Building energy-saving ventilation device

Abstract

The invention discloses a building energy-saving ventilation device, and relates to the technical field of building ventilation, the building energy-saving ventilation device comprises an annular plate and a fixed plate, the annular plate and the fixed plate are fixedly connected, energy-saving air supply assemblies are arranged on the annular plate and the fixed plate at the same time, and a second gear rotates to drive a first transmission rod to rotate; a first transmission rod rotates to drive a first guide fan blade to rotate, the first guide fan blade rotates to convey external air to the inner side of the building, energy-saving exhaust assemblies are arranged on an annular plate and a fixed plate, and sensitive fan blades rotate to drive a fourth gear to rotate; air on the inner side of the building can be conveyed to the outer side of the building through rotation of the second guide fan blades, an auxiliary pipe is arranged between the first guide fan blades and the second guide fan blades, the second guide fan blades exhaust air outwards, and upward airflow generated when the second guide fan blades rotate can assist the first guide fan blades in rotating air supply through the auxiliary pipe.

Description

Technical Field

[0001] The invention relates to the technical field of building ventilation, and in particular to a building energy-saving ventilation device. Background Art

[0002] Architecture is the art and science of designing, building and maintaining buildings and structures. It not only involves the creation of physical space, but also covers a variety of projects from residential and commercial buildings to public facilities and infrastructure. Ventilating buildings is an important measure to ensure indoor air quality, protect the health of residents, improve living comfort, and achieve energy conservation and emission reduction. Building ventilation is divided into natural ventilation and mechanical ventilation to keep the indoor air environment in compliance with hygiene standards.

[0003] The existing ventilation device includes a fan and a ventilation duct, the fan is connected to one end of the ventilation duct, and the other end of the ventilation duct is a closed structure and is horizontally arranged in the room, and air outlets are spaced apart at the bottom of the ventilation duct, and the air outlets generally correspond to the workstations in the room. When in use, turn on the fan, and wind can be delivered to the corresponding position from the air outlet. The existing ventilation device relies on the fan and the fixed ventilation duct, and the fan forces air to be supplied to the horizontally laid pipe, and then the air is delivered to the indoor workstation at a fixed point through the air outlet below. The energy consumption is high, the continuous operation of the fan consumes a lot of electricity, the airflow organization is single, the horizontal air supply is easy to cause indoor temperature stratification, and it is not easy to adjust according to the changes in the external airflow. When the air is supplied horizontally, the cold air or the hot air diffuses in the horizontal direction, and the air flow is difficult to effectively cover the entire space, which can easily cause indoor temperature stratification. Therefore, it is necessary to propose a building energy-saving ventilation device. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art, such as high energy consumption, large amount of electric energy consumed by continuous operation of the fan, single airflow organization, horizontal air supply easily causing indoor temperature stratification, and difficulty in adjusting according to changes in external airflow, cold air or hot air diffuses in the horizontal direction during horizontal air supply, and air flow is difficult to effectively cover the entire space, and to propose a building energy-saving ventilation device.

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

[0006] A building energy-saving ventilation device, comprising an annular plate and a fixing plate, which are fixedly connected between the annular plate and the fixing plate. An energy-saving air supply assembly is provided on both the annular plate and the fixing plate. The energy-saving air supply assembly includes a first transmission rod and a first guiding air blade movably connected to the annular plate, and a sensitive fan blade, a first rotating rod, and a second gear provided on the upper part of the first rotating rod movably connected to the fixing plate. The rotation of the sensitive fan blade will drive the second gear to rotate, the rotation of the second gear will drive the first transmission rod to rotate, the rotation of the first transmission rod will drive the first guiding air blade to rotate, and the rotation of the first guiding air blade will convey external air to the inside of the building. An energy-saving exhaust assembly is provided on the annular plate and the fixing plate. The energy-saving exhaust assembly includes a second transmission rod and a second guiding air blade movably connected to the annular plate, and a sensitive fan blade, a third rotating rod provided outside the fixing plate, and a fourth gear movably connected to the fixing plate. The rotation of the sensitive fan blade will drive the fourth gear to rotate, the rotation of the fourth gear will drive the third rotating rod to rotate, the rotation of the third rotating rod will drive the second guiding air blade to rotate, and the rotation of the second guiding air blade will convey the gas inside the building to the outside of the building. An auxiliary pipe is provided between the first guiding air blade and the second guiding air blade. The second guiding air blade exhausts outward, and the upward air flow generated when the second guiding air blade rotates will pass through the auxiliary pipe to assist the first guiding air blade to rotate and supply air.

[0007] The above technical solution further includes:

[0008] It is rotationally connected between the upper part of the fixing plate and the sensitive fan blade. A first gear is fixedly connected to the outside of the sensitive fan blade, and the rotation of the sensitive fan blade will drive the first gear to rotate.

[0009] It is rotationally connected between the outside of the fixing plate and the first rotating rod. The upper part of the first rotating rod is fixedly connected to the second gear, and the second gear meshes with the first gear. The rotation of the first gear will drive the second gear to rotate.

[0010] One end of the first rotating rod away from the second gear is fixedly connected to a first bevel gear. A air supply pipe is movably connected to the outside of the first rotating rod. The air supply pipe is fixedly connected to the annular plate. A limiting plate is fixedly connected to the outside of the air supply pipe. One end of the limiting plate away from the air supply pipe is fixedly connected to an exhaust pipe. The rotation of the second gear will drive the first rotating rod to rotate on the outside of the air supply pipe, and the first bevel gear will rotate while the first rotating rod rotates.

[0011] The outer side of the limiting plate is rotatably connected to the first transmission rod. A second bevel gear is fixedly connected to one end of the first transmission rod close to the first bevel gear. The second bevel gear meshes with the first bevel gear. One end of the first transmission rod far from the second bevel gear is fixedly connected to the first guiding air blade. One end of the first guiding air blade far from the first transmission rod is rotatably connected to the air supply pipe. An air delivery pipe is fixedly connected to the outer side of the air supply pipe. The rotation of the first transmission rod will drive the first guiding air blade to rotate. The first guiding air blade is rotatably connected to the air supply pipe. The rotation of the first guiding air blade will drive the gas outside to enter the inner side of the air delivery pipe.

[0012] The upper part of the fixed plate is rotatably connected to a second rotating rod. A third gear is fixedly connected to one end of the second rotating rod far from the fixed plate. The third gear meshes with the first gear. The rotation of the first gear will drive the third gear to rotate. The rotation of the third gear will drive the second rotating rod to rotate on the upper part of the fixed plate.

[0013] The outer side of the fixed plate is rotatably connected to a third rotating rod. A fourth gear is fixedly connected to one end of the third rotating rod close to the third gear. The rotation direction of the third rotating rod is opposite to that of the first rotating rod. The rotation of the fourth gear will drive the third rotating rod to rotate. The fourth gear meshes with the third gear. A third bevel gear is fixedly connected to one end of the third rotating rod far from the fourth gear.

[0014] One end of the limiting plate far from the first transmission rod is rotatably connected to a second transmission rod. A fourth bevel gear is fixedly connected to one end of the second transmission rod close to the third bevel gear. The fourth bevel gear meshes with the third bevel gear. The rotation of the third bevel gear will drive the fourth bevel gear to rotate. The rotation of the fourth bevel gear will drive the second transmission rod to rotate.

[0015] One end of the exhaust pipe close to the first guiding air blade is fixedly connected to a guiding cylinder. The inner side of the guiding cylinder is rotatably connected to a second guiding air blade. One end of the second guiding air blade far from the guiding cylinder is fixedly connected to the second transmission rod. The rotation of the second transmission rod will drive the second guiding air blade to rotate inside the guiding cylinder.

[0016] An air extraction pipe is fixedly connected to the outer side of the guiding cylinder. The outer side of the air extraction pipe is fixedly connected to an auxiliary pipe. One end of the auxiliary pipe far from the air extraction pipe is fixedly connected to the air delivery pipe. The rotation of the second guiding air blade will extract the air inside the auxiliary pipe.

[0017] The present invention has the following beneficial effects:

[0018] 1. In the present invention, in the energy-saving air supply component, the sensitive fan blades can acutely capture the changes in the external air flow and rotate, driving the second gear to rotate, and then driving the first transmission rod and the first guiding air blade. The rotation of the first guiding air blade forms a directional air flow, continuously delivering fresh external air to the interior of the building to ensure the indoor air quality. At the same time, the energy-saving exhaust component operates synchronously. The rotation of the sensitive fan blades drives the fourth gear to rotate, driving the third rotating rod and the second guiding air blade. The second guiding air blade discharges the polluted indoor air, forming an indoor-outdoor air circulation. Through the indoor-outdoor air circulation, the stratification of the indoor air temperature can be avoided.

[0019] 2. In the present invention, further, an auxiliary pipe is provided between the first guiding air blade and the second guiding air blade. When the second guiding air blade exhausts air outward, the upward air flow generated by it forms auxiliary power through the auxiliary pipe, further promoting the rotation and air supply of the first guiding air blade. This design not only improves the air supply efficiency but also realizes the secondary utilization of energy, significantly reducing energy consumption. Compared with traditional ventilation devices, this innovative design can greatly reduce energy consumption while ensuring the ventilation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of an energy-saving ventilation device for buildings proposed by the present invention;

[0021] Figure 2 is a schematic diagram of the overall sectional structure in the present invention;

[0022] Figure 3 is a schematic diagram of the structure of the energy-saving air supply component in the present invention;

[0023] Figure 4 is Figure 1 a schematic enlarged view of the structure at position A in

[0024] Figure 5 is Figure 3 a schematic enlarged view of the structure at position B in

[0025] Figure 6 is Figure 3 a schematic enlarged view of the structure at position C in

[0026] Figure 7 is Figure 3 a schematic enlarged view of the structure at position D in

[0027] In the figure: 1, annular plate; 2, fixed plate; 3, sensitive fan blade; 4, first gear; 5, first rotating rod; 6, second gear; 7, first bevel gear; 8, second bevel gear; 9, first transmission rod; 10, air supply pipe; 11, limit plate; 12, first guiding air blade; 13, second rotating rod; 14, third gear; 15, third rotating rod; 16, fourth gear; 17, third bevel gear; 18, fourth bevel gear; 19, second transmission rod; 20, exhaust pipe; 21, guiding cylinder; 22, second guiding air blade; 23, air extraction pipe; 24, air conveying pipe; 25, auxiliary pipe. Detailed implementation mode

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0029] Embodiment 1

[0030] As Figures 1-7 shown, a building energy-saving ventilation device proposed by the present invention includes an annular plate 1 and a fixed plate 2, which are fixedly connected between the annular plate 1 and the fixed plate 2. An energy-saving air supply component is arranged on both the annular plate 1 and the fixed plate 2. The energy-saving air supply component includes a first transmission rod 9 and a first guiding air blade 12 movably connected to the annular plate 1, and a sensitive fan blade 3, a first rotating rod 5, and a second gear 6 arranged on the upper part of the first rotating rod 5 movably connected to the fixed plate 2. The rotation of the sensitive fan blade 3 will drive the second gear 6 to rotate. The rotation of the second gear 6 will drive the first transmission rod 9 to rotate. The rotation of the first transmission rod 9 will drive the first guiding air blade 12 to rotate. The rotation of the first guiding air blade 12 will convey the external air to the inside of the building. An energy-saving exhaust component is arranged on both the annular plate 1 and the fixed plate 2. The energy-saving exhaust component includes a second transmission rod 19 and a second guiding air blade 22 movably connected to the annular plate 1, and a sensitive fan blade 3, a third rotating rod 15 arranged outside the fixed plate 2, and a fourth gear 16 movably connected to the fixed plate 2. The rotation of the sensitive fan blade 3 will drive the fourth gear 16 to rotate. The rotation of the fourth gear 16 will drive the third rotating rod 15 to rotate. The rotation of the third rotating rod 15 will drive the second guiding air blade 22 to rotate. The rotation of the second guiding air blade 22 will convey the gas inside the building to the outside of the building. An auxiliary pipe 25 is arranged between the first guiding air blade 12 and the second guiding air blade 22. The second guiding air blade 22 exhausts air outwards. The upward air flow generated when the second guiding air blade 22 rotates will pass through the auxiliary pipe 25 to assist the first guiding air blade 12 to rotate and supply air.

[0031] The upper part of the fixed plate 2 is rotatably connected to the sensitive fan blade 3. A first gear 4 is fixedly connected to the outer side of the sensitive fan blade 3. The rotation of the sensitive fan blade 3 will drive the first gear 4 to rotate.

[0032] The outer side of the fixed plate 2 is rotatably connected to the first rotating rod 5. The upper part of the first rotating rod 5 is fixedly connected to the second gear 6. The second gear 6 meshes with the first gear 4. The rotation of the first gear 4 will drive the second gear 6 to rotate.

[0033] One end of the first rotating rod 5 away from the second gear 6 is fixedly connected to a first bevel gear 7. The outer side of the first rotating rod 5 is movably connected to an air supply pipe 10. The air supply pipe 10 is fixedly connected to the annular plate 1. A limiting plate 11 is fixedly connected to the outer side of the air supply pipe 10. One end of the limiting plate 11 away from the air supply pipe 10 is fixedly connected to an exhaust pipe 20. The rotation of the second gear 6 will drive the first rotating rod 5 to rotate on the outer side of the air supply pipe 10. When the first rotating rod 5 rotates, it will drive the first bevel gear 7 to rotate.

[0034] The outer side of the limiting plate 11 is rotatably connected to a first transmission rod 9. One end of the first transmission rod 9 close to the first bevel gear 7 is fixedly connected to a second bevel gear 8. The second bevel gear 8 meshes with the first bevel gear 7. One end of the first transmission rod 9 away from the second bevel gear 8 is fixedly connected to a first guiding air blade 12. One end of the first guiding air blade 12 away from the first transmission rod 9 is rotatably connected to the air supply pipe 10. An air delivery pipe 24 is fixedly connected to the outer side of the air supply pipe 10. The rotation of the first transmission rod 9 will drive the first guiding air blade 12 to rotate. The first guiding air blade 12 is rotatably connected to the air supply pipe 10. The rotation of the first guiding air blade 12 will drive the gas on the outside to enter the inside of the air delivery pipe 24.

[0035] In this embodiment, the specific implementation method is that under the action of external wind force, the sensitive fan blade 3 will rotate on the upper part of the fixed plate 2. The rotation of the sensitive fan blade 3 will drive the first gear 4 to rotate. Since the first gear 4 meshes with the second gear 6, the rotation of the first gear 4 will drive the second gear 6 to rotate. The rotation of the second gear 6 will drive the first rotating rod 5 to rotate on the outside of the air supply pipe 10. While the first rotating rod 5 rotates, it will drive the first bevel gear 7 to rotate. Since the first bevel gear 7 meshes with the second bevel gear 8, the rotation of the first bevel gear 7 will drive the second bevel gear 8 to rotate. The rotation of the second bevel gear 8 will drive the first transmission rod 9 to rotate. The first transmission rod 9 will rotate on the outside of the limiting plate 11. The function of the limiting plate 11 is to connect the first transmission rod 9 and the second transmission rod 19, and the limiting plate 11 can keep the first transmission rod 9 and the second transmission rod 19 relatively stable in position. The rotation of the first transmission rod 9 will drive the first guiding wind blade 12 to rotate. The first guiding wind blade 12 is rotatably connected to the air supply pipe 10. The rotation of the first guiding wind blade 12 will drive the outside gas to enter the inside of the air delivery pipe 24, realizing the entry of the gas outside the building into the inside of the building.

[0036] Embodiment Two

[0037] As Figures 1-7 shown, based on Embodiment One, a second rotating rod 13 is rotatably connected to the upper part of the fixed plate 2. One end of the second rotating rod 13 away from the fixed plate 2 is fixedly connected to a third gear 14. The third gear 14 meshes with the first gear 4. The rotation of the first gear 4 will drive the third gear 14 to rotate. The rotation of the third gear 14 will drive the second rotating rod 13 to rotate on the upper part of the fixed plate 2.

[0038] The outside of the fixed plate 2 is rotatably connected to a third rotating rod 15. One end of the third rotating rod 15 close to the third gear 14 is fixedly connected to a fourth gear 16. The rotation direction of the third rotating rod 15 is opposite to that of the first rotating rod 5. The rotation of the fourth gear 16 will drive the third rotating rod 15 to rotate. The fourth gear 16 meshes with the third gear 14. One end of the third rotating rod 15 away from the fourth gear 16 is fixedly connected to a third bevel gear 17.

[0039] One end of the limiting plate 11 away from the first transmission rod 9 is rotatably connected to the second transmission rod 19. One end of the second transmission rod 19 close to the third bevel gear 17 is fixedly connected to a fourth bevel gear 18. The fourth bevel gear 18 meshes with the third bevel gear 17. The rotation of the third bevel gear 17 will drive the fourth bevel gear 18 to rotate. The rotation of the fourth bevel gear 18 will drive the second transmission rod 19 to rotate.

[0040] One end of the exhaust pipe 20 close to the first guiding air blade 12 is fixedly connected with a guiding cylinder 21. The inner side of the guiding cylinder 21 is rotatably connected to the second guiding air blade 22. One end of the second guiding air blade 22 away from the guiding cylinder 21 is fixedly connected to the second transmission rod 19. The rotation of the second transmission rod 19 will drive the second guiding air blade 22 to rotate inside the guiding cylinder 21.

[0041] The outer side of the guiding cylinder 21 is fixedly connected with an air extraction pipe 23. The outer side of the air extraction pipe 23 is fixedly connected to an auxiliary pipe 25. One end of the auxiliary pipe 25 away from the air extraction pipe 23 is fixedly connected to an air delivery pipe 24. The rotation of the second guiding air blade 22 will extract the air inside the auxiliary pipe 25.

[0042] In this embodiment, the specific implementation manner is that under the action of external wind force, the sensitive fan blade 3 will rotate on the upper part of the fixing plate 2. The rotation of the sensitive fan blade 3 will drive the first gear 4 to rotate. Since the first gear 4 meshes with the third gear 14, the rotation of the first gear 4 will drive the third gear 14 to rotate. The rotation of the third gear 14 will drive the second rotating rod 13 to rotate on the upper part of the fixing plate 2. Since the third gear 14 meshes with the fourth gear 16, the rotation of the third gear 14 will drive the fourth gear 16 to rotate. At this time, the rotation direction of the fourth gear 16 is opposite to the rotation direction of the second gear 6, and the rotation direction of the third rotating rod 15 is opposite to the rotation direction of the first rotating rod 5. The rotation of the fourth gear 16 will drive the third rotating rod 15 to rotate. The rotation of the third rotating rod 15 will drive the third bevel gear 17 to rotate. Since the third bevel gear 17 meshes with the fourth bevel gear 18, the rotation of the third bevel gear 17 will drive the fourth bevel gear 18 to rotate. The rotation of the fourth bevel gear 18 will drive the second transmission rod 19 to rotate. The rotation of the second transmission rod 19 will drive the second guiding air blade 22 to rotate inside the guiding cylinder 21. The rotation direction of the second guiding air blade 22 is opposite to the rotation direction of the first guiding air blade 12. When the first guiding air blade 12 rotates, it can convey the external air to the inside of the building. The rotation of the second guiding air blade 22 can convey the air inside the building to the outside, so as to realize the ventilation between the inside and outside of the building while saving energy. The function of the auxiliary pipe 25 is to assist the first guiding air blade 12 to convey the external air to the inside of the building. When the second guiding air blade 22 rotates to extract the air inside the building to the outside, the rotation of the second guiding air blade 22 will extract the air inside the auxiliary pipe 25. The auxiliary pipe 25 is communicated with the air delivery pipe 24. The flow of the air inside the auxiliary pipe 25 will drive the air inside the air delivery pipe 24 to flow downward, so the auxiliary pipe 25 will assist the external air to enter the inside of the building.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A building energy-saving ventilation device, comprising an annular plate (1) and a fixed plate (2), characterized in that: The annular plate (1) and the fixed plate (2) are fixedly connected, and the annular plate (1) and the fixed plate (2) are provided with energy-saving air supply components at the same time. The energy-saving air supply components include a first transmission rod (9) and a first guide blade (12) movably connected to the annular plate (1), and a sensitive blade (3) movably connected to the fixed plate (2), a first rotating rod (5), and a second gear (6) arranged on the upper part of the first rotating rod (5). The rotation of the sensitive blade (3) drives the second gear (6) to rotate, and the rotation of the second gear (6) drives the first transmission rod (9) to rotate, and the rotation of the first transmission rod (9) drives the first guide blade (12) to rotate, and the rotation of the first guide blade (12) transports external air to the inside of the building. The annular plate (1) and the fixed plate (2) are provided with energy-saving exhaust components, and the energy-saving exhaust components include an annular plate ( 1), a second transmission rod (19) and a second guide fan blade (22) movably connected on the fixing plate (2), a sensitive fan blade (3) movably connected on the fixing plate (2), a third rotating rod (15) and a fourth gear (16) arranged outside the fixing plate (2), the rotation of the sensitive fan blade (3) will drive the fourth gear (16) to rotate, the rotation of the fourth gear (16) will drive the third rotating rod (15) to rotate, the rotation of the third rotating rod (15) will drive the second guide fan blade (22) to rotate, the rotation of the second guide fan blade (22) will transport the gas inside the building to the outside of the building, an auxiliary pipe (25) is arranged between the first guide fan blade (12) and the second guide fan blade (22), the second guide fan blade (22) exhausts air outwards, and the upward airflow generated when the second guide fan blade (22) rotates will pass through the auxiliary pipe (25) to assist the first guide fan blade (12) to rotate and supply air.

2. A building energy-saving ventilation device according to claim 1, characterized in that: The upper part of the fixed plate (2) is rotationally connected to the sensitive blade (3), and the outer side of the sensitive blade (3) is fixedly connected to a first gear (4).

3. A building energy-saving ventilation device according to claim 1, characterized in that: The outer side of the fixed plate (2) is rotatably connected to the first rotating rod (5), the upper part of the first rotating rod (5) is fixedly connected to the second gear (6), and the second gear (6) is meshed with the first gear (4).

4. A building energy-saving ventilation device according to claim 1, characterized in that: The end of the first rotating rod (5) away from the second gear (6) is fixedly connected to the first bevel gear (7); the outer side of the first rotating rod (5) is movably connected to an air supply pipe (10); the air supply pipe (10) and the annular plate (1) are fixedly connected; the outer side of the air supply pipe (10) is fixedly connected to a limiting plate (11); and the end of the limiting plate (11) away from the air supply pipe (10) is fixedly connected to an exhaust pipe (20).

5. A building energy-saving ventilation device according to claim 4, characterized in that: The outer side of the limit plate (11) is rotatably connected to the first transmission rod (9); the end of the first transmission rod (9) close to the first bevel gear (7) is fixedly connected to the second bevel gear (8); the second bevel gear (8) and the first bevel gear (7) are meshed; the end of the first transmission rod (9) away from the second bevel gear (8) is fixedly connected to the first guide vane (12); the end of the first guide vane (12) away from the first transmission rod (9) is rotatably connected to the air supply pipe (10); and the outer side of the air supply pipe (10) is fixedly connected to the air delivery pipe (24).

6. A building energy-saving ventilation device according to claim 1, characterized in that: The upper part of the fixed plate (2) is rotatably connected to a second rotating rod (13), and one end of the second rotating rod (13) away from the fixed plate (2) is fixedly connected to a third gear (14), and the third gear (14) is meshed with the first gear (4).

7. A building energy-saving ventilation device according to claim 1, characterized in that: The outer side of the fixed plate (2) is rotatably connected to the third rotating rod (15); one end of the third rotating rod (15) close to the third gear (14) is fixedly connected to the fourth gear (16); the fourth gear (16) and the third gear (14) are meshed; and one end of the third rotating rod (15) away from the fourth gear (16) is fixedly connected to the third bevel gear (17).

8. A building energy-saving ventilation device according to claim 4, characterized in that: One end of the limit plate (11) away from the first transmission rod (9) is rotatably connected to the second transmission rod (19); one end of the second transmission rod (19) close to the third bevel gear (17) is fixedly connected to the fourth bevel gear (18); the fourth bevel gear (18) and the third bevel gear (17) are meshed.

9. A building energy-saving ventilation device according to claim 4, characterized in that: The end of the exhaust pipe (20) close to the first guide blade (12) is fixedly connected to a guide cylinder (21); the inner side of the guide cylinder (21) is rotatably connected to the second guide blade (22); and the end of the second guide blade (22) away from the guide cylinder (21) is fixedly connected to the second transmission rod (19).

10. A building energy-saving ventilation device according to claim 9, characterized in that: An exhaust pipe (23) is fixedly connected to the outside of the guide cylinder (21), the outside of the exhaust pipe (23) is fixedly connected to an auxiliary pipe (25), and one end of the auxiliary pipe (25) away from the exhaust pipe (23) is fixedly connected to an air supply pipe (24).

Images