Fresh air system with double-stage purification function

Abstract

This invention relates to the field of fresh air system technology, specifically to a fresh air system with dual-stage purification function. Its features include an air supply device, a primary activated carbon filter module, and a secondary activated carbon layer. The air supply device contains the primary activated carbon filter module. Multiple secondary activated carbon layers are arranged within leather drying lines, each corresponding to a specific piece of leather hanging on the line. The air supply device directs the clean air, initially adsorbed by the primary activated carbon filter module, through an outlet duct to the leather drying lines. The secondary activated carbon layers, spaced apart from the corresponding pieces of leather, are arranged along the direction of clean air flow and are used for secondary adsorption of the flowing clean air. This invention, through its dual-stage purification design, significantly reduces the concentration of volatile organic compounds in the drying environment, effectively reducing odor contamination of the hanging leather and optimizing the odor of the finished leather from the source, thus effectively improving the quality of the leather's aroma.

Description

Technical Field

[0001] This invention relates to the field of fresh air system technology, specifically to a fresh air system with dual-stage purification function. Background Technology

[0002] As people's living standards gradually improve, cars have gradually entered the homes of ordinary people. The smell of leather in the car is the most direct information that consumers feel after entering the car, and its quality has a serious impact on consumers' evaluation. In recent years, consumer complaints about the smell of leather in the car have been increasing year by year. In order to solve the problem of consumer complaints about the smell of leather, improve the market competitiveness of products, and protect the physical and mental health of consumers, it is necessary to optimize the smell performance of finished leather from the source to ensure the quality of leather.

[0003] In the processing of leather, it is usually necessary to hang the leather to dry in order to facilitate the next step of processing. However, the concentration of volatile organic compounds in the air in the existing hanging workshop is relatively high, which cannot guarantee the cleanliness of the air in contact with the leather. The volatile organic compounds in the air can easily cause odor contamination of the leather during hanging, and cannot optimize the odor performance of the finished leather from the source. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a fresh air system with dual-stage purification function that can significantly reduce the concentration of volatile organic compounds in the hanging environment through a dual-stage purification design, effectively reduce the odor contamination of leather during hanging, optimize the odor performance of finished leather from the source, and effectively improve the odor quality of leather.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a fresh air system with dual-stage purification function, including an air supply device, a primary activated carbon filter module, and a secondary activated carbon layer. The air supply device contains the primary activated carbon filter module, and the secondary activated carbon layer consists of multiple layers disposed within the leather drying line, each corresponding to a specific piece of leather hanging on the drying line. The air supply device directs the clean air, which has been preliminarily adsorbed by the primary activated carbon filter module, to the leather drying line via an outlet duct. The secondary activated carbon layer and the corresponding leather are aligned along the clean air... The airflow direction is arranged sequentially at intervals for secondary adsorption of flowing clean air. The air supply device includes a housing with a return air inlet and an air outlet on each end face. Inside the housing, from the return air inlet side to the air outlet side, there are sequentially arranged a return air zone, an exhaust air zone, a fresh air zone, a physical filtration zone, a chemical filtration zone, a heating zone, and an air outlet zone. The return air zone is equipped with a return air fan, the physical filtration zone is equipped with physical filter plates, the chemical filtration zone is equipped with a primary activated carbon filter module, the heating zone is equipped with a steam coil, and the air outlet zone is equipped with an air outlet fan. The top surface of the housing is connected to the exhaust air zone. The enclosure includes an exhaust valve and a fresh air valve connected to the fresh air area. A first partition separates the exhaust and fresh air areas, and a return air valve connects the two areas. The leather drying rack includes an exhaust hood, a return air hood, and a main frame. The exhaust and return air hoods are spaced apart, forming a clean air flow zone between them. The main frame is located within this clean air flow zone. The exhaust hood has a first vent and an exhaust chamber opening towards the main frame. An exhaust pipe connects to the exhaust vent and the first vent. The exhaust hood has an exhaust chamber... An air distribution plate is installed at the opening, with several air distribution holes evenly distributed on the air distribution plate. The return air hood is provided with a second ventilation port and has a return air chamber that opens to one side of the main frame. The second ventilation port is connected to the return air port through a return air delivery pipe. The main frame is provided with multiple rows of hanging areas arranged at intervals along the direction of clean air flow. Each hanging area is provided with multiple hanging mechanisms that are spaced apart and used to hang and dry leather. The hanging mechanisms in adjacent rows of hanging areas are staggered. The secondary activated carbon layer is detachably installed on a fixed frame, and the upper end of the fixed frame is fixedly connected to the second crossbeam of the main frame.

[0006] Furthermore, a second partition is fixedly installed in the return air zone of the enclosure, forming a first maintenance zone between the return air inlet and the second partition. A second maintenance zone is provided inside the enclosure between the physical filtration zone and the chemical filtration zone. A third partition is fixedly installed in the air outlet zone of the enclosure, forming a third maintenance zone between the heating zone and the third partition. The air inlet of the return air fan is connected to the first maintenance zone, and the air inlet of the air outlet fan is connected to the second maintenance zone. Maintenance doors are provided on the front surface of the enclosure at the return air zone, exhaust air zone, fresh air zone, second maintenance zone, third maintenance zone, and air outlet zone.

[0007] Furthermore, the suspension mechanism includes a suspension shaft and a suspension plate. A bending rod is fixedly provided on one side of the upper end of the suspension plate. The upper end of the suspension shaft is connected to the first crossbeam of the main frame, and the lower end of the suspension shaft is fixedly connected to the bending rod. The suspension plate has a strip-shaped opening along its length for the leather to pass through. Multiple spaced clamps are detachably installed on the upper edge of the leather. The upper surface of the suspension plate has a positioning groove that corresponds to each clamp. The clamps are adapted to the positioning grooves and can be separably embedded in the positioning grooves.

[0008] Furthermore, the upper end of the suspension shaft passes upward through the first crossbeam and is rotatably connected to it through the first bearing. The main frame is provided with a synchronous swing drive mechanism for driving multiple suspension plates in the same row of suspension areas to swing back and forth synchronously. The synchronous swing drive mechanism includes a drive motor, a rotating plate, a connecting rod, a sliding plate, a rack, and gears. The drive motor is fixedly mounted on the fixed plate, which is fixedly mounted on the main frame. The motor shaft of the drive motor is fixedly mounted with the rotating plate. An eccentric shaft is mounted on one side surface of the rotating plate at an eccentric position. One end of the connecting rod is rotatably connected to the eccentric shaft, and the other end of the connecting rod is rotatably connected to the fixed shaft. The fixed shaft is fixedly mounted on one end of the sliding plate. The sliding plate is slidably connected to the upper end of the corresponding first crossbeam through a sliding assembly. A rack is fixedly mounted on the upper surface of the sliding plate, and a gear is fixedly mounted on the top of the suspension shaft. The rack meshes with multiple gears in the corresponding row of suspension areas for transmission.

[0009] Furthermore, the secondary activated carbon layer includes a concave arc-shaped segment and two inclined straight segments. The two inclined straight segments are symmetrically arranged and fixed on the left and right sides of the concave arc-shaped segment, respectively. The concave arc-shaped segment and the two inclined straight segments enclose a semi-enclosed cavity. The opening of the semi-enclosed cavity gradually increases from the inside to the outside, and the height of the semi-enclosed cavity is not less than the height of the leather.

[0010] Furthermore, a connecting plate is provided on the side of the two inclined straight segments away from the concave arc segment and between the connecting plate and the fixed frame. One side edge of the connecting plate is fixed on the fixed frame. An air guide cavity is formed between the inclined straight segment and the corresponding connecting plate. Multiple vertically arranged air guide plates are fixed on the inner surface of the two inclined straight segments. The air guide plates are used to make the clean air that has been adsorbed by the secondary activated carbon layer flow toward the leather surface.

[0011] Furthermore, vertically arranged air supply pipes are fixedly installed on the opposite side of the two connecting plates away from the fixed frame. The air supply pipes have an upward-opening air supply cavity. Vertically arranged strip-shaped air outlet slits that communicate with the air supply cavity are provided on the outer circumference of the air supply pipes. The top opening of the air supply pipe is connected to one end of the connecting pipe. The connecting pipe is fixedly connected to the second crossbeam. The other ends of multiple connecting pipes located in the same row of suspension areas are all connected to the air supply branch pipes. One end of the air supply branch pipes in multiple rows of suspension areas is connected to the main air supply pipe. One end of the main air supply pipe is connected to the air outlet delivery pipe. The clean air in the air supply pipes will be sprayed out from the strip-shaped air outlet slits and form an air curtain on the leather side.

[0012] Furthermore, the secondary activated carbon layer includes a stainless steel frame and fibrous activated carbon filter cotton. Multiple spaced vertical rods are fixedly installed inside the stainless steel frame. The side rods of the stainless steel frame are connected to and covered with fibrous activated carbon filter cotton between adjacent vertical rods and between two adjacent vertical rods. Multiple air guide plates are correspondingly set and fixedly connected to multiple vertical rods on the inclined straight section. The stainless steel frame can be detachably connected between two make-up air pipes.

[0013] As described above, the fresh air system with dual-stage purification function provided by the present invention has the following beneficial effects: By setting a primary activated carbon filter module in the air supply device, the introduced outdoor air can be initially adsorbed to remove most of the volatile organic compounds in the air and achieve primary coarse filtration. Subsequently, the clean air that has undergone primary adsorption is directed to the leather drying line. By setting a secondary activated carbon layer in the leather drying line, during the leather hanging process, the clean air that has undergone primary adsorption will first pass through the secondary activated carbon layer to capture any trace amounts of volatile organic compounds that may remain in the clean air, thus achieving secondary fine filtration. Then, the clean air that has undergone secondary adsorption comes into contact with the leather surface. Through the dual-stage purification design of the primary activated carbon filter module and the secondary activated carbon layer, the air quality can be greatly improved. This method significantly reduces the concentration of volatile organic compounds (VOCs) in the leather drying environment, ensuring the cleanliness of the air in contact with the leather. The flowing clean air effectively replaces odors released by the leather itself and minimizes odor contamination of the leather during hanging. This ensures that each piece of leather undergoes critical processes in a clean environment, thereby optimizing the odor of the finished leather from the source and effectively improving its odor quality. Furthermore, by embedding a secondary activated carbon layer inside the leather drying line and using a unique one-to-one arrangement between the secondary activated carbon layer and each piece of leather, clean air is directed to each piece. The flowing clean air accelerates the volatilization and replacement of leather odors, shortening the deodorization cycle, improving production efficiency, and preventing the spread of odors in the workshop, effectively improving the drying environment of the leather drying line. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the fresh air system with dual-stage purification function according to the present invention.

[0015] Figure 2 This is a schematic diagram of the air supply device.

[0016] Figure 3 A three-dimensional structural diagram of a leather drying rack.

[0017] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0018] Figure 5 for Figure 3 A magnified view of a portion of point B in the middle.

[0019] Figure 6 A top view of a leather drying line.

[0020] Figure 7 This is a three-dimensional structural diagram of the secondary activated carbon layer installed on a fixed frame.

[0021] Figure 8 This is a schematic diagram of the structure of the secondary activated carbon layer installed on the fixed frame.

[0022] Figure 9 This is a three-dimensional structural diagram of the suspension plate and the bending rod.

[0023] In the diagram: 1-Air supply unit; 11-Casing; 1111-Return air inlet; 1112-Air outlet; 112-Return air zone; 113-Exhaust air zone; 114-Fresh air zone; 115-Physical filtration zone; 116-Chemical filtration zone; 117-Heating zone; 118-Air outlet zone; 1191-First maintenance zone; 1192-Second maintenance zone; 1193-Third maintenance zone; 12-Return air fan; 13-Physical filter plate; 14-Steam coil; 15- 161 - Exhaust fan; 162 - Fresh air valve; 163 - Return air valve; 171 - First partition; 172 - Second partition; 173 - Third partition; 18 - Inspection door; 2 - Primary activated carbon filter module; 3 - Secondary activated carbon layer; 31 - Concave arc section; 32 - Inclined straight section; 33 - Semi-enclosed cavity; 34 - Air guide cavity; 35 - Air guide plate; 36 - Stainless steel frame; 361 - Vertical rod; 37 - Fibrous activated carbon filter cotton ; 4-Leather drying line; 41-Exhaust hood; 411-First vent; 42-Return hood; 421-Second vent; 43-Main frame; 431-First crossbeam; 432-Second crossbeam; 44-Air distribution plate; 45-Suspension mechanism; 451-Suspension shaft; 452-Suspension plate; 4521-Strip through-hole; 4522-Positioning groove; 453-Bending rod; 454-Clamping block; 46-Synchronous swing drive mechanism; 461-Drive motor; 4 62-Rotating plate; 4621-Eccentric shaft; 463-Connecting rod; 464-Sliding plate; 4641-Fixed shaft; 465-Rack; 466-Gear; 467-Fixed plate; 468-Sliding assembly; 5-Leather; 6-Outlet air supply duct; 7-Fixed frame; 71-Connecting plate; 72-Make-up air duct; 721-Make-up air cavity; 722-Strip outlet air gap; 81-Connecting pipe; 82-Supply air branch pipe; 83-Supply air main pipe; 9-Return air supply duct. Detailed Implementation

[0024] The present invention will be further described below through specific embodiments.

[0025] like Figures 1 to 9 As shown, the fresh air system with dual-stage purification function of the present invention includes an air supply device 1, a primary activated carbon filter module 2, and a secondary activated carbon layer 3. The air supply device 1 is equipped with the primary activated carbon filter module 2. The secondary activated carbon layer 3 consists of multiple layers disposed within a leather drying line 4 and corresponds one-to-one with multiple pieces of leather 5 suspended within the leather drying line 4. The air supply device 1 is used to directionally transport the clean air, which has been initially adsorbed by the primary activated carbon filter module 2, to the leather drying line 4 through an air outlet pipe 6. The secondary activated carbon layer 3 and the corresponding leather 5 are sequentially spaced along the flow direction of the clean air and are used to perform secondary adsorption on the flowing clean air.

[0026] The air supply device 1 is located at the top of the drying workshop, and the leather drying line 4 is located inside the drying workshop and below the air supply device 1. The air supply device 1 contains a primary activated carbon filter module 2, which performs preliminary adsorption treatment on the introduced outdoor air to remove most of the volatile organic compounds (VOCs) and achieve primary coarse filtration. The pre-adsorbed clean air is then directed to the leather drying line 4. A secondary activated carbon layer 3 is installed within the leather drying line 4. During the hanging and drying of the leather 5, the pre-adsorbed clean air passes through the secondary activated carbon layer 3, allowing for secondary capture of any remaining trace VOCs, achieving secondary fine filtration. The second-stage adsorbed clean air then contacts the surface of the leather 5. Through the dual-stage purification design of the primary activated carbon filter module 2 and the secondary activated carbon layer 3, the air can achieve further purification. Significantly reducing the concentration of volatile organic compounds in the hanging environment of the leather drying line 4 effectively ensures the cleanliness of the clean air in contact with the leather 5 within the leather drying line 4. The flowing clean air effectively replaces the odors released by the leather 5 itself and reduces odor contamination of the leather 5 during hanging. This ensures that each piece of leather 5 completes key processes in a clean environment, thereby optimizing the odor performance of the finished leather 5 from the source and effectively improving its odor quality. Furthermore, by embedding the secondary activated carbon layer 3 inside the leather drying line 4 and employing a special arrangement where the secondary activated carbon layer 3 corresponds one-to-one with each piece of leather 5, clean air is directionally delivered to each piece of leather 5. The flowing clean air accelerates the volatilization and replacement of odors from the leather 5, shortening the deodorization cycle of the leather 5 during hanging, improving production efficiency, and preventing the spread of odors in the workshop, effectively improving the hanging environment of the leather drying line 4.

[0027] Accordingly, the primary activated carbon filtration module 2 can be a product from the existing technology.

[0028] The air supply device 1 includes a housing 11. The housing 11 has a return air inlet 1111 and an air outlet 1112 on its two end faces. Inside the housing 11, from the return air inlet 1111 to the air outlet 1112, are sequentially arranged a return air zone 112, an exhaust air zone 113, a fresh air zone 114, a physical filtration zone 115, a chemical filtration zone 116, a heating zone 117, and an air outlet zone 118. A return air fan 12 is installed in the return air zone 112, and a physical filter plate 13 is installed in the physical filtration zone 115. The chemical filtration zone 116... The enclosure includes a primary activated carbon filter module 2, a steam coil 14 in the heating zone 117, an exhaust fan 15 in the air outlet zone 118, an exhaust valve 161 connected to the exhaust zone 113 and a fresh air valve 162 connected to the fresh air zone 114 on the top surface of the enclosure 11, a first partition 171 between the exhaust zone 113 and the fresh air zone 114 in the enclosure 11, and a return air valve 163 for connecting the exhaust zone 113 and the fresh air zone 114 on the first partition 171.

[0029] By coordinating the opening of the exhaust valve 161, the fresh air valve 162, and the return air valve 163, fresh outdoor air is introduced into the fresh air zone 114 through the fresh air valve 162. Driven by the air outlet fan 15, it sequentially passes through the material filtration zone, the chemical filtration zone 116, the heating zone 117, and the air outlet zone 118, and is then directionally transported from the air outlet 1112 to the leather drying line 4 through the air outlet conveying pipe 6. In addition, driven by the return air fan 12, indoor air is transported using return air. Pipe 9 passes through the return air inlet 1111 and sequentially through the return air zone 112 and the exhaust air zone 113. In one of the working modes, the air in the exhaust air zone 113 can be discharged through the exhaust air valve 161 or recovered through the return air valve 163. In addition, a high-efficiency heat recovery device can be installed between the exhaust air pipe connected to the exhaust air valve 161 and the fresh air pipe connected to the fresh air valve 162. Thus, before the exhausted indoor air leaves, it will exchange energy with the incoming fresh air to recover the cold or heat, and pre-cool or preheat the fresh air.

[0030] First, large particles of dander and dust in the air are intercepted by the physical filter plate 13, and then enter the primary activated carbon filter module 2. This avoids large particles of impurities clogging the pores of the activated carbon, ensures the adsorption efficiency of the primary activated carbon filter module 2, extends the replacement cycle, and also reduces the load on the secondary activated carbon layer 3 at the back end, thus greatly improving the overall stability of the dual-stage purification.

[0031] The steam coil 14 can heat the air passing through it according to seasonal needs. The housing 11 can be made of color-coated steel plate and galvanized steel plate. The physical filter plate 13 can be a product of existing technology. Its filter material is chemical fiber, which can effectively intercept large particulate pollutants such as dust and industrial dust larger than 5μm. It can filter out microorganisms such as bacteria and viruses carried in the air, and can also adsorb harmful gases such as formaldehyde and benzene. In addition, the exhaust valve 161, the fresh air valve 162 and the return air valve 163 are all manually controlled. By changing the valve opening, the air volume can be adjusted and the airflow direction can be controlled. Preferably, the return air fan 12 and the exhaust air fan 15 are both volute-less blowers, which are the core air supply components.

[0032] Furthermore, a second partition 172 is fixedly installed in the return air zone 112 of the housing 11, forming a first maintenance area 1191 between the return air inlet 1111 and the second partition 172. A second maintenance area 1192 is provided within the housing 11 between the physical filtration zone 115 and the chemical filtration zone 116. A third partition 173 is fixedly installed in the air outlet zone 118 of the housing 11, forming a third maintenance area 1193 between the heating zone 117 and the third partition 173. The return air... The air inlet of the fan 12 is connected to the first maintenance area 1191, and the air inlet of the outlet fan 15 is connected to the second maintenance area 1192. The front surface of the housing 11 is provided with maintenance doors 18 at the return air area 112, the exhaust air area 113, the fresh air area 114, the second maintenance area 1192, the third maintenance area 1193, and the outlet air area 118, respectively. This provides a good maintenance space, making it easy to access various areas inside the housing 11 and to carry out precise maintenance.

[0033] The leather drying rack 4 includes an air outlet hood 41, a return air hood 42, and a main frame 43. The air outlet hood 41 and the return air hood 42 are spaced apart, forming a clean air flow zone between them. The main frame 43 is located within the clean air flow zone. The air outlet hood 41 has a first ventilation opening 411 and an air outlet cavity opening towards one side of the main frame 43. The air outlet delivery pipe 6 is connected to the air outlet 1112 and the first ventilation opening 411. An air distribution plate 44 is installed on the air outlet hood 41 at the opening of the air outlet cavity. The air distribution plate 44 is evenly distributed with several air distribution holes. The return air cover 42 is provided with a second ventilation port 421 and has a return air cavity that opens towards one side of the main frame 43. The second ventilation port 421 is connected to the return air port 1111 through the return air conveying pipe 9. The main frame 43 is provided with multiple rows of hanging areas arranged at intervals along the direction of clean air flow. Each hanging area is provided with multiple hanging mechanisms 45 that are spaced apart and used to hang and dry the leather 5. The hanging mechanisms 45 in adjacent rows of hanging areas are staggered.

[0034] By spacing the air outlet hood 41 and the return air hood 42, a complete clean air flow zone is formed between them. Clean air is directionally delivered from the air outlet cavity and rectified by the air distribution plate 44 to ensure uniform airflow. Then, the clean air passes through the clean air flow zone and the leather 5 and is directly collected by the return air cavity and sent back to the air supply device 1 for re-purification or discharge. This forms a flow path of air supply, flow, return, re-purification or discharge, which can effectively ensure that the leather 5 is always surrounded by flowing clean air, greatly accelerating the dehumidification and deodorization of the leather 5 and shortening the drying cycle. In addition, by staggering the hanging mechanisms 45 in adjacent rows of hanging areas, the leather 5 in adjacent rows of hanging areas can be staggered, which helps to improve space utilization and ventilation uniformity, allowing the leather 5 in the rear row to obtain a more uniform airflow.

[0035] The suspension mechanism 45 includes a suspension shaft 451 and a suspension plate 452. A bending rod 453 is fixedly provided on one side of the upper end of the suspension plate 452. The upper end of the suspension shaft 451 is connected to the first crossbeam 431 of the main frame 43, and the lower end of the suspension shaft 451 is fixedly connected to the bending rod 453. A strip-shaped through-hole 4521 for the leather 5 to pass through is provided on the suspension plate 452 along its length. A plurality of spaced clamps 454 are detachably installed on the upper edge of the leather 5. The end face is provided with positioning grooves 4522 that correspond one-to-one with the clamping blocks 454. The clamping blocks 454 are adapted to the positioning grooves 4522 and can be separably embedded in the positioning grooves 4522, thereby effectively ensuring the stability of the leather 5 when it is hung to dry, and making it fully unfolded and evenly stressed. It also facilitates the quick loading and unloading of the leather 5 onto the hanging plate 452. In addition, the clamping block 454 includes two side blocks, which are connected by screws to clamp and fix the leather 5 to the upper side edge.

[0036] Furthermore, the upper end of the suspension shaft 451 passes upward through the first crossbeam 431 and is rotatably connected to it via the first bearing. The main frame 43 is provided with a synchronous swing drive mechanism 46 for driving multiple suspension plates 452 in the same row of suspension areas to swing back and forth synchronously. The synchronous swing drive mechanism 46 includes a drive motor 461, a rotating plate 462, a connecting rod 463, a sliding plate 464, a rack 465, and a gear 466. The drive motor 461 is fixedly mounted on a fixed plate 467, which is fixedly mounted on the main frame 43. The motor shaft of the drive motor 461 is fixedly mounted with the rotating plate 462. One side surface of the rotating plate 462 is offset from the side surface. An eccentric shaft 4621 is installed at the center. One end of the connecting rod 463 is rotatably connected to the eccentric shaft 4621, and a second bearing may be provided between them. The other end of the connecting rod 463 is rotatably connected to the fixed shaft 4641, and a third bearing may be provided between them. The fixed shaft 4641 is fixedly installed at one end of the sliding plate 464. The sliding plate 464 is slidably connected to the upper end of the corresponding first crossbeam 431 through a sliding assembly 468. The rack 465 is fixedly installed on the upper surface of the sliding plate 464. The gear 466 is fixedly installed on the top of the suspension shaft 451. The rack 465 and multiple gears 466 in a corresponding row of the suspension area are all meshed and driven.

[0037] By controlling the rotation of the drive motor 461, the rotating plate 462 can be rotated. Then, driven by the connecting plate and guided by the sliding component 468, the circular motion of the eccentric shaft 4621 can be converted into the linear motion of the fixed shaft 4641, thereby driving the sliding plate 464 to move back and forth. This, in turn, drives the rack 465 to move back and forth synchronously. Simultaneously, through the meshing transmission between the rack 465 and the gear 466, the gear 466 can be driven to rotate back and forth, thereby driving the suspension shaft 451 to rotate back and forth synchronously, and ultimately driving the suspension plate... 452 swings back and forth, thereby causing multiple leathers 5 in the same row of the hanging area to swing back and forth synchronously in the clean air flow area. This dynamically changes the windward position of the leathers 5 and makes the leathers 5 continuously stretch due to the swing, so as to eliminate ventilation dead corners as much as possible. This allows all parts of the surface of the leathers 5 to come into better contact with clean air. During the swing of the leathers 5, the boundary layer airflow on the surface of the leathers 5 is constantly disturbed, so that the odors and moisture originally attached to the surface of the leathers 5 can be removed more quickly and carried away by the airflow. This helps to improve the dehumidification and deodorization speed and shorten the hanging cycle.

[0038] Furthermore, by adjusting the eccentric distance of the eccentric shaft 4621 on the rotating plate 462, the sliding stroke of the sliding plate 464 can be flexibly adjusted, thereby adjusting the swing amplitude of the suspension plate 452. Specifically, a plurality of adjusting threaded holes are provided radially on one side surface of the rotating plate 462, and an adjusting stud is fixedly provided at the center of one end face of the eccentric shaft 4621. By threading the adjusting stud of the eccentric shaft 4621 into the adjusting threaded holes at different positions, the eccentric distance of the eccentric shaft 4621 on the rotating plate 462 can be adjusted.

[0039] Correspondingly, multiple sliding components 468 are arranged at intervals. Each sliding component 468 includes a slider, a slide rail, and a limiting block. The slide rail is fixedly installed on the upper end face of the first crossbeam 431, and the slider is fixedly installed on the lower end of the sliding plate 464. The slider is adapted to the slide rail and the two slide in a sliding fit. The limiting block is fixedly provided on both ends of the slide rail on the upper end face of the first crossbeam 431, thereby realizing the sliding connection between the sliding plate 464 and the first crossbeam 431, effectively ensuring the stability and smoothness of the sliding plate 464 when sliding.

[0040] In addition, the left-right reciprocating swing angle of the suspension plate 452 is no greater than 10 degrees.

[0041] The secondary activated carbon layer 3 includes a concave arc-shaped segment 31 and two inclined straight segments 32. The two inclined straight segments 32 are symmetrically arranged and fixed on the left and right sides of the concave arc-shaped segment 31, respectively. The concave arc-shaped segment 31 and the two inclined straight segments 32 together form a semi-enclosed cavity 33. The concave arc-shaped segment 31 can effectively guide and converge clean air and guide clean air through the concave arc-shaped segment 31. The opening of the semi-enclosed cavity 33 gradually increases from the inside to the outside. The height of the semi-enclosed cavity 33 is not less than the height of the leather 5, thereby completely covering the leather 5. The secondary activated carbon layer 3 is detachably installed on the fixing frame 7. The upper end of the fixing frame 7 is fixedly connected to the second crossbeam 432 of the main frame 43. In addition, the two inclined straight segments 32 are located away from the concave arc-shaped segment 31. A connecting plate 71 is provided between one side edge of the inclined straight section 31 and the fixing frame 7. One side edge of the connecting plate 71 is fixed to the fixing frame 7. An air guide cavity 34 is formed between the inclined straight section 32 and the corresponding connecting plate 71. The air guide cavity 34 can effectively guide clean air through the inclined straight section 32 to effectively increase the air volume passing through the secondary activated carbon layer 3. Multiple vertically arranged air guide plates 35 are fixed on the inner surface of the two inclined straight sections 32. The air guide plates 35 are used to make the clean air that has been adsorbed by the secondary activated carbon layer 3 flow towards the surface of the leather 5. This can ensure that all the clean air blown towards the leather 5 has been deeply purified by the secondary activated carbon layer 3, so as to better ensure the realization of the dual-stage purification function.

[0042] Preferably, the depth of the semi-enclosed cavity 33 is 0.25-0.35 times the width of the leather 5.

[0043] Vertically arranged air supply pipes 72 are fixedly installed on the two connecting plates 71 on the side away from the fixed frame 7. Each air supply pipe 72 has an upward-opening air supply cavity 721. A vertically arranged strip-shaped air outlet slit 722 communicating with the air supply cavity 721 is provided on the outer circumference of each air supply pipe 72. The top opening of each air supply pipe 72 is connected to one end of a connecting pipe 81, which is fixedly connected to the second crossbeam 432. The other ends of multiple connecting pipes 81 located in the same row of the suspension area are connected to air supply branch pipes 82. One end of each air supply branch pipe 82 in multiple rows of the suspension area is connected to a main air supply pipe 83, which is connected to the air outlet conveying pipe 6. The air supply pipe 72 contains... Clean air will be ejected from the strip-shaped air outlet 722 and form an air curtain on one side of the leather 5. The formation of the air curtain can play a corresponding isolation role, so as to better isolate the air in the workshop from the processing area of ​​the leather 5, and to isolate the processing areas of two adjacent leather 5. In addition, with the setting of the semi-enclosed cavity 33, it can better surround the leather 5, so as to better ensure that each leather 5 is surrounded by clean air that has been adsorbed twice. At the same time, the fast-flowing airflow can also effectively remove the odor and moisture emitted by the leather 5 itself. In addition, it can effectively supplement the air in the corresponding rear suspension area, so as to effectively ensure that the rear suspension area receives sufficient processing air volume.

[0044] The secondary activated carbon layer 3 includes a stainless steel frame 36 and fibrous activated carbon filter cotton 37. Multiple spaced vertical rods 361 are fixedly installed within the stainless steel frame 36. The fibrous activated carbon filter cotton 37 covers the side rods of the stainless steel frame 36 with adjacent vertical rods 361 and between adjacent vertical rods 361. Multiple air guide plates 35 are correspondingly and fixedly connected to the multiple vertical rods 361 on the inclined straight section 32. The stainless steel frame 36 is detachably connected between the two air supply pipes 72, effectively balancing filtration efficiency, structural strength, and ease of installation and maintenance. The fibrous activated carbon filter cotton 37 has a large specific surface area, higher adsorption efficiency, good air permeability, lower wind resistance, and facilitates airflow passage. Correspondingly, the stainless steel frame 36 and the air supply pipes 72 are connected by snap-fit ​​or screws to achieve a detachable connection, thus facilitating the disassembly and replacement of the secondary activated carbon layer 3.

[0045] The above are merely some specific embodiments of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be considered as infringing upon the protection scope of the present invention.

Claims

1. A fresh air system with dual-stage purification function, characterized in that: The system includes an air supply device, a primary activated carbon filter module, and secondary activated carbon layers. The air supply device contains the primary activated carbon filter module. Multiple secondary activated carbon layers are arranged within the leather drying line, each corresponding to a specific piece of leather hanging on the line. The air supply device directs the clean air, initially adsorbed by the primary activated carbon filter module, through an outlet duct to the leather drying line. The secondary activated carbon layers, spaced apart from the corresponding pieces of leather, are arranged along the airflow direction to perform secondary adsorption on the flowing clean air. The enclosure includes a housing with a return air inlet and an air outlet on each of its two end faces. Inside the housing, from the return air inlet side to the air outlet side, are sequentially arranged a return air zone, an exhaust air zone, a fresh air zone, a physical filtration zone, a chemical filtration zone, a heating zone, and an air outlet zone. The return air zone contains a return air fan; the physical filtration zone contains a physical filter plate; the chemical filtration zone contains a primary activated carbon filter module; the heating zone contains a steam coil; and the air outlet zone contains an air outlet fan. The top surface of the housing has an exhaust air valve connected to the exhaust air zone and a fresh air valve connected to the fresh air zone. A first partition is provided between the exhaust area and the fresh air area. The first partition has a return air valve for connecting the exhaust area and the fresh air area. The leather drying rack includes an exhaust hood, a return air hood, and a main frame. The exhaust hood and the return air hood are spaced apart, forming a clean air flow zone between them. The main frame is located within the clean air flow zone. The exhaust hood has a first vent and an exhaust chamber opening towards one side of the main frame. The exhaust delivery pipe is connected to the exhaust vent and the first vent. A wind distribution plate is installed on the exhaust hood at the opening of the exhaust chamber. The air distribution plate is evenly distributed with several air distribution holes. The return air hood is provided with a second vent and has a return air cavity that opens towards one side of the main frame. The second vent is connected to the return air vent through a return air delivery pipe. The main frame is provided with multiple rows of hanging areas arranged at intervals along the direction of clean air flow. Each hanging area is provided with multiple hanging mechanisms that are spaced apart and used to hang and dry the leather. The hanging mechanisms in adjacent rows of hanging areas are staggered. The secondary activated carbon layer is detachably installed on a fixed frame. The upper end of the fixed frame is fixedly connected to the second crossbeam of the main frame.

2. The fresh air system with dual-stage purification function according to claim 1, characterized in that: A second partition is fixedly installed in the return air zone of the housing, forming a first maintenance area between the return air inlet and the second partition. A second maintenance area is provided in the housing between the physical filtration zone and the chemical filtration zone. A third partition is fixedly installed in the air outlet zone of the housing, forming a third maintenance area between the heating zone and the third partition. The air inlet of the return air fan is connected to the first maintenance area, and the air inlet of the air outlet fan is connected to the second maintenance area. Maintenance doors are provided on the front surface of the housing at the return air zone, the exhaust air zone, the fresh air zone, the second maintenance area, the third maintenance area, and the air outlet zone.

3. The fresh air system with dual-stage purification function according to claim 1, characterized in that: The suspension mechanism includes a suspension shaft and a suspension plate. A bending rod is fixedly provided on one side of the upper end of the suspension plate. The upper end of the suspension shaft is connected to the first crossbeam of the main frame, and the lower end of the suspension shaft is fixedly connected to the bending rod. The suspension plate has a strip-shaped opening along its length for the leather to pass through. Multiple spaced clamps are detachably installed on the upper edge of the leather. The upper surface of the suspension plate has positioning grooves that correspond one-to-one with the clamps. The clamps are adapted to the positioning grooves and can be separably embedded in the positioning grooves.

4. The fresh air system with dual-stage purification function according to claim 3, characterized in that: The upper end of the suspension shaft passes upward through the first crossbeam and is rotatably connected to it via the first bearing. The main frame is provided with a synchronous swing drive mechanism for driving multiple suspension plates in the same row of suspension areas to swing back and forth synchronously. The synchronous swing drive mechanism includes a drive motor, a rotating plate, a connecting rod, a sliding plate, a rack, and a gear. The drive motor is fixedly mounted on a fixed plate, which is fixedly mounted on the main frame. The rotating plate is fixedly mounted on the motor shaft of the drive motor. An eccentric shaft is mounted eccentrically on one side surface of the rotating plate. One end of the connecting rod is rotatably connected to the eccentric shaft, and the other end of the connecting rod is rotatably connected to the fixed shaft. The fixed shaft is fixedly mounted on one end of the sliding plate. The sliding plate is slidably connected to the upper end of the corresponding first crossbeam via a sliding assembly. The rack is fixedly mounted on the upper surface of the sliding plate, and the gear is fixedly mounted on the top of the suspension shaft. The rack meshes with multiple gears in the corresponding row of suspension areas.

5. The fresh air system with dual-stage purification function according to claim 1, characterized in that: The secondary activated carbon layer includes a concave arc-shaped segment and two inclined straight segments. The two inclined straight segments are symmetrically arranged and fixed on the left and right sides of the concave arc-shaped segment, respectively. The concave arc-shaped segment and the two inclined straight segments together form a semi-enclosed cavity. The opening of the semi-enclosed cavity gradually increases from the inside to the outside. The height of the semi-enclosed cavity is not less than the height of the leather.

6. The fresh air system with dual-stage purification function according to claim 5, characterized in that: A connecting plate is provided on each of the two inclined straight segments between the edge away from the concave arc segment and the fixing frame. One edge of the connecting plate is fixed to the fixing frame. An air guide cavity is formed between the inclined straight segment and the corresponding connecting plate. Multiple vertically arranged air guide plates are fixed on the inner surface of the two inclined straight segments. The air guide plates are used to make the clean air that has been adsorbed by the secondary activated carbon layer flow toward the leather surface.

7. The fresh air system with dual-stage purification function according to claim 6, characterized in that: Vertically arranged air supply pipes are fixedly installed on the opposite side of the two connecting plates away from the fixed frame. Each air supply pipe has an upward-opening air supply cavity. A vertically arranged strip-shaped air outlet slit is provided on the outer circumference of the air supply pipe and communicates with the air supply cavity. The top opening of the air supply pipe is connected to one end of a connecting pipe. The connecting pipe is fixedly connected to the second crossbeam. The other ends of multiple connecting pipes located in the same row of the suspension area are connected to air supply branch pipes. One end of each air supply branch pipe in multiple rows of the suspension area is connected to the main air supply pipe. One end of the main air supply pipe is connected to the air outlet delivery pipe. Clean air in the air supply pipe will be sprayed out from the strip-shaped air outlet slit and form an air curtain on the side of the leather.

8. The fresh air system with dual-stage purification function according to claim 7, characterized in that: The secondary activated carbon layer includes a stainless steel frame and fibrous activated carbon filter cotton. Multiple spaced vertical rods are fixedly installed inside the stainless steel frame. The fibrous activated carbon filter cotton is connected and covered between the side rods of the stainless steel frame and the adjacent vertical rods, as well as between two adjacent vertical rods. Multiple air guide plates are correspondingly and fixedly connected to the multiple vertical rods on the inclined straight section. The stainless steel frame is detachably connected between the two air supply pipes.

Images