides the air into the main body 6 for purification and filtration. The filtered air is then introduced into the room through the air inlet 2, providing excellent dust prevention and ventilation. In winter or typhoon seasons, the controller 3 rotates the rotating stop at the lower end of the card holder T12 counterclockwise, blocking the ventilation opening at the lower end of the card holder T12. The docking plate K31 inside the guide component I15, unaffected by wind, will be pressed together by the restraint of the connecting spring plate X34. The scaling adjustment component K26 and the stacking kit F23 work together to restrain the docking plate K31. The connecting seat Q45 between the two docking plates K31 will move inward, and the internal movable extension C41 and interconnection... Connector N42 and linkage filter plate V43 retract and stack together, effectively blocking external cold air or rainwater in conjunction with the rotating baffle. The connecting rod H24 at the upper end of the scaling adjustment component K26 moves downward, pulling the rotating shaft E51 outward. The rotating shaft E51 simultaneously pulls the telescopic rod Y54 and the pull rod R53 outward. Under the action of the telescopic rod Y54 and the pull rod R53, the two connecting blocks I56 move inward, causing the elastic mesh plate T52 to retract, reducing its internal through-holes and effectively obstructing airflow. The opening and closing component R4 and the processing component I8 work together to effectively block external cold air or rainwater, preventing outdoor cold air or rainwater from directly entering the room through the ventilation openings. This effectively protects equipment, raw materials, or finished products stored in the ventilated area, allowing work to proceed normally within the building.

[0044] In summary, this invention employs a combination of a base, main body, air inlet, controller, ventilation fan, and opening / closing device to form a new building ventilation fan. The frame is connected to the ventilation fan. During ventilation, external air flows into the inner frame through the guide plate. The opening and closing components and the processing components inside the inner frame work together to divert and guide the air to the flow inlet. The flowing air is then introduced into the main body for purification. The purified air then flows into the room through the air inlet, thus transporting airflow. In winter or during typhoons or other inclement weather, the opening and closing components and the processing components work together to act as a barrier, effectively preventing cold air or rainwater from entering the room through the ventilation inlet.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A ventilation fan for building ventilation, comprising a base (1), a main body (6), an air inlet (2), a controller (3), a ventilation fan (5), and an opening and closing device (4), characterized in that: The base (1) is equipped with a main body (6), the main body (6) is equipped with a controller (3), the main body (6) is equipped with an air inlet (2) and a ventilation fan (5), and the ventilation fan (5) is equipped with an opening and closing device (4). The opening and closing device (4) includes a buffer spring plate (Q1), a guide plate (E3), a movable support rod (W2), a flow port (T5), an opening and closing component (R4), a frame (U7), a movable groove (Y6), a processing component (I8), and an inner frame (P9). The buffer spring plate (Q1) is installed on the inner frame (P9). A movable support rod (W2) is provided between the inner frame (P9) and the movable groove (Y6). The movable groove (Y6) is located on the frame (U7). An opening and closing component (R4) is provided between the flow port (T5) on the frame (U7) and the movable groove (Y6). The guide plate (E3) is connected to the inner frame (P9). The processing component (I8) is located on the inner frame (P9) and connected to the opening and closing component (R4). The frame (U7) is installed on the ventilation fan (5). The processing component (I8) includes a support component (R11), a card holder (T12), a guide component (I15), a tie rod (Y13), and a plug (U14). The support component (R11) is mounted on the card holder (T12), and the card holder (T12) is provided with the plug (U14). The guide component (I15) is mounted on the support component (R11), and the tie rod (Y13) is connected to the guide component (I15). The card holder (T12) is located in the inner frame (P9) through the plug (U14) and is connected to the opening and closing component (R4). The support assembly (R11) includes a mounting frame (D21), a stacking kit (F23), a plug rod (J25), a scaling adjustment component (K26), a connecting rod (H24), and a partition plate (G22). The plug rod (J25) passes through the mounting frame (D21) and connects to the stacking kit (F23). The scaling adjustment component (K26) is connected to the stacking kit (F23). The scaling adjustment component (K26) is fitted with the partition plate (G22). The scaling adjustment component (K26) is plugged into the connecting rod (H24). The mounting frame (D21) is mounted on the card holder (T12). The scaling adjustment component (K26) is connected to the guide component (I15). The guide component (I15) includes a docking plate (K31), a flow guide (Z33), a swing component (C35), a connecting shaft (L32), and a connecting spring plate (X34). The docking plate (K31) is connected to the flow guide (Z33). The connecting shaft (L32) on the docking plate (K31) is movably connected to the swing component (C35). The swing component (C35) is connected to the connecting spring plate (X34). The docking plate (K31) is connected to the scaling adjustment component (K26). A tie rod (Y13) is connected to the docking plate (K31).

2. A ventilation fan for building ventilation according to claim 1, characterized in that: The flow guide (Z33) includes a movable extension (C41), an insert plate (B46), an interconnecting connector (N42), a connecting seat (Q45), a linkage filter plate (V43), and a connecting frame (M44). The insert plate (B46) is connected to the movable extension (C41) and the connecting seat (Q45). The linkage filter plate (V43) on the connecting seat (Q45) is connected to the interconnecting connector (N42). The interconnecting connector (N42) and the movable extension (C41) are located on the connecting frame (M44). The connecting frame (M44) is connected to the insert plate (B46). The connecting seat (Q45), the insert plate (B46), and the docking plate (K31) are fitted and connected.

3. A ventilation fan for building ventilation according to claim 1, characterized in that: The opening and closing assembly (R4) includes a rotating shaft (E51), a telescopic rod (Y54), a connecting block (I56), an elastic mesh plate (T52), a connecting rod (U55), and a pulling rod (R53). The telescopic rod (Y54) and the pulling rod (R53) are connected to the rotating shaft (E51). The telescopic rod (Y54) and the connecting rod (U55) are connected to the connecting block (I56). The connecting block (I56) is provided with an elastic mesh plate (T52). The connecting rod (U55) is movably connected to the pulling rod (R53). The rotating shaft (E51) is connected to the counter-pull rod (Y13). The elastic mesh plate (T52) is connected between the flow port (T5) and the movable groove (Y6).

4. A ventilation fan for building ventilation according to claim 1, characterized in that: Multiple scaling elements (K26) are isosceles trapezoidal structures of varying sizes, connected by a stacking kit (F23) to form a triangular structure.

5. A ventilation fan for building ventilation according to claim 1, characterized in that: The docking plate (K31) is connected to the swinging component (C35) on both sides to form a "︹" shaped structure.

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