Roller blind filter and method of use thereof

Abstract

The application discloses a roller shutter type filter and a use method, and relates to the technical field of air filtration. The filter comprises a rack, upper and lower winding boxes, upper and lower winding shafts, two driving modules, a flexible belt wound around the upper winding shaft and a filter core clamp head. The lower winding shaft is detachably arranged in the lower winding box. An electromagnetic clutch is arranged between each driving module and the corresponding winding shaft. When new material is added, the filter core clamp head clamps a filter core material head, and the upper winding shaft winds the flexible belt to pull the filter material upward to form a roll. When the material is replaced, the lower winding shaft actively winds, and the upper winding shaft follows to unwind. When the clutch is separated, the rigid connection between the driven end and the driving module is cut off, the unwinding resistance is greatly reduced, and the filter material is prevented from being deformed due to excessive tension. When the clutch is attracted, the inertia of the unwinding end is inhibited by using the structural resistance of the driving module, and the filter material is prevented from being excessively released to cause relaxation. The application concentrates all the material replacement operations at a low place, eliminates the climbing operation, avoids secondary dust pollution, and realizes stable and reliable material replacement.

Description

Technical Field

[0001] This application relates to the field of air filtration technology, and more specifically, to a roller shutter filter and its usage method. Background Technology

[0002] Roller shutter filters are widely used in industrial dust removal, air conditioning and ventilation system pre-filtration, and other scenarios due to their advantages such as large filtration area and automatic filter media replacement.

[0003] For example, Chinese utility model patent CN201949755U discloses a wound air filter, which includes a support, a feeding shaft, a discharging shaft, a feeding shaft drive device, a feeding cloth, and new filter media. The feeding shaft is installed on the upper end of the support, and a feeding shaft drive device is provided at one end of the feeding shaft. The discharging shaft is installed on the lower end of the support, and a discharging shaft drive device is provided above one end of the discharging shaft. One end of the feeding cloth is fixed to the feeding shaft, and the other end extends vertically along the rear side of the support to the vicinity of the discharging shaft, and this end is provided with a strap hole or hook and loop fastener. The new filter media can be connected to the feeding cloth by means of cable ties or hook and loop fasteners. This solution uses the feeding cloth to pull the new filter media from the feeding shaft to the discharging shaft, realizing the material replacement operation can be completed on the ground without climbing, which reduces the operation difficulty and safety risks to a certain extent.

[0004] However, the aforementioned existing technology still has the following shortcomings: First, in this scheme, the feeding shaft and the unloading shaft are driven by independent drive devices, but during the material changing process, there is a lack of effective coordination and control mechanism between the two drive devices. When one drive device actively winds up, the other end acts as the driven unwinding end. The driven end includes the drive device, the transmission structure, and the unwinding shaft. The unwinding resistance of the driven end includes the resistance generated by the structural characteristics of the drive device itself (this resistance is usually large, especially for drive devices with reducers), the resistance generated by the structural characteristics of the transmission structure connecting the drive device and the unwinding shaft, and the resistance generated by the weight of the filter material on the unwinding shaft. The sum of these inherent resistances leads to a large total unwinding resistance, resulting in poor unwinding, and the filter material is easily pulled, deformed, or even torn, affecting the filtration effect and the normal operation of the equipment. Secondly, when the unwinding end rotates under the tension of the filter media, the unwinding end is prone to continue rotating due to inertia when the active end stops winding, releasing excess filter media. This causes the filter media to accumulate or loosen in the filter media channel, which in turn affects the flatness and sealing of the filtration functional area and reduces the filtration efficiency. Summary of the Invention

[0005] This application aims to provide a roller shutter filter that solves the technical problems of existing roller shutter filters during the material replacement process, such as the lack of coordinated control between the two drive shafts, excessive resistance at the unwinding end leading to filter media stretching and deformation, and excessive inertia at the unwinding end leading to filter media loosening and accumulation.

[0006] This application achieves the above objective through the following technical solution: a roller shutter type filter, comprising: The frame has a filter media channel that runs vertically through it. The first take-up box is fixedly installed at the upper end of the frame, and an upper winding shaft is rotatably installed inside it; The second take-up box is fixedly installed at the lower end of the frame, and a detachable lower roll is rotatably installed inside it; The first drive module is used to drive the upper scroll to rotate; The second drive module is used to drive the lower roll shaft to rotate. A filter cartridge chuck is used to hold the filter cartridge head and is fixedly connected to the upper winding shaft via a flexible belt. A first electromagnetic clutch is disposed between the first drive module and the upper reel, and is configured to disconnect the connection between the first drive module and the upper reel when the upper reel is a driven shaft; A second electromagnetic clutch is disposed between the second drive module and the lower reel, and is configured to disconnect the connection between the second drive module and the lower reel when the lower reel is a driven shaft.

[0007] Furthermore, the first winding box is also provided with a damping element. When the upper winding shaft is unwound as a driven shaft, the damping element abuts against the outer peripheral surface of the filter material roll wound on the upper winding shaft.

[0008] Furthermore, a first drive wheel is rotatably disposed inside the second winding box. The first drive wheel is connected to the output end of the second drive module. A first mounting tube is fixedly disposed on the end face of the first drive wheel facing the lower winding shaft. One end of the lower winding shaft is detachably inserted into the first mounting tube and is circumferentially fixed.

[0009] Furthermore, a shaft seat block is rotatably provided at the end of the lower winding shaft away from the first mounting tube seat, and a mounting support is fixedly provided inside the second winding box. The mounting support is provided with an upward-facing mounting slot, and the shaft seat block is detachably placed in the mounting slot.

[0010] Furthermore, a second mounting tube is rotatably disposed inside the second winding box on the other side relative to the first mounting tube, and the other end of the lower winding shaft is detachably inserted into the second mounting tube and is circumferentially fixed.

[0011] Furthermore, it also includes a controller, an encoder electrically connected to the controller, a differential pressure switch, and / or a timing module; the sensing end of the encoder makes rolling contact with the surface of the filter media passing through the filter media channel; when the signal collected by any one of the encoder, the differential pressure switch, and the timing module reaches the set trigger condition, the controller controls the first drive module and the second drive module to start or stop, and simultaneously controls the first clutch and the second electromagnetic clutch to engage or disengage accordingly.

[0012] Furthermore, the set trigger conditions include: Condition 1: The encoder detects that the filter media has moved to a set length; Condition 2: The pressure difference detected by the differential pressure switch reaches the set differential pressure value; Condition 3: The timing module reaches the set duration.

[0013] Furthermore, the filter element clamp includes a support crossbar and a plurality of locking components spaced apart along the length of the support crossbar; the locking components include studs fixed on the support crossbar, pressure plates that press the filter media surface, and nuts that cooperate with the studs; the free end of the flexible belt is fixedly connected to the support crossbar.

[0014] Furthermore, the filter element clamp is fixed to the filter element head using a tape-rolling or hook-and-loop fastener method.

[0015] Another object of the present invention is to provide a method of using a roller shutter filter as described above, comprising: S1. Adding new materials: S11. Take the lower roll out of the second winding box, pass it through the center hole of the new roll filter material, and then install the lower roll together with the roll filter material back into the second winding box. S12. The filter cartridge clamp is used to clamp the filter cartridge head of the rolled filter material; S13. Control the first electromagnetic clutch to engage and the second electromagnetic clutch to disengage, start the first drive module to drive the upper winding shaft to rotate, and wind up the flexible belt. The filter element head is pulled upward by the filter element chuck, so that the rolled filter material is gradually unwound and gradually transferred from the second winding box to the first winding box, and then rewound onto the upper winding shaft. S14. When the rolled filter material is unwound to the end, fix the filter element tail to the lower roll shaft; S15. Continue unwinding until the rolled filter material is completely unwound. The first drive module stops, and the new material feeding operation is completed. S2. Automatic material changing: S21. The equipment is operating normally, and the rolled filter material filters the air; S22. When the material replacement trigger condition is met, control the second electromagnetic clutch to engage and the first electromagnetic clutch to disengage, start the second drive module to drive the lower winding shaft to rotate, and rewind the used filter material. At the same time, the filter material pulls the upper winding shaft to unwind, so that the new filter material is released into the filtration function area. S23. During the material replacement process, the moving length of the filter material is monitored in real time. When the moving length reaches the preset single material replacement length, the second drive module stops, and one filter material update is completed. S24. Repeat steps S22 to S23 until all the rolled filter media is used up.

[0016] S3. Unloading of old materials and replacement of new materials: S31. When all the rolled filter material is used up, the filter element clamp is wound up onto the lower roller along with the filter element head, and a material shortage alarm signal is issued. S32. At the second winding box located at the lower position, loosen the connection between the filter element head and the filter element clamp, remove the lower winding from the second winding box, and unload the lower winding with the old filter element roll. S33. Repeat steps S11 to S15 to complete a new round of new material feeding operation.

[0017] Furthermore, the material change triggering condition in step S22 is any one or a combination of the following: The pressure difference between the air inlet and outlet sides of the filter material, detected by the differential pressure switch, reaches a preset threshold. The cumulative usage time of the filter media, as recorded by the timing module, reaches a preset threshold.

[0018] Compared with the prior art, the beneficial effects of the roller shutter filter and its usage method in this application are as follows: (1) A dual-shaft coordinated drive system was constructed using an electromagnetic clutch as the core technology. First, by disengaging the clutch, the rigid connection between the driven end and the drive module is severed, significantly reducing the unwinding resistance and preventing the filter material from being stretched and deformed due to excessive tension. Second, by engaging the clutch, the structural resistance of the drive module itself is used to suppress the inertia of the unwinding end, preventing excessive release of the filter material and resulting in slack. The primary and secondary clutches work together to ensure the safety and cleanliness of the filter material replacement process while achieving stable and reliable operation.

[0019] (2) Automation and precise control of filter material replacement have been achieved. Through the coordinated operation of the controller, differential pressure switch, timing module and encoder, fully automatic control and precise length measurement of filter material replacement have been achieved. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of this application; Figure 2 This is a schematic diagram of the structure after removing the first and second winding box protective covers in the embodiment of this application; Figure 3 This is a partial structural diagram of the active side of the second winding box in an embodiment of this application; Figure 4 This is one of the partial structural diagrams of the driven side of the second winding box in the embodiments of this application, wherein a mounting support is provided on one inner wall of the second winding box; Figure 5 This is a cross-sectional structural diagram of the driven end of the lower roller and the mounting bracket being installed in an embodiment of this application; Figure 6 This is a second partial structural schematic diagram of the driven side of the second winding box in an embodiment of this application, wherein a second mounting tube seat is provided on one inner wall of the second winding box; Figure 7 This is a partial structural diagram of one side of the first winding box in an embodiment of this application; Figure 8 This is a schematic diagram of the process of transferring all the new filter material from the lower roll to the upper roll in an embodiment of this application; Figure 9 This is a schematic diagram of the structure after all the new filter material has been transferred from the lower roll to the upper roll in an embodiment of this application; Figure 10 This is a schematic diagram showing the state after all the new filter media in this embodiment of the application has been used up; Figure 11 This is a partial structural diagram of the filter clip in an embodiment of this application; The numbers in the image indicate: 100 - Roller shutter filter; 200 - Filter media; 201 - Filter cartridge head; 202 - Filter cartridge tail.

[0021] 1-Frame, 11-Filter media channel, 12-Facing net; 2-First winding box, 21-Second drive wheel, 22-Damping component; 3-Second winding box, 31-First drive wheel, 32-First mounting tube seat, 33-Mounting support, 331-Mounting slot, 34-Second mounting tube seat; 4-Upper winding shaft; 5-First drive module, 51-First electromagnetic clutch, 52-First power source output wheel; 6-Lower winding shaft, 61-Shaft seat block; 7-Second drive module, 71-Second electromagnetic clutch, 72-Second power source output wheel; 8-Flexible belt, 9-Filter element clamp, 91-Support crossbar, 92-Locking assembly, 921-Stud, 922-Pressure plate, 923-Nut; 10-Filtration functional area; 20-Controller; 30-Differential pressure switch; 40-Encoder. Specific Implementation

[0022] Example 1 Please refer to Figures 1-11This embodiment is a roller shutter type filter 100, which includes a frame 1, a first winding box 2 and a second winding box 3 respectively disposed at the upper and lower ends of the frame 1, an upper winding shaft 4 disposed in the first winding box 2, a first drive module 5 for driving the upper winding shaft 4 to rotate, a lower winding shaft 6 disposed in the second winding box 3, a second drive module 7 for driving the lower winding shaft 6 to rotate, a flexible belt 8 with one end wound around and fixed to the upper winding shaft 4, and a filter element clamp 9 fixed to the free end of the flexible belt 8 for clamping the filter element head; the lower winding shaft 6 is rotatably disposed in the second winding box 3 in a detachable manner.

[0023] As the filtration area of ​​vertical filters increases, the replacement of old and new filter media presents new challenges for users. On the one hand, the larger the size of the vertical filter, the greater its height. Whether collecting material from the bottom or top, when the working height for the replacement operation exceeds 1.8 meters, the replacement of old and new filter media inevitably constitutes high-altitude work. Therefore, the safety requirements increase significantly, greatly increasing the difficulty and cost of the user's replacement operation. On the other hand, after the old filter media is covered with dust, its weight increases significantly. When collecting material from the top, the weight of the old filter media greatly increases the difficulty for operators working at height, and there is also a risk of injury from falling objects.

[0024] To address the aforementioned technical issues, this embodiment first employs two drive modules (first drive module 5 and second drive module 7) to drive the upper winding shaft 4 and lower winding shaft 6 to rotate, enabling both to perform active winding operations. Furthermore, a flexible belt 8 and a filter cartridge clamp 9 positioned at the free end of the flexible belt 8 are used to transfer the winding position of the rolled filter media between the upper winding shaft 4 and the lower winding shaft 6. This allows for easy loading of new filter media or unloading of old filter media at the height of the lower winding shaft 6, eliminating the need for high-altitude operations and improving the safety of filter media replacement. Simultaneously, unloading old filter media at the height of the lower winding shaft 6 reduces labor intensity and saves time and effort.

[0025] Specifically, when adding new filter media, the new roll filter media 200 has a mandrel at its center. The operator removes the mandrel, then takes the lower roll 6 from the second winding box 3 and inserts it into the center of the roll filter media 200; then the lower roll 6 and the roll filter media 200 are placed together into the second winding box 3 to complete the feeding of the new roll filter media; initially, the flexible belt 8 is in the unwinding state, and the filter cartridge clamp 9 is located in a low position near the second winding box 3, clamping the filter cartridge head 201 of the roll filter media 200 to fix the filter cartridge head; the filter cartridge tail 202 of the roll filter media 200 is fixed on the lower roll 6 to fix the filter cartridge tail; the first drive module 5 drives the upper roll 2. 4. Rotate to perform a winding operation on the flexible belt 8. Under the clamping action of the filter element head 201 of the roll filter material 200, it moves upward together with the filter element clamp 9 and is passively rolled onto the upper winding shaft 4 along with the winding action of the flexible belt 8, until all the roll filter material 200 on the lower winding shaft 6 is unwound, completing the feeding work before the new roll filter material is used for filtration. At this time, the filter element tail 202 of the filter material 200 is fixed on the lower winding shaft 6, and part of the remaining filter material 200 is in a flat state and located between the first winding box 2 and the second winding box 3, forming the filtration functional area 10 of the roll-up filter 100. The remaining filter material 200 is rolled up in the first winding box 2.

[0026] During use, the filter media 200 in the filtration function area 10 will gradually become full of dust. When the set conditions are reached, the filter media 200 in the filtration function area 10 needs to be replaced. The second drive module 7 drives the lower winding shaft 6 to rotate, and the filter media 200 full of dust is wound into the second winding box 3 for old material recycling. The new filter media wound in the first winding box 2 will be unwound and output into the filtration function area 10. When all the filter media in the filtration function area 10 are newly output filter media, the automatic replacement of the filter media in the filtration function area 10 is completed.

[0027] When the new filter media in the first winding box 2 is used up, the second drive module 7 drives the lower winding shaft 6 to rotate, so that the last piece of old filter media located in the filtration functional area 10 is wound into the second winding box 3. The filter element clamp 9 will be wound onto the lower winding shaft 6 together with the filter element head 201. At this time, the operator only needs to unload the old roll filter media in the lower winding box 3, and then replace the new roll filter media into the second winding box 3, repeating the entire process of new filter media feeding.

[0028] The replacement of the old and new filter media can be carried out without the need for operators to climb to heights or lift heavy objects, which greatly improves the convenience and safety of the replacement. In addition, the replacement of the old and new filter media is carried out in the second winding box 3 located at a low position, which saves more time and effort.

[0029] The frame 1 has a hollow frame structure, with a filter media channel 11 that runs vertically through the frame and covers the filtration functional area 10. The frame 1 has protective mesh 12 on both the air outlet and air inlet sides to limit the deformation of the filter media under wind pressure while ensuring airflow. The first winding box 2 and the second winding box 3 are fixedly installed at the upper and lower ends of the frame 1. The filter media located in the filtration functional area 10 is confined within the filter media channel 11, with its upper end wound or fixed in the first winding box 2 and its lower end wound or fixed in the second winding box 3.

[0030] The protective mesh 12 restricts the front and rear positions of the filter media 200 in the filter media channel 11; the left and right frame bodies of the frame 1 restrict the left and right positions of the filter media 200 in the filter media channel 11, and the upper and lower positions of the filter media 200 in the filter media channel 11 are constrained by the upper roller 4 and the lower roller 6 respectively, thereby ensuring the stability of the position of the filter media 200 in the filter media channel 11.

[0031] To enable the second drive module 7 to rotate the lower reel 6 and to allow for the detachable installation of the lower reel 6, a first drive wheel 31 is rotatably mounted inside the second winding box 3. The output end of the second drive module 7 is connected to the first drive wheel 31 via a transmission component (not shown in the figure), converting the rotational motion of the output end of the second drive module 7 into the rotational motion of the first drive wheel 31. A first mounting tube seat 32 for receiving the end of the lower reel 6 is fixedly mounted on the side face of the first drive wheel 31 facing the lower reel 6, and one end of the lower reel 6 is inserted into the first mounting tube seat 32. The first drive wheel 31 is rotatably mounted on a bearing on the left or right side wall of the second winding box 3. For example, the transmission component can be a belt, synchronous belt, chain, or coupling, etc.

[0032] In one embodiment, the cross-section of the lower roller 6 is non-circular, preferably a square tube. The cross-sectional shape of the first mounting tube seat 32 is designed to mimic the cross-sectional shape of the lower roller 6 so that when the first drive wheel 31 rotates, it drives the first mounting tube seat 32 and the lower roller 6 to rotate synchronously together. At the same time, it also makes it convenient for the lower roller 6 to be inserted into or removed from the first mounting tube seat 32.

[0033] In some other embodiments, the cross-section of the lower spool 6 can also be circular, and the cross-section of the first mounting tube 32 is also circular. The lower spool 6 and the first mounting tube 32 are positioned axially and rotated synchronously by means of a pin that traverses radially.

[0034] Regarding the mounting structure at both ends of the lower reel 6, one end is connected to the first mounting tube seat 32 as the active rotating end, and the other end is the driven end. The synchronous rotation connection and detachable connection structure of the active end of the lower reel 6 have been clearly described above. The connection structure of the driven end of the lower reel 6 is explained in detail below: In one embodiment, a bearing block 61 is rotatably mounted on the end of the lower reel 6 away from the first mounting tube 32. A mounting support 33 for mounting the bearing block 61 is fixedly mounted on the other side of the second take-up box 3, opposite to the first mounting tube 32. The mounting support 33 has a mounting slot 331 for receiving the bearing block 61, with an upward-facing inlet and outlet (not shown in the figure). One end of the lower reel 6 is synchronously and rotatably mounted on the first mounting tube 32, while the other end is mounted in the mounting slot 331 of the mounting support 33 via the bearing block 61. The design of the bearing block 61 enables a follow-up structure design for one end of the lower reel 6. When installing the lower reel 6, its active end is first inserted into the first mounting tube 32, and then the other end sits in the mounting slot 331 via the bearing block 61. When the second drive module 7 drives the first drive wheel 31 to rotate, the lower reel 6 rotates synchronously with the first mounting tube 32 because the active end of the lower reel 6 is synchronously connected to the first mounting tube 32, and the driven end of the lower reel 6 is rotatably mounted on the bearing block 61 via a bearing, and then rotatably mounted on the mounting support 33. Therefore, the lower reel 6 rotates synchronously with the first drive wheel 31. In one embodiment, the bearing block 61 is non-circular in shape, preferably square; the mounting slot 331 is a V-shaped slot that conforms to the shape of the bearing block 61. In some other embodiments, the bearing block 61 is circular in shape, and the mounting slot 331 is a U-shaped slot, a V-shaped slot, or a square slot. In still other embodiments, a clamping mechanism can be provided on the mounting support 33 to clamp and fix the bearing block 61 on the mounting support 33.

[0035] In some other embodiments, a second mounting base 34 is rotatably disposed inside the second winding box 3 on the other side relative to the first mounting base 32. The lower winding shaft 6 adopts a non-circular cross-section structure to achieve synchronous rotational connection with the second mounting base 34, or adopts a radial through-hole pin method to achieve synchronous rotational connection with the second mounting base 34. When installing the lower winding shaft 6, first insert one end of the lower winding shaft 6 into the first mounting base 32 and insert it axially to the bottom so that the other end of the lower winding shaft 6 can be aligned with the open end of the second mounting base 34; then insert the other end of the lower winding shaft 6 into the second mounting base 34, and then adjust the axial position. The axial position of the lower winding shaft 6 is fixed on the mounting base by radial insertion of pins at both ends, preventing it from axially disengaging.

[0036] A second drive wheel 21 is rotatably mounted inside the first winding box 2. One end of the upper winding shaft 4 is synchronously connected to the second drive wheel 21, while the other end is rotatably mounted on the side wall of the first winding box 2. The output end of the first drive module 5 is connected to the second drive wheel 21 via a transmission component (not shown in the figure), converting the rotational motion of the output end of the first drive module 5 into the rotational motion of the second drive wheel 21. The second drive wheel 21 is rotatably mounted on a bearing on a side wall of the left or right side of the first winding box 2. For example, the transmission component can be a belt, synchronous belt, chain, or coupling, etc.

[0037] During use, the upper roller 4 and the lower roller 6 always work together, with one winding up and the other unwinding. For example, when the upper roller 4 unwinds to release new filter media, the lower roller 6 winds up to recycle the old filter media. However, as the amount of filter media on the unwinding shaft (such as the upper shaft 4) gradually decreases, the winding radius of the rolled filter media will also gradually decrease, while the winding radius of the filter media on the rewinding shaft (such as the lower shaft 6) will gradually increase. If the upper shaft 4 and the lower shaft 6 always use the same rotation speed for unwinding and rewinding, when the radius of the filter media on the unwinding shaft is greater than that on the rewinding shaft, it will cause the unwinding to be too fast and the rewinding to be too slow. This will easily lead to the filter media becoming crowded, blocked, or stuck in the filter media channel 11. When the rewinding shaft continues to rewind, the accumulation and compression of the filter media in the filter media channel 11 will easily cause the filter media to be stretched, resulting in filter media deformation and the risk of affecting the filtration effect. When the radius of the filter media on the rewinding shaft is greater than that on the unwinding shaft, the phenomenon of winding too fast and unwinding to be too slow will occur, which will directly lead to the stretching of the filter media, and there is also the risk of filter media deformation and the impact on the filtration effect.

[0038] However, if the winding and unwinding speeds of the upper roller 4 and the lower roller 6 are dynamically adjusted in real time, the thickness of the new filter material and the thickness of the old filter material after it is full of dust need to be taken into account. These parameters are unstable and unpredictable, especially the thickness of the old filter material after it is full of dust, which is difficult to control in the program.

[0039] If the first drive module 5 and the second drive module 7 are used, with one as the active end and the other as the driven end, for example, if the second drive module 7 is activated while the first drive module 5 is not activated, although the filter material can always be wound up on the lower winding shaft 6 in a taut state, due to the structural characteristics of the drive module itself, especially the drive module with an internal reducer, a large resistance will be generated at the driven end. The sources of this resistance include the following: (1) Internal frictional resistance of the reducer, such as gear meshing friction, bearing friction, lubricating oil viscous resistance, etc.; (2) The resistance of the motor itself, such as the cogging torque of the permanent magnet motor, the viscous damping of the motor, the resistance of the power-off brake, the back electromotive force effect, etc. (3) Mechanical frictional resistance between the spool and the transmission structure, such as bearing friction and transmission component friction.

[0040] The structural characteristics of the drive module itself and the resistance generated by the transmission structure can easily cause the filter media to overcome a large resistance when it is pulled to rotate the upper winding shaft 4 at the driven end. This can easily lead to the filter media being stretched and deformed, thus affecting the filtration effect.

[0041] To address the aforementioned technical issues and ensure that the speed at which the upper roller 4 releases filter media is consistent with the speed at which the lower roller 6 releases filter media, while simultaneously reducing the follow-up resistance at the driven end and preventing filter media pulling, this embodiment employs a first electromagnetic clutch 51 between the first drive module 5 and the upper roller 4, and a second electromagnetic clutch 71 between the second drive module 7 and the lower roller 6. These electromagnetic clutches control the drive connection and disconnection between the drive modules and the rollers. The first and second electromagnetic clutches 51 enable automatic switching between the active and driven ends. Furthermore, by disengaging the drive modules from the rollers, the resistance of the driven end drive device is completely eliminated, leaving only the weight of the filter media on the roller as resistance at the driven end. This significantly reduces the unwinding resistance at the driven end, effectively preventing filter media pulling and deformation caused by excessive unwinding resistance at the driven end during winding at the active end and unwinding at the driven end, thereby ensuring effective filtration.

[0042] When the upper winding shaft 4 is used as the take-up shaft, the first electromagnetic clutch 51 remains engaged, transmitting the rotational torque of the first drive module 5 to the upper winding shaft 4, while the second electromagnetic clutch 71 remains disengaged, making the lower winding shaft 6 the driven shaft. As the upper winding shaft 4 rewinds, it unwinds accordingly. The unwinding resistance at the driven unwinding end is only the resistance generated by the weight of the filter material on the lower winding shaft 6, greatly reducing the unwinding resistance. Similarly, when the lower winding shaft 6 is used as the take-up shaft, the second electromagnetic clutch 71 remains engaged, transmitting the rotational torque of the second drive module 7 to the lower winding shaft 6, while the first electromagnetic clutch 51 remains disengaged, making the upper winding shaft 4 the driven shaft. As the lower winding shaft 6 rewinds, it unwinds accordingly. The unwinding resistance at the driven unwinding end is only the resistance generated by the weight of the filter material on the upper winding shaft 4, greatly reducing the unwinding resistance. The first electromagnetic clutch 51 and the second electromagnetic clutch 71 can be purchased directly from the market, such as the single-friction plate electromagnetic clutch from Nanjing Gongnuo Technology Co., Ltd. Therefore, the specific structures of the first electromagnetic clutch 51 and the second electromagnetic clutch 71 will not be described in detail in this embodiment.

[0043] In this embodiment, one side of the first electromagnetic clutch 51 is fixedly connected to the output shaft of the first drive module 5, and the other side is fixedly provided with a first power source output wheel 52 as the output side. The first power source output wheel 52 is driven by the second drive wheel 21 through a transmission component. Similarly, one side of the second electromagnetic clutch 71 is fixedly connected to the output shaft of the second drive module 7, and the other side is fixedly provided with a second power source output wheel 72 as the output side. The second power source output wheel 72 is driven by the first drive wheel 31 through a transmission component.

[0044] When the lower reel 6 acts as the take-up reel, in order to prevent the upper reel 4, as the driven end, from releasing too much filter media due to inertia under the tension of the filter media, this embodiment provides two damping schemes: Option 1: This is achieved by switching the first electromagnetic clutch 51 from a disengaged state to an engaged state. During the filter media replacement process, the second drive module 7 starts, driving the lower winding shaft 6 to actively wind up. The first electromagnetic clutch 51 disengages, causing the upper winding shaft 4 to unwind accordingly. When one filter media replacement is completed, the second drive module 7 stops, and simultaneously controls the first electromagnetic clutch 51 to engage, reconnecting the upper winding shaft 4 with the first drive module 5. At this time, the structural resistance of the first drive module 5 (especially its reducer) and the structural resistance of the transmission structure—including the gear meshing friction resistance, bearing friction resistance, lubricating oil viscous resistance, the motor's own cogging torque and viscous damping, and the frictional resistance between the transmission components and the transmission wheel—work together on the upper winding shaft 4, forming effective rotational resistance, thereby preventing the upper winding shaft 4 from continuing to rotate and release excess filter media due to inertia. This option utilizes the inherent structural characteristics of the first drive module 5, achieving the damping function without adding additional components.

[0045] Option 2: An independent damping element 22 is installed inside the first winding box 2. In this embodiment, the damping element 22 is a pressure plate. One end of the pressure plate is rotatably disposed inside the first winding box 2, and the other opposite end overlaps the outer peripheral surface of the upper winding shaft 4 (when filter material is wound on the upper winding shaft 4, one end of the pressure plate overlaps the outer peripheral surface of the rolled filter material). It is used to provide frictional damping for the unwinding rotation of the rolled filter material, thereby reducing its rotational release inertia and preventing the filter material from accumulating or loosening in the filter material channel 11 due to excessive unwinding.

[0046] The two solutions described above can be used individually or in combination. In practical applications, if the inherent structural resistance of the first drive module 5 is insufficient to completely suppress the inertial rotation of the upper winding shaft 4, the damping component 22 can be used to provide additional damping force to achieve the best anti-inertial unwinding effect.

[0047] In this embodiment, the roller shutter filter 100 also includes a controller 20 that is electrically connected to the first drive module 5, the second drive module 7, the first electromagnetic clutch 51, and the second electromagnetic clutch 71. The controller 20 has a built-in control program to control the working process of the roller shutter filter 100.

[0048] This embodiment also includes a differential pressure switch 30 mounted on the frame 1 and electrically connected to the controller 20. The differential pressure switch 30 detects the pressure difference between the air inlet and outlet sides of the filter media. When the pressure difference reaches the set differential pressure value, the controller 20 controls the second drive module 7 to drive the lower winding shaft 6 to perform a winding operation, and the upper winding shaft 4 follows suit to unwind, thereby realizing the automatic renewal of the filter media in the filtration functional area 10.

[0049] To improve user flexibility, the controller 20 in this embodiment also includes a built-in timing module (not shown in the figure). The timing module is configured to time the usage time of the filter media in the filtration functional area 10. When the usage time of the filter media recorded by the timing module reaches the set time, the controller 20 controls the second drive module 7 to drive the lower winding shaft 6 to perform a winding operation, and the upper winding shaft 4 follows suit to unwind, thereby realizing the automatic renewal of the filter media in the filtration functional area 10.

[0050] The differential pressure switch 30 and the timing module can be used independently or in combination as needed. When used in combination, they enable dual monitoring of automatic filter media replacement. When either condition is triggered, the automatic filter media update program is started to ensure that the filter media is updated at the optimal time.

[0051] To precisely control the length of automatic filter media replacement and avoid filter media waste, this embodiment also includes an encoder 40 electrically connected to the controller 20. The sensing end of the encoder 40 is set in close contact with the surface of the filter media in the filter functional area 10. As the filter media moves within the filter functional area 10, the encoder 40 rotates, thereby recording the length of the filter media movement. When the filter media movement length reaches the set length, the second drive module 7 stops driving the lower winding shaft 6 to rewind (automatic filter media update process), or the first drive module 5 stops driving the upper winding shaft 4 to rewind (new filter media feeding process).

[0052] The flexible belt 8 serves as a connection structure between the filter element chuck 9 and the upper winding shaft 4, and also guides the filter element chuck 9 to wind the filter material onto the upper winding shaft 4.

[0053] The structure of the filter cartridge clamp 9 is not limited in this embodiment, as long as it can clamp the filter media head. In some embodiments, the filter cartridge clamp 9 includes a support crossbar 91 and a plurality of locking components 92 spaced apart along the length of the support crossbar 91; the locking components include studs 921 fixed on the support crossbar 91, pressure plates 922, and nuts 923 that cooperate with the studs 921. The free end of the flexible band 8 is fixedly connected to the support crossbar 91. In use, the studs 921 are inserted from one side of the filter media to the other side at the filter media head position, then the pressure plates 922 are fitted onto the studs 921 to press-cast the filter media surface, and then the nuts 923 are locked onto the studs 921 to achieve the clamping effect on the filter media head.

[0054] In other embodiments, the filter element clamp 9 uses a tape-rolling or hook-and-loop fastener method to fix the filter element head 201.

[0055] The roller shutter filter 100 provided in this embodiment is used in the following steps: I. Initial State The equipment is in standby mode, the flexible belt 8 is in the unwinding and release state, and the filter cartridge chuck 9 is located in a low position near the second winding box 3. No filter material is wound in the first winding box 2, and no rolled filter material 200 is installed in the second winding box 3.

[0056] 2. Operation of loading new materials Step 101: Take the lower roll 6 out of the second winding box 3, pull out the mandrel in the center of the new roll filter material 200, and pass the lower roll 6 through the center hole of the roll filter material 200. Step 102: Install the lower roll 6 together with the rolled filter material 200 back into the second winding box 3; insert one end of the lower roll 6 into the first mounting tube seat 32, and place the other end in the mounting slot 331 of the mounting support 33 through the shaft seat block 61 (or insert it into the second mounting tube seat 34), and fix the axial position. Step 103: Clamp the filter cartridge head 201 of the rolled filter media 200 with the filter cartridge clamp 9; Step 104: Control the first electromagnetic clutch 51 to engage via controller 20, and simultaneously control the second electromagnetic clutch 71 to disengage; Step 105: Start the first drive module 5 to drive the upper winding shaft 4 to rotate and wind up the flexible belt 8; Step 106: The flexible belt 8 drives the filter element chuck 9 to move upward, and the filter element chuck 9 pulls the filter element head 201 to move upward together. The rolled filter material 200 is gradually unwound and unfolded. The rolled filter material 200 is transferred from the second winding box 3 to the first winding box 2 and rewound in the first winding box 2. Step S107: In the final stage of the roll filter material 200 being gradually transferred from the second winding box 3 to the first winding box 2, the filter element tail 202 of the roll filter material 200 is fixed on the lower winding shaft 6 by a stripping method. Step 108: When the roll filter material 200 is unwound, its filter element tail 202 is still fixed on the lower winding shaft 6. The main body of the filter material is laid flat in the filter material channel 11 of the frame 1 to form the filtration functional area 10. The remaining filter material is rolled up in the first winding box 2. The first drive module 5 stops, and the new material loading operation is completed.

[0057] III. Filtration Application and Automatic Material Change Step 201: The equipment is running normally. Air flows through the filtration functional area 10, and the filter media 200 filters the air. Step 202: Controller 20 monitors the material change trigger conditions in real time, including the following three modes: Differential pressure control mode: Differential pressure switch 30 detects the pressure difference between the air inlet side and the air outlet side of the filter media. When the pressure difference reaches the set threshold, it triggers the material replacement. Time control mode: The timer module records the cumulative usage time of the filter media. When the usage time reaches the set threshold, the media replacement is triggered. Dual control mode: differential pressure and timing are activated simultaneously, and material change is triggered when either condition is met; Step 203: When the material change condition is triggered, the controller 20 controls the second electromagnetic clutch 71 to engage and at the same time controls the first electromagnetic clutch 51 to disengage. Step 204: Start the second drive module 7 to drive the lower roll 6 to rotate and rewind the dirty filter media used in the filter functional area 10. Step 205: While the lower reel 6 is winding up the dirty filter media, the upper reel 4 is unwound by the filter media, and the new filter media in the first winding box 2 is released into the filtration functional area 10. During this process, the damping element 22 (if provided) abuts against the outer circumferential surface of the filter media roll on the upper reel 4 to provide frictional damping and prevent the follower end from unwinding too quickly due to inertia. When the new filter media is released into place, the first electromagnetic clutch 51 is engaged, and the inherent structural resistance of the first drive module 5 is used to prevent the upper reel 4 from continuing to rotate due to inertia. Step 206: During the material replacement process, the sensing end of the encoder 40 rolls and contacts the filter material surface to monitor the moving length of the filter material in real time. When the moving length reaches the preset single material replacement length, the controller 20 controls the second drive module 7 to stop, completing one filter material update. Step 207: Repeat steps 202 to 206 until all the new filter media in the first winding box 2 has been used up.

[0058] IV. Unloading of old materials and replacement of new materials Step 301: When all the new filter media in the first winding box 2 has been used up, the last piece of old filter media located in the filtration functional area 10 is wound up in the second winding box 3, and the filter element clamp 9 is wound up on the lower winding shaft 6 together with the filter element head 201. Step 302: The controller 20 sends a material shortage alarm signal to prompt the operator to replace the material; Step 303: The operator releases the filter element head 201 from the filter element clamp 9 at the second winding box 3 located at the lower position; Step 304: Remove the lower roll 6 from the second winding box 3. At this time, the lower roll 6 has the used old filter media roll on it. Step 305: Repeat steps 101 to 108 above to complete a new round of new material feeding operation.

[0059] For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this application, and these all fall within the scope of protection of this application.

Claims

1. A roller shutter type filter, characterized in that, include: The frame (1) has a filter media channel (11) that runs vertically through it. The first take-up box (2) is fixedly installed at the upper end of the frame (1), and an upper winding shaft (4) is rotatably installed inside it. The second take-up box (3) is fixedly installed at the lower end of the frame (1), and a detachable lower roll (6) is rotatably installed inside it. The first drive module (5) is used to drive the upper scroll (4) to rotate; The second drive module (7) is used to drive the lower roll (6) to rotate; A filter cartridge chuck (9) is used to hold the filter cartridge head (201) and is fixedly connected to the upper winding shaft (4) via a flexible belt (8); A first electromagnetic clutch (51) is disposed between the first drive module (5) and the upper reel (4), and is configured to disconnect the connection between the first drive module (5) and the upper reel (4) when the upper reel (4) is a driven shaft; A second electromagnetic clutch (71) is disposed between the second drive module (7) and the lower reel (6), and is configured to disconnect the connection between the second drive module (7) and the lower reel (6) when the lower reel (6) is a driven shaft.

2. The roller shutter filter according to claim 1, characterized in that, The first winding box (2) is also provided with a damping element (22). When the upper winding shaft (4) is unwound as a driven shaft, the damping element (22) abuts against the outer peripheral surface of the filter material roll wound on the upper winding shaft (4).

3. The roller shutter filter according to claim 1, characterized in that, The second winding box (3) is rotatably provided with a first drive wheel (31), which is connected to the output end of the second drive module (7). The first drive wheel (31) is fixedly provided with a first mounting tube seat (32) on the end face of the first drive wheel (31) facing the lower winding shaft (6). One end of the lower winding shaft (6) is detachably inserted into the first mounting tube seat (32) and is circumferentially fixed.

4. The roller shutter filter according to claim 3, characterized in that, The lower winding shaft (6) is rotatably provided with a shaft seat block (61) at one end away from the first mounting tube seat (32). The second winding box (3) is fixedly provided with a mounting support (33). The mounting support (33) is provided with an upward-facing mounting slot (331). The shaft seat block (61) is detachably placed in the mounting slot (331).

5. The roller shutter filter according to claim 3, characterized in that, The second winding box (3) is rotatably provided with a second mounting tube seat (34) on the other side relative to the first mounting tube seat (32), and the other end of the lower winding shaft (6) is detachably inserted into the second mounting tube seat (34) and is circumferentially fixed.

6. The roller shutter filter according to claim 1, characterized in that, It also includes a controller (20), an encoder (30) electrically connected to the controller (20), a differential pressure switch, and / or a timing module; the sensing end of the encoder (30) makes rolling contact with the surface of the filter material passing through the filter material channel (11); when the signal collected by one of the encoder (30), the differential pressure switch, or the timing module reaches the set trigger condition, the controller (20) controls the first drive module (5) and the second drive module (7) to start or stop, and at the same time controls the first clutch (51) and the second electromagnetic clutch (71) to engage or disengage accordingly.

7. The roller shutter filter according to claim 6, characterized in that, The set trigger conditions include: Condition 1: The encoder (30) detects that the filter material has moved to a set length; Condition 2: The pressure difference detected by the differential pressure switch reaches the set differential pressure value; Condition 3: The timing module reaches the set duration.

8. The roller shutter filter according to claim 1, characterized in that, The filter element clamp (9) includes a support crossbar (91) and a plurality of locking components (92) spaced apart along the length of the support crossbar (91); the locking components (92) include studs (921) fixed on the support crossbar (91), pressure plates (922) for pressing the surface of the filter material, and nuts (923) that cooperate with the studs (921); the free end of the flexible belt (8) is fixedly connected to the support crossbar (91).

9. The roller shutter filter according to claim 1, characterized in that, The filter element clamp (9) is fixed to the filter element head (201) by means of a strip or hook and loop fastener.

10. A method of using a roller shutter filter according to any one of claims 1 to 9, characterized in that, include: S1. Adding new materials: S11. Take the lower roll (6) out of the second winding box (3), pass it through the center hole of the new roll filter material (200), and then install the lower roll (6) together with the roll filter material (200) back into the second winding box (3). S12. The filter element clamp (9) clamps the filter element head (201) of the rolled filter material (200). S13. Control the first electromagnetic clutch (51) to engage and the second electromagnetic clutch (71) to disengage, start the first drive module (5) to drive the upper winding shaft (4) to rotate, and wind up the flexible belt (8). The filter element head (201) is pulled upward by the filter element chuck (9), so that the rolled filter material (200) is gradually unwound and gradually transferred from the second winding box (3) to the first winding box (2), and rewound onto the upper winding shaft (4). S14. When the rolled filter material (200) is unwound to the end, the filter element tail (202) is fixed on the lower winding shaft (6); S15. Continue unwinding until the roll filter material (200) is unwound completely. The first drive module (5) stops, and the new material feeding operation is completed. S2. Automatic material changing: S21. The equipment is operating normally, and the rolled filter media (200) filters the air; S22. When the material replacement trigger condition is met, control the second electromagnetic clutch (71) to engage and the first electromagnetic clutch (51) to disengage, start the second drive module (7) to drive the lower winding shaft (6) to rotate, and rewind the used filter material. At the same time, the filter material pulls the upper winding shaft (4) to unwind, so that the new filter material is released into the filtration functional area (10). S23. During the material replacement process, the moving length of the filter material is monitored in real time. When the moving length reaches the preset single material replacement length, the second drive module (7) stops and the filter material is updated once. S24. Repeat steps S22 to S23 until all the rolled filter media (200) is used up. S3. Unloading of old materials and replacement of new materials: S31. When all the rolled filter material (200) is used up, the filter element clamp (9) is wound up onto the lower roller (6) along with the filter element head (201), and a material shortage alarm signal is issued. S32. At the second winding box (3) located at the lower position, loosen the connection between the filter element head (201) and the filter element clamp (9), take the lower winding shaft (6) out of the second winding box (3), and remove the lower winding shaft (6) with the old filter material roll. S33. Repeat steps S11 to S15 to complete a new round of new material feeding operation.

11. The method of use according to claim 10, characterized in that, The material change triggering condition in step S22 is any one or a combination of the following: The pressure difference between the air inlet side and the air outlet side of the filter material detected by the differential pressure switch (30) reaches a preset threshold. The cumulative usage time of the filter media, as recorded by the timing module, reaches a preset threshold.

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