Breeding shed air ventilation device

Abstract

The utility model relates to the technical field of breeding sheds, in particular to an air ventilation device for a breeding shed, which integrally and efficiently exhausts hot air on the top of the breeding shed through an air bellow structure, reduces use of an electric fan and noise pollution, and is good in practicability. Comprising a ventilation frame, a motor and a plurality of fan blades. The air bellow plate is horizontally installed in the air bellow in a sliding mode, an output shaft of the motor drives the reduction gearbox, the reduction gearbox drives the air bellow plate to ascend and descend in a reciprocating mode through the transmission assembly, one sides of the two air inlet one-way plates are hinged to the top wall and the bottom wall of the air bellow respectively, and the other sides of the two air outlet one-way plates are hinged to the bottom wall of the air bellow. The two air inlet one-way plates seal the first air inlet and the second air inlet of the air bellow from the inner sides respectively, one sides of the two air outlet one-way plates are hinged to the upper end face and the lower end face of the air bellow respectively, and the two air outlet one-way plates seal the first air outlet and the second air outlet from the outer sides respectively.

Description

Technical Field

[0001] The utility model relates to the technical field of breeding sheds, in particular to an air ventilation device for breeding sheds. Background Art

[0002] The breeding shed provides a place for animals to rest, and good ventilation is needed in hot weather, so a ventilation device for livestock breeding sheds is needed.

[0003] The Chinese utility model patent with application number CN202222008920.0 proposes a ventilation device for livestock breeding sheds. The device can form a complete air duct through the upper blowing fan and the first exhaust fans on both sides, which can provide sufficient ventilation for animals.

[0004] The roof and sides of the above-mentioned prior art both use fans to blow and exhaust air. In the breeding shed, hot air will gather on the top of the shed. Since the fan's air suction range is narrow, more fans need to be installed to quickly and comprehensively discharge the hot air on the roof. In addition, the high-speed rotation of the fan blades produces a lot of noise, causing noise pollution to the livestock in the breeding shed. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides an air ventilation device for a breeding shed which can efficiently discharge the hot air from the breeding shed roof as a whole through a bellows structure, thereby reducing the use of electric fans and noise pollution and having good practicality.

[0006] The utility model discloses an air ventilation device for breeding shed, comprising a ventilation frame, a motor and a plurality of fan blades, wherein the motor is installed in the ventilation frame, a plurality of fan blades are installed on the output shaft of the motor, and the plurality of fan blades are located in the motor; the utility model also comprises a bellows, a bellows plate, two air inlet one-way plates, two air outlet one-way plates, a reduction box and a transmission assembly, wherein the bellows is installed on the top of the breeding shed, a cavity is arranged inside the bellows, an air inlet one is arranged on one side of the upper end surface of the bellows, an air outlet one is arranged on the other side of the upper end surface of the bellows, an air inlet two is arranged on one side of the lower end surface of the bellows, an air outlet two is arranged on the other side of the lower end surface of the bellows, and the bellows plate is horizontally slidably arranged in the cavity of the bellows In the embodiment, a wear-resistant sealing ring is arranged between the edge of the bellows plate and the inner wall of the bellows, the output shaft of the motor is transmission-connected to the input end of the reduction box, the output end of the reduction box is transmission-connected to the bellows plate through a transmission assembly, the transmission assembly drives the bellows plate to reciprocate and rise and fall, one side of the two air inlet one-way plates are respectively hinged on the top wall and the bottom wall of the bellows, the two air inlet one-way plates can only be opened toward the inside of the cavity of the bellows, the two air inlet one-way plates respectively close the air inlet port 1 and the air inlet port 2 of the bellows from the inside, one side of the two air outlet one-way plates are respectively hinged on the upper end face and the lower end face of the bellows, the two air outlet one-way plates can only be opened toward the outside of the bellows, Two one-way air outlet plates respectively close the air outlet 1 and the air outlet 2 from the outside; the two ventilation frames are relatively installed on both sides of the breeding shed, the bellows is longitudinally installed on the top of the breeding shed, and the bellows covers the entire roof of the shed, the air outlet 1 and the air outlet 2 are connected with the outside of the breeding shed through pipelines, and the motor drives the multiple fan blades to rotate, so that the multiple fan blades form a side air duct to ventilate the breeding shed, and at the same time, the output shaft of the motor drives the reduction box, the output shaft of the reduction box drives the transmission assembly, and the transmission assembly drives the bellows plate to reciprocate and rise and fall in the cavity of the bellows. When the bellows plate rises, the bellows plate pushes the air in the upper part of the cavity of the bellows When the fan rises, the air presses the one-way air inlet plate above to close the air inlet one, and pushes the one-way air outlet plate above to be discharged through the air outlet one. At the same time, the cavity of the bellows below the bellows plate forms a negative pressure, so that the hot air on the top of the breeding shed pushes the one-way air inlet plate below to enter the cavity of the bellows below the bellows plate through the air inlet two. Similarly, when the bellows plate descends, the air is discharged through the air outlet two, thereby realizing the overall efficient discharge of the hot air on the roof of the breeding shed, reducing the use of electric fans, low cost of use, reducing the noise of fan blades, and reducing the noise pollution caused to livestock in the breeding shed, with good practicality.

[0007] Preferably, two filter plates are also included, which are respectively installed on the outside of the first air inlet and the second air inlet of the bellows; the two filter plates filter the hot air entering the bellows to prevent impurities in the air from entering the bellows and causing wear, thereby improving reliability.

[0008] Preferably, the reduction box includes gear one, an inner ring gear, a planetary wheel carrier and multiple gear twos, gear one is installed on the middle front side of the inner ring gear through a rotating shaft to rotate concentrically, the rotating shaft of gear one is coaxially connected to the output shaft of the motor, the inner ring gear is installed on the ventilation frame through a bracket, the planetary wheel carrier is located on the rear side of the inner ring gear, multiple gear twos are installed on the planetary wheel carrier for circular rotation, the inner sides of the multiple gear twos are meshed with gear one, the outer sides of the multiple gear twos are meshed with the inner ring gear, a driving shaft is concentrically arranged on the outer side of the planetary wheel carrier, and the driving shaft is connected to the bellows plate through a transmission assembly; the output shaft of the motor drives gear one to rotate, gear one meshes with the multiple gear twos to rotate, the outer sides of the multiple gear twos mesh with the inner ring gear to drive the planetary wheel carrier to rotate, and the planetary wheel carrier drives the driving shaft to rotate, thereby realizing a planetary reduction effect, with a compact structure and good reduction effect.

[0009] Preferably, the transmission assembly includes a rocker arm, a connecting rod and a push plate, the inner end of the rocker arm is connected to the driving shaft of the planetary wheel carrier, the outer end of the rocker arm is rotatably connected to the lower end of the connecting rod, the upper end of the connecting rod is rotatably connected to the lower end of the push plate, and the upper end of the push plate passes through the bottom of the bellows and is connected to the bellows plate; the driving shaft of the planetary wheel carrier drives the rocker arm to rotate, and the rocker arm drives the push plate to move back and forth up and down through the connecting rod, so that the push plate drives the bellows plate to move up and down. The technology is mature and the structure is simple. By setting two or more groups of reduction gearboxes and transmission assemblies, large-span overall exhaust can be achieved.

[0010] Preferably, a filter screen is also included, and the filter screen is installed on the ventilation frame; the filter screen is used to intercept impurities and animal hair in the air, thereby improving the reliability and working efficiency of the motor.

[0011] Preferably, it also includes two baffles and multiple push rods, one side of the two baffles is horizontally hinged on the rear end face of the ventilation frame, the two baffles close the rear end face of the ventilation frame, one end of the multiple push rods is rotatably connected to the ventilation frame, and the other ends of the multiple push rods are respectively rotatably connected to the two baffles; the multiple push rods telescopically support the two baffles to open or close, adjust the exhaust port size and ventilation efficiency of the ventilation frame, close the ventilation frame at low temperatures, and achieve thermal insulation effect.

[0012] Preferably, it also includes multiple small baffles 1 and multiple small baffles 2, multiple small exhaust outlets 1 are arranged on the upper baffle, and the upper sides of the multiple small baffles 1 are respectively hinged to the upper sides of the multiple small exhaust outlets 1, and multiple small exhaust outlets 2 are arranged on the lower baffle, and the upper sides of the multiple small baffles 2 are respectively hinged to the upper sides of the multiple small exhaust outlets 2; when the two baffles close the exhaust outlets of the ventilation frame, the small exhaust outlets 1 and the small exhaust outlets 2 on the two baffles can be opened to perform limited ventilation, which has good practicality.

[0013] Compared with the prior art, the utility model has the following beneficial effects: two ventilation frames are relatively installed on both sides of the breeding shed, the bellows is longitudinally installed on the top of the breeding shed, and the bellows covers the entire roof, the air outlet 1 and the air outlet 2 are connected with the outside of the breeding shed through pipelines, the motor drives the multiple fan blades to rotate, so that the multiple fan blades form a side air duct to ventilate the breeding shed, and at the same time the output shaft of the motor drives the reduction box, the output shaft of the reduction box drives the transmission assembly, the transmission assembly drives the bellows plate to reciprocate and rise and fall in the cavity of the bellows, when the bellows plate rises, the bellows plate pushes the air in the upper part of the cavity of the bellows to rise, The air presses the upper air inlet one-way plate to close the air inlet one, and pushes the upper air outlet one-way plate to be discharged through the air outlet one. At the same time, the cavity of the bellows below the bellows plate forms a negative pressure, so that the hot air on the top of the breeding shed pushes the lower air inlet one-way plate to enter the cavity of the bellows below the bellows plate through the air inlet two. Similarly, when the bellows plate descends, the air is discharged through the air outlet two, thereby realizing the overall efficient discharge of the hot air on the top of the breeding shed, reducing the use of electric fans, low cost, and reducing the noise of fan blades, thereby reducing the noise pollution caused to livestock in the breeding shed, and having good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a rear axonometric structural schematic diagram of the utility model;

[0016] Figure 3 It is a schematic diagram of the side section structure of the utility model;

[0017] Figure 4 It is a front structural schematic diagram of the utility model;

[0018] Figure 5 yes Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0019] Figure 6 It is a structural diagram of the motor, fan blades, reduction gearbox and other structures in a disassembled state.

[0020] Markings in the attached drawings: 1. ventilation frame; 2. motor; 3. fan blades; 4. bellows; 5. bellows plate; 6. air inlet one-way plate; 7. air outlet one-way plate; 8. filter plate; 9. gear one; 10. inner ring gear; 11. planetary gear carrier; 12. gear two; 13. rocker arm; 14. connecting rod; 15. push plate; 16. filter screen; 17. baffle; 18. push rod; 19. small baffle one; 20. small baffle two. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0022] Example 1

[0023] like Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, the air ventilation device for a breeding shed includes a ventilation frame 1, a motor 2 and a plurality of fan blades 3, the motor 2 is installed in the ventilation frame 1, a plurality of fan blades 3 are installed on the output shaft of the motor 2, and the plurality of fan blades 3 are located in the motor 2; it also includes a bellows 4, a bellows plate 5, two air inlet one-way plates 6, two air outlet one-way plates 7, a reduction box and a transmission assembly, the bellows 4 is installed on the top of the breeding shed, a cavity is arranged inside the bellows 4, an air inlet 1 is arranged on one side of the upper end surface of the bellows 4, an air outlet 1 is arranged on the other side of the upper end surface of the bellows 4, an air inlet 2 is arranged on one side of the lower end surface of the bellows 4, an air outlet 2 is arranged on the other side of the lower end surface of the bellows 4, and the bellows plate 5 is arranged to slide horizontally. It is installed in the cavity of the bellows 4, and a wear-resistant sealing ring is arranged between the edge of the bellows plate 5 and the inner wall of the bellows 4. The output shaft of the motor 2 is transmission-connected to the input end of the reduction box, and the output end of the reduction box is transmission-connected to the bellows plate 5 through a transmission assembly, and the transmission assembly drives the bellows plate 5 to reciprocate and rise and fall. One side of the two air inlet one-way plates 6 is respectively hinged on the top wall and the bottom wall of the bellows 4, and the two air inlet one-way plates 6 can only be opened to the inside of the cavity of the bellows 4. The two air inlet one-way plates 6 respectively close the air inlet port 1 and the air inlet port 2 of the bellows 4 from the inside, and one side of the two air outlet one-way plates 7 is respectively hinged on the upper end face and the lower end face of the bellows 4. 7 can only be opened to the outside of the bellows 4, and two air outlet one-way plates 7 respectively close the air outlet 1 and the air outlet 2 from the outside; it also includes two filter plates 8, and the two filter plates 8 are respectively installed on the outside of the air inlet 1 and the outside of the air inlet 2 of the bellows 4; the reduction box includes a gear 1 9, an inner gear ring 10, a planetary wheel carrier 11 and a plurality of gears 2 12, the gear 1 9 is installed on the middle front side of the inner gear ring 10 through a rotating shaft, the rotating shaft of the gear 1 9 is coaxially connected with the output shaft of the motor 2, the inner gear ring 10 is installed on the ventilation frame 1 through a bracket, the planetary wheel carrier 11 is located on the rear side of the inner gear ring 10, and multiple gears 2 are installed on the planetary wheel carrier 11 for circumferential rotation. Gear 2 12, the inner sides of multiple gears 2 12 are meshed with gear 1 9, the outer sides of multiple gears 2 12 are meshed with the inner gear ring 10, the outer side of the planetary wheel carrier 11 is concentrically arranged with a drive shaft, and the drive shaft is connected to the bellows plate 5 through a transmission assembly; the transmission assembly includes a rocker arm 13, a connecting rod 14 and a push plate 15, the inner end of the rocker arm 13 is connected to the drive shaft of the planetary wheel carrier 11, the outer end of the rocker arm 13 is rotatably connected to the lower end of the connecting rod 14, the upper end of the connecting rod 14 is rotatably connected to the lower end of the push plate 15, and the upper end of the push plate 15 passes through the bottom of the bellows 4 and is connected to the bellows plate 5; it also includes a filter screen 16, and the filter screen 16 is installed on the ventilation frame 1.

[0024] Two ventilation frames 1 are relatively installed on both sides of the breeding shed, and the bellows 4 is longitudinally installed on the top of the breeding shed, and the bellows 4 covers the entire roof. The air outlet 1 and the air outlet 2 are connected to the outside of the breeding shed through pipelines. The motor 2 drives the multiple fan blades 3 to rotate, so that the multiple fan blades 3 form a side air duct to ventilate the breeding shed. At the same time, the output shaft of the motor 2 drives the gear 1 9 to rotate, and the gear 1 9 meshes with the multiple gear 2 12 to rotate. The outer sides of the multiple gear 2 12 mesh with the inner gear ring 10 to drive the planetary wheel carrier 11 to rotate, and the planetary wheel carrier 11 drives the driving shaft to rotate. The driving shaft of the planetary wheel carrier 11 drives the rocker arm 13 to rotate, and the rocker arm 13 drives the push plate 15 to move back and forth up and down through the connecting rod 14, so that the push plate 15 drives the bellows plate 5 to reciprocate and rise and fall in the cavity of the bellows 4. When the bellows plate 5 rises, the bellows plate 5 pushes the bellows 4 The air in the upper part of the cavity rises, so that the air presses the upper air inlet one-way plate 6 to close the air inlet port 1, and pushes the upper air outlet one-way plate 7 to be discharged through the air outlet port 1. At the same time, the cavity of the bellows 4 below the bellows plate 5 forms a negative pressure, so that the hot air on the top of the breeding shed pushes the lower air inlet one-way plate 6 to enter the cavity of the bellows 4 below the bellows plate 5 through the air inlet port 2. Similarly, when the bellows plate 5 descends, the air is discharged through the air outlet port 2, thereby realizing the overall efficient discharge of the hot air on the top of the breeding shed, reducing the use of electric fans, low use cost, reducing the noise of the fan blades, and reducing the noise pollution caused to the livestock in the breeding shed. The two filter plates 8 filter the hot air entering the bellows 4 to prevent impurities in the air from entering the bellows 4 and causing wear, and the impurities and animal hair in the air are intercepted by the filter net 16.

[0025] Example 2

[0026] like Figure 2 and Figure 3 As shown, it also includes two baffles 17 and multiple push rods 18, one side of the two baffles 17 is horizontally hinged on the rear end surface of the ventilation frame 1, the two baffles 17 close the rear end surface of the ventilation frame 1, one end of the multiple push rods 18 is rotatably connected to the ventilation frame 1, and the other ends of the multiple push rods 18 are rotatably connected to the two baffles 17 respectively; it also includes multiple small baffles 19 and multiple small baffles 20, a plurality of small exhaust vents 1 are arranged on the upper baffle 17, the upper sides of the multiple small baffles 19 are respectively hinged to the upper sides of the multiple small exhaust vents 1, and a plurality of small exhaust vents 2 are arranged on the lower baffle 17, the upper sides of the multiple small baffles 20 are respectively hinged to the upper sides of the multiple small exhaust vents 2.

[0027] A plurality of push rods 18 telescopically support the two baffles 17 to open or close, adjust the size of the exhaust port and the ventilation efficiency of the ventilation frame 1, close the ventilation frame 1 at low temperatures to achieve a heat preservation effect, and when the two baffles 17 close the exhaust port of the ventilation frame 1, by opening a plurality of small baffles 19 or a plurality of small baffles 20, the small exhaust port 1 and the small exhaust port 2 on the two baffles 17 are allowed to perform limited ventilation.

[0028] like Figures 1 to 6 As shown, the air ventilation device for breeding shed of the utility model, when it is working, first at high temperature, the motor 2 drives the multiple fan blades 3 to rotate, so that the multiple fan blades 3 form a side air duct to ventilate the breeding shed, and then the output shaft of the motor 2 drives the gear 1 9 to rotate, the gear 1 9 meshes with the multiple gear 2s 12 to rotate, the outer sides of the multiple gear 2s 12 mesh with the inner gear ring 10 to drive the planetary wheel carrier 11 to rotate, the planetary wheel carrier 11 drives the driving shaft to rotate, the driving shaft of the planetary wheel carrier 11 drives the rocker arm 13 to rotate, the rocker arm 13 drives the push plate 15 to reciprocate up and down through the connecting rod 14, the push plate 15 drives the bellows plate 5 to reciprocate in the cavity of the bellows 4, and when the bellows plate 5 rises, the bellows plate 5 pushes the air of the bellows 4 The air in the upper part of the cavity rises, so that the air presses the air inlet one-way plate 6 located above to close the air inlet 1, and pushes the air outlet one-way plate 7 located above to be discharged through the air outlet 1. The cavity of the bellows 4 located below the bellows plate 5 forms a negative pressure, so that the hot air on the top of the breeding shed pushes the air inlet one-way plate 6 located below to enter the cavity of the bellows 4 below the bellows plate 5 through the air inlet 2. Then, when the bellows plate 5 descends, the air is discharged through the air outlet 2. Finally, when the temperature is low, multiple push rods 18 are extended to support the two baffles 17 to close the exhaust port of the ventilation frame 1. By opening multiple small baffles 19 or multiple small baffles 20, the small exhaust port 1 and the small exhaust port 2 on the two baffles 17 can be ventilated limitedly.

[0029] The main functions achieved by this utility model are:

[0030] 1. The bellows structure is used to efficiently discharge the hot air from the roof of the breeding shed, reducing the use of electric fans and noise pollution;

[0031] 2. Adjust the size of the exhaust vent and ventilation efficiency;

[0032] 3. When the temperature is low, provide limited ventilation through small exhaust vents.

[0033] The installation method, connection method or setting method of the breeding shed air ventilation device of the utility model are all common mechanical methods, and can be implemented as long as they can achieve their beneficial effects; the ventilation frame 1, motor 2, fan blades 3, bellows 4, bellows plate 5, filter plate 8, gear one 9, inner ring 10, planetary gear carrier 11, gear two 12, filter screen 16, and push rod 18 of the breeding shed air ventilation device of the utility model are purchased on the market, and technical personnel in the industry only need to install and operate them according to the accompanying instruction manual, without the need for technical personnel in this field to pay creative labor.

[0034] All technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An air ventilation device for a breeding shed, comprising a ventilation frame (1), a motor (2) and a plurality of fan blades (3), wherein the motor (2) is installed in the ventilation frame (1), the plurality of fan blades (3) are installed on an output shaft of the motor (2), and the plurality of fan blades (3) are located in the motor (2); characterized in that: It also includes a bellows (4), a bellows plate (5), two air inlet one-way plates (6), two air outlet one-way plates (7), a reduction box and a transmission assembly. The bellows (4) is installed on the top of the breeding shed. A cavity is arranged inside the bellows (4). An air inlet is arranged on one side of the upper end surface of the bellows (4). An air outlet is arranged on the other side of the upper end surface of the bellows (4). An air inlet is arranged on one side of the lower end surface of the bellows (4). An air outlet is arranged on the other side of the lower end surface of the bellows (4). An air inlet is arranged on one side of the lower end surface of the bellows (4). An air outlet is arranged on the other side of the lower end surface of the bellows (4). The bellows plate (5) is horizontally slidably installed in the cavity of the bellows (4). A wear-resistant sealing ring is arranged between the edge of the bellows plate (5) and the inner wall of the bellows (4). The output shaft of the motor (2) is transmission-connected to the input end of the reduction box. Then, the output end of the reduction gearbox is connected to the bellows plate (5) through a transmission component, and the transmission component drives the bellows plate (5) to rise and fall reciprocally. One side of the two air inlet one-way plates (6) is respectively hinged on the top wall and the bottom wall of the bellows (4). The two air inlet one-way plates (6) can only be opened toward the inside of the cavity of the bellows (4). The two air inlet one-way plates (6) respectively close the air inlet port 1 and the air inlet port 2 of the bellows (4) from the inside. One side of the two air outlet one-way plates (7) is respectively hinged on the upper end surface and the lower end surface of the bellows (4). The two air outlet one-way plates (7) can only be opened toward the outside of the bellows (4). The two air outlet one-way plates (7) respectively close the air outlet port 1 and the air outlet port 2 from the outside.

2. The breeding shed air ventilation device according to claim 1, characterized in that: It also includes two filter plates (8), which are respectively installed on the outer side of the first air inlet and the outer side of the second air inlet of the wind box (4).

3. The breeding shed air ventilation device according to claim 1, characterized in that: The reduction box comprises a gear 1 (9), an inner gear ring (10), a planetary wheel carrier (11) and a plurality of gear 2 (12); the gear 1 (9) is coaxially rotatably mounted on the middle front side of the inner gear ring (10) via a rotating shaft; the rotating shaft of the gear 1 (9) is coaxially transmission-connected with the output shaft of the motor (2); the inner gear ring (10) is mounted on the ventilation frame (1) via a bracket; the planetary wheel carrier (11) is located at the rear side of the inner gear ring (10); a plurality of gear 2 (12) is circumferentially rotatably mounted on the planetary wheel carrier (11); the inner sides of the plurality of gear 2 (12) are meshed with the gear 1 (9); the outer sides of the plurality of gear 2 (12) are meshed with the inner gear ring (10); a drive shaft is coaxially arranged on the outer side of the planetary wheel carrier (11); and the drive shaft is transmission-connected with the bellows plate (5) via a transmission assembly.

4. The breeding shed air ventilation device according to claim 3, characterized in that: The transmission assembly comprises a rocker arm (13), a connecting rod (14) and a push plate (15); the inner end of the rocker arm (13) is connected to the driving shaft of the planetary wheel carrier (11); the outer end of the rocker arm (13) is rotatably connected to the lower end of the connecting rod (14); the upper end of the connecting rod (14) is rotatably connected to the lower end of the push plate (15); and the upper end of the push plate (15) passes through the bottom of the bellows (4) and is connected to the bellows plate (5).

5. The breeding shed air ventilation device according to claim 1, characterized in that: It also includes a filter screen (16), which is mounted on the ventilation frame (1).

6. The breeding shed air ventilation device according to claim 1, characterized in that: It also includes two baffles (17) and a plurality of push rods (18), one side of the two baffles (17) being horizontally hinged on the rear end surface of the ventilation frame (1), the two baffles (17) closing the rear end surface of the ventilation frame (1), one end of the plurality of push rods (18) being rotatably connected to the ventilation frame (1), and the other ends of the plurality of push rods (18) being rotatably connected to the two baffles (17), respectively.

7. The breeding shed air ventilation device according to claim 6, characterized in that: It also includes a plurality of small baffles (19) and a plurality of small baffles (20). A plurality of small air outlets (1) are arranged on the upper baffle (17), and the upper sides of the plurality of small baffles (19) are respectively hinged to the upper sides of the plurality of small air outlets (1); a plurality of small air outlets (2) are arranged on the lower baffle (17), and the upper sides of the plurality of small baffles (20) are respectively hinged to the upper sides of the plurality of small air outlets (2).

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