Fresh air ventilation device and ventilation method for pig breeding

Abstract

The invention relates to the technical field of pig breeding, and discloses a fresh air ventilation device and method for pig breeding, the device comprises a support, a ventilator, a filter box, a T-shaped partition plate and two pieces of dust filter cloth, the ventilator and the filter box are fixedly installed at the upper end and the lower end of the support respectively, and the T-shaped partition plate penetrates through the filter box in a sliding mode; the filter box is provided with a T-shaped partition plate, the T-shaped partition plate divides the filter box into a fresh air filter chamber and a dirty air filter chamber, upper side blocks are fixedly installed on the two sides of the T-shaped partition plate, lower side blocks are fixedly installed on the inner wall of the fresh air filter chamber and the inner wall of the dirty air filter chamber, the dust filter cloth is fixedly installed between the upper side blocks and the lower side blocks, and a partition plate driving assembly is arranged on the support. Dust filter cloth does not need to be replaced frequently, the use cost and the maintenance workload are reduced, it is avoided that discharged air returns into the pig house, vicious circle is easily generated, and the fresh air exchange effect in the pig breeding process is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of pig breeding, and more specifically, to a fresh air ventilation device and a ventilation method for pig breeding. Background Art

[0002] Pigs are mammals belonging to the genus Sus of the family Suidae in the order Artiodactyla. They are one of the domesticated livestock by humans. Domestic pigs are a subspecies of wild boars formed after being domesticated by humans. Pigs are usually characterized by big ears, long heads, short limbs, straight noses, fat bodies, narrow waists and backs, and coarse and hard hair. During pig farming, the air inside the pig house needs to be ventilated with fresh air. When the existing fresh air ventilation equipment for pig farming is in use, the dust filter cloth inside is always fixed and stationary, which causes the dust filter cloth to easily adhere to more dust impurities, and the dust filter cloth needs to be replaced frequently, resulting in high cost and maintenance workload. In addition, the sucked air inside the pig house is not sterilized or deodorized and discharged to the outside. The discharged air is likely to produce a vicious cycle when it returns to the pig house, affecting the fresh air ventilation effect during pig farming. In view of this, we propose a fresh air ventilation device and ventilation method for pig farming. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a fresh air ventilation device and a ventilation method for pig farming to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A fresh air ventilation device for pig farming comprises a bracket, a ventilator, a filter box, a T-shaped partition and two dust filter cloths, wherein the ventilator and the filter box are fixedly mounted on the upper and lower ends of the bracket respectively, the T-shaped partition slides through the filter box, the T-shaped partition divides the filter box into a fresh air filter chamber and a dirty air filter chamber, upper side blocks are fixedly mounted on both sides of the T-shaped partition, lower side blocks are fixedly mounted on the inner walls of the fresh air filter chamber and the dirty air filter chamber, the dust filter cloth is fixedly mounted between the upper side block and the lower side block, and the filter A spring is fixedly connected between the box and the T-shaped partition, a partition driving assembly is arranged on the bracket, the dirty air inlet and the fresh air inlet of the ventilator are fixedly connected with a dirty air suction pipe and a fresh air suction pipe respectively, a fresh air duct is fixedly connected between the fresh air outlet of the ventilator and the fresh air filter chamber, a fresh air exhaust pipe is fixedly connected on the top side of the fresh air filter chamber, a dirty air duct is fixedly connected between the dirty air outlet of the ventilator and the dirty air filter chamber, a deodorization assembly is arranged on the outside of the filter box, and a sterilization assembly is arranged between the filter box and the deodorization assembly.

[0005] As a preferred technical solution of the present invention, the partition driving assembly includes a motor, a transverse shaft and an eccentric wheel, the motor is fixedly mounted on a bracket, the transverse shaft is fixedly connected to the driving end of the motor, the eccentric wheel is fixedly sleeved on the outside of the transverse shaft, and an assembly seat is fixedly mounted on the bottom end of the T-shaped partition, the assembly seat is rotatably connected to a transmission wheel through a rotating shaft, and the transmission wheel is in contact with the opposite side of the eccentric wheel.

[0006] As a preferred technical solution of the present invention, a bearing seat is fixedly installed on the surface of the bracket, and the bearing seat is rotatably connected to the end of the horizontal axis.

[0007] As a preferred technical solution of the present invention, the sterilization assembly includes a front cone and a rear cone that are fixedly connected to each other, a side pipe is fixedly connected between the dirty air filter chamber and the front cone, and a plurality of ultraviolet sterilization lamps are fixedly installed on the front cone and the rear cone at intervals.

[0008] As a preferred technical solution of the present invention, the deodorization component includes a deodorant tank and an air duct. The deodorant tank is fixedly installed on the outside of the filter box through a side frame, the air duct is fixedly connected to one end of the rear cone, the bottom end of the deodorant tank extends into the deodorant tank, and the top front side of the deodorant tank is fixedly connected to an exhaust pipe.

[0009] As a preferred technical solution of the present invention, the top rear side of the deodorant tank is fixedly connected with a dosing pipe, and the upper end of the dosing pipe is threadedly sleeved with a sealing cap.

[0010] As a preferred technical solution of the present invention, the bottom of the deodorant tank is fixedly connected to a liquid outlet pipe, and a sealing valve is provided on the liquid outlet pipe.

[0011] As a preferred technical solution of the present invention, one end of the dirty air suction pipe is fixedly connected to a first flange, and one end of the fresh air exhaust pipe is fixedly connected to a second flange.

[0012] As a preferred technical solution of the present invention, two sealing doors are symmetrically hinged on the side of the filter box, and the two sealing doors correspond to the fresh air filter chamber and the dirty air filter chamber respectively.

[0013] In order to achieve the above and other related purposes, the present invention also provides the following technical solutions: A ventilation method for pig farming, based on the above-mentioned fresh air ventilation device, comprises the following steps: SP1: Use a ventilator to suck the air in the pig house through the dirty air suction pipe and the dirty air duct to form dirty air and blow it into the dirty air filter room, and suck the outside air through the fresh air suction pipe and the fresh air duct to form fresh air and blow it into the fresh air filter room; SP2: The dust filter cloths in the fresh air filter chamber and the dirty air filter chamber are used to filter the fresh air and dirty air respectively. At the same time, the motor is used to drive the horizontal axis to rotate. The eccentric wheel that rotates eccentrically cooperates with the transmission wheel to drive the T-shaped partition to slide up and down along the filter box continuously, so that the dust filter cloth is repeatedly switched between the tight and relaxed states, thereby causing the dust impurities filtered out of the dust filter cloth to fall off and be collected at the bottom of the fresh air filter chamber and the dirty air filter chamber; SP3: The fresh air after filtering is blown into the pig house through the fresh air exhaust pipe, and the polluted air after filtering enters the front cone and the rear cone through the side pipe. The ultraviolet sterilization lamps in the front cone and the rear cone can sterilize the polluted air passing through; SP4: The sterilized polluted air is blown into the deodorant in the deodorant tank through the induced draft pipe for deodorization, and the deodorized polluted air is finally discharged to the outside through the exhaust pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses a ventilator to suck the air in the pig house through the dirty air suction pipe and the dirty air duct to form dirty air that is blown into the dirty air filter chamber, and the outside air is sucked through the fresh air suction pipe and the fresh air duct to form fresh air that is blown into the fresh air filter chamber, and the dust filter cloths in the fresh air filter chamber and the dirty air filter chamber are used to filter the fresh air and dirty air that pass through respectively, and at the same time, a motor is used to drive the horizontal axis to rotate, and the eccentrically rotating eccentric wheel cooperates with the transmission wheel to drive the T-shaped partition to continuously slide up and down along the filter box, so that the dust filter cloth is repeatedly switched between a tight state and a relaxed state, thereby prompting the dust impurities filtered out of the dust filter cloth to fall off and be collected at the lower part of the fresh air filter chamber and the dirty air filter chamber, effectively preventing the dust filter cloth from easily adhering to a large amount of dust impurities, thereby eliminating the need for frequent replacement of the dust filter cloth, and helping to reduce the use cost and maintenance workload.

[0015] The present invention allows fresh air after filtering to be blown into the pig house through the fresh air exhaust pipe, and the polluted air after filtering enters the front cone and the rear cone in sequence through the side pipe, and the ultraviolet sterilization lamps in the front cone and the rear cone can be used to sterilize the polluted air passing through, and the sterilized polluted air is blown into the deodorant in the deodorant tank through the induced draft pipe for deodorization, and the deodorized polluted air is finally discharged to the outside through the exhaust pipe, thereby avoiding the exhaust air returning to the pig house to easily cause a vicious cycle, thereby ensuring the fresh air ventilation effect in the pig breeding process.

[0016] The present invention utilizes a T-shaped partition to divide the filter box into a fresh air filter chamber and a dirty air filter chamber, so that the overall structure of the device is more compact. The two sealed doors correspond to the fresh air filter chamber and the dirty air filter chamber respectively, which is convenient for centralized cleaning of dust impurities below the fresh air filter chamber and the dirty air filter chamber at a later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a fresh air ventilation device for pig farming according to the present invention; Figure 2 This is a first cross-sectional structural schematic diagram of a fresh air ventilation device for pig farming according to the present invention; Figure 3 for Figure 2 A schematic diagram of the enlarged three-dimensional structure of part A; Figure 4 It is a second cross-sectional structural schematic diagram of a fresh air ventilation device for pig farming according to the present invention; Figure 5 This is a front view structural schematic diagram of a fresh air ventilation device for pig farming according to the present invention; Figure 6 The present invention is a schematic top view of the structure of a fresh air ventilation device for pig farming.

[0018] In the figure: 1, bracket; 101, bearing seat; 2, ventilator; 201, dirty air suction pipe; 202, dirty air duct; 203, fresh air suction pipe; 204, fresh air duct; 3, filter box; 301, fresh air exhaust pipe; 302, fresh air filter chamber; 303, dirty air filter chamber; 304, lower side block; 305, side pipe; 306, sealing door; 4, T-shaped partition; 401, spring; 402, upper side block; 403, assembly seat; 404 , rotating shaft; 405, driving wheel; 5, dust filter cloth; 6, partition drive assembly; 601, motor; 602, horizontal axis; 603, eccentric wheel; 7, sterilization assembly; 701, front cone; 702, rear cone; 703, ultraviolet sterilization lamp; 8, deodorization assembly; 801, deodorant tank; 802, induced draft duct; 803, exhaust pipe; 804, dosing pipe; 805, sealing cover; 806, liquid outlet pipe; 807, sealing valve. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “longitudinal”, “lateral”, “upper”, “lower”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] like Figures 1 to 6 As shown, the present invention provides a fresh air ventilation device for pig farming, comprising a bracket 1, a ventilator 2, a filter box 3, a T-shaped partition 4 and two dust filter cloths 5, the ventilator 2 and the filter box 3 are fixedly installed on the upper and lower ends of the bracket 1 respectively, the T-shaped partition 4 slides through the filter box 3, the T-shaped partition 4 divides the filter box 3 into a fresh air filter chamber 302 and a dirty air filter chamber 303, both sides of the T-shaped partition 4 are fixedly installed with upper side blocks 402, the inner walls of the fresh air filter chamber 302 and the dirty air filter chamber 303 are fixedly installed with lower side blocks 304, and the dust filter cloth 5 is fixedly installed between the upper side block 402 and the lower side block 304. A spring 401 is fixedly connected between the filter box 3 and the T-shaped partition 4, and a partition driving assembly 6 is arranged on the bracket 1. The partition driving assembly 6 includes a motor 601, a transverse axis 602 and an eccentric wheel 603. The motor 601 is fixedly installed on the bracket 1, and the transverse axis 602 is fixedly connected to the driving end of the motor 601. The eccentric wheel 603 is fixedly sleeved on the outside of the transverse axis 602. An assembly seat 403 is fixedly installed on the bottom end of the T-shaped partition 4. The assembly seat 403 is rotatably connected to a transmission wheel 405 through a rotating shaft 404. The spring 401 is used to make the transmission wheel 405 and the opposite sides of the eccentric wheel 603 closely contact each other.

[0022] Among them, Figure 1 and Figure 2 As shown, the dirty air inlet and the fresh air inlet of the ventilator 2 are respectively fixedly connected with a dirty air suction pipe 201 and a fresh air suction pipe 203, the fresh air outlet of the ventilator 2 and the fresh air filter chamber 302 are fixedly connected with a fresh air duct 204, the top side of the fresh air filter chamber 302 is fixedly connected with a fresh air exhaust pipe 301, the dirty air outlet of the ventilator 2 and the dirty air filter chamber 303 are fixedly connected with a dirty air duct 202, one end of the dirty air suction pipe 201 is fixedly connected with a first flange, and the first flange is used to fix the dirty air inlet 201 to the fresh air filter chamber 302. The dirty air suction pipe 201 is connected to the exhaust duct of the pig house, and one end of the fresh air exhaust pipe 301 is fixedly connected to the second flange. The fresh air exhaust pipe 301 is connected to the air intake duct of the pig house using the second flange. The ventilator 2 can be used to suck the air in the pig house through the dirty air suction pipe 201 and the dirty air duct 202 to form dirty air and blow it into the dirty air filter chamber 303. The outside air is sucked through the fresh air suction pipe 203 and the fresh air duct 204 to form fresh air and blow it into the fresh air filter chamber 302.

[0023] Among them, Figure 1 and Figure 2As shown, a deodorization component 8 is arranged on the outside of the filter box 3, and a sterilization component 7 is arranged between the filter box 3 and the deodorization component 8. The sterilization component 7 includes a front cone 701 and a rear cone 702 which are fixedly connected to each other, and a side pipe 305 is fixedly connected between the dirty air filter chamber 303 and the front cone 701. A plurality of ultraviolet sterilization lamps 703 are fixedly installed on the front cone 701 and the rear cone 702 at intervals, and the ultraviolet sterilization lamps 703 in the front cone 701 and the rear cone 702 can be used to sterilize the dirty air passing through.

[0024] Among them, Figure 2 As shown, the deodorizing component 8 includes a deodorant tank 801 and an air duct 802. The deodorant tank 801 is fixedly installed on the outside of the filter box 3 through a side frame. The air duct 802 is fixedly connected to one end of the rear cone 702. The bottom end of the deodorant tank 801 extends into the deodorant tank 801. The sterilized waste gas is blown into the deodorant in the deodorant tank 801 through the air duct 802 for deodorization. The top front side of the deodorant tank 801 is fixedly connected with an air outlet pipe 803. The deodorized waste gas is finally discharged to the outside through the air outlet pipe 803.

[0025] Among them, Figure 5 As shown, the top rear side of the deodorant tank 801 is fixedly connected with a dosing pipe 804, and the upper end of the dosing pipe 804 is threadedly sleeved with a sealing cap 805, so as to facilitate the addition of deodorant into the deodorant tank 801.

[0026] Among them, Figure 5 As shown, the bottom of the deodorant tank 801 is fixedly connected with a liquid outlet pipe 806, and a sealing valve 807 is provided on the liquid outlet pipe 806, so as to facilitate the discharge of the waste liquid in the deodorant tank 801.

[0027] Among them, Figure 4 As shown, a bearing seat 101 is fixedly installed on the surface of the bracket 1 , and the bearing seat 101 is rotatably connected to the end of the horizontal axis 602 , which is beneficial to ensure the rotational operation stability of the horizontal axis 602 .

[0028] Among them, Figure 5 As shown, the side of the filter box 3 is symmetrically hinged with two sealing doors 306, which correspond to the fresh air filter chamber 302 and the dirty air filter chamber 303 respectively, so as to facilitate the centralized cleaning of dust and impurities at the bottom of the fresh air filter chamber 302 and the dirty air filter chamber 303 at a later time.

[0029] In order to better describe the technical solution of the present invention, the present invention also provides a ventilation method for pig farming, based on the above-mentioned fresh air ventilation device, comprising the following steps: SP1: Use the ventilator 2 to suck the air in the pig house through the dirty air suction pipe 201 and the dirty air duct 202 to form dirty air and blow it into the dirty air filter chamber 303, and suck the outside air through the fresh air suction pipe 203 and the fresh air duct 204 to form fresh air and blow it into the fresh air filter chamber 302; SP2: The dust filter cloths 5 in the fresh air filter chamber 302 and the dirty air filter chamber 303 are used to filter the fresh air and the dirty air respectively. At the same time, the motor 601 is used to drive the horizontal shaft 602 to rotate. The eccentrically rotating eccentric wheel 603 cooperates with the transmission wheel 405 to drive the T-shaped partition plate 4 to slide up and down along the filter box 3 continuously, so that the dust filter cloth 5 is repeatedly switched between the tight and relaxed states, thereby causing the dust impurities filtered out of the dust filter cloth 5 to fall off and be collected at the bottom of the fresh air filter chamber 302 and the dirty air filter chamber 303; SP3: The filtered fresh air is blown into the pig house through the fresh air exhaust pipe 301, and the filtered polluted air enters the front cone 701 and the rear cone 702 through the side pipe 305. The ultraviolet sterilization lamps 703 in the front cone 701 and the rear cone 702 can sterilize the polluted air. SP4: The sterilized polluted air is blown into the deodorant in the deodorant tank 801 through the induced draft pipe 802 for deodorization, and the deodorized polluted air is finally discharged to the outside through the exhaust pipe 803.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fresh air ventilation device for pig farming, characterized in that: It comprises a bracket (1), a ventilator (2), a filter box (3), a T-shaped partition (4) and two dust filter cloths (5); The ventilator (2) and the filter box (3) are fixedly mounted on the upper and lower ends of the bracket (1), respectively; the T-shaped partition (4) slides through the filter box (3); the T-shaped partition (4) divides the filter box (3) into a fresh air filter chamber (302) and a dirty air filter chamber (303); upper side blocks (402) are fixedly mounted on both sides of the T-shaped partition (4); lower side blocks (304) are fixedly mounted on the inner walls of the fresh air filter chamber (302) and the dirty air filter chamber (303); and the dust filter cloth (5) is fixedly mounted between the upper side block (402) and the lower side block (304); A spring (401) is fixedly connected between the filter box (3) and the T-shaped partition (4); a partition driving assembly (6) is provided on the bracket (1); the dirty air inlet and the fresh air inlet of the ventilator (2) are respectively fixedly connected to a dirty air suction pipe (201) and a fresh air suction pipe (203); a fresh air duct (204) is fixedly connected between the fresh air outlet of the ventilator (2) and the fresh air filter chamber (302); a fresh air exhaust pipe (301) is fixedly connected to the top side of the fresh air filter chamber (302); a dirty air duct (202) is fixedly connected between the dirty air outlet of the ventilator (2) and the dirty air filter chamber (303); a deodorizing assembly (8) is provided on the outside of the filter box (3); and a sterilizing assembly (7) is provided between the filter box (3) and the deodorizing assembly (8).

2. The fresh air ventilation device for pig farming according to claim 1 is characterized in that: The partition drive assembly (6) comprises a motor (601), a transverse shaft (602) and an eccentric wheel (603); the motor (601) is fixedly mounted on the bracket (1); the transverse shaft (602) is fixedly connected to the driving end of the motor (601); the eccentric wheel (603) is fixedly sleeved on the outside of the transverse shaft (602); a mounting seat (403) is fixedly mounted on the bottom end of the T-shaped partition (4); the mounting seat (403) is rotatably connected to a transmission wheel (405) via a rotating shaft (404); and the transmission wheel (405) is in contact with the opposite side of the eccentric wheel (603).

3. The fresh air ventilation device for pig farming according to claim 2 is characterized in that: A bearing seat (101) is fixedly mounted on the surface of the bracket (1), and the bearing seat (101) is rotatably connected to the end of the horizontal shaft (602).

4. The fresh air ventilation device for pig farming according to claim 2 is characterized in that: The sterilization assembly (7) comprises a front cone (701) and a rear cone (702) which are fixedly connected to each other, a side pipe (305) is fixedly connected between the dirty air filter chamber (303) and the front cone (701), and a plurality of ultraviolet sterilization lamps (703) are fixedly installed at intervals on the front cone (701) and the rear cone (702).

5. The fresh air ventilation device for pig farming according to claim 4 is characterized in that: The deodorizing assembly (8) comprises a deodorizing tank (801) and an air duct (802); the deodorizing tank (801) is fixedly mounted on the outside of the filter box (3) via a side frame; the air duct (802) is fixedly connected to one end of the rear cone (702); the bottom end of the deodorizing tank (801) extends into the deodorizing tank (801); and the top front side of the deodorizing tank (801) is fixedly connected to an air outlet pipe (803).

6. The fresh air ventilation device for pig farming according to claim 5 is characterized in that: The top rear side of the deodorant tank (801) is fixedly connected to a dosing pipe (804), and the upper end of the dosing pipe (804) is threadedly sleeved with a sealing cap (805).

7. The fresh air ventilation device for pig farming according to claim 5, characterized in that: The bottom of the deodorant tank (801) is fixedly connected to a liquid outlet pipe (806), and a sealing valve (807) is provided on the liquid outlet pipe (806).

8. The fresh air ventilation device for pig farming according to claim 1, characterized in that: One end of the dirty air suction pipe (201) is fixedly connected to a first flange, and one end of the fresh air exhaust pipe (301) is fixedly connected to a second flange.

9. The fresh air ventilation device for pig farming according to claim 1, characterized in that: Two sealing doors (306) are symmetrically hinged on the sides of the filter box (3), and the two sealing doors (306) correspond to the fresh air filter chamber (302) and the dirty air filter chamber (303) respectively.

10. A ventilation method for pig farming, according to the fresh air ventilation device for pig farming according to any one of claims 1 to 9, characterized in that: The following steps are involved: SP1: The air in the pig house is sucked through the dirty air suction pipe (201) and the dirty air duct (202) by using the ventilator (2) to form dirty air and blow it into the dirty air filter chamber (303); the air outside is sucked through the fresh air suction pipe (203) and the fresh air duct (204) to form fresh air and blow it into the fresh air filter chamber (302); SP2: The dust filter cloths (5) in the fresh air filter chamber (302) and the dirty air filter chamber (303) are used to filter the fresh air and the dirty air respectively. At the same time, the motor (601) is used to drive the horizontal shaft (602) to rotate. The eccentric wheel (603) that rotates eccentrically cooperates with the transmission wheel (405) to drive the T-shaped partition plate (4) to slide up and down along the filter box (3), so that the dust filter cloth (5) is repeatedly switched between a tight state and a loose state, thereby causing the dust impurities filtered out of the dust filter cloth (5) to fall off and be collected at the bottom of the fresh air filter chamber (302) and the dirty air filter chamber (303); SP3: The fresh air after filtering is blown into the pig house through the fresh air exhaust pipe (301), and the polluted air after filtering enters the front cone (701) and the rear cone (702) in sequence through the side pipe (305), and the ultraviolet sterilization lamps (703) in the front cone (701) and the rear cone (702) can be used to sterilize the polluted air passing through; SP4: The sterilized polluted air is blown into the deodorant in the deodorant tank (801) through the induced draft pipe (802) for deodorization. The deodorized polluted air is finally discharged to the outside through the exhaust pipe (803).

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