Livestock house negative pressure ventilation deodorization device

Abstract

The utility model relates to the technical field of livestock ventilation, especially to a livestock house negative pressure ventilation deodorization device, which is arranged with multiple suction boxes to reduce the blockage and inhalation of turbid air by livestock, and is conducive to the smooth ventilation and the health of livestock, comprising an exhaust duct and a fan mechanism, a negative pressure chamber is arranged in the exhaust duct, an air outlet is arranged in the upper end of the exhaust duct and communicates with the negative pressure chamber, and the fan mechanism is installed in the air outlet, further comprising a gas collection tank, a joint, a connecting pipe, a suction box and a grille, the gas collection tank is installed in the middle of the exhaust duct, the inside of the gas collection tank communicates with the negative pressure chamber of the exhaust duct, multiple joints that communicate with the inside of the gas collection tank are installed on the gas collection tank, multiple connecting pipes and suction boxes are arranged, multiple suction boxes are connected with multiple joints through the connecting pipes, a collection chamber is arranged in the inside of the suction box, an air inlet is arranged on the end face of the suction box, a grille is installed on the air inlet, and multiple air inlets are arranged on the grille.

Description

Technical Field

[0001] This utility model relates to the technical field of livestock ventilation, and in particular to a negative pressure ventilation and deodorization device for livestock pens. Background Technology

[0002] Livestock pens typically use negative pressure ventilation devices to expel stale air and bring in fresh air, creating an internal and external air circulation system for ventilation and deodorization. Chinese utility model patent CN221615867U discloses a ventilation device for livestock pens. This device includes an exhaust duct with a fan mechanism for generating negative pressure airflow installed at its upper part. The bottom of the exhaust duct is connected to the pen. The middle of the exhaust duct extends vertically and has multiple rows of water distribution pipes installed along its height, with nozzles mounted on the water distribution pipes. This device effectively removes lint and fibers from the airflow exiting the pen, requiring minimal and troublesome maintenance, and is labor-saving and convenient to use.

[0003] However, the air inlets of the aforementioned ventilation equipment are directly installed on the air ducts. Since the air ducts are installed on the outside of the livestock pen walls, the air inlets are generally fixed on the inside walls of the livestock pen and cannot be flexibly arranged inside the livestock pen. Therefore, the air inside the livestock pen needs to travel a long path to reach the air inlets. During the flow of this turbid air, it is easily blocked or inhaled by the livestock. As a result, the closer the livestock are to the air inlets, the greater the adverse effects of the turbid air, which is not conducive to the smooth progress of ventilation and the health of the livestock. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a negative pressure ventilation and deodorization device for livestock pens that reduces the obstruction and inhalation of turbid air by livestock through the flexible arrangement of multiple air intake boxes, thereby facilitating smooth ventilation and protecting the health of livestock.

[0005] This utility model discloses a negative pressure ventilation and deodorization device for livestock pens, comprising an exhaust duct and a fan mechanism. The exhaust duct has a negative pressure chamber inside, and an air outlet communicating with the negative pressure chamber is located at the upper end of the exhaust duct. The fan mechanism is installed in the air outlet. It also includes an air collection box, connectors, connecting pipes, an air intake box, and a grille. The air collection box is installed in the middle of the exhaust duct, and its interior communicates with the negative pressure chamber of the exhaust duct. Multiple connectors communicating with the interior of the air collection box are installed on the air collection box. Multiple connecting pipes and multiple air intake boxes are provided, each connected to multiple connectors via connecting pipes. The air intake box has a collection chamber inside, and an air inlet is located on its end face. A grille with multiple air inlet holes is installed on the air inlet. The exhaust duct is vertically installed outside the livestock pen wall, and the air collection box extends through the wall into the livestock pen. The multiple air intake boxes are arranged according to… Multiple air intake boxes need to be installed inside the livestock pens, either on the floor or in the walls. These boxes are connected to multiple connectors via various pipes. The fan mechanism draws air from the negative pressure chamber of the exhaust duct through the outlet, creating negative pressure. This draws air and odors from the livestock pen into the intake boxes through multiple grilles, and then collects them in a collection box via pipes and connectors. The collected air is then fed into the negative pressure chamber of the exhaust duct and discharged. Fresh air from outside is introduced through doors and windows, achieving ventilation and deodorization. The flexible arrangement of multiple intake boxes shortens the distance that polluted air travels to be drawn into them, reducing the obstruction of polluted air by livestock and decreasing the likelihood of polluted air being inhaled by them. This promotes smooth ventilation and protects livestock health.

[0006] Preferably, it also includes a lower blocking frame, a motor, a screw, and a threaded sleeve. The lower blocking frame is vertically and retractably installed in the collection chamber of the air intake box. The lower blocking frame is located below the grille and has multiple blocking blocks on it. These blocks are used to block multiple air inlets of the grille. The motor is installed on the lower end face of the lower blocking frame. The lower end of the screw is concentrically mounted on the output shaft of the motor. The upper end of the screw passes through the lower blocking frame and is rotatably screwed to the threaded sleeve, which is installed on the grille. The motor drives the screw to rotate, and the screw and the threaded sleeve engage threadedly to rotate the screw. The mechanism moves up and down along the threaded sleeve, which in turn drives the motor to move up and down. The motor then drives the lower blocking frame to move up and down. When the lower blocking frame rises, multiple blocks on the lower blocking frame block multiple air inlets of the grille, at which point the air intake box stops sucking air. When the lower blocking frame descends, the multiple blocks on the lower blocking frame open up to the multiple air inlets of the grille, at which point air and exhaust air enter the air intake box through the multiple air inlets of the grille for ventilation and deodorization. This allows for the opening and closing of a designated air intake box, enabling targeted ventilation and deodorization of a designated area in the livestock pen, offering good flexibility.

[0007] Preferably, the fan mechanism includes a duct, a second motor, and multiple spiral blades. The upper end of the exhaust duct is tapered, making the outlet diameter smaller than the middle diameter of the exhaust duct. The duct is installed inside the outlet of the exhaust duct. A secondary ventilation channel is provided between the outer wall of the duct and the inner wall of the exhaust duct. The second motor is installed inside the duct, and multiple spiral blades are installed on the output shaft of the second motor. The operation of the second motor drives the multiple spiral blades to rotate, which outputs the air in the duct upward at high speed. This causes the air to push the air at the outlet of the exhaust duct to the outside, creating a negative pressure at the outlet. This causes the remaining air in the middle of the exhaust duct to be drawn out through the secondary ventilation channel and discharged from the outlet of the exhaust duct, thereby improving the exhaust volume and ventilation and deodorization efficiency.

[0008] Preferably, it also includes a drive shaft and multiple centrifugal blades. The lower end of the drive shaft is concentrically mounted on the output shaft of motor two, and multiple centrifugal blades are evenly mounted on the upper circumference of the drive shaft. Multiple helical blades constitute an axial flow fan impeller, and multiple centrifugal blades constitute a centrifugal fan impeller. While motor two drives multiple helical blades to rotate, it also drives the drive shaft and multiple centrifugal blades to rotate, so that the centrifugal fan impeller composed of multiple centrifugal blades centrifugally diverts the air at the outlet of the exhaust duct to the outside, further improving ventilation efficiency.

[0009] Preferably, the system also includes roller one, roller two, air filter belt, and cleaning door. An outwardly expanding air filter chamber is provided in the middle of the exhaust duct. Roller one and roller two are respectively rotatably installed on the left and right sides of the air filter chamber. The air filter belt is fitted onto roller one and roller two. A cleaning port is provided at the end of the air filter chamber of the exhaust duct. The cleaning door is hinged to the cleaning port of the exhaust duct. The air filter belt is placed horizontally in the middle of the negative pressure chamber of the exhaust duct, so that the air filter belt filters the rising air in the exhaust duct and intercepts impurities such as lint. After working for a period of time, roller one and roller two are rotated to make the air filter belt rotate, open the cleaning door, and clean the impurities intercepted on the air filter belt through the cleaning port, so that the air filter belt restores its air filtration effect.

[0010] Preferably, the system also includes a spray pipe, multiple nozzles, and a drain pipe. A water storage chamber is provided at the bottom of the exhaust duct. The spray pipe is installed in the lower part of the negative pressure chamber of the exhaust duct and is located above the air collection box. Multiple nozzles are installed on the spray pipe and are located above the water storage chamber of the exhaust duct. The drain pipe is installed on the exhaust duct, and the inlet end of the drain pipe extends into the bottom of the water storage chamber of the exhaust duct. The spray pipe is connected to an external water supply line, so that water is transported through the spray pipe and sprayed into the middle of the negative pressure chamber of the exhaust duct through the multiple nozzles. This allows the water mist to spray the turbid air input through the air collection box, flushing dust, impurities, and other hydrophilic impurities into the water storage chamber of the exhaust duct. Wastewater is discharged through the drain pipe, achieving water washing and deodorization of the air.

[0011] Preferably, it also includes an air guide plate and a reflector block. The air guide plate is installed in the middle of the negative pressure chamber of the exhaust duct. The air guide plate is located between the air collection box and the spray pipe. The air guide plate is used to guide the air input from the air collection box to the water surface. A reflector block is set on the air guide plate, and the nozzles of multiple spray heads face the reflector block. The air guide plate is used to guide the turbid air input through the air collection box to the water surface in the water storage chamber of the exhaust duct. The water mist sprayed from multiple spray heads hits the reflector block, further bounces and disperses, thereby making the water mist finer and improving the water washing deodorization efficiency.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: Since multiple air intake boxes can be flexibly arranged, the distance for turbid air to be drawn into multiple air intake boxes is shortened, the obstruction of turbid air by livestock is reduced, and the probability of turbid air being inhaled by livestock is reduced, which is conducive to the smooth progress of ventilation and the health of livestock. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a side sectional view of the present invention;

[0015] Figure 3 This is a schematic diagram of the isometric structure of this utility model;

[0016] Figure 4 It is a structural diagram of the intake box, grille, lower end bracket, motor, screw and threaded sleeve, etc.

[0017] Figure 5 It is a structural diagram of the exhaust duct and fan mechanism, etc.

[0018] Figure 6 It is a structural diagram of the exhaust duct, fan mechanism, air collection box, spray pipe, nozzle, drain pipe and air guide plate, etc.

[0019] The following are labeled in the attached diagram: 1. Exhaust duct; 2. Fan mechanism; 3. Air collection box; 4. Connector; 5. Connecting pipe; 6. Air intake box; 7. Grille; 8. Lower block frame; 9. Motor 1; 10. Screw; 11. Threaded sleeve; 12. Duct pipe; 13. Motor 2; 14. Spiral blade; 15. Drive shaft; 16. Centrifugal blade; 17. Roller 1; 18. Roller 2; 19. Air filter belt; 20. Cleaning door; 21. Spray pipe; 22. Spray head; 23. Drain pipe; 24. Air guide plate; 25. Reflector block. Detailed Implementation

[0020] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example 1

[0021] like Figures 1 to 4 As shown, a negative pressure ventilation and deodorization device for livestock pens includes an exhaust duct 1 and a fan mechanism 2. The exhaust duct 1 has a negative pressure chamber inside, and an air outlet communicating with the negative pressure chamber is located at the upper end of the exhaust duct 1. The fan mechanism 2 is installed in the air outlet. It also includes an air collection box 3, connectors 4, connecting pipes 5, an air intake box 6, and a grille 7. The air collection box 3 is installed in the middle of the exhaust duct 1, and its interior communicates with the negative pressure chamber of the exhaust duct 1. Multiple connectors 4 communicating with the interior of the air collection box 3 are installed on the air collection box 3. Multiple connecting pipes 5 and multiple air intake boxes 6 are provided. Multiple air intake boxes 6 are connected to multiple connectors 4 through connecting pipes 5. An air collection chamber is located inside the air intake box 6, and an air inlet is located on the end face of the air intake box 6. A grille 7 is installed on the air inlet, and the grille 7 has multiple air inlet holes. It also includes a lower blocking frame 8, a motor 9, a screw 10, and a threaded sleeve 11. The lower blocking frame 8... The lower block frame 8 is located below the grille 7 and is equipped with multiple blocking blocks. These blocks are used to block multiple air inlets of the grille 7. A motor 9 is installed on the lower end face of the lower block frame 8. The lower end of the screw 10 is concentrically installed on the output shaft of the motor 9. The upper end of the screw 10 passes through the lower block frame 8 and is rotatably screwed to the threaded sleeve 11. The threaded sleeve 11 is installed on the grille 7. The system also includes a roller 17, a roller 28, an air filter belt 19, and a cleaning door 20. An outwardly expanding air filter chamber is provided in the middle of the exhaust duct 1. The roller 17 and roller 28 are rotatably installed on the left and right sides of the air filter chamber, respectively. The air filter belt 19 is fitted onto the roller 17 and roller 28. A cleaning port is provided at the end of the air filter chamber of the exhaust duct 1. The cleaning door 20 is hinged to the cleaning port of the exhaust duct 1.

[0022] The exhaust duct 1 is vertically installed on the outside of the livestock pen wall. The air collection box 3 extends through the wall into the livestock pen. Multiple air intake boxes 6 are arranged in the floor or walls inside the livestock pen as needed. The multiple air intake boxes 6 are connected to multiple connectors 4 through multiple connecting pipes 5. The motor 9 drives the screw 10 to rotate. The screw 10 is threadedly engaged with the threaded sleeve 11, causing the screw 10 to rise and fall along the threaded sleeve 11, which in turn drives the motor 9 to rise and fall. The motor 9 drives the lower blocking frame 8 to rise and fall. When the lower blocking frame 8 rises, the multiple blocks of the lower blocking frame 8 block the multiple air inlets of the grille 7, and the air intake box 6 stops absorbing air. When the lower blocking frame 8 falls, the multiple blocks of the lower blocking frame 8 open the multiple air inlets of the grille 7, and air and exhaust air enter the air intake box 6 through the multiple air inlets of the grille 7 for ventilation and deodorization. This allows for the opening and closing of designated air intake boxes 6, enabling targeted ventilation and deodorization of designated areas in the livestock pen, providing good flexibility.

[0023] The operation of the fan mechanism 2 discharges the air in the negative pressure chamber of the exhaust duct 1 through the air outlet, creating a negative pressure in the negative pressure chamber of the exhaust duct 1. This draws the air and odors in the livestock pen into multiple air intake boxes 6 through the air inlets of multiple grilles 7, and collects them into the air collection box 3 through multiple connecting pipes 5 and multiple connectors 4. The collected air is then fed into the negative pressure chamber of the exhaust duct 1 and discharged. Fresh air from outside is supplied through the ventilation structures such as doors and windows on the livestock pen, achieving ventilation and deodorization. Because the multiple air intake boxes 6 can be flexibly arranged, the distance that turbid air needs to be drawn into the multiple air intake boxes 6 is shortened, reducing the obstruction of turbid air by livestock and reducing the probability of turbid air being inhaled by livestock. This is conducive to smooth ventilation and the health of livestock.

[0024] During ventilation, the air filter belt 19 is placed horizontally in the middle of the negative pressure chamber of the exhaust duct 1, so that the air filter belt 19 filters the rising air in the exhaust duct 1 and intercepts impurities such as lint. After working for a period of time, the first roller 17 and the second roller 18 are rotated to make the air filter belt 19 rotate, the cleaning door 20 is opened, and the impurities intercepted on the air filter belt 19 are cleaned off through the cleaning port, so that the air filter belt 19 restores its air filtration effect. Example 2

[0025] like Figure 1 , Figure 2 and Figure 5As shown, based on Embodiment 1, the fan mechanism 2 includes a duct 12, a second motor 13, and multiple spiral blades 14. The upper end of the exhaust duct 1 is tapered so that the diameter of the air outlet is smaller than the diameter of the middle part of the exhaust duct 1. The duct 12 is installed inside the air outlet of the exhaust duct 1. A secondary ventilation channel is provided between the outer wall of the duct 12 and the inner wall of the exhaust duct 1. The second motor 13 is installed inside the duct 12. Multiple spiral blades 14 are installed on the output shaft of the second motor 13. It also includes a drive shaft 15 and multiple centrifugal blades 16. The lower end of the drive shaft 15 is concentrically installed on the output shaft of the second motor 13. Multiple centrifugal blades 16 are evenly installed on the upper circumference of the drive shaft 15.

[0026] Multiple spiral blades 14 constitute an axial flow fan impeller, and multiple centrifugal blades 16 constitute a centrifugal fan impeller. The operation of motor 2 13 drives the multiple spiral blades 14 to rotate, which outputs the air in the duct 12 upward at high speed. At the same time as the motor 2 13 drives the multiple spiral blades 14 to rotate, it drives the drive shaft 15 and the multiple centrifugal blades 16 to rotate. This causes the centrifugal fan impeller composed of multiple centrifugal blades 16 to centrifugally divert the air at the outlet of the exhaust duct 1 to the outside. This causes the air at the outlet of the exhaust duct 1 to be pushed out to the outside, creating a negative pressure at the outlet. This causes the remaining air in the middle of the exhaust duct 1 to be sucked out through the secondary ventilation channel and discharged from the outlet of the exhaust duct 1, thereby improving the exhaust volume and ventilation and deodorization efficiency. Example 3

[0027] like Figure 1 , Figure 2 and Figure 6 As shown, based on Embodiment 1, it also includes a spray pipe 21, multiple nozzles 22, and a drain pipe 23. A water storage chamber is provided at the bottom of the exhaust duct 1. The spray pipe 21 is installed in the lower part of the negative pressure chamber of the exhaust duct 1 and is located above the air collection box 3. Multiple nozzles 22 are provided on the spray pipe 21 and are located above the water storage chamber of the exhaust duct 1. The drain pipe 23 is installed on the exhaust duct 1 and its input end extends into the bottom of the water storage chamber of the exhaust duct 1. It also includes an air guide plate 24 and a reflector block 25. The air guide plate 24 is installed in the middle of the negative pressure chamber of the exhaust duct 1 and is located between the air collection box 3 and the spray pipe 21. The air guide plate 24 is used to guide the air input from the air collection box 3 toward the water surface. A reflector block 25 is provided on the air guide plate 24 and the nozzles of the multiple nozzles 22 face the reflector block 25.

[0028] The air guide plate 24 is used to guide the turbid air input through the air collection box 3 to the water surface in the water storage chamber of the exhaust duct 1. The spray pipe 21 is connected to the external water supply pipeline, so that water is transported through the spray pipe 21 and sprayed into the middle of the negative pressure chamber of the exhaust duct 1 through multiple nozzles 22. The water mist sprayed from the multiple nozzles 22 hits the reflector block 25, further bounces and dissipates, so that the water mist is finer, so that the water mist sprays the turbid air input through the air collection box 3, and washes dust, impurities and other hydrophilic impurities into the water storage chamber of the exhaust duct 1. The sewage is discharged through the drain pipe 23, realizing the water washing and deodorization of the air.

[0029] like Figures 1 to 6 As shown, this utility model discloses a negative pressure ventilation and deodorization device for livestock pens. During operation, the exhaust duct 1 is first vertically installed on the outside of the livestock pen wall. The air collection box 3 extends through the wall into the livestock pen. Multiple air intake boxes 6 are arranged as needed in the floor or walls inside the livestock pen. These multiple air intake boxes 6 are connected to multiple connectors 4 via multiple connecting pipes 5. Then, the fan mechanism 2 operates, discharging the air in the negative pressure chamber of the exhaust duct 1 through the air outlet, creating a negative pressure in the chamber. Next, motor 9 drives the screw 10 to rotate. The screw 10 engages with the threaded sleeve 11, causing it to descend along the threaded sleeve 11. This causes motor 9 to drive the lower blocking frame 8 to descend. Multiple blocks of the lower blocking frame 8 respectively engage with the grille 7. Multiple air inlets are opened, allowing air and odors from the livestock pen to be drawn into multiple air intake boxes 6 through the air intake holes of multiple grilles 7. These air intakes are then collected into the air collection box 3 via multiple connecting pipes 5 and multiple connectors 4, and finally discharged into the negative pressure chamber of the exhaust duct 1. Fresh air from the outside is supplied through ventilation structures such as doors and windows in the livestock pen, achieving ventilation and deodorization. During the ventilation and deodorization process, the spray pipe 21 is connected to an external water supply line, allowing water to be transported through the spray pipe 21 and sprayed into the center of the negative pressure chamber of the exhaust duct 1 through multiple nozzles 22. This water mist sprays the turbid air input through the air collection box 3, flushing dust, impurities, and other hydrophilic impurities into the water storage chamber of the exhaust duct 1. Wastewater is then discharged through the drain pipe 23.

[0030] The main functions achieved by this utility model are:

[0031] 1. Multiple air intake boxes 6 can be flexibly arranged, thereby shortening the distance that turbid air is drawn into multiple air intake boxes 6, reducing the obstruction of turbid air by livestock, and reducing the chance of turbid air being inhaled by livestock, which is conducive to smooth ventilation and livestock health.

[0032] 2. It can open and close the designated air intake box 6, thereby focusing on ventilation and deodorization of designated areas in livestock pens, with good flexibility;

[0033] 3. The fan mechanism 2 adopts a combination of axial flow impeller and centrifugal impeller to improve ventilation volume;

[0034] 4. It has a water-washing and deodorizing function.

[0035] This utility model discloses a negative pressure ventilation and deodorization device for livestock pens. Its installation, connection, or setting methods are all common mechanical methods, and any method that can achieve its beneficial effect can be implemented. The exhaust pipe 1, fan mechanism 2, connecting pipe 5, air intake box 6, grille 7, motor 1 9, screw 10, threaded sleeve 11, culvert 12, motor 2 13, spiral blade 14, drive shaft 15, centrifugal blade 16, roller 1 17, roller 2 18, air filter belt 19, spray pipe 21, and spray head 22 of this utility model's negative pressure ventilation and deodorization device for livestock pens are all commercially available. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0036] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A negative pressure ventilation and deodorization device for livestock pens, comprising an exhaust duct (1) and a fan mechanism (2), wherein a negative pressure chamber is provided inside the exhaust duct (1), an air outlet communicating with the negative pressure chamber is provided at the upper end of the exhaust duct (1), and the fan mechanism (2) is installed in the air outlet; characterized in that, It also includes an air collection box (3), a connector (4), a connecting pipe (5), an air intake box (6), and a grille (7). The air collection box (3) is installed in the middle of the exhaust duct (1). The interior of the air collection box (3) is connected to the negative pressure chamber of the exhaust duct (1). Multiple connectors (4) connected to the interior of the air collection box (3) are installed on the air collection box (3). Multiple connecting pipes (5) and air intake boxes (6) are provided. Multiple air intake boxes (6) are connected to multiple connectors (4) through connecting pipes (5). The interior of the air intake box (6) is provided with a collection chamber. An air inlet is provided on the end face of the air intake box (6). A grille (7) is installed on the air inlet. The grille (7) is provided with multiple air inlets.

2. The negative pressure ventilation and deodorization device for livestock pens as described in claim 1, characterized in that, It also includes a lower blocking frame (8), a motor (9), a screw (10), and a threaded sleeve (11). The lower blocking frame (8) is installed in the collection chamber of the air intake box (6) in a height-adjustable manner. The lower blocking frame (8) is located below the grille (7). Multiple blocking blocks are provided on the lower blocking frame (8). The multiple blocking blocks are used to block the multiple air inlets of the grille (7) respectively. The motor (9) is installed on the lower end face of the lower blocking frame (8). The lower end of the screw (10) is concentrically installed on the output shaft of the motor (9). The upper end of the screw (10) passes through the lower blocking frame (8) and is rotatably screwed to the threaded sleeve (11). The threaded sleeve (11) is installed on the grille (7).

3. The negative pressure ventilation and deodorization device for livestock pens as described in claim 1, characterized in that, The fan mechanism (2) includes a duct (12), a second motor (13) and multiple spiral blades (14). The upper end of the exhaust pipe (1) is tapered so that the diameter of the air outlet is smaller than the diameter of the middle part of the exhaust pipe (1). The duct (12) is installed inside the air outlet of the exhaust pipe (1). A secondary ventilation channel is set between the outer wall of the duct (12) and the inner wall of the exhaust pipe (1). The second motor (13) is installed inside the duct (12). Multiple spiral blades (14) are installed on the output shaft of the second motor (13).

4. The negative pressure ventilation and deodorization device for livestock pens as described in claim 3, characterized in that, It also includes a drive shaft (15) and multiple centrifugal blades (16). The lower end of the drive shaft (15) is concentrically mounted on the output shaft of motor 2 (13), and multiple centrifugal blades (16) are evenly mounted on the upper circumference of the drive shaft (15).

5. The negative pressure ventilation and deodorization device for livestock pens as described in claim 1, characterized in that, It also includes roller one (17), roller two (18), air filter belt (19) and cleaning door (20). An air filter chamber that expands outward is provided in the middle of the exhaust duct (1). Roller one (17) and roller two (18) are respectively installed on the left and right sides of the air filter chamber. The air filter belt (19) is fitted on roller one (17) and roller two (18). A cleaning port is provided at the end of the air filter chamber of the exhaust duct (1). The cleaning door (20) is hinged to the cleaning port of the exhaust duct (1).

6. The negative pressure ventilation and deodorization device for livestock pens as described in claim 1, characterized in that, It also includes a spray pipe (21), multiple nozzles (22) and a drain pipe (23). A water storage chamber is set at the bottom of the exhaust pipe (1). The spray pipe (21) is installed in the lower part of the negative pressure chamber of the exhaust pipe (1). The spray pipe (21) is located above the air collection box (3). Multiple nozzles (22) are set on the spray pipe (21). The multiple nozzles (22) are located above the water storage chamber of the exhaust pipe (1). The drain pipe (23) is installed on the exhaust pipe (1). The input end of the drain pipe (23) extends into the bottom of the water storage chamber of the exhaust pipe (1).

7. The negative pressure ventilation and deodorization device for livestock pens as described in claim 6, characterized in that, It also includes a guide plate (24) and a reflector (25). The guide plate (24) is installed in the middle of the negative pressure chamber of the exhaust duct (1). The guide plate (24) is located between the air collection box (3) and the spray pipe (21). The guide plate (24) is used to guide the air input from the air collection box (3) towards the water surface. The reflector (25) is set on the guide plate (24), and the nozzles of multiple nozzles (22) face the reflector (25).

Images