Fan filtering device and filtering method for laminar flow clean room

Abstract

The invention discloses a fan filtering device and a filtering method for a laminar flow clean room, and relates to the field of filtering devices.The fan filtering device comprises a shell and a fan, the fan is fixedly installed in the shell, a high-efficiency filter and a primary filtering assembly are arranged in the shell, and the primary filtering assembly comprises filtering cloth, a releasing roller and a winding roller; one end of the filter cloth is arranged on the release roller, the other end of the filter cloth is arranged on the wind-up roller, the release roller and the wind-up roller are both installed in the shell through the dismounting assembly, the primary filter assembly further comprises a driving unit and an indicating unit, and the driving unit comprises a fixed gear and a movable gear. According to the device, frequent replacement of the filter cloth is omitted, operation is simpler, use is more convenient, when the winding roller winds the filter cloth, the filter cloth on the winding roller can push the indicating plate to move downwards, the amount of the filter cloth wound on the winding roller can be known through the position of the indicating plate, and therefore the remaining amount of the filter cloth on the releasing roller can be known, and the filter cloth can be conveniently replaced in time.

Description

Technical Field

[0001] The invention relates to the field of filtering devices, and in particular to a fan filtering device and a filtering method for a laminar flow clean room. Background Art

[0002] Fan filter equipment is an air purification equipment that integrates fans, filters and control systems. It is widely used in clean rooms, laboratories, electronic manufacturing, pharmaceuticals and other places with high requirements for air cleanliness. The fan draws external air into the equipment through the air inlet. The air first passes through the primary filter to remove larger particles and impurities. The air after primary filtration enters the high-efficiency filter (HEPA) or ultra-high-efficiency filter (ULPA) to further remove tiny particles such as dust, pollen, bacteria, viruses, etc. The clean air after high-efficiency filtration is sent into the clean area through the air outlet to ensure that the air quality meets the requirements.

[0003] The core principle of laminar flow clean room is to use high-efficiency filters to filter out particulate matter and microorganisms in the air, and then send clean air into the clean room in a uniform laminar flow through fans and air ducts. The airflow flows in the same direction at a constant speed, usually in two forms: vertical laminar flow and horizontal laminar flow. This unidirectional airflow can quickly discharge pollutants from the clean room to prevent them from spreading indoors. The important component of laminar flow clean room is the fan filter equipment.

[0004] Chinese patent CN114931824B discloses a filter device assembly for a fan air duct, comprising an air duct, a filter plate is slidably connected to the middle of the air duct inner cavity, a top plate is fixedly connected to the upper end surface of the filter plate, a bracket is fixedly connected to the left side of the air duct inner cavity, and a transmission shaft is rotatably connected to the inner cavity of the bracket; a replacement assembly, the replacement assembly is arranged on the left and right sides of the upper end surface of the air duct; a purification assembly, the purification assembly is arranged on the left and right side walls of the filter plate; a scraping mechanism, a scraping mechanism is arranged on the right side of the outer wall of the transmission shaft, and the dust and harmful gas in the exhaust gas are filtered by the arrangement of the filter plate and the purification assembly, and the arrangement of the replacement assembly facilitates the user to quickly replace the filter plate and the purification assembly, and the scraping mechanism can scrape off the oil and dust on the surface of the filter plate and the purification assembly, thereby ensuring its good purification quality; Chinese patent application CN115814546A discloses an FFU fan filter device which is easy to clean, comprising a box lower cover, a box upper cover, a connecting plate, a fan and a filter, etc. The box lower cover is fixed at the air outlet, and the box lower cover and the box upper cover are fixedly connected by a connecting plate, and the connecting plates are symmetrically distributed on both sides of the box lower cover and the box upper cover, and a fan is installed in the box upper cover, and the filter is installed between the box lower cover and the box upper cover. A modular design is adopted to realize a sliding connection between the filter and the box, and the filter can be installed or removed conveniently and quickly, which is convenient for replacement, maintenance and cleaning; the filter dust can be quickly cleaned without completely removing the filter.

[0005] The above patents and prior art also have the following defects: There is often at least a primary filter before the high-efficiency filter to filter larger impurities in the air. However, as the first filter, the primary filter filters large particles and becomes dirty quickly. Large dust particles can easily clog the primary filter, so the primary filter needs to be replaced and cleaned frequently, which is troublesome and inconvenient to use. Moreover, the primary filter is installed inside the shell, and the dirtiness of the primary filter cannot be known in time, which can easily lead to a decrease in air filtration effect due to failure to replace the filter in time, and the adaptability is poor.

[0006] Therefore, the present application provides a fan filter device and a filtering method for a laminar flow clean room to meet the needs. Summary of the invention

[0007] The purpose of the present application is to provide a fan filter device and a filtering method for a laminar flow clean room, which eliminates the need for frequent replacement of filter cloth, is simpler to operate, and is more convenient to use. When the winding roller reels the filter cloth, the filter cloth on the winding roller will push the indicator plate to move downward, and the amount of filter cloth rolled up on the winding roller can be known through the position of the indicator plate, thereby knowing the remaining amount of filter cloth on the release roller, which is convenient for timely replacement of the filter cloth.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a fan filter device, comprising a housing and a fan, wherein the fan is fixedly installed in the housing, and a high-efficiency filter and a primary filter assembly are arranged in the housing; The primary filter assembly comprises a filter cloth, a release roller and a winding roller, one end of the filter cloth is arranged on the release roller, and the other end is arranged on the winding roller, and the release roller and the winding roller are both installed in the housing through a disassembly assembly; The primary filter assembly also includes a driving unit and an indicating unit. The driving unit includes a fixed gear and a movable gear. When the fixed gear rotates, the winding roller can be driven to rotate through the disassembly assembly. The movable gear meshes with the fixed gear and can drive the fixed gear to rotate. The indicating unit comprises a moving rod, an indicating plate and a disengaging block, wherein the moving rod abuts against the bottom of the filter cloth on the winding roller, and when the diameter of the filter cloth on the winding roller increases, the moving rod can be pushed to move downward, and the moving rod can drive the indicating plate to move out of the shell. After the moving rod drives the disengaging block to move to a specified position, the disengaging block can drive the moving gear to move, so that the moving gear is disengaged from the fixed gear.

[0009] Preferably, the indicating unit further comprises a vibrating spring piece, and when the disengagement block drives the movable gear to move and disengage from the fixed gear, the movable gear contacts the vibrating spring piece, and the rotation of the movable gear can drive the vibrating spring piece to deform and hit the movable gear when resetting.

[0010] Preferably, the disassembly assembly includes a fixed rod, which is rotatably connected to the inner wall of the shell, the cross-section of the fixed rod is rectangular, the fixed gear is fixedly installed on the fixed rod, both ends of the winding roller and the release roller are provided with slots, the cross-section of the slots is rectangular, the disassembly assembly also includes a movable plate, a compression spring, a movable rod, a telescopic rod and a telescopic cylinder, the telescopic cylinder is fixedly installed on the inner wall of the shell, the telescopic rod is inserted in the telescopic cylinder, the movable plate is fixedly installed on the telescopic rod, one end of the compression spring is fixedly installed on the telescopic cylinder, the other end of the compression spring is fixedly installed on the movable plate, the compression spring is sleeved on the telescopic rod, the movable rod is rotatably connected to the movable plate, and the cross-section of the movable rod is rectangular.

[0011] Preferably, the driving unit also includes a driving motor, a disengagement plate, a guide rod, a return spring and a fixed plate, the fixed plate being fixedly mounted on the inner wall of the shell, the guide rod being fixedly mounted on the fixed plate, the guide rod passing through the disengagement plate and slidingly cooperating with the disengagement plate, one end of the return spring being fixedly mounted on the fixed plate, the other end of the return spring being fixedly mounted on the disengagement plate, the return spring being sleeved on the guide rod, the driving motor being fixedly mounted on the disengagement plate, and the moving gear being rotatably connected to the output end of the driving motor.

[0012] Preferably, the indicating unit comprises two fixing frames, a reset spring and a fixing frame, one end of the reset spring is fixedly mounted on the shell, the other end of the reset spring is fixedly mounted on the fixing frame, the fixing frame is fixedly mounted on the two fixing frames, the moving rod is rotatably connected to the fixing frame, a moving hole is provided at the bottom of the shell, the fixing frame passes through the moving hole and slidably cooperates with the moving hole, a dustproof rubber strip is also provided between the fixing frame and the moving hole, the indicating plate is fixedly mounted on the bottom of the fixing frame, and the disengagement block is fixedly mounted on the fixing frame.

[0013] Preferably, a fixed air guide shell, a movable air guide shell and a clamping cylinder are also provided in the shell. The fixed air guide shell is fixedly installed in the shell, the movable air guide shell is slidingly fitted on the fixed air guide shell, the clamping cylinder is fixedly installed on the fixed air guide shell, and the output end of the clamping cylinder is fixedly installed on the movable air guide shell.

[0014] Preferably, a fixed compression shell is fixedly installed in the shell, the filter cloth is against the fixed compression shell, the movable air guide shell corresponds to the fixed compression shell, the high-efficiency filter is detachably installed in the shell, and the top of the high-efficiency filter is against the fixed compression shell.

[0015] Preferably, stabilizing grooves are provided on both sides of the fixing frame, a stabilizing rod is fixedly installed in the shell, the stabilizing rod is located in the stabilizing groove and slidably cooperates with the stabilizing groove, a plurality of blocks are fixedly installed in the shell, the blocks are located on both sides of the filter cloth, two guide rods are rotatably connected in the shell, and the guide rods are against the top of the filter cloth.

[0016] Preferably, the fan is installed in the fixed air guide shell, the fixed air guide shell is provided with an air inlet, a protective hole plate is fixedly installed on the fixed air guide shell corresponding to the air inlet position, a fixed handle is fixedly installed on the top of the shell, an air outlet panel is fixedly installed on the bottom of the shell, and an air outlet is provided on the air outlet panel.

[0017] A filtering method for a laminar clean room, using the above-mentioned fan filter device, comprises the following steps: The fan introduces the airflow into the housing, and the airflow passes through the filter cloth and the high-efficiency filter. The filter cloth filters the large dust particles in the airflow, and the high-efficiency filter filters the small dust particles in the airflow. When dust accumulates on the filter cloth to a certain extent and the filtration efficiency decreases, the movable gear rotates to drive the fixed gear to rotate, and the fixed gear drives the winding roller to rotate through the disassembly component, the winding roller winds up the filter cloth, and the release roller releases the filter cloth; The part of the filter cloth with more dust accumulation is removed and rolled up, while the clean part of the filter cloth continues to participate in filtering; As the filter cloth on the winding roller is wound up more and more, the diameter increases, and the filter cloth on the winding roller pushes the moving rod to move downward, and the moving rod drives the indicator plate to move downward. The remaining condition of the filter cloth can be judged by observing the position of the indicator plate; When the filter cloth on the release roller is almost used up, the filter cloth on the winding roller pushes the moving rod, and the moving rod drives the disengagement block to move. The disengagement block then pushes the moving gear to disengage from the fixed gear. At this time, the moving gear cannot drive the fixed gear and the winding roller to rotate, and the winding stops.

[0018] In summary, the technical effects and advantages of the present invention are as follows: 1. In the present invention, the filter cloth filters large dust particles in the airflow, and then the high-efficiency filter filters small dust particles in the airflow, thereby improving the filtering effect and increasing the service life of the high-efficiency filter. When the filter area of ​​the rolled filter cloth is dirty, the filter cloth is rolled up so that the clean part of the filter cloth continues to filter, thereby eliminating the need for frequent replacement of the filter cloth, making the operation simpler and more convenient to use. When the winding roller rolls up the filter cloth, the filter cloth on the winding roller pushes the indicator plate to move downward, and the amount of the rolled filter cloth on the winding roller can be known through the position of the indicator plate, thereby knowing the remaining amount of the filter cloth on the release roller, which is convenient for timely replacement of the filter cloth. 2. In the present invention, when the remaining amount of filter cloth on the release roller is close to being used up, the diameter of the filter cloth on the winding roller increases and drives the moving rod to move. When the moving rod drives the moving gear to move downward and disengage from the fixed gear, the moving gear disengages from the fixed gear and at the same time the moving gear contacts the vibrating spring piece. The vibrating spring piece is inclined. When the moving gear rotates, the moving gear will not drive the fixed gear and the winding roller to rotate. The moving gear drives the vibrating spring piece to deform. When the vibrating spring piece is reset, it hits the moving gear and vibrates itself to make a sound. As the moving gear rotates, multiple vibrating spring pieces continue to make sounds to remind people that the filter cloth on the release roller is used up and please replace it in time to prevent the filtering effect from being reduced due to failure to replace the filter cloth in time. Combined with the position of the indicator plate, the reminder to people after the filter cloth on the release roller is used up is more intuitive. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention; Figure 2 This is the second schematic diagram of the three-dimensional structure of the present invention; Figure 3 This is one of the internal structure schematic diagrams of the present invention; Figure 4 This is the second schematic diagram of the internal structure of the present invention; Figure 5 It is a structural schematic diagram of the fan and the fixed air guide shell in the present invention; Figure 6 It is a schematic diagram of the structure of the filter cloth and the moving rod in the present invention; Figure 7 For the present invention Figure 6 A magnified view of part A; Figure 8 It is a schematic diagram of the structure of the guide rod and the filter cloth in the present invention; Fig. 9 For the present invention Figure 8 A magnified view of part B; Fig.10 It is a schematic diagram of the structure of the release roller, the fixed pressing shell and the high efficiency filter in the present invention; Fig.11 For the present invention Fig.10 Magnified view of part C.

[0021] In the figure: 1, housing; 2, fan; 3, high efficiency filter; 4, primary filter assembly; 41, filter cloth; 42, release roller; 43, winding roller; 44, drive unit; 441, fixed gear; 442, moving gear; 443, drive motor; 444, release plate; 445, guide rod; 446, return spring; 447, fixed plate; 45, indicator unit; 451, moving rod; 452, indicator plate; 453, release block; 454, vibration Moving spring; 455, fixing frame; 456, reset spring; 457, fixing frame; 5, disassembly assembly; 51, fixing rod; 52, moving plate; 53, clamping spring; 54, moving rod; 55, telescopic rod; 56, telescopic tube; 6, fixing air guide shell; 7, moving air guide shell; 8, clamping cylinder; 9, fixing clamping shell; 10, stabilizing rod; 11, block; 12, protective hole plate; 13, fixing handle; 14, air outlet panel; 15, guide rod. DETAILED DESCRIPTION

[0022] 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.

[0023] Example 1: Reference Figure 1-Figure 11A fan filter device shown includes a housing 1 and a fan 2, wherein the fan 2 is fixedly installed in the housing 1, and a high-efficiency filter 3 and a primary filter assembly 4 are arranged in the housing 1; The primary filter assembly 4 includes a filter cloth 41, a release roller 42 and a winding roller 43. One end of the filter cloth 41 is arranged on the release roller 42, and the other end is arranged on the winding roller 43. The release roller 42 and the winding roller 43 are both installed in the housing 1 through a disassembly assembly 5. The primary filter assembly 4 further includes a driving unit 44 and an indicating unit 45. The driving unit 44 includes a fixed gear 441 and a moving gear 442. When the fixed gear 441 rotates, it can drive the winding roller 43 to rotate through the disassembly assembly 5. The moving gear 442 meshes with the fixed gear 441 and can drive the fixed gear 441 to rotate. The indicating unit 45 includes a moving rod 451, an indicating plate 452 and a disengaging block 453. The moving rod 451 abuts against the bottom of the filter cloth 41 on the winding roller 43. When the diameter of the filter cloth 41 on the winding roller 43 increases, the moving rod 451 can be pushed to move downward, and the moving rod 451 can drive the indicating plate 452 to move outward from the shell 1. After the moving rod 451 drives the disengaging block 453 to move to a specified position, the disengaging block 453 can drive the moving gear 442 to move, so that the moving gear 442 is disengaged from the fixed gear 441.

[0024] The fan 2 introduces the airflow into the housing 1, and the airflow passes through the filter cloth 41 and the high-efficiency filter 3. The filter cloth 41 filters large particles of dust in the airflow, and the high-efficiency filter 3 filters small particles of dust in the airflow. When the dust on the filter cloth 41 accumulates to a certain extent and the filtration efficiency decreases, the mobile gear 442 rotates to drive the fixed gear 441 to rotate, and the fixed gear 441 drives the winding roller 43 to rotate through the disassembly component 5. The winding roller 43 winds up the filter cloth 41, and the release roller 42 releases the filter cloth 41. The part of the filter cloth 41 with more dust accumulation is removed and rolled up, and the clean part of the filter cloth 41 continues to participate in the filtration. As the dust on the winding roller 43 passes through the filter cloth 41, the filter cloth 41 is moved away and rolled up, and the clean part of the filter cloth 41 continues to participate in the filtration. As more and more filter cloth 41 is wound up and its diameter increases, the filter cloth 41 on the winding roller 43 pushes the moving rod 451 to move downward, and the moving rod 451 drives the indicator plate 452 to move downward, and the remaining situation of the filter cloth 41 can be judged by observing the position of the indicator plate 452. When the filter cloth 41 on the release roller 42 is almost used up, the filter cloth 41 on the winding roller 43 pushes the moving rod 451, and the moving rod 451 drives the disengagement block 453 to move. The disengagement block 453 then pushes the moving gear 442 to disengage from the fixed gear 441. At this time, the moving gear 442 cannot drive the fixed gear 441 and the winding roller 43 to rotate, and the winding stops.

[0025] The filter cloth 41 filters large dust particles in the airflow, and then filters small dust particles in the airflow through the high-efficiency filter 3, thereby improving the filtering effect and increasing the service life of the high-efficiency filter 3. The filter cloth 41 is arranged in a roll. When the filtering area is dirty, the filter cloth 41 is rolled up so that the clean part of the filter cloth 41 continues to filter, eliminating the need for frequent replacement of the filter cloth 41, making the operation simpler and more convenient to use. When the winding roller 43 rolls up the filter cloth 41, the filter cloth 41 on the winding roller 43 will push the indicator plate 452 to move downward, and the position of the indicator plate 452 can be used to know the amount of filter cloth 41 rolled up on the winding roller 43, thereby knowing the remaining amount of filter cloth 41 on the release roller 42, so as to facilitate timely replacement of the filter cloth 41.

[0026] The high efficiency filter 3 is a prior art and will not be described in detail here.

[0027] Example 2, reference Figure 1-Figure 11 As shown, the difference from the above embodiment is that the indicating unit 45 also includes a vibrating spring piece 454. When the disengagement block 453 drives the moving gear 442 to move and disengage from the fixed gear 441, the moving gear 442 contacts the vibrating spring piece 454. The rotation of the moving gear 442 can drive the vibrating spring piece 454 to deform and hit the moving gear 442 when resetting.

[0028] When the remaining amount of filter cloth 41 on the release roller 42 is almost used up, the diameter of the filter cloth 41 on the winding roller 43 increases, driving the moving rod 451 to move. When the moving rod 451 drives the moving gear 442 to move downward and disengage from the fixed gear 441, the moving gear 442 is disengaged from the fixed gear 441, and the moving gear 442 contacts the vibrating spring piece 454. The vibrating spring piece 454 is set to be inclined. When the moving gear 442 rotates, the moving gear 442 will not drive the fixed gear 441 and the winding roller 43 to rotate. The moving gear 442 drives the vibrating spring piece 454 to deform. When the vibrating spring piece 454 is reset, it hits the moving gear 442 and vibrates itself to make a sound. As the moving gear 442 rotates, multiple vibrating spring pieces 454 continue to make sounds, reminding people that the filter cloth 41 on the release roller 42 is used up, please replace it in time to prevent the filtering effect from being reduced due to failure to replace the filter cloth 41 in time. With the position of the indicator plate 452, the reminder to people after the filter cloth 41 on the release roller 42 is used up is more intuitive.

[0029] Example 3, reference Figure 1-Figure 11As shown, it is different from the above-mentioned embodiment in that the disassembly component 5 includes a fixed plug rod 51, which is rotatably connected to the inner wall of the shell 1, and the cross-section of the fixed plug rod 51 is rectangular. The fixed gear 441 is fixedly installed on the fixed plug rod 51, and slots are provided at both ends of the winding roller 43 and the release roller 42, and the cross-section of the slots is rectangular. The disassembly component 5 also includes a movable plate 52, a clamping spring 53, a movable plug rod 54, a telescopic rod 55 and a telescopic cylinder 56. The telescopic cylinder 56 is fixedly installed on the inner wall of the shell 1, and the telescopic rod 55 is inserted in the telescopic cylinder 56. The movable plate 52 is fixedly installed on the telescopic rod 55, one end of the clamping spring 53 is fixedly installed on the telescopic cylinder 56, and the other end of the clamping spring 53 is fixedly installed on the movable plate 52. The clamping spring 53 is sleeved on the telescopic rod 55, and the movable plug rod 54 is rotatably connected to the movable plate 52, and the cross-section of the movable plug rod 54 is rectangular.

[0030] When the filter cloth 41 needs to be replaced, the movable plate 52 is pushed to move, and the movable plate 52 compresses the pressing spring 53 and contracts. At the same time, the movable plate 52 drives the movable plug rod 54 to disengage from the slots on the winding roller 43 and the release roller 42, and the winding roller 43 and the release roller 42 are moved so that their other ends are disengaged from the fixed plug rod 51. The winding roller 43 and the release roller 42 are removed, and the new winding roller 43 and the release roller 42 with the new filter cloth 41 are installed in the same way. One end of the new filter cloth 41 is guided and fixed on the winding roller 43, so that the filter cloth 41 is convenient to replace, the operation is simpler, and time and labor are saved.

[0031] Example 4, reference Figure 1-Figure 11 As shown, different from the above embodiment, the driving unit 44 also includes a driving motor 443, a disengagement plate 444, a guide rod 445, a reset spring 446 and a fixed plate 447. The fixed plate 447 is fixedly mounted on the inner wall of the shell 1, the guide rod 445 is fixedly mounted on the fixed plate 447, the guide rod 445 passes through the disengagement plate 444 and slides with the disengagement plate 444, one end of the reset spring 446 is fixedly mounted on the fixed plate 447, the other end of the reset spring 446 is fixedly mounted on the disengagement plate 444, the reset spring 446 is sleeved on the guide rod 445, the driving motor 443 is fixedly mounted on the disengagement plate 444, and the moving gear 442 is rotatably connected to the output end of the driving motor 443.

[0032] The driving motor 443 drives the moving gear 442 to rotate, the moving gear 442 drives the fixed gear 441 to rotate, the fixed gear 441 drives the fixed plug rod 51 to rotate, the fixed plug rod 51 drives the winding roller 43 to rotate, and the winding roller 43 drives the moving plug rod 54 to rotate on the moving plate 52.

[0033] Example 5, reference Figure 1-Figure 11As shown, it is different from the above embodiment in that the indicating unit 45 includes two fixing frames 455, a reset spring 456 and a fixing frame 457, one end of the reset spring 456 is fixedly mounted on the shell 1, and the other end of the reset spring 456 is fixedly mounted on the fixing frame 455, the fixing frame 457 is fixedly mounted on the two fixing frames 455, the moving rod 451 is rotatably connected to the fixing frame 457, a moving hole is opened at the bottom of the shell 1, the fixing frame 457 passes through the moving hole and slidably cooperates with the moving hole, a dustproof rubber strip is also arranged between the fixing frame 457 and the moving hole, the indicating plate 452 is fixedly mounted on the bottom of the fixing frame 457, and the disengagement block 453 is fixedly mounted on the fixing frame 455.

[0034] As the winding diameter of the filter cloth 41 on the winding roller 43 increases, the filter cloth 41 pushes the moving rod 451 to move downward, and the moving rod 451 drives the fixed frame 457 to move downward, and the fixed frame 457 drives the indicating plate 452 to move away from the shell 1. At the same time, the fixed frame 457 drives the fixing frame 455 to move. When the filter cloth 41 on the release roller 42 is almost used up and the winding roller 43 continues to be wound, the fixed frame 457 drives the disengagement block 453 to move, so that the disengagement block 453 moves and contacts the disengagement plate 444, and drives the disengagement plate 444 to move. The disengagement plate 444 drives the driving motor 443 and the moving gear 442 to move downward and compress the reset spring 446. When a new winding roller 43 is replaced, the reset tension spring 456 drives the moving rod 451 and the indicating plate 452 to reset, and the reset spring 446 drives the driving motor 443 and the moving gear 442 to reset, and the moving gear 442 engages with the fixed gear 441.

[0035] Example 6, reference Figure 1-Figure 11 As shown, the difference from the above embodiment is that a fixed air guide shell 6, a movable air guide shell 7 and a clamping cylinder 8 are also provided in the shell 1, the fixed air guide shell 6 is fixedly installed in the shell 1, the movable air guide shell 7 is slidably fitted on the fixed air guide shell 6, the clamping cylinder 8 is fixedly installed on the fixed air guide shell 6, and the output end of the clamping cylinder 8 is fixedly installed on the movable air guide shell 7.

[0036] The fan 2 introduces the airflow into the fixed air guide shell 6, and discharges it through the mobile air guide shell 7, the filter cloth 41 and the high-efficiency filter 3. When the filter cloth 41 is rolled up, the clamping cylinder 8 drives the mobile air guide shell 7 to move upward, and the mobile air guide shell 7 is removed from the filter cloth 41, so that the filter cloth 41 can move. When the filter cloth 41 has completed moving, the clamping cylinder 8 drives the mobile air guide shell 7 to move downward, compresses the filter cloth 41, and allows the airflow to be filtered by the filter cloth 41 without leakage.

[0037] Example 7, reference Figure 1-Figure 11As shown, it is different from the above-mentioned embodiment in that a fixed compression shell 9 is fixedly installed in the shell 1, the filter cloth 41 is against the fixed compression shell 9, the movable air guide shell 7 corresponds to the fixed compression shell 9, the high-efficiency filter 3 is detachably installed in the shell 1, and the top of the high-efficiency filter 3 is against the fixed compression shell 9.

[0038] The movable air guide shell 7 presses the filter cloth 41 onto the fixed pressing shell 9 to prevent leakage.

[0039] Example 8, reference Figure 1-Figure 11 As shown, it is different from the above-mentioned embodiment in that stabilizing grooves are opened on both sides of the fixing frame 455, and a stabilizing rod 10 is fixedly installed in the shell 1. The stabilizing rod 10 is located in the stabilizing groove and slidably cooperates with the stabilizing groove. A plurality of stoppers 11 are fixedly installed in the shell 1, and the stoppers 11 are located on both sides of the filter cloth 41. Two guide rods 15 are rotatably connected in the shell 1, and the guide rods 15 are against the top of the filter cloth 41.

[0040] The stabilizing rod 10 makes the fixing frame 455 more stable and less likely to shake, and the stopper 11 prevents the filter cloth 41 from deflecting, so that the winding is more accurate.

[0041] Example 9, reference Figure 1-Figure 11 As shown, the difference from the above embodiment is that the fan 2 is installed in a fixed air guide shell 6, an air inlet is opened on the fixed air guide shell 6, a protective hole plate 12 is fixedly installed at the position of the fixed air guide shell 6 corresponding to the air inlet, a fixed handle 13 is fixedly installed on the top of the shell 1, and an air outlet panel 14 is fixedly installed on the bottom of the shell 1, and an air outlet is opened on the air outlet panel 14.

[0042] A filtering method for a laminar clean room, using the above-mentioned fan filter device, comprises the following steps: The fan 2 introduces the airflow into the housing 1, and the airflow passes through the filter cloth 41 and the high-efficiency filter 3. The filter cloth 41 filters the large dust particles in the airflow, and the high-efficiency filter 3 filters the small dust particles in the airflow. When dust accumulates on the filter cloth 41 to a certain extent and the filtration efficiency decreases, the movable gear 442 rotates to drive the fixed gear 441 to rotate, and the fixed gear 441 drives the winding roller 43 to rotate through the disassembly component 5, and the winding roller 43 winds up the filter cloth 41, and the release roller 42 releases the filter cloth 41; The part of the filter cloth 41 with more dust accumulation is removed and rolled up, and the clean part of the filter cloth 41 continues to participate in filtering; As the filter cloth 41 on the winding roller 43 is wound up more and more, the diameter increases, and the filter cloth 41 on the winding roller 43 pushes the moving rod 451 to move downward, and the moving rod 451 drives the indicating plate 452 to move downward, and the remaining condition of the filter cloth 41 can be judged by observing the position of the indicating plate 452; When the filter cloth 41 on the release roller 42 is almost used up, the filter cloth 41 on the winding roller 43 pushes the moving rod 451, and the moving rod 451 drives the disengagement block 453 to move. The disengagement block 453 then pushes the moving gear 442 to disengage from the fixed gear 441. At this time, the moving gear 442 cannot drive the fixed gear 441 and the winding roller 43 to rotate, and the winding stops.

[0043] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fan filter device, comprising a housing and a fan, characterized in that: The fan is fixedly installed in the housing, and a high-efficiency filter and a primary-efficiency filter assembly are arranged in the housing; The primary filter assembly comprises a filter cloth, a release roller and a winding roller, one end of the filter cloth is arranged on the release roller, and the other end is arranged on the winding roller, and the release roller and the winding roller are both installed in the housing through a disassembly assembly; The primary filter assembly also includes a driving unit and an indicating unit. The driving unit includes a fixed gear and a movable gear. When the fixed gear rotates, the winding roller can be driven to rotate through the disassembly assembly. The movable gear meshes with the fixed gear and can drive the fixed gear to rotate. The indicating unit comprises a moving rod, an indicating plate and a disengaging block, wherein the moving rod abuts against the bottom of the filter cloth on the winding roller, and when the diameter of the filter cloth on the winding roller increases, the moving rod can be pushed to move downward, and the moving rod can drive the indicating plate to move out of the shell. After the moving rod drives the disengaging block to move to a specified position, the disengaging block can drive the moving gear to move, so that the moving gear is disengaged from the fixed gear.

2. A fan filter device according to claim 1, characterized in that: The indicating unit also includes a vibrating spring. When the disengagement block drives the moving gear to move and disengage from the fixed gear, the moving gear contacts the vibrating spring. The rotation of the moving gear can drive the vibrating spring to deform and hit the moving gear when resetting.

3. A fan filter device according to claim 1, characterized in that: The disassembly assembly includes a fixed plug rod, which is rotatably connected to the inner wall of the shell, the cross-section of the fixed plug rod is rectangular, the fixed gear is fixedly installed on the fixed plug rod, both ends of the winding roller and the release roller are provided with slots, the cross-section of the slots is rectangular, the disassembly assembly also includes a movable plate, a clamping spring, a movable plug rod, a telescopic rod and a telescopic cylinder, the telescopic cylinder is fixedly installed on the inner wall of the shell, the telescopic rod is inserted in the telescopic cylinder, the movable plate is fixedly installed on the telescopic rod, one end of the clamping spring is fixedly installed on the telescopic cylinder, the other end of the clamping spring is fixedly installed on the movable plate, the clamping spring is sleeved on the telescopic rod, the movable plug rod is rotatably connected to the movable plate, and the cross-section of the movable plug rod is rectangular.

4. A fan filter device according to claim 1, characterized in that: The driving unit also includes a driving motor, a disengagement plate, a guide rod, a return spring and a fixed plate, wherein the fixed plate is fixedly mounted on the inner wall of the shell, the guide rod is fixedly mounted on the fixed plate, the guide rod passes through the disengagement plate and slidably cooperates with the disengagement plate, one end of the return spring is fixedly mounted on the fixed plate, the other end of the return spring is fixedly mounted on the disengagement plate, the return spring is sleeved on the guide rod, the driving motor is fixedly mounted on the disengagement plate, and the moving gear is rotatably connected to the output end of the driving motor.

5. A fan filter device according to claim 1, characterized in that: The indicating unit includes two fixing frames, a reset spring and a fixing frame, one end of the reset spring is fixedly mounted on the shell, the other end of the reset spring is fixedly mounted on the fixing frame, the fixing frame is fixedly mounted on the two fixing frames, the moving rod is rotatably connected to the fixing frame, a moving hole is provided at the bottom of the shell, the fixing frame passes through the moving hole and slidably cooperates with the moving hole, a dustproof rubber strip is also provided between the fixing frame and the moving hole, the indicating plate is fixedly mounted on the bottom of the fixing frame, and the disengagement block is fixedly mounted on the fixing frame.

6. A fan filter device according to claim 1, characterized in that: A fixed air guide shell, a movable air guide shell and a clamping cylinder are also provided in the shell. The fixed air guide shell is fixedly installed in the shell. The movable air guide shell is slidably fitted on the fixed air guide shell. The clamping cylinder is fixedly installed on the fixed air guide shell. The output end of the clamping cylinder is fixedly installed on the movable air guide shell.

7. A fan filter device according to claim 6, characterized in that: A fixed compression shell is fixedly installed in the shell, the filter cloth is against the fixed compression shell, the movable air guide shell corresponds to the fixed compression shell, the high-efficiency filter is detachably installed in the shell, and the top of the high-efficiency filter is against the fixed compression shell.

8. A fan filter device according to claim 5, characterized in that: Stabilizing grooves are provided on both sides of the fixing frame, a stabilizing rod is fixedly installed in the shell, the stabilizing rod is located in the stabilizing groove and slidably cooperates with the stabilizing groove, a plurality of stoppers are fixedly installed in the shell, the stoppers are located on both sides of the filter cloth, two guide rods are rotatably connected in the shell, and the guide rods are against the top of the filter cloth.

9. A fan filter device according to claim 6, characterized in that: The fan is installed in the fixed air guide shell, which is provided with an air inlet, and a protective hole plate is fixedly installed on the fixed air guide shell corresponding to the air inlet position. A fixed handle is fixedly installed on the top of the shell, and an air outlet panel is fixedly installed on the bottom of the shell, and an air outlet is opened on the air outlet panel.

10. A filtering method for a laminar clean room, using the fan filter device according to any one of claims 1 to 9, characterized in that: The following steps are involved: The fan introduces the airflow into the housing, and the airflow passes through the filter cloth and the high-efficiency filter. The filter cloth filters the large dust particles in the airflow, and the high-efficiency filter filters the small dust particles in the airflow. When dust accumulates on the filter cloth to a certain extent and the filtration efficiency decreases, the movable gear rotates to drive the fixed gear to rotate, and the fixed gear drives the winding roller to rotate through the disassembly component, the winding roller winds up the filter cloth, and the release roller releases the filter cloth; The part of the filter cloth with more dust accumulation is removed and rolled up, while the clean part of the filter cloth continues to participate in filtering; As the filter cloth on the winding roller is wound up more and more, the diameter increases, and the filter cloth on the winding roller pushes the moving rod to move downward, and the moving rod drives the indicator plate to move downward. The remaining condition of the filter cloth can be judged by observing the position of the indicator plate; When the filter cloth on the release roller is almost used up, the filter cloth on the winding roller pushes the moving rod, and the moving rod drives the disengagement block to move. The disengagement block then pushes the moving gear to disengage from the fixed gear. At this time, the moving gear cannot drive the fixed gear and the winding roller to rotate, and the winding stops.

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