A fan filter device and a filtering method for a laminar flow clean room

Abstract

The present invention discloses a fan filter device and a filtering method for a laminar flow clean room, which relates to the field of filter devices and includes a housing and a fan. 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 includes 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. Both the release roller and the winding roller are installed in the housing through a disassembly assembly. The primary filter assembly further includes a driving unit and an indicating unit, and the driving unit includes a fixed gear and a moving gear. Frequent replacement of the filter cloth is omitted, the operation is simpler, and the use is more convenient. When the winding roller winds the filter cloth, the filter cloth on the winding roller will push the indicating plate downward, and the amount of the filter cloth wound on the winding roller can be known through the position of the indicating plate, so as to know the remaining amount of the filter cloth on the release roller, which is convenient for timely replacement of the filter cloth.

Description

Technical Field

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

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

[0003] The core principle of a laminar flow clean room is to filter particles and microorganisms in the air using a high-efficiency filter, and then send the clean air into the clean room in a uniform laminar flow form through a fan and air ducts. The air flow moves at a constant speed in the same direction, usually divided into two forms: vertical laminar flow and horizontal laminar flow. This unidirectional air flow can quickly discharge pollutants from the clean room and prevent them from spreading indoors. An important device in a laminar flow clean room is a fan filtration device.

[0004] Chinese Patent CN114931824B discloses a filtration device assembly for a fan air duct, including an air duct. A filter plate is slidably connected to the middle of the inner cavity of the air duct. 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 inner cavity of the air duct. A transmission shaft is rotatably connected to the inner cavity of the bracket; a replacement assembly is arranged on the left and right sides of the upper end surface of the air duct; a purification assembly is arranged on the left and right side walls of the filter plate; a scraping mechanism is arranged on the right side of the outer wall of the transmission shaft. Through the arrangement of the filter plate and the purification assembly, the filtration of dust and harmful gases in the waste gas is realized. Through the arrangement of the replacement assembly, it is convenient for the user to quickly replace the filter plate and the purification assembly. Through the arrangement of the scraping mechanism, the oil stains and dust on the surfaces of the filter plate and the purification assembly can be scraped off, ensuring its good purification quality;

[0005] Chinese Patent Application CN115814546A discloses an FFU fan filter device that is easy to clean, including a lower box body, an upper box body, a connecting plate, a fan, a filter, etc. The lower box body is fixed at the air outlet, and the lower box body and the upper box body are fixedly connected through the connecting plate. The connecting plates are symmetrically distributed on both sides of the lower box body and the upper box body, and a fan is installed in the upper box body. The filter is installed between the lower box body and the upper box body. With a modular design, a sliding connection between the filter and the box body is achieved, enabling the filter to be installed or removed conveniently and quickly, facilitating replacement, maintenance, and cleaning; it can quickly clean the dust on the filter without completely removing the filter.

[0006] The above patent and the prior art also have the following defects:

[0007] There is usually at least a primary filter in front of the high-efficiency filter to filter larger impurities in the air. However, since the primary filter is the first stage of filtration and filters large particles, it gets dirty quickly. Large particle dust easily clogs the primary filter, and the primary filter needs to be frequently replaced and cleaned, which is rather troublesome to operate and inconvenient to use. Moreover, the primary filter is installed inside the housing, and it is impossible to timely know the dirt condition of the primary filter, which easily leads to a decrease in air filtration effect due to the failure to replace the filter in time, and has poor adaptability.

[0008] Therefore, the present application provides a fan filter device and a filtration method for a laminar flow clean room to meet the requirements. Summary of the Invention

[0009] The purpose of the present application is to provide a fan filter device and a filtration method for a laminar flow clean room, which eliminates the need for frequent replacement of the filter cloth, is simpler to operate and more convenient to use. When the winding roller winds the filter cloth, the filter cloth on the winding roller will push the indicator plate downward, and the amount of filter cloth wound on the winding roller can be known through the position of the indicator plate, so as to know the remaining amount of filter cloth on the unwinding roller, facilitating timely replacement of the filter cloth.

[0010] To achieve the above purpose, the present application provides the following technical solution: A fan filter device, including a housing and a fan, the fan is fixedly installed in the housing, and a high-efficiency filter and a primary filtration component are arranged in the housing;

[0011] The primary filtration component includes a filter cloth, an unwinding roller, and a winding roller. One end of the filter cloth is arranged on the unwinding roller, and the other end is arranged on the winding roller. The unwinding roller and the winding roller are both installed in the housing through a disassembly component;

[0012] The primary filter component further includes a driving unit and an indicating unit. The driving unit includes a fixed gear and a moving gear. When the fixed gear rotates, it can drive the winding roller to rotate through a disassembly component. The moving gear meshes with the fixed gear and can drive the fixed gear to rotate.

[0013] The indicating unit includes a moving rod, an indicating plate, and a disengaging block. The moving rod abuts against the bottom of the filter cloth on the winding roller. When the diameter of the filter cloth on the winding roller increases, it can push the moving rod downward. The moving rod can drive the indicating plate to move out of the housing. After the moving rod drives the disengaging block to move to a specified position, the disengaging block can drive the moving gear to move, causing the moving gear to disengage from the fixed gear.

[0014] Preferably, the indicating unit further includes a vibration elastic sheet. When the disengaging block drives the moving gear to move and disengage from the fixed gear, the moving gear contacts the vibration elastic sheet. The rotation of the moving gear can drive the vibration elastic sheet to deform and strike the moving gear when it returns to its original position.

[0015] Preferably, the disassembly component includes a fixed plug rod. The fixed plug rod is rotatably connected to the inner wall of the housing. The cross-section of the fixed plug rod is rectangular. The fixed gear is fixedly installed on the fixed plug rod. Slots are provided at both ends of the winding roller and the release roller. The cross-section of the slots is rectangular. The disassembly component further includes a moving plate, a compression spring, a moving plug rod, a telescopic rod, and a telescopic cylinder. The telescopic cylinder is fixedly installed on the inner wall of the housing. The telescopic rod is inserted into the telescopic cylinder. The moving plate is fixedly installed on the telescopic rod. One end of the compression spring is fixedly installed on the telescopic cylinder, and the other end is fixedly installed on the moving plate. The compression spring is sleeved on the telescopic rod. The moving plug rod is rotatably connected to the moving plate. The cross-section of the moving plug rod is rectangular.

[0016] Preferably, the driving unit further includes a driving motor, a disengaging plate, a guide rod, a return spring, and a fixing plate. The fixing plate is fixedly installed on the inner wall of the housing. The guide rod is fixedly installed on the fixing plate. The guide rod passes through the disengaging plate and is slidably engaged with the disengaging plate. One end of the return spring is fixedly installed on the fixing plate, and the other end is fixedly installed on the disengaging plate. The return spring is sleeved on the guide rod. The driving motor is fixedly installed on the disengaging plate. The moving gear is rotatably connected to the output end of the driving motor.

[0017] Preferably, the indicating unit includes two fixing frames, a reset tension spring and a fixing frame. One end of the reset tension spring is fixedly installed on the housing, the other end of the reset tension spring is fixedly installed on the fixing frame, the fixing frame is fixedly installed on the two fixing frames, the moving rod is rotatably connected to the fixing frame, a moving hole is opened at the bottom of the housing, the fixing frame penetrates through the moving hole and is slidably matched with the moving hole, a dust-proof rubber strip is further arranged between the fixing frame and the moving hole, the indicating plate is fixedly installed at the bottom of the fixing frame, and the disengaging block is fixedly installed on the fixing frame.

[0018] Preferably, a fixed air guide housing, a movable air guide housing and a pressing cylinder are further arranged in the housing. The fixed air guide housing is fixedly installed in the housing, the movable air guide housing is slidably matched with the fixed air guide housing, the pressing cylinder is fixedly installed on the fixed air guide housing, and the output end of the pressing cylinder is fixedly installed on the movable air guide housing.

[0019] Preferably, a fixed pressing housing is fixedly installed in the housing. The filter cloth abuts against the fixed pressing housing. The movable air guide housing corresponds to the fixed pressing housing. The high-efficiency filter is detachably installed in the housing, and the top of the high-efficiency filter abuts against the fixed pressing housing.

[0020] Preferably, stabilizing grooves are formed on both sides of the fixing frame. A stabilizing rod is fixedly installed in the housing. The stabilizing rod is located in the stabilizing groove and is slidably matched with the stabilizing groove. A plurality of blocking blocks are fixedly installed in the housing. The blocking blocks are located on both sides of the filter cloth. Two guiding rods are rotatably connected in the housing. The guiding rods abut against the top of the filter cloth.

[0021] Preferably, the fan is installed in the fixed air guide housing. An air inlet is formed on the fixed air guide housing. A protective hole plate is fixedly installed at the position corresponding to the air inlet of the fixed air guide housing. A fixed handle is fixedly installed at the top of the housing. An air outlet panel is fixedly installed at the bottom of the housing. An air outlet is formed on the air outlet panel.

[0022] A filtering method for a laminar flow clean room using the above-mentioned fan filtering device includes the following steps:

[0023] The fan introduces air flow into the housing. The air flow passes through the filter cloth and the high-efficiency filter. The filter cloth filters large-particle dust in the air flow, and the high-efficiency filter filters small-particle dust in the air flow;

[0024] When the dust accumulation on the filter cloth reaches a certain level and the filtering efficiency decreases, the moving gear rotates to drive the fixed gear to rotate. The fixed gear drives the winding roller to rotate through the disassembly component. The winding roller winds up the filter cloth, and the releasing roller releases the filter cloth;

[0025] The part of the filter cloth with more accumulated dust is removed and wound up, and the clean part of the filter cloth continues to participate in filtration;

[0026] As more and more filter cloth on the winding roller is wound up and the diameter increases, the filter cloth on the winding roller pushes the moving rod downward, and the moving rod drives the indicating plate downward, so that the remaining situation of the filter cloth can be judged by observing the position of the indicating plate;

[0027] When the filter cloth on the release roller is nearly used up, the filter cloth on the winding roller pushes the moving rod, and the moving rod drives the disengaging block to move. At this time, the disengaging block 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.

[0028] In summary, the technical effects and advantages of the present invention are as follows:

[0029] 1. In the present invention, the filter cloth filters large-particle dust in the air flow, and then the high-efficiency filter filters small-particle dust in the air flow, improving the filtration effect and also increasing the service life of the high-efficiency filter. When the filter area becomes dirty with the rolled filter cloth, the filter cloth is wound up, so that the clean part of the filter cloth continues to filter, eliminating the need for frequent filter cloth replacement, making the operation simpler and more convenient to use. When the winding roller winds up the filter cloth, the filter cloth on the winding roller will push the indicating plate downward, and the amount of filter cloth wound on the winding roller can be known through the position of the indicating plate, so as to know the remaining amount of filter cloth on the release roller, facilitating timely replacement of the filter cloth;

[0030] 2. In the present invention, when the remaining amount of the filter cloth on the release roller is nearly used up, as 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 vibration elastic piece. The vibration elastic piece is inclined. When the moving gear rotates, the moving gear will not drive the fixed gear and the winding roller to rotate, and the moving gear drives the vibration elastic piece to deform. When the vibration elastic piece resets, it impacts the moving gear and vibrates itself to emit a sound. As the moving gear rotates, multiple vibration elastic pieces continuously emit sounds, reminding people that the filter cloth on the release roller has been used up and needs to be replaced in time, preventing the filtration effect from decreasing due to untimely replacement of the filter cloth. Combined with the position of the indicating plate, the reminder to people after the filter cloth on the release roller is used up is more intuitive. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 One of the three-dimensional structure diagrams of the present invention;

[0033] Figure 2 Another three-dimensional structure diagram of the present invention;

[0034] Figure 3 One of the internal structure diagrams of the present invention;

[0035] Figure 4 Another internal structure diagram of the present invention;

[0036] Figure 5 Structure diagram of the blower and the fixed air guide housing in the present invention;

[0037] Figure 6 Structure diagram of the filter cloth and the moving rod in the present invention;

[0038] Figure 7 For the present invention Figure 6 Enlarged view of part A in;

[0039] Figure 8 Structure diagram of the guide rod and the filter cloth in the present invention;

[0040] Figure 9 For the present invention Figure 8 Enlarged view of part B in;

[0041] Figure 10 Structure diagram of the release roller, the fixed pressing housing and the high-efficiency filter in the present invention;

[0042] Figure 11 For the present invention Figure 10 Enlarged view of part C in.

[0043] In the figure: 1. housing; 2. blower; 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. separation plate; 445. guide rod; 446. return spring; 447. fixing plate; 45. indicating unit; 451. moving rod; 452. indicating plate; 453. separation block; 454. vibration elastic sheet; 455. fixing bracket; 456. return tension spring; 457. fixing frame; 5. disassembly component; 51. fixed insertion rod; 52. moving plate; 53. pressing spring; 54. moving insertion rod; 55. telescopic rod; 56. telescopic cylinder; 6. fixed air guide housing; 7. moving air guide housing; 8. pressing cylinder; 9. fixed pressing housing; 10. stabilizing rod; 11. stop block; 12. protective hole plate; 13. fixed handle; 14. air outlet panel; 15. guide rod. Detailed implementation manners

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] Embodiment 1: Refer to Figures 1-11 A fan filter device shown in the figure, which includes a housing 1 and a fan 2. The fan 2 is fixedly installed in the housing 1. An efficient filter 3 and a primary filter assembly 4 are arranged in the housing 1;

[0046] 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. Both the release roller 42 and the winding roller 43 are installed in the housing 1 through a disassembly assembly 5;

[0047] 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;

[0048] 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, it can push the moving rod 451 to move downward. The moving rod 451 can drive the indicating plate 452 to move out of the housing 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 disengages from the fixed gear 441.

[0049] The fan 2 introduces air flow into the housing 1. The air flow passes through the filter cloth 41 and the high-efficiency filter 3. The filter cloth 41 filters large particulate dust in the air flow, and the high-efficiency filter 3 filters small particulate dust in the air flow. When the dust accumulation on the filter cloth 41 reaches a certain level and the filtration efficiency decreases, the moving gear 442 rotates to drive the fixed gear 441 to rotate. 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 wound up, and the clean part of the filter cloth 41 continues to participate in the filtration. As more and more of the filter cloth 41 on the winding roller 43 is wound up and the diameter increases, the filter cloth 41 on the winding roller 43 pushes the moving rod 451 downward. The moving rod 451 drives the indicator board 452 to move downward, and the remaining situation of the filter cloth 41 can be judged by observing the position of the indicator board 452. When the filter cloth 41 on the release roller 42 is nearly used up, the filter cloth 41 on the winding roller 43 pushes the moving rod 451 through the moving rod 451 to drive the separation block 453 to move. At this time, the separation block 453 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.

[0050] The filter cloth 41 filters large particulate dust in the air flow, and then the high-efficiency filter 3 filters small particulate dust in the air flow, improving the filtration effect and also increasing the service life of the high-efficiency filter 3. The filter cloth 41 is set in a roll. When the filtration area becomes dirty, the filter cloth 41 is wound 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 winds up the filter cloth 41, the filter cloth 41 on the winding roller 43 will push the indicator board 452 downward, and the amount of the filter cloth 41 wound on the winding roller 43 can be known through the position of the indicator board 452, so as to know the remaining amount of the filter cloth 41 on the release roller 42, facilitating the timely replacement of the filter cloth 41.

[0051] The high-efficiency filter 3 is a prior art and will not be described in detail here.

[0052] Embodiment 2, referring to Figures 1-11 As shown, different from the above embodiment, the indicating unit 45 further includes a vibration elastic sheet 454. When the separation block 453 drives the moving gear 442 to move to disengage from the fixed gear 441, the moving gear 442 contacts the vibration elastic sheet 454. The rotation of the moving gear 442 can drive the vibration elastic sheet 454 to deform and strike the moving gear 442 when resetting.

[0053] When the remaining amount of the filter cloth 41 on the release roller 42 is close to being 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 disengages from the fixed gear 441 and at the same time the moving gear 442 contacts the vibration elastic piece 454. The vibration elastic piece 454 is 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 vibration elastic piece 454 to deform. When the vibration elastic piece 454 resets, it impacts the moving gear 442 and vibrates itself to emit a sound. As the moving gear 442 rotates, multiple vibration elastic pieces 454 continuously emit sounds, reminding people that the filter cloth 41 on the release roller 42 has been used up and needs to be replaced in time to prevent the decline of the filtering effect caused by the failure to replace the filter cloth 41 in time. In cooperation with the position of the indicator board 452, the reminder to people after the filter cloth 41 on the release roller 42 is used up is more intuitive.

[0054] Embodiment 3, referring to Figures 1-11 As shown, different from the above embodiment, the disassembly component 5 includes a fixed insertion rod 51, the fixed insertion rod 51 is rotatably connected to the inner wall of the housing 1, the cross-section of the fixed insertion rod 51 is rectangular, the fixed gear 441 is fixedly installed on the fixed insertion rod 51, slots are provided at both ends of the winding roller 43 and the release roller 42, and the cross-section of the slot is rectangular. The disassembly component 5 further includes a moving plate 52, a compression spring 53, a moving insertion rod 54, a telescopic rod 55 and a telescopic cylinder 56. The telescopic cylinder 56 is fixedly installed on the inner wall of the housing 1, the telescopic rod 55 is inserted into the telescopic cylinder 56, the moving plate 52 is fixedly installed on the telescopic rod 55, one end of the compression spring 53 is fixedly installed on the telescopic cylinder 56, the other end of the compression spring 53 is fixedly installed on the moving plate 52, the compression spring 53 is sleeved on the telescopic rod 55, the moving insertion rod 54 is rotatably connected to the moving plate 52, and the cross-section of the moving insertion rod 54 is rectangular.

[0055] When the filter cloth 41 needs to be replaced, push the moving plate 52 to move. The moving plate 52 compresses the compression spring 53 to contract. At the same time, the moving plate 52 drives the moving insertion rod 54 to disengage from the slots on the winding roller 43 and the release roller 42, and move the winding roller 43 and the release roller 42 so that the other end disengages from the fixed insertion rod 51, remove the winding roller 43 and the release roller 42, and install the new winding roller 43 and the release roller 42 with the new filter cloth 41 in the same way. Guide and fix one end of the new filter cloth 41 on the winding roller 43, which is convenient for replacing the filter cloth 41, and the operation is simpler, saving time and effort.

[0056] Embodiment 4, referring to Figures 1-11As shown in the figure, it is different from the above embodiment in that the driving unit 44 further includes a driving motor 443, a separating plate 444, a guide rod 445, a return spring 446 and a fixing plate 447. The fixing plate 447 is fixedly installed on the inner wall of the housing 1. The guide rod 445 is fixedly installed on the fixing plate 447. The guide rod 445 penetrates through the separating plate 444 and is slidably engaged with the separating plate 444. One end of the return spring 446 is fixedly installed on the fixing plate 447, and the other end of the return spring 446 is fixedly installed on the separating plate 444. The return spring 446 is sleeved on the guide rod 445. The driving motor 443 is fixedly installed on the separating plate 444, and the moving gear 442 is rotatably connected to the output end of the driving motor 443.

[0057] 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 insertion rod 51 to rotate. The fixed insertion rod 51 drives the winding roller 43 to rotate. The winding roller 43 drives the moving insertion rod 54 to rotate on the moving plate 52.

[0058] Embodiment 5, refer to Figures 1-11 As shown in the figure, it is different from the above embodiment in that the indicating unit 45 includes two fixing brackets 455, a return tension spring 456 and a fixing frame 457. One end of the return tension spring 456 is fixedly installed on the housing 1, and the other end of the return tension spring 456 is fixedly installed on the fixing bracket 455. The fixing frame 457 is fixedly installed on the two fixing brackets 455. The moving rod 451 is rotatably connected to the fixing frame 457. A moving hole is formed at the bottom of the housing 1. The fixing frame 457 penetrates through the moving hole and is slidably engaged with the moving hole. A dust-proof rubber strip is further provided between the fixing frame 457 and the moving hole. The indicating plate 452 is fixedly installed at the bottom of the fixing frame 457. The separating block 453 is fixedly installed on the fixing bracket 455.

[0059] As the filter cloth 41 on the winding roller 43 increases in winding diameter, the filter cloth 41 pushes the moving rod 451 downward. The moving rod 451 drives the fixing frame 457 to move downward. The fixing frame 457 drives the indicating plate 452 to move away from the housing 1. At the same time, the fixing frame 457 drives the fixing bracket 455 to move. When the filter cloth 41 on the release roller 42 is nearly used up and the winding roller 43 continues to wind, the fixing frame 457 drives the separating block 453 to move, so that the separating block 453 moves to abut against the separating plate 444 and drives the separating plate 444 to move. The separating plate 444 drives the driving motor 443 and the moving gear 442 to move downward and compress the return spring 446. After replacing the new winding roller 43, the return tension spring 456 drives the moving rod 451 and the indicating plate 452 to reset. The return spring 446 drives the driving motor 443 and the moving gear 442 to reset, and the moving gear 442 meshes with the fixed gear 441.

[0060] Embodiment 6, refer to Figures 1-11As shown in the figure, different from the above embodiments, a fixed air guide housing 6, a movable air guide housing 7 and a pressing air cylinder 8 are further arranged in the housing 1. The fixed air guide housing 6 is fixedly installed in the housing 1. The movable air guide housing 7 is slidably engaged with the fixed air guide housing 6. The pressing air cylinder 8 is fixedly installed on the fixed air guide housing 6, and the output end of the pressing air cylinder 8 is fixedly installed on the movable air guide housing 7.

[0061] The fan 2 introduces air flow into the fixed air guide housing 6 and discharges it through the movable air guide housing 7, the filter cloth 41 and the high-efficiency filter 3. When the filter cloth 41 is wound up, the pressing air cylinder 8 drives the movable air guide housing 7 to move upward, and the movable air guide housing 7 moves away from the filter cloth 41, enabling the filter cloth 41 to move. After the movement of the filter cloth 41 is completed, the pressing air cylinder 8 drives the movable air guide housing 7 to move downward to press the filter cloth 41, so that the air flow is filtered by the filter cloth 41 without leakage.

[0062] Embodiment 7, refer to Figures 1-11 As shown in the figure, different from the above embodiments, a fixed pressing housing 9 is fixedly installed in the housing 1. The filter cloth 41 abuts against the fixed pressing housing 9. The movable air guide housing 7 corresponds to the fixed pressing housing 9. The high-efficiency filter 3 is detachably installed in the housing 1, and the top of the high-efficiency filter 3 abuts against the fixed pressing housing 9.

[0063] The movable air guide housing 7 presses the filter cloth 41 against the fixed pressing housing 9 to prevent leakage.

[0064] Embodiment 8, refer to Figures 1-11 As shown in the figure, different from the above embodiments, stable grooves are formed on both sides of the fixing frame 455. A stable rod 10 is fixedly installed in the housing 1. The stable rod 10 is located in the stable groove and is slidably engaged with the stable groove. A plurality of stoppers 11 are fixedly installed in the housing 1. The stoppers 11 are located on both sides of the filter cloth 41. Two guiding rods 15 are rotatably connected in the housing 1. The guiding rods 15 abut against the top of the filter cloth 41.

[0065] The stable rod 10 makes the fixing frame 455 more stable and not easy to shake. The stoppers 11 prevent the filter cloth 41 from shifting and enable more accurate winding.

[0066] Embodiment 9, refer to Figures 1-11 As shown in the figure, different from the above embodiments, the fan 2 is installed in the fixed air guide housing 6. An air inlet is formed on the fixed air guide housing 6. A protective orifice plate 12 is fixedly installed at the position corresponding to the air inlet on the fixed air guide housing 6. A fixed handle 13 is fixedly installed on the top of the housing 1. An air outlet panel 14 is fixedly installed on the bottom of the housing 1. An air outlet is formed on the air outlet panel 14.

[0067] A filtering method for a laminar flow clean room using the above fan filtering device includes the following steps:

[0068] The fan 2 introduces the air flow into the housing 1. The air flow passes through the filter cloth 41 and the high-efficiency filter 3. The filter cloth 41 filters the large-particle dust in the air flow, and the high-efficiency filter 3 filters the small-particle dust in the air flow;

[0069] When the filtration efficiency of the filter cloth 41 decreases after the dust accumulates to a certain extent on it, the moving gear 442 rotates to drive the fixed gear 441 to rotate. 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;

[0070] The part of the filter cloth 41 with more accumulated dust is removed and wound up, and the clean part of the filter cloth 41 continues to participate in the filtration;

[0071] As more and more of the filter cloth 41 on the winding roller 43 is wound up and its diameter increases, the filter cloth 41 on the winding roller 43 pushes the moving rod 451 to move downward. The moving rod 451 drives the indicator board 452 to move downward, and the remaining situation of the filter cloth 41 can be judged by observing the position of the indicator board 452;

[0072] When the filter cloth 41 on the release roller 42 is nearly used up, the filter cloth 41 on the winding roller 43 pushes the moving rod 451. The moving rod 451 drives the disengaging block 453 to move. At this time, the disengaging block 453 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.

[0073] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall 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 blower 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 includes 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. Both the release roller and the winding roller are installed in the housing through a disassembly assembly; The primary filter assembly further includes a driving unit and an indicating unit. The driving unit includes a fixed gear and a moving gear. When the fixed gear rotates, it can drive the winding roller to rotate through the disassembly assembly. The moving gear meshes with the fixed gear and can drive the fixed gear to rotate; The indicating unit includes a moving rod, an indicating plate, and a disengaging block. The moving rod abuts against the bottom of the filter cloth on the winding roller. When the diameter of the filter cloth on the winding roller increases, it can push the moving rod to move downward. The moving rod can drive the indicating plate to move outside the housing. 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 disengages from the fixed gear; 2. The air blower filtering device according to claim 1, characterized in that: The indicating unit further includes a vibration shrapnel. When the disengaging block drives the moving gear to move away from the fixed gear, the moving gear contacts the vibration shrapnel. The rotation of the moving gear can drive the vibration shrapnel to deform and strike 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. The fixed plug rod is rotatably connected to the inner wall of the housing. The cross-section of the fixed plug rod is rectangular. The fixed gear is fixedly installed on the fixed plug rod. Slots are opened at both ends of the winding roller and the release roller. The cross-section of the slot is rectangular. The disassembly assembly further includes a moving plate, a compression spring, a moving plug rod, a telescopic rod, and a telescopic cylinder. The telescopic cylinder is fixedly installed on the inner wall of the housing. The telescopic rod is inserted into the telescopic cylinder. The moving plate is fixedly installed on the telescopic rod. One end of the compression spring is fixedly installed on the telescopic cylinder, and the other end is fixedly installed on the moving plate. The compression spring is sleeved on the telescopic rod. The moving plug rod is rotatably connected to the moving plate. The cross-section of the moving plug rod is rectangular; 4. A fan filter device according to claim 1, characterized in that: The driving unit further includes a driving motor, a disengaging plate, a guide rod, a return spring, and a fixing plate. The fixing plate is fixedly installed on the inner wall of the housing. The guide rod is fixedly installed on the fixing plate. The guide rod penetrates through the disengaging plate and is slidably matched with the disengaging plate. One end of the return spring is fixedly installed on the fixing plate, and the other end is fixedly installed on the disengaging plate. The return spring is sleeved on the guide rod. The driving motor is fixedly installed on the disengaging plate. 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 brackets, a reset tension spring and a fixing frame. One end of the reset tension spring is fixedly installed on the housing, and the other end of the reset tension spring is fixedly installed on the fixing bracket. The fixing frame is fixedly installed on the two fixing brackets. The moving rod is rotatably connected to the fixing frame. A moving hole is formed at the bottom of the housing. The fixing frame penetrates through the moving hole and is slidably matched with the moving hole. A dust-proof rubber strip is further arranged between the fixing frame and the moving hole. The indicating board is fixedly installed at the bottom of the fixing frame, and the separating block is fixedly installed on the fixing bracket.

6. The air blower filtering device according to claim 1, characterized in that: A fixed air guide housing, a moving air guide housing and a pressing air cylinder are further arranged in the housing. The fixed air guide housing is fixedly installed in the housing. The moving air guide housing is slidably matched with the fixed air guide housing. The pressing air cylinder is fixedly installed on the fixed air guide housing, and the output end of the pressing air cylinder is fixedly installed on the moving air guide housing.

7. The air blower filtering device according to claim 6, characterized in that: A fixed pressing housing is fixedly installed in the housing. The filter cloth abuts against the fixed pressing housing. The moving air guide housing corresponds to the fixed pressing housing. The high-efficiency filter is detachably installed in the housing, and the top of the high-efficiency filter abuts against the fixed pressing housing.

8. A fan filter device according to claim 5, characterized in that: Stable grooves are formed on both sides of the fixing bracket. A stable rod is fixedly installed in the housing. The stable rod is located in the stable groove and is slidably matched with the stable groove. A plurality of stoppers are fixedly installed in the housing. The stoppers are located on both sides of the filter cloth. Two guiding rods are rotatably connected in the housing. The guiding rods abut against the top of the filter cloth.

9. The air blower filtering device according to claim 6, wherein: The fan is installed in the fixed air guide housing. An air inlet is formed on the fixed air guide housing. A protective hole plate is fixedly installed at the position corresponding to the air inlet on the fixed air guide housing. A fixed handle is fixedly installed at the top of the housing. An air outlet panel is fixedly installed at the bottom of the housing, and an air outlet is formed on the air outlet panel.

10. A filtering method for a laminar flow clean room, which uses the fan filter device as described in any one of claims 1-9, characterized in that: It includes the following steps: The fan introduces air flow into the housing. The air flow passes through the filter cloth and the high-efficiency filter. The filter cloth filters large-particle dust in the air flow, and the high-efficiency filter filters small-particle dust in the air flow. When the dust accumulation on the filter cloth reaches a certain level and the filtration efficiency decreases, the moving gear rotates to drive the fixed gear to rotate. 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 wound up, and the clean part of the filter cloth continues to participate in filtration. As more and more filter cloth on the winding roller is wound up and the diameter increases, the filter cloth on the winding roller pushes the moving rod to move downward. The moving rod drives the indicating board to move downward, and the remaining situation of the filter cloth can be judged by observing the position of the indicating board. When the filter cloth on the release roller is almost used up, the filter cloth on the winding roller pushes the moving rod. The moving rod drives the separating block to move. At this time, the separating block 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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