A ventilator for building ventilation

Abstract

The present invention discloses a ventilator for building ventilation, which relates to the field of ventilation technology, a mounting plate, a circular hole is provided at the center of the mounting plate, a mounting tube is fixedly connected to the edge of the circular hole in the center of the mounting plate, a connecting hole is provided around the outer wall of the middle position of the mounting tube, a wind shield is fixedly connected to the middle position of the mounting tube, a plurality of air inlet flaps are fixedly connected to the top of the wind shield, the air inlet flaps are evenly arranged and installed at a certain angle, a fixing ring is fixedly connected to the top of the air inlet flap, the fixing ring can make the arrangement structure of the air inlet flap more stable, a rotating ring is slidably connected to the top of the mounting tube, a plurality of wind hemispheres are fixedly connected to the top of the rotating ring. The ventilator for building ventilation disclosed by the present invention has the technical effect that a natural ventilator can adjust the size of the inlet and outlet according to the size of the wind force in strong wind weather to prevent the natural ventilator from twisting and deforming.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation, and in particular to a ventilator for building ventilation. Background Art

[0002] Ventilator, powered ventilator, window ventilator that relies on its own power device to achieve ventilation, installed on the building's external protective structure or between the wall and doors and windows, has certain wind pressure resistance, watertightness, airtightness, sound insulation and other properties when in working state, and can achieve controllable ventilation indoors and outdoors. It can be installed on any window type and position, on the window frame, on the window sash, and as part of the window sill, it can also be installed at the bottom of the entire window sill. Window ventilators can be installed horizontally or vertically.

[0003] Natural ventilator: A window ventilator that relies on the temperature difference between indoor and outdoor, wind pressure, etc. to create an air pressure difference to achieve ventilation. Outside air enters the room directly from the bottom of the ventilator, and uses the air pressure difference between outdoor and indoor to implement fresh air with less disturbance, flowing through the work area, and being discharged from the upper return air outlet of the ventilator. In strong winds, the wind force of general natural ventilators will cause the natural ventilator to twist and deform. Such natural ventilators cannot be used in extreme weather environments and cannot adapt to a variety of environmental conditions, so they cannot meet such needs. Summary of the invention

[0004] The invention discloses a ventilator for building ventilation, aiming to solve the technical problem that the natural ventilator may be twisted and deformed by wind force in strong wind weather.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A ventilator for building ventilation comprises a mounting plate, a circular hole is provided at the center of the mounting plate, a mounting tube is fixedly connected to the edge of the circular hole in the center of the mounting plate, a connecting hole is provided around the outer wall in the middle of the mounting tube, a wind shield is fixedly connected to the middle of the mounting tube, a plurality of air inlet flaps are fixedly connected to the top of the wind shield, the air inlet flaps are evenly arranged and installed at a certain angle, a fixing ring is fixedly connected to the top of the air inlet flap, the fixing ring can make the arrangement structure of the air inlet flap more stable, a rotating ring is slidably connected to the top of the mounting tube, a plurality of wind hemispheres are fixedly connected to the top of the rotating ring, two fixing plates are rotatably connected to the top of the mounting tube, the fixing plates are symmetrically mounted on the inner wall of the mounting tube near the top, and the fixing plates are fixedly mounted on the inner wall of the mounting tube near the top. The windshield is installed with a certain height difference, and one side of the fixed plate is rotatably connected to a wind shield plate, and the wind shield plate also has a height difference, and they are staggered and can rotate relative to each other without interference. The upper surface of the wind shield plate is fixedly connected to a rotating rod, one end of the rotating rod is rotatably connected to a rotating plate, and the other end of the rotating plate is rotatably connected to a rotating ring, and one side edge of the wind shield plate is fixedly connected to a return spring, and the other end of the return spring is fixedly connected to an inner wall of the mounting tube near the top, and an annular step is provided on the edge of the mounting tube near the top, and a plurality of air holes are opened on the surface of the annular step, and a connecting sleeve is inserted into the inside of the air hole, and an air outlet pipe is inserted at the top of the connecting sleeve, and the air outlet pipe passes through the outer wall of the mounting tube and the wind shield, and a wind and light tube is inserted at the top of the annular step.

[0007] The air inlet flaps are in the shape of a spherical shell with an angle of thirty degrees and are evenly arranged at a certain angle, allowing wind to blow into the interior only from a certain angle. Due to the circular arrangement, wind from any direction can enter.

[0008] By providing air inlet flaps, wind can enter the ventilator through the air inlet flaps. The air inlet flaps are in the shape of a spherical shell with an angle of degrees and are evenly arranged at a certain angle, allowing wind to blow into the interior only from a certain angle. Due to the circular arrangement, wind from any direction can enter, forming a clockwise rotating airflow inside, and the airflow enters the building through the wind tube to achieve the effect of natural ventilation. In extreme weather, when the wind is strong, the clockwise rotating airflow inside blows the wind hemisphere, causing the wind hemisphere and the rotating ring to rotate clockwise, and the rotating plate drives the wind shield to rotate. The wind shield also has a height difference, and can rotate relative to each other by staggering each other. The movement will not interfere, the two wind shields rotate with each other, the special shape of the wind shields will reduce the size of the top entrance of the wind tube when they rotate with each other, strong wind will reduce the top entrance of the wind tube, reduce the airflow into the room, ensure the smooth air flow in the room, the two wind shields rotate to expose the connecting sleeve at the bottom, the excess wind will flow out from the connecting sleeve and the air outlet pipe, reducing the pull of the wind on the ventilator, the blown air is blown in the opposite direction, offsetting the torque effect of the wind on the ventilator, making the ventilator more stable, when the wind decreases, the reset spring pulls the wind shield back to the initial position, so that the size of the top entrance of the wind tube returns to its original state.

[0009] In a preferred embodiment, a transparent cover is fixedly connected to the top of the fixing ring, a reflective block is fixedly connected to the inner wall of the top of the transparent cover, a lampshade is sleeved on the bottom of the wind and light tube, a plurality of connecting rods are fixedly connected to the bottom of the wind and light tube, and a reflective disk is fixedly connected to one end of the connecting rod.

[0010] By providing a transparent cover and a reflective block, on sunny days, sunlight enters through the transparent cover, and enters the interior after being reflected by the reflective block, thereby achieving a lighting effect. The reflective bevel angles of the transparent cover and the reflective block are special, and the design allows the light to enter the interior vertically. There is a reflective coating on the inner wall of the bottom of the lampshade, and the surface of the reflective disk has a metal coating, and the surface is polished and has good reflective properties. The reflective coating on the inner wall of the bottom of the lampshade is a matte coating, which has a certain reflective effect, but the reflective surface is uneven, which causes diffuse reflection of the light to prevent glare and achieve better lighting effects.

[0011] In a preferred embodiment, an annular boss is provided on the inner wall of the mounting tube, a plurality of movable plates are rotatably connected inside the annular boss, an air inlet and an air outlet are provided inside the annular boss, an air outlet pipe is plugged into the air outlet, and the other end of the air outlet pipe is plugged into the inside of the air outlet pipe.

[0012] By providing a movable plate, when other ventilation outlets inside the building are closed, indoor air can pass through the air inlet to blow the movable plate to open the passage, and the internal air can flow to the outside through the air outlet and the air outlet pipe. The outdoor air enters the air outlet pipe, which will cause the movable plate to rotate and close the passage, thereby achieving the effect of one-way ventilation. In this way, even if the building has no other ventilation outlets, the ventilator can still make the air in the building flow, thereby achieving a good ventilation effect.

[0013] In a preferred solution, a water pipe is inserted through the inner wall of the windshield near the air outlet pipe.

[0014] By providing a water guide pipe, when it rains, rainwater will enter the interior through the air inlet flap. Since the top of the installation tube is very high, it is difficult for rainwater to enter, and the rainwater is discharged through the water guide pipe.

[0015] In a preferred solution, a plurality of mounting holes are provided on the upper surface of the mounting plate near the edge.

[0016] By providing a mounting plate with a larger area, threaded holes are opened on the top of the building, and the mounting plate is fixed to the top of the building with bolts through the mounting holes, the area of ​​the mounting plate is as large as possible to increase the contact area with the building, and the number of mounting holes is increased to make the connection more secure. When subjected to external force, the larger area of ​​the mounting plate can also reduce the local stress of the mechanism.

[0017] As can be seen from the above, the present invention provides a building ventilation ventilator with the technical effect of adjusting the size of the inlet and outlet of a natural ventilator according to the size of the wind in strong wind weather to prevent the natural ventilator from twisting and deforming. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a schematic diagram of the top view of the structure of a ventilator for building ventilation proposed by the present invention.

[0019] Figure 2 The present invention is a schematic diagram of the structure of a ventilator for building ventilation as viewed from above.

[0020] Figure 3 The present invention is a schematic diagram of the overall cross-sectional structure of a ventilator for building ventilation proposed by the present invention.

[0021] Figure 4 The present invention is a partial cross-sectional structural schematic diagram of a ventilator for building ventilation proposed by the present invention.

[0022] Figure 5 The present invention is a schematic diagram of the cross-sectional structure of a lampshade of a ventilator for building ventilation.

[0023] Figure 6A ventilator for building ventilation proposed by the present invention Figure 4 Schematic diagram of the structure at point A in the middle.

[0024] Figure 7 A ventilator for building ventilation proposed by the present invention Figure 4 Schematic diagram of the structure at point B in the middle.

[0025] Figure 8 This is a schematic diagram of the internal structure of a ventilator for building ventilation proposed by the present invention.

[0026] In the figure: 1. mounting plate; 2. lampshade; 3. mounting hole; 4. wind shield; 6. air inlet flap; 7. transparent cover; 8. fixing ring; 9. mounting tube; 10. reflective plate; 11. wind and light tube; 12. air outlet pipe; 13. wind hemisphere; 14. wind shield; 15. air outlet pipe; 16. connecting rod; 17. reflective block; 18. movable plate; 19. water guide pipe; 20. connecting sleeve; 21. rotating plate; 22. rotating ring; 23. fixing plate; 24. reset spring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] A ventilator for building ventilation disclosed by the present invention is mainly used in scenarios where a natural ventilator may be twisted and deformed by wind in strong wind weather.

[0029] Reference Figure 1 , Figure 2 and Figure 3A ventilator for building ventilation comprises a mounting plate 1, a circular hole is provided at the center of the mounting plate 1, a mounting tube 9 is fixedly connected to the edge of the circular hole in the center of the mounting plate 1, a connecting hole is provided around the outer wall of the middle position of the mounting tube 9, a wind shield 4 is fixedly connected to the middle position of the mounting tube 9, a plurality of air inlet flaps 6 are fixedly connected to the top of the wind shield 4, the air inlet flaps 6 are evenly arranged and installed at a certain angle, a fixing ring 8 is fixedly connected to the top of the air inlet flaps 6, the fixing ring 8 can make the arrangement structure of the air inlet flaps 6 more stable, a rotating ring 22 is slidably connected to the top of the mounting tube 9, a plurality of wind hemispheres 13 are fixedly connected to the top of the rotating ring 22, two fixing plates 23 are rotatably connected to the top of the mounting tube 9, the fixing plates 23 are symmetrically installed on the inner wall of the mounting tube 9 near the top, and the fixing plate 23 is installed There is a certain height difference, one side of the fixed plate 23 is rotatably connected with the wind shield plate 14, and the wind shield plate 14 also has a height difference, and they are staggered and can rotate relative to each other without interference. The upper surface of the wind shield plate 14 is fixedly connected with a rotating rod, one end of the rotating rod is rotatably connected with a rotating plate 21, and the other end of the rotating plate 21 is rotatably connected to the rotating ring 22, and one side edge of the wind shield plate 14 is fixedly connected with a reset spring 24, and the other end of the reset spring 24 is fixedly connected to the inner wall of the mounting tube 9 near the top, and an annular step is provided on the edge of the mounting tube 9 near the top, and a plurality of air holes are opened on the surface of the annular step, and a connecting sleeve 20 is inserted inside the air hole, and an air outlet pipe 12 is inserted on the top of the connecting sleeve 20, and the air outlet pipe 12 passes through the outer wall of the mounting tube 9 and the wind shield 4, and a wind and light tube 11 is inserted on the top of the annular step.

[0030] Among them, the air inlet petals 6 are in the shape of a spherical shell with an angle of thirty degrees and are evenly arranged at a certain angle, allowing wind to blow into the interior only from a certain angle. Due to the circular arrangement, wind from any direction can enter.

[0031] In this embodiment, wind can enter the ventilator through the air inlet flap 6. The air inlet flap 6 is in the shape of a spherical shell with an angle of thirty degrees and is evenly arranged at a certain angle, allowing wind to blow into the interior only from a certain angle. Due to the circular arrangement, wind from any direction can enter, forming a clockwise rotating airflow inside. The airflow enters the building through the wind tube 11 to achieve the effect of natural ventilation. In extreme weather, when the wind is strong, the clockwise rotating airflow inside blows the wind hemisphere 13, causing the wind hemisphere 13 and the rotating ring 22 to rotate clockwise, and the rotating plate 21 drives the wind shield plate 14 to rotate. The wind shield plate 14 also has a height difference, and can rotate relative to each other without being staggered. Interference, the two wind shields 14 rotate with each other. The special shape of the wind shields 14 will reduce the size of the top entrance of the wind tube 11 when they rotate with each other. The strong wind will reduce the top entrance of the wind tube 11, reduce the airflow into the room, and ensure the smooth air flow in the room. The two wind shields 14 rotate to expose the connecting sleeve 20 at the bottom, and the excess wind will flow out from the connecting sleeve 20 and the air outlet pipe 12, reducing the pull of the wind on the ventilator. The blown air is blown in the opposite direction, which offsets the torsional effect of the wind on the ventilator and makes the ventilator more stable. When the wind decreases, the reset spring 24 pulls the wind shield 14 back to its initial position, so that the size of the top entrance of the wind tube 11 returns to its original state.

[0032] Reference Figure 1 and Figure 4 In a preferred embodiment, the top of the fixing ring 8 is fixedly connected to the transparent cover 7 , and the inner wall of the top of the transparent cover 7 is fixedly connected to the reflective block 17 .

[0033] The transparent cover 7 is made of transparent plastic with good light transmittance. The surface of the reflective block 17 has a metal coating, and the surface is polished and has good reflective performance.

[0034] In this embodiment, on a sunny day, sunlight enters through the transparent cover 7 and enters the interior after being reflected by the reflective block 17, thereby achieving a lighting effect. The reflective angles of the transparent cover 7 and the reflective block 17 are special, and the design allows the light to enter the interior vertically.

[0035] Reference Figure 2 , Figure 3 and Figure 5 In a preferred embodiment, the bottom of the wind and light tube 11 is sleeved with a lampshade 2 , and the bottom of the wind and light tube 11 is fixedly connected with a plurality of connecting rods 16 , and one end of the connecting rod 16 is fixedly connected with a reflective plate 10 .

[0036] Among them, there is a reflective coating on the bottom inner wall of the lampshade 2, and the surface of the reflective plate 10 has a metal coating. The surface is polished and has good reflective properties. The reflective coating on the bottom inner wall of the lampshade 2 is a matte coating with a certain reflective effect, but the reflective surface is uneven, which causes diffuse reflection of light to prevent glare and make the lighting effect better.

[0037] In this embodiment, sunlight enters through the transparent cover 7 and is reflected by the reflective block 17, the reflective plate 10 and the lampshade 2, so that the sunlight shines into the room, making the room brighter.

[0038] Reference Figure 3 , Figure 4 and Figure 6 In a preferred embodiment, an annular boss is provided on the inner wall of the mounting tube 9, and a plurality of movable plates 18 are rotatably connected inside the annular boss. An air inlet and an air outlet are provided inside the annular boss, and an air outlet pipe 15 is plugged into the inside of the air outlet, and the other end of the air outlet pipe 15 is plugged into the inside of the air outlet pipe 12.

[0039] In this embodiment, when other ventilation outlets inside the building are closed, indoor air can pass through the air inlet to blow the movable plate 18 to open the passage, and the internal air can flow to the outside through the air outlet and the air outlet pipe 15. The outdoor air enters the air outlet pipe 15, which will cause the movable plate 18 to rotate and close the passage, thereby achieving a one-way ventilation effect. In this way, even if the building has no other ventilation outlets, the ventilator can still make the air in the building flow, achieving a good ventilation effect.

[0040] Reference Figure 1 and Figure 7 In a preferred embodiment, a water pipe 19 is inserted through the inner wall of the windshield 4 near the air outlet pipe 12 .

[0041] In this embodiment, when it rains, rainwater will enter the interior through the air inlet flap 6. Since the top of the mounting tube 9 is very high, it is difficult for rainwater to enter, and the rainwater is discharged through the water conduit 19.

[0042] Reference Figure 1 and Figure 2 In a preferred embodiment, a plurality of mounting holes 3 are provided on the upper surface of the mounting plate 1 near the edge.

[0043] In this embodiment, a threaded hole is opened on the top of the building, and the mounting plate 1 is fixedly connected to the top of the building using bolts through the mounting holes 3. The area of ​​the mounting plate 1 is as large as possible to increase the contact area with the building, and the number of mounting holes 3 is increased to make the connection more secure. When subjected to external force, the larger area of ​​the mounting plate 1 can also reduce the local stress of the mechanism.

[0044] Working principle: When in use, a threaded hole is opened on the top of the building, and the mounting plate 1 is fixedly connected to the top of the building with bolts through the mounting holes 3. The area of ​​the mounting plate 1 is as large as possible to increase the contact area with the building, and the number of mounting holes 3 is increased to make the connection more secure. When subjected to external force, the larger area of ​​the mounting plate 1 can also reduce the local stress of the mechanism. The wind can enter the ventilator through the air inlet flap 6. The air inlet flap 6 is in the shape of a spherical shell with a 30-degree angle and is evenly arranged at a certain angle, allowing wind to blow into the interior only from a certain angle. Due to the circular arrangement, wind from any direction can enter, forming a clockwise rotating air chamber inside. The airflow enters the building through the wind tube 11 to achieve the effect of natural ventilation. In extreme weather, when the wind is strong, the clockwise rotating airflow inside blows the wind hemisphere 13, causing the wind hemisphere 13 and the rotating ring 22 to rotate clockwise, and the rotating plate 21 pushes the wind shield 14 to rotate. The wind shields 14 also have a height difference, and they can rotate relative to each other without interfering with each other. The two wind shields 14 rotate with each other. The special shape of the wind shields 14 will reduce the size of the top entrance of the wind tube 11 when they rotate with each other. The strong wind will reduce the top entrance of the wind tube 11, reduce the airflow into the room, and ensure the indoor air The flow is smooth, and the two wind shields 14 rotate to expose the connecting sleeve 20 at the bottom. The excess wind will flow out from the connecting sleeve 20 and the air outlet pipe 12, reducing the pulling of the wind on the ventilator. The blown air is blown out in the opposite direction, offsetting the torsional effect of the wind on the ventilator, making the ventilator more stable. When the wind force decreases, the reset spring 24 pulls the wind shield 14 back to the initial position, so that the size of the top entrance of the wind tube 11 returns to its original state. The air inlet of the annular boss is connected to the indoor space, and the air outlet is connected to the outdoor space. When other ventilation outlets inside the building are closed, the indoor air can pass through the air inlet to blow the movable plate 18 to open the channel. Internal air can flow to the outdoors through the air outlet and the air outlet pipe 15. When the outdoor air enters the air outlet pipe 15, the movable plate 18 will rotate to close the passage, thereby achieving a one-way ventilation effect. In this way, even if the building has no other through-ports, the ventilator can still allow air to flow in the building, thereby achieving a good ventilation effect. When it rains, rainwater will enter the interior through the air inlet flap 6. Since the top of the mounting tube 9 is very high, it is difficult for rainwater to enter, and the rainwater is discharged through the water guide pipe 19. On sunny days, sunlight enters through the transparent cover 7, and is reflected by the reflective block 17, the reflective disk 10 and the lampshade 2, so that the sunlight shines into the room, making the room brighter.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ventilator for building ventilation, comprising a mounting plate (1), characterized in that: A circular hole is provided at the center of the mounting plate (1); a mounting tube (9) is fixedly connected to the edge of the circular hole at the center of the mounting plate (1); a connection hole is provided around the outer wall at the middle of the mounting tube (9); a wind shield (4) is fixedly connected to the middle of the mounting tube (9); a plurality of air inlet flaps (6) are fixedly connected to the top of the wind shield (4); the air inlet flaps (6) are evenly arranged and installed at a certain angle; a fixing ring (8) is fixedly connected to the top of the air inlet flaps (6); the fixing ring (8) can make the arrangement structure of the air inlet flaps (6) more stable; a rotating ring (22) is slidably connected to the top of the mounting tube (9); a plurality of wind hemispheres (13) are fixedly connected to the top of the rotating ring (22); two fixing plates (23) are rotatably connected to the top of the mounting tube (9); the fixing plates (23) are symmetrically installed on the inner wall of the mounting tube (9) near the top; the fixing plates (23) are installed with a certain height difference The fixed plate (23) is rotatably connected to a wind shield plate (14) on one side, and the wind shield plates (14) also have a height difference, and are staggered to be able to rotate relative to each other without interfering with each other. The upper surface of the wind shield plate (14) is fixedly connected to a rotating rod, one end of the rotating rod is rotatably connected to a rotating plate (21), and the other end of the rotating plate (21) is rotatably connected to a rotating ring (22). A return spring (24) is fixedly connected to an edge of one side of the wind shield plate (14), and the other end of the return spring (24) is fixedly connected to an inner wall of the mounting tube (9) near the top. An annular step is provided on the edge of the mounting tube (9) near the top, and a plurality of air holes are provided on the surface of the annular step. A connecting sleeve (20) is inserted into the interior of the air hole, and an air outlet pipe (12) is inserted into the top of the connecting sleeve (20). The air outlet pipe (12) passes through the outer wall of the mounting tube (9) and the wind shield (4), and a wind tube (11) is inserted into the top of the annular step.

2. A ventilator for building ventilation according to claim 1, characterized in that: The air inlet flaps (6) are in the shape of a spherical shell with an angle of thirty degrees and are evenly arranged at a certain angle, allowing wind to blow into the interior only from a certain angle. Due to the circular arrangement, wind from any direction can enter.

3. A ventilator for building ventilation according to claim 1, characterized in that: The top of the fixing ring (8) is fixedly connected to a transparent cover (7), and the inner wall of the top of the transparent cover (7) is fixedly connected to a reflective block (17).

4. A ventilator for building ventilation according to claim 3, characterized in that: The transparent cover (7) is made of transparent plastic with good light transmittance, and the reflective block (17) has a metal coating on its surface, which is polished and has good reflective properties.

5. A ventilator for building ventilation according to claim 2, characterized in that: The bottom of the wind and light tube (11) is sleeved with a lampshade (2), the bottom of the wind and light tube (11) is fixedly connected to a plurality of connecting rods (16), and one end of the connecting rod (16) is fixedly connected to a reflective plate (10).

6. A ventilator for building ventilation according to claim 5, characterized in that: The bottom inner wall of the lampshade (2) is provided with a reflective coating, and the surface of the reflective disk (10) is provided with a metal coating, which is polished and has good reflective properties.

7. A ventilator for building ventilation according to claim 1, characterized in that: An annular boss is provided on the inner wall of the mounting tube (9), a plurality of movable plates (18) are rotatably connected to the interior of the annular boss, an air inlet and an air outlet are provided inside the annular boss, an air outlet pipe (15) is plugged into the interior of the air outlet, and the other end of the air outlet pipe (15) is plugged into the interior of the air outlet pipe (12).

8. A ventilator for building ventilation according to claim 1, characterized in that: A water guide pipe (19) is inserted and penetrated through a position on the inner wall of the wind shield (4) close to the air outlet pipe (12).

9. A ventilator for building ventilation according to claim 1, characterized in that: A plurality of mounting holes (3) are provided on the upper surface of the mounting plate (1) near the edge.

10. A ventilator for building ventilation according to claim 7, characterized in that: The air inlet of the annular boss is connected to the indoor space, and the air outlet is connected to the outdoor space. When other ventilation outlets inside the building are closed, indoor air can pass through the air inlet to blow the movable plate (18) to open the passage, and the indoor air can flow into the outdoor space through the air outlet and the air outlet pipe (15). When the outdoor air enters the air outlet pipe (15), the movable plate (18) will rotate to close the passage, thereby achieving a one-way ventilation effect.

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