A filter device and method for a breathing apparatus

Abstract

The application provides a filter device and method for a breathing machine, and belongs to the technical field of medical instruments. The device comprises a breathing machine body, an air inlet pipe fixedly connected through a side wall at one end of the breathing machine body, a filter part provided on the air inlet pipe, and a circular groove plate box included in the filter part. By manually pressing a pressing cylinder on the circular groove plate box, a plurality of sliding blocks are driven to slide down in a plurality of sliding grooves provided in a rotating cylinder, thereby entering a slope groove connected to the bottom end of the sliding groove, and further driving the rotating cylinder to rotate. The rotating cylinder simultaneously drives a partition plate, filter cotton sheets and a mesh plate to rotate, thereby moving the position of the filter cotton sheets. The application can simultaneously realize the functions of rotating replacement and in-situ cleaning and dust removal of the filter cotton sheets through a single pressing operation of the user, which helps to continuously maintain the low air resistance and stable working performance of the filter device, thereby effectively prolonging the actual service life of the filter consumables and ensuring the effect and safety of the breathing treatment.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a filtration device and method for a ventilator. Background Technology

[0002] As an important medical assistive device, a ventilator delivers pressurized oxygen or a gas mixture to the patient's lungs, mimicking the natural breathing process to promote gas exchange and maintain vital signs. It is widely used to assist or replace patient breathing, especially in home settings, providing the possibility of long-term care for patients with chronic respiratory diseases. To ensure the cleanliness of the inhaled air, home ventilators generally have filter pads at the air inlet to remove air pollutants. However, these filter pads are consumables and need to be replaced regularly. In actual use, even when replaced according to the recommended schedule, dust gradually accumulates on the surface of the filter pads, leading to increased ventilation resistance. This can cause problems such as unstable airflow output and increased noise from the ventilator, and may even lead to bacterial growth due to the accumulation of pollutants, affecting treatment effectiveness and patient health.

[0003] A patent document with publication number CN119303203A discloses a filtration device for a ventilator, comprising a circular housing with a fan-shaped groove on its side. A rotating block is rotatably connected inside the circular housing, and two placement holes are formed along the circumference of the rotating block. Each placement hole contains an annular filter element. An air inlet pipe is fixedly connected to the top of the circular housing, and an exhaust pipe is fixedly connected to the side of the circular housing away from the fan-shaped groove. This patent document uses a filter conversion mechanism to disconnect the air inlet and exhaust pipes from the housing and reconnect them to the replaced annular filter element for filtration. This allows the ventilator to replace the filter element while it is in operation, ensuring normal filtration during the replacement process and reducing the impact of filter replacement on the ventilator's operation.

[0004] While the aforementioned patent documents avoid the problem of treatment interruption caused by filter replacement to some extent, their essence is still "replacement" maintenance using spare filters. They also do not address the immediate treatment of dust adhering to the surface of the filter after use. In other words, the existing technology lacks a ventilator filtration device that allows users to easily rotate or move the currently used filter pad, which has accumulated dust and increased ventilation resistance, out of the main airflow channel and activate a cleaning device to clean its surface. The scraped dust is then effectively collected by a simultaneously activated suction device, thereby restoring the permeability of the filter pad in a timely manner, rather than having to wait until the machine is shut down to perform the above treatment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a ventilator filtration device and method, effectively solving the problem of the lack of a ventilator filtration device in the prior art. This allows users to easily rotate or move a filter pad that is currently in use but has accumulated dust on its surface, causing increased ventilation resistance, out of the main airflow channel through simple and convenient operation. A cleaning device is then activated to clean its surface, and the scraped dust is effectively collected by a simultaneously activated suction device, thereby restoring the permeability of the filter pad in a timely manner, rather than having to wait until the machine is stopped to perform the above treatment.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a filtration device for a ventilator, comprising a ventilator body, an air inlet pipe fixedly connected to one end side wall of the ventilator body, a filter section provided on the air inlet pipe, the filter section including a circular groove plate box, one end plate of the circular groove plate box being fixedly connected to the other end pipe of the air inlet pipe, a bottom plate being tightly fitted to the bottom outer wall of the circular groove plate box, a plurality of T-shaped locking blocks being fixedly connected to the top outer wall of the bottom plate, and a T-shaped locking groove being intermittently and tightly engaged with each of the T-shaped locking blocks being opened in a circular pattern in the bottom inner wall of the circular groove plate box, an oblique air inlet groove being opened through the top side wall of the circular groove plate box, and a pressing cylinder being slidably connected through the center of the top of the circular groove plate box, an elastic rotating structure being provided between the pressing cylinder and the inner wall of the circular groove plate box, and a pressing and suction structure being provided between the pressing cylinder and the outer wall of the circular groove plate box.

[0007] Preferably, the elastic rotating structure includes a spring fixedly connected to the top of the pressing cylinder, the bottom end of the spring being fixedly connected to the outer wall of the top of the base plate, a plurality of sliders being fixedly connected around the outer wall of the pressing cylinder near the bottom end, and a rotating cylinder being slidably connected to the pressing cylinder.

[0008] Preferably, the bottom end of the rotating cylinder and the top outer wall of the base plate are fitted and rotated together. The inner wall of the top of the rotating cylinder is provided with a groove that can be fitted and slidably connected with each slider. The top and bottom positions of every two adjacent grooves are connected by a circumferential groove opened in the inner wall of the rotating cylinder. Each slider can be fitted and slidably connected with the inner wall of the sloping groove intermittently. A lever groove is provided in the inner wall of the top end of each groove. A lever plate is hinged in the inner wall of each lever groove. A baffle is fixedly connected in the inner wall of one end of each lever groove. Each lever plate is fitted and connected intermittently with the inner wall of each lever groove and the outer wall of one end of the baffle. Each slider and each lever plate are fitted and slidably connected intermittently. When the lever plate is squeezed and flipped into the lever groove when the slider moves upward, it is blocked by the baffle and tilts towards the slider.

[0009] Preferably, multiple partitions are fixedly connected to the outer wall of the rotating cylinder in a ring-like manner. A filter cotton sheet is provided between each two adjacent partitions. A mesh plate for placing activated carbon is fixedly connected to the inner wall of each filter cotton sheet. The outer walls of each two adjacent partitions and filter cotton sheets are adhesively connected by Velcro. The outer wall of each filter cotton sheet is intermittently fitted and slidably connected to the inner wall of the circular groove plate box.

[0010] Preferably, the pressing and suction structure includes a sleeve rod movably sleeved on the outer wall of the pressing cylinder. A rocker plate is intermittently attached to one end of the sleeve rod. The bottom end of the rocker plate is fixedly connected to the top outer wall of the circular groove plate box. An L-shaped top plate is provided above the top plate on the side of the rocker plate away from the sleeve rod. An elastic member is fixedly connected between the inner wall of the L-shaped top plate and the top outer wall of the rocker plate. A ball rod is movably sleeved inside one bottom end plate of the rocker plate. A T-arc scraper is fixedly connected to the bottom end of the ball rod. The T-arc scraper can intermittently slide and adhere to the inner wall of each filter cotton sheet. A perforated groove plate is fixedly connected to the smooth outer wall of one end of the T-arc scraper. A groove is formed through the circular groove plate box to slide and adhere to the T-arc scraper and the perforated groove plate.

[0011] Preferably, two folded flexible plates are fixedly connected to the inner wall of the top end of the slotted plate, and the outer walls of both ends of the two folded flexible plates can be slidably connected to the inner wall of the slotted plate. Furthermore, two rectangular grooves are formed through the outer walls of both ends of the slotted plate.

[0012] Preferably, two ear plates are fixedly connected to the bottom ends of the two folded flexible plates one, and the bottom outer walls of the two sets of ear plates are fixedly connected to the top outer wall of the circular groove plate box. The two sets of ear plates are slidably connected to the inner walls of the two sets of rectangular grooves, and a folded flexible plate two is fixedly connected between the top outer walls of the two sets of ear plates and the top inner walls of the two sets of rectangular grooves. The two outer walls of each folded flexible plate two are slidably connected to the inner walls of each rectangular groove.

[0013] Preferably, a sliding plate is fixedly connected to the shaft of the cue stick, and a support plate is slidably connected to one end of the outer wall of the sliding plate. The plate body of the support plate is fixedly connected to the outer wall of the circular groove plate box. A corrugated pipe is fixedly connected between the top outer wall of the sliding plate and the bottom outer wall of the support plate. A drawing pipe is fixedly connected through the plate body of the sliding plate and the plate body of the perforated groove plate. A conveying pipe is fixedly connected through the plate body of the support plate. A one-way valve is fixedly connected to the pipe body of both the drawing pipe and the conveying pipe.

[0014] Preferably, a dust collection box is fixedly connected through the other end of the pipe, the bottom outer wall of the dust collection box is fixedly connected to the plate of the support plate, and a drawer is slidably connected to the inner wall of one end of the dust collection box.

[0015] The present invention also provides a filtration method using a ventilator filter, the filtration method comprising the following steps:

[0016] S1, by manually pressing the pressing cylinder on the circular groove plate box, the pressure is applied downward and the spring is squeezed. The downward pressing cylinder will also drive multiple sliders to slide down in multiple grooves opened in the rotating cylinder, thereby pressing against the hinge plate in the lever plate groove and applying pressure. When each slider continuously and passively presses down on the hinge plate, the rotating cylinder will be subjected to a certain degree of rotation. Then, after the rotating cylinder is passively rotated, the slider can disengage from the hinge plate and enter the inclined groove.

[0017] S2, the slider slides down the inclined groove to the bottom. During this process, the rotating drum will drive the baffle, filter cotton and mesh plate to rotate at the same time, thereby aligning the clean filter cotton with the air intake pipe.

[0018] S3. Next, rotate the sleeve connected to the pressing cylinder to adjust its angle, aligning it with one side of the rocker plate. Then, release the pressing cylinder, and the spring will cause it to reset and move upward. As the sleeve moves upward, it will push the rocker plate upward, causing it to tilt in the opposite direction. At the same time, it will stretch the elastic component installed on the L-shaped top plate, causing it to deform. The tilted rocker plate will then move the T-shaped scraper and the perforated plate downward between the adjacent partitions, contacting the inner wall of the filter cotton sheet to scrape and clean the dust on its inner wall. It will also simultaneously move the moving plate downward and stretch the support plate. The corrugated pipe installed on the top will generate a suction force inside the stretched corrugated pipe. This suction force will then be generated on the inner wall of the perforated plate through the suction pipe, thereby absorbing and collecting dust from the filter cotton sheets in the two partitions after use. Simultaneously, the upward-moving slider will slide against the hinge plate and push it into the hinge plate groove. When the spring force automatically extends to its maximum value and stops moving upward, the slider moves upward past the hinge plate, while each slider is still in its corresponding groove. The hinge plate, no longer under pressure, will automatically detach from the hinge plate groove due to its own gravity due to the presence of the baffle.

[0019] S4. After the filter cotton sheet has been used for one rotation, the T-shaped locking block on the bottom plate and the T-shaped locking slot in the circular groove plate box are separated, thereby stretching the spring. The rotating drum can then be pulled down and moved out of the circular groove plate box. Then, with the help of support tools, a gap can be created between the circular groove plate box and the bottom plate to replace the filter cotton sheet as a whole.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The present invention provides a ventilator filter device that can simultaneously realize the two functions of rotating and replacing the filter cotton pad and cleaning and dust removal in place through a single press operation by the user. This not only completely changes the traditional maintenance mode of requiring manual replacement of filter cotton pads when the machine is stopped or only being able to be replaced but not cleaned, but also greatly improves the user's ease of operation, reduces the maintenance burden and reduces the potential risk of treatment interruption. Moreover, by actively and instantly maintaining the cleanliness of the surface of the filter cotton pad, it helps to continuously maintain the low ventilation resistance and stable working performance of the filter device, thereby effectively extending the actual service life of the filter consumables and ensuring the effectiveness and safety of respiratory therapy.

[0022] (2) The present invention provides a ventilator filter device that not only realizes the convenient replacement of filter pads, but also integrates complex mechanical actions into a simple pressing operation. Specifically, the user presses the pressing cylinder on the circular groove plate box, which causes it to move downward and squeeze the spring at the same time. The downward pressing cylinder will also drive multiple sliders to slide down in multiple grooves opened in the rotating cylinder, thereby entering the inclined groove connected to the bottom of the groove. By moving downward, the slider slides according to the path of the inclined groove. The sliding of the slider in the inclined groove will drive the rotating cylinder to rotate. The rotating cylinder will drive the partition, filter pads and mesh plate to rotate at the same time, thereby switching the position of the filter pads.

[0023] (3) The ventilator filter device provided by the present invention can effectively clean the surface of the filter cotton pad while replacing it, and also realize the automatic collection of dust that falls off during the cleaning process, thus avoiding dust dispersion. Specifically, during the passive downward movement of the pressing cylinder, the connected T-shaped scraper and the perforated plate will be indirectly moved down into the partition, thereby contacting the inner wall of the filter cotton pad. The surface of the filter cotton pad will be scraped by the T-shaped scraper to clean the dust on the surface. At the same time, the moving plate will be moved down to stretch the corrugated tube installed on the support plate. The stretched corrugated tube will generate suction force inside, which will generate suction force on the inner wall of the perforated plate through the suction tube, thereby absorbing and collecting dust from the filter cotton pads in the two partitions after replacement. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall partial cross-sectional structure of the filter section of the present invention;

[0026] Figure 3 For the present invention Figure 2 A magnified view of the structure at point A in the middle;

[0027] Figure 4 This is a partial cross-sectional view of the filter section of the present invention.

[0028] Figure 5 This is a schematic diagram of a partially disassembled filter section of the present invention;

[0029] Figure 6 This is a partial cross-sectional view of the slotted plate of the present invention.

[0030] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at point B in the middle;

[0031] Figure 8 For the present invention Figure 6 A magnified schematic diagram of the structure at point C in the middle;

[0032] Figure 9 This is a partial planar structural diagram of the chute and inclined groove of the present invention;

[0033] Figure 10 This is a schematic diagram of the overall structure of the rocker arm of the present invention;

[0034] Figure 11 This is a schematic diagram of the overall structure of the T-shaped scraper of the present invention.

[0035] In the diagram: 100, Ventilator body; 101, Inlet pipe; 200, Filter section; 201, Circular groove plate box; 202, Base plate; 203, T-shaped locking block; 204, T-shaped locking slot; 205, Compression cylinder; 206, Spring; 207, Slider; 208, Rotating cylinder; 209, Slide groove; 2091, Paddle plate groove; 2092, Hinge plate; 210, Inclined groove; 211, Partition plate; 212, Filter cotton sheet; 213, Mesh plate 214. Sleeve rod; 2141. Rocker; 2142. L-shaped top plate; 2143. Elastic component; 2144. Cue stick; 215. T-shaped scraper; 216. Groove plate; 217. Folding flexible plate one; 218. Ear plate; 219. Folding flexible plate two; 220. Moving plate; 221. Support plate; 222. Corrugated pipe; 223. Pull-out pipe; 224. Delivery pipe; 225. One-way valve; 226. Dust collection box; 227. Drawer. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", and "outer" indicate orientation or positional relationships only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0038] It should be understood that, in the description of the invention, it should be noted that, unless otherwise explicitly specified and limited, the terms “installation,” “connection,” and “linking” should be interpreted broadly.

[0039] Example 1: See Appendix Figures 1 to 11 This invention provides a filtration device for a ventilator, including a ventilator body 100. An air inlet pipe 101 is fixedly connected to one end side wall of the ventilator body 100. A filter section 200 is provided on the air inlet pipe 101, which includes a circular grooved plate box 201. One end plate of the circular grooved plate box 201 is fixedly connected to the other end of the air inlet pipe 101. A bottom plate 202 is tightly fitted to the bottom outer wall of the circular grooved plate box 201. Multiple T-shaped locking blocks 203 are fixedly connected in a circumferential manner to the top outer wall of the bottom plate 202. Each T-shaped... All the locking blocks 203 are made of natural rubber. The bottom inner wall of the circular groove plate box 201 is also provided with T-shaped slots 204 that can intermittently and tightly engage with each T-shaped locking block 203. The top side wall of the circular groove plate box 201 is provided with an oblique air inlet slot. A pressing cylinder 205 is slidably connected to the top center of the circular groove plate box 201. An elastic rotating structure is provided between the pressing cylinder 205 and the inner wall of the circular groove plate box 201. A pressing and suction structure is provided between the pressing cylinder 205 and the outer wall of the circular groove plate box 201.

[0040] It should be noted that when the ventilator is activated, air is drawn in through the inlet tube 101 and the inclined air inlet slot on the circular slotted plate box 201. The drawn-in air is automatically filtered by the filter cotton pad 212 and the mesh plate 213 containing activated carbon. The addition of activated carbon can further purify and filter the air. When the manual press is applied to the press cylinder 205 on the circular slotted plate box 201, it moves downward and squeezes the spring 206, causing the spring 206 to deform. The presence of the spring 206 facilitates the subsequent movement of the press cylinder 205. The automatic upward reset also simultaneously drives multiple sliders 207 to slide down in multiple grooves 209 opened in the rotating drum 208, thereby entering the inclined groove 210 connected to the bottom of the groove 209. By moving downward, the sliders 207 slide according to the path of the inclined groove 210. The sliding of the sliders 207 in the inclined groove 210 will drive the rotating drum 208 to rotate. The rotating drum 208 will simultaneously drive the partition 211, filter cotton sheet 212 and mesh plate 213 to rotate, thereby replacing the filter cotton sheet 212.

[0041] The elastic rotating structure includes a spring 206 fixedly connected to the inner wall of the top end of the pressing cylinder 205. The bottom end of the spring 206 is fixedly connected to the outer wall of the top end of the base plate 202. Multiple sliders 207 are fixedly connected around the outer wall of the pressing cylinder 205 near the bottom end. A rotating cylinder 208 is slidably connected to the pressing cylinder 205. The bottom end of the rotating cylinder 208 is rotatably connected to the outer wall of the top end of the base plate 202. A groove 209 is provided in the inner wall of the top end of the rotating cylinder 208, which can be slidably connected to each slider 207. The top and bottom positions of every two adjacent grooves 209 are connected by a sloping groove 210 opened in the inner wall of the rotating cylinder 208. Each slider 207 can intermittently be slidably connected to the inner wall of the sloping groove 210.

[0042] Each slide groove 209 has a lever groove 2091 on its inner wall near the top. A hinged lever plate 2092 is hinged to the inner wall of each lever groove 2091. A baffle is fixedly connected to the inner wall of one end of each lever groove 2091. Each hinged lever plate 2092 is intermittently fitted to the inner wall of each lever groove 2091 and the outer wall of one end of the baffle. Each slider 207 and each hinged lever plate 2092 are intermittently fitted and slidably connected. The hinged lever plate 2092 is flipped and enters the lever groove 2092 when squeezed by the slider 207 moving upwards. After 091, it is blocked by the baffle and tilts towards the slider 207. Multiple partitions 211 are fixedly connected around the outer wall of the rotating cylinder 208. A filter cotton sheet 212 is provided between each two adjacent partitions 211. A mesh plate 213 for placing activated carbon is fixedly connected to the inner wall of each filter cotton sheet 212. The outer walls of each two adjacent partitions 211 and the two ends of the filter cotton sheet 212 are adhesively connected by Velcro. The outer wall of each filter cotton sheet 212 is intermittently attached and slidably connected to the inner wall of the circular groove plate box 201.

[0043] It is easy to understand that when replacing the filter cotton sheet 212, one only needs to manually press the pressing cylinder 205 on the circular groove plate box 201, causing it to move downwards and simultaneously compress the spring 206, causing the spring 206 to deform. The presence of the spring 206 facilitates the subsequent automatic upward repositioning of the pressing cylinder 205. The downward movement of the pressing cylinder 205 also simultaneously drives multiple sliders 207 to slide down within the multiple grooves 209 opened in the rotating cylinder 208, thereby pressing against the hinge plate 2092 in the lever groove 2091 and applying pressure to it. When each slider 207 is continuously pressed together... Pressing down the hinge plate 2092 will cause the rotating drum 208 to rotate to a certain extent. Then, after the rotating drum 208 is passively rotated, the slider 207 can disengage from the hinge plate 2092 and enter the inclined groove 210, thereby driving the rotating drum 208 to rotate continuously. The rotating drum 208 will simultaneously drive the partition 211, filter cotton pad 212 and mesh plate 213 to rotate, thereby moving the unused filter cotton pad 212 to the air inlet pipe 101. The filter cotton pad 212 can be replaced multiple times independently, and the ventilator body 100 does not need to be turned off during the replacement.

[0044] The pressing and suction structure includes a sleeve rod 214 that is movably sleeved on the outer wall of the pressing cylinder 205. A rocker plate 2141 is intermittently attached to one end plate of the sleeve rod 214. The bottom plate of the rocker plate 2141 is fixedly connected to the top outer wall of the circular groove plate box 201. An L-shaped top plate 2142 is provided above the top plate of the rocker plate 2141 on the side away from the sleeve rod 214. An elastic element 2143 is fixedly connected between the inner wall of the L-shaped top plate 2142 and the top outer wall of the rocker plate 2141. A ball rod 2144 is movably sleeved in the bottom plate of one side of the rocker plate 2141.

[0045] A T-shaped scraper 215 is fixedly connected to the bottom end of the rod 2144. The T-shaped scraper 215 can intermittently slide and adhere to the inner wall of each filter cotton sheet 212. A perforated plate 216 is fixedly connected to the outer wall of the smooth plate at one end of the T-shaped scraper 215. A groove is opened through the circular groove plate box 201 to slide and adhere to the T-shaped scraper 215 and the perforated plate 216.

[0046] Two folded flexible plates 217 are fixedly connected to the inner wall of the top of the slotted plate 216. The outer walls of both ends of the two folded flexible plates 217 can be slidably connected to the inner wall of the slotted plate 216. Two rectangular grooves are opened through the outer walls of both ends of the slotted plate 216. Two ear plates 218 are fixedly connected to the bottom of the two folded flexible plates 217. The outer walls of the bottom ends of the two sets of ear plates 218 are fixedly connected to the outer wall of the top of the circular slotted plate box 201. The two sets of ear plates 218 are slidably connected to the inner walls of the two sets of rectangular grooves. A folded flexible plate 219 is fixedly connected between the outer walls of the top of the two sets of ear plates 218 and the inner walls of the top of the two sets of rectangular grooves. The outer walls of both ends of each folded flexible plate 219 are slidably connected to the inner wall of each rectangular groove.

[0047] It should be noted that before the manual pressure on the pressing cylinder 205 is stopped, allowing it to be reset and moved upward by the spring 206, the angle of the sleeve rod 214 connected to the pressing cylinder 205 needs to be adjusted by rotation so that it aligns with one side of the rocker plate 2141. When the sleeve rod 214 is moved upward, it will push the rocker plate 2141 upward, causing the plate to tilt in the opposite direction. At the same time, it stretches the elastic element 2143 installed on the L-shaped top plate 2142, causing it to deform. As a result, the tilted rocker plate 2141 will simultaneously drive the T-shaped scraper 215 and the perforated plate 216 to move downward between the adjacent partitions 211 and contact the inner wall of the filter cotton sheet 212 to scrape and clean the dust on its inner wall.

[0048] During the downward movement, the perforated plate 216 will be pressed against the folded soft plate 217 and folded soft plate 219 connected inside by the ear plate 218 fixed on the circular slotted plate box 201, causing both to fold simultaneously. The surfaces of folded soft plate 217 and folded soft plate 219 are coated with nano-coatings, making it difficult for dust to adhere. As the perforated plate 216 gradually moves downward, it will remove the obstruction to the plate body, making it easier to suck dust through the perforated plate 216 in the future. This will prevent the air outside the circular slotted plate box 201 from being sucked up, and focus only on the dust absorption of the filter cotton sheet 212 inside the circular slotted plate box 201.

[0049] A sliding plate 220 is fixedly connected to the shaft of the cue stick 2144. A support plate 221 is slidably connected to the outer wall of one end of the sliding plate 220. The plate body of the support plate 221 is fixedly connected to the outer wall of the circular groove plate box 201. A corrugated pipe 222 is fixedly connected between the top outer wall of the sliding plate 220 and the bottom outer wall of the support plate 221. A drawer 223 is fixedly connected through the plate body of the sliding plate 220 and the plate body of the perforated plate 216. A conveying pipe 224 is fixedly connected through the plate body of the support plate 221. A one-way valve 225 is fixedly connected to the pipe body of both the drawer 223 and the conveying pipe 224. A dust collection box 226 is fixedly connected through the other end of the conveying pipe 224. The bottom outer wall of the dust collection box 226 is fixedly connected to the plate body of the support plate 221. A drawer 227 is slidably connected to the inner wall of one end of the dust collection box 226.

[0050] It is easy to understand that during the passive downward movement of the cue stick 2144, the moving plate 220 will also move downward simultaneously, stretching the corrugated pipe 222 installed on the support plate 221. The stretched corrugated pipe 222 will generate suction force inside, which will then generate suction force on the inner wall of the perforated plate 216 through the suction pipe 223, thereby absorbing and collecting dust from the filter cotton sheets 212 in the two replaced partitions. When the sleeve rod 214 is passively reset and moved upward, it will squeeze the corrugated pipe 222 to generate squeezing force inside, thereby squeezing out the previously sucked-in dust through the delivery pipe 224 and inputting it into the connected dust collection box 226, where it falls into the drawer 227. Afterward, the dust can be cleaned simply by pulling out the drawer 227. The one-way valves 225 installed on the suction pipe 223 and the delivery pipe 224 can only enable the two to have a one-way effect of only inflow and only outflow respectively.

[0051] One point to add is that the squeeze suction structure is to prevent dust on the filter cotton sheet 212 from falling into the circular groove plate box 201 due to vibration caused by separation when replacing the filter cotton sheet 212. Therefore, it is cleaned in advance. After the filter cotton sheet 212 has rotated once, the T-shaped locking block 203 on the bottom plate 202 and the T-shaped locking slot 204 in the circular groove plate box 201 are separated, thereby stretching the spring 206. This allows the rotating drum 208 to be pulled down and moved directly out of the circular groove plate box 201. Then, it can be moved out with the help of a support. The support tool creates a gap between the circular groove plate box 201 and the base plate 202, which facilitates the overall replacement of the filter cotton pad 212. Since the surface of the filter cotton pad 212 has been cleaned beforehand, the entire replacement process will not generate dust or bacteria that will be dispersed into the air. This greatly extends the filtration life of the filter cotton pad 212 for the ventilator body 100, eliminating the need to replace it every three months. However, even if it is not used, all filter cotton pads 212 need to be replaced approximately every two years to prevent bacterial growth.

[0052] It should be noted that when the ventilator body 100 is activated, air is drawn in through the air inlet pipe 101 and the inclined air inlet slot on the circular slot plate box 201. The drawn-in air is automatically filtered by the filter cotton pad 212 and the mesh plate 213 containing activated carbon. The addition of activated carbon can achieve more comprehensive purification and filtration of the air. Each T-shaped card block 203 is made of natural rubber.

[0053] The present invention also provides a filtration method using a ventilator filter, the filtration method comprising the following steps:

[0054] S1, by manually pressing the pressing cylinder 205 on the circular groove plate box 201, it is forced to move downward and squeeze the spring 206. The downward pressing cylinder 205 will also drive multiple sliders 207 to slide down in multiple grooves 209 opened in the rotating cylinder 208, thereby pressing against the hinge plate 2092 in the lever groove 2091 and applying pressure to it. When each slider 207 continuously and passively presses down on the hinge plate 2092 together, the rotating cylinder 208 will be subjected to force and rotate to a certain extent. Then, after the rotating cylinder 208 is passively rotated, the slider 207 can disengage from the hinge plate 2092 and enter the inclined groove 210, thereby driving the rotating cylinder 208 to rotate continuously.

[0055] S2, the slider 207 slides downward along the path of the inclined groove 210 to the bottom. During this process, the rotating drum 208 will simultaneously drive the partition 211, the filter cotton sheet 212 and the mesh plate 213 to rotate, thereby aligning the clean filter cotton sheet 212 with the air inlet pipe 101.

[0056] S3, then first rotate the sleeve 214 connected to the pressing cylinder 205 to adjust its angle so that it aligns with one side of the rocker plate 2141. Then release the pressing cylinder 205, and the spring 206 drives it to reset and move upward. As the sleeve 214 is moved upward, it will push the rocker plate 2141 upward, causing it to tilt in the opposite direction. At the same time, it stretches the elastic element 2143 installed on the L-shaped top plate 2142, causing it to deform. As a result, the tilted rocker plate 2141 will simultaneously drive the T-shaped scraper 215 and the perforated plate 216 to move down between the adjacent partitions 211 and contact the inner wall of the filter cotton sheet 212 to scrape and clean the dust on its inner wall. It will also simultaneously drive the moving plate 220 to move down and stretch the support plate 221. The bellows 222 installed on the top will have a suction force inside when stretched and extended. This suction force will then be generated on the inner wall of the perforated plate 216 through the suction pipe 223, thereby absorbing and collecting dust from the filter cotton sheets 212 in the two partitions 211 after replacement. Simultaneously, the upward-moving slider 207 will slide against the hinge plate 2092 and push it into the plate groove 2091. When the spring 206 automatically extends to its maximum elastic force and stops moving upward, the slider 207 moves upward past the hinge plate 2092, while each slider 207 is still in the corresponding groove 209. The hinge plate 2092, no longer under pressure, will automatically detach from the plate groove 2091 due to its own gravity because of the presence of the baffle.

[0057] S4, after the filter pad 212 has been used in one rotation, the T-shaped locking block 203 on the base plate 202 and the T-shaped locking slot 204 in the circular slot box 201 are separated, thereby stretching the spring 206, and then the rotating cylinder 208 can be pulled down and moved directly out of the circular slot box 201. Then, a gap can be created between the circular slot box 201 and the base plate 202 with the help of a support tool, which makes it easy to replace the filter pad 212 as a whole. Since the surface of the filter pad 212 has been cleaned beforehand, the entire replacement process will not generate dust or bacteria that are dispersed into the air, thus greatly extending the filtration time of the filter pad 212 for the ventilator body 100.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A filtration device for a ventilator, comprising a ventilator body (100), characterized in that: An air inlet pipe (101) is fixedly connected to one end of the side wall of the ventilator body (100). A filter section (200) is provided on the air inlet pipe (101), which includes a circular groove plate box (201). One end of the circular groove plate box (201) and the other end of the air inlet pipe (101) are fixedly connected. A base plate (202) is tightly fitted to the outer wall of the bottom end of the circular groove plate box (201). Multiple T-shaped locking blocks (203) are fixedly connected to the outer wall of the top end of the base plate (202) in a circumferential manner. The bottom inner wall of the plate box (201) is also provided with a T-shaped slot (204) that can intermittently and tightly engage with each of the T-shaped blocks (203). The top side wall of the circular groove plate box (201) is provided with an oblique air inlet slot. A pressing cylinder (205) is slidably connected to the top center of the circular groove plate box (201). An elastic rotating structure is provided between the pressing cylinder (205) and the inner wall of the circular groove plate box (201). A pressing and suction structure is provided between the pressing cylinder (205) and the outer wall of the circular groove plate box (201). The elastic rotating structure includes a spring (206) fixedly connected to the top of the pressing cylinder (205). The bottom end of the spring (206) is fixedly connected to the outer wall of the top of the base plate (202). Multiple sliders (207) are fixedly connected around the outer wall of the pressing cylinder (205) near the bottom end. A rotating cylinder (208) is slidably connected to the pressing cylinder (205). Multiple partitions (211) are fixedly connected around the outer wall of the rotating drum (208). A filter cotton sheet (212) is provided between each two adjacent partitions (211). A mesh plate (213) for placing activated carbon is fixedly connected to the inner wall of each filter cotton sheet (212). The outer walls of each two adjacent partitions (211) and filter cotton sheet (212) are connected by Velcro. The outer wall of each filter cotton sheet (212) is intermittently attached and slidably connected to the inner wall of the circular groove plate box (201). The pressing and suction structure includes a sleeve rod (214) that is movably sleeved on the outer wall of the pressing cylinder (205). A rocker plate (2141) can be intermittently attached to one end plate of the sleeve rod (2141). The bottom plate of the rocker plate (2141) is fixedly connected to the top outer wall of the circular groove plate box (201). An L-shaped top plate (2142) is provided above the top plate on the side of the rocker plate (2141) away from the sleeve rod (214). An elastic element (2143) is fixedly connected between the inner wall of the L-shaped top plate (2142) and the top outer wall of the rocker plate (2141). A ball rod (2144) is movably sleeved in the bottom plate on one side of the rocker plate (2141). A T-shaped scraper (215) is fixedly connected to the bottom end of the rod (2144). The T-shaped scraper (215) can intermittently slide and adhere to the inner wall of each filter cotton sheet (212). A perforated plate (216) is fixedly connected to the outer wall of the smooth plate at one end of the T-shaped scraper (215). A groove is provided through the circular groove plate box (201) to slide and adhere to the T-shaped scraper (215) and the perforated plate (216).

2. The filtration device for a ventilator according to claim 1, characterized in that: The bottom end of the rotating cylinder (208) and the top outer wall of the base plate (202) are fitted and rotated together. The inner wall of the top of the rotating cylinder (208) is provided with a groove (209) that can be fitted and slidably connected with each slider (207). The top and bottom positions of each pair of adjacent grooves (209) are connected by a circumferential groove (210) opened on the inner wall of the rotating cylinder (208). Each slider (207) can be fitted and slidably connected with the inner wall of the sloping groove (210) intermittently. Each of the slide grooves (209) has a lever groove (2091) in the inner wall near the top. Each lever groove (2091) has a hinged lever plate (2092) in the inner wall. Each lever groove (2091) has a baffle fixedly connected to one end of the inner wall. Each hinged lever plate (2092) and the inner wall of each lever groove (2091) and the outer wall of one end of the baffle are intermittently fitted and connected. Each slider (207) and each hinged lever plate (2092) are intermittently fitted and slidably connected. When the slider (207) moves upward, the hinged lever plate (2092) is squeezed and flipped into the lever groove (2091), and is blocked by the baffle and tilts towards the slider (207).

3. The filtration device for a ventilator according to claim 1, characterized in that: Two folded flexible plates (217) are fixedly connected to the inner wall of the top end of the slotted plate (216). The outer walls of both ends of the two folded flexible plates (217) can be slidably connected to the inner wall of the slotted plate (216). Two rectangular grooves are opened through the outer walls of both ends of the slotted plate (216).

4. The filtration device for a ventilator according to claim 3, characterized in that: Two ear plates (218) are fixedly connected to the bottom ends of the two folded soft plates (217). The bottom outer walls of the two sets of ear plates (218) are fixedly connected to the top outer wall of the circular groove plate box (201). The two sets of ear plates (218) are slidably connected to the inner walls of the two sets of rectangular grooves. A folded soft plate (219) is fixedly connected between the top outer walls of the two sets of ear plates (218) and the top inner walls of the two sets of rectangular grooves. The two outer walls of each folded soft plate (219) are slidably connected to the inner walls of each rectangular groove.

5. The filtration device for a ventilator according to claim 4, characterized in that: A sliding plate (220) is fixedly connected to the shaft of the cue stick (2144). A support plate (221) is slidably connected to the outer wall of one end of the sliding plate (220). The plate body of the support plate (221) is fixedly connected to the outer wall of the circular groove plate box (201). A corrugated pipe (222) is fixedly connected between the top outer wall of the sliding plate (220) and the bottom outer wall of the support plate (221). A drawing pipe (223) is fixedly connected between the plate body of the sliding plate (220) and the plate body of the perforated plate (216). A conveying pipe (224) is fixedly connected through the plate body of the support plate (221). A one-way valve (225) is fixedly connected to the pipe body of both the drawing pipe (223) and the conveying pipe (224).

6. The ventilator filter according to claim 5, characterized in that: A dust collection box (226) is fixedly connected to the other end of the pipe (224). The bottom outer wall of the dust collection box (226) is fixedly connected to the plate of the support plate (221). A drawer (227) is slidably connected to the inner wall of one end of the dust collection box (226).

7. The filtration method of the ventilator filtration device according to any one of claims 1-6, characterized in that: The filtering method includes the following steps: S1, by manually pressing the pressing cylinder (205) on the circular groove plate box (201), it is forced to move downward and squeeze the spring (206). The downward pressing cylinder (205) will also drive multiple sliders (207) to slide down in multiple grooves (209) opened in the rotating cylinder (208), thereby pressing against the hinge plate (2092) in the lever groove (2091) and applying pressure to it. When each slider (207) continuously and passively presses down the hinge plate (2092) together, the rotating cylinder (208) will be forced to rotate to a certain extent. Then, after the rotating cylinder (208) is passively rotated, the slider (207) can disengage from the hinge plate (2092) and enter the inclined groove (210). S2, the slider (207) slides down the path of the inclined groove (210) to the bottom. During this process, the rotating drum (208) will simultaneously drive the partition (211), the filter cotton sheet (212) and the mesh plate (213) to rotate, thereby aligning the clean filter cotton sheet (212) with the air inlet pipe (101). S3, then first rotate the sleeve (214) connected to the pressing cylinder (205) to adjust its angle so that it aligns with one side of the rocker plate (2141). Then release the pressing cylinder (205), and the spring (206) drives it to reset and move upward. When the sleeve (214) is moved upward, it will push the rocker plate (2141) upward, causing the plate to tilt in the opposite direction. At the same time, it stretches the elastic element (2143) installed on the L-shaped top plate (2142), causing it to deform. As a result, the tilted rocker plate (2141) will simultaneously drive the T-shaped scraper (215) and the perforated plate (216) to move down between the adjacent partitions (211) and contact the inner wall of the filter cotton sheet (212) to scrape and clean the dust on its inner wall. It will also simultaneously drive the moving plate (220) to move down and stretch the support plate (221). The corrugated pipe (222) installed on the top will have a suction force inside the stretched corrugated pipe (222), which will then generate a suction force on the inner wall of the perforated plate (216) through the suction pipe (223), thereby collecting dust from the filter cotton sheets (212) in the two partitions (211) after replacement. At the same time, the upward sliding block (207) will slide past the hinge plate (2092) and push it into the plate groove (2091). When the spring (206) automatically extends to its maximum elastic force and stops moving upward, the sliding block (207) moves upward past the hinge plate (2092), and each sliding block (207) is still in the corresponding groove (209). The hinge plate (2092) that is no longer under pressure will automatically detach from the plate groove (2091) due to its own gravity because of the presence of the baffle. S4, after the filter cotton sheet (212) has been used for one rotation, the T-shaped locking block (203) on the base plate (202) and the T-shaped locking slot (204) in the circular groove plate box (201) are separated, thereby stretching the spring (206), and then the rotating drum (208) can be pulled down and moved out of the circular groove plate box (201). Then, the filter cotton sheet (212) can be replaced as a whole by using a support tool to create a gap between the circular groove plate box (201) and the base plate (202).

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