Filtering device and method for breathing machine

Abstract

The invention provides a filtering 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 is fixedly connected to the side wall of one end of the breathing machine body in a penetrating mode, a filtering part is arranged on the air inlet pipe, and a circular groove plate box is arranged in the filtering part; a pressing cylinder on a circular groove plate box is manually pressed to drive a plurality of sliding blocks to slide down in a plurality of sliding grooves formed in a rotating cylinder, so that the sliding blocks enter inclined surface grooves connected to the bottom ends of the sliding grooves, the rotating cylinder is further driven to rotate, the rotating cylinder drives a partition plate, a filtering cotton piece and a net plate to rotate at the same time, and therefore the position of the filtering cotton piece is moved. The two functions of rotary replacement and in-place cleaning and dust removal of the filtering cotton piece can be synchronously achieved through single pressing operation of a user, low ventilation resistance and stable working performance of the filtering device can be continuously kept, and therefore the actual service life of filtering consumables is effectively prolonged, and the effect and safety of respiratory treatment are guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a filtering device and method for a ventilator. Background Art

[0002] As an important medical auxiliary device, a ventilator delivers pressurized oxygen or a gas mixture to the lungs of a patient, simulating the natural breathing process to promote gas exchange and maintain vital signs. It is widely used to assist or replace the patient's breathing. Especially in the home scenario, it provides the possibility of long-term care for patients with chronic respiratory diseases. To ensure the cleanliness of the inhaled gas, home ventilators generally set filter cotton sheets at the air inlet to filter out air pollutants. However, these filter cotton sheets are consumables and need to be replaced regularly. In actual use, even if replaced according to the recommended cycle, dust will gradually adsorb and accumulate on the surface of the filter cotton sheet, resulting in an increase in ventilation resistance, which in turn causes problems such as unstable air flow output and increased noise of the ventilator. Even worse, bacteria may breed due to the accumulation of pollutants, affecting the treatment effect and the health of the patient.

[0003] After retrieval, the patent document with the publication number CN119303203A discloses a filtering device for a ventilator, which includes a circular housing. A fan-shaped groove is formed on the side surface of the circular housing. A rotating block is rotatably connected inside the circular housing. Two placement holes are circumferentially formed on the rotating block, and annular filter elements are arranged inside the placement holes. An air inlet pipe is fixedly communicated with the top of the circular housing, and an exhaust pipe is fixedly communicated with one side of the circular housing away from the fan-shaped groove. Through the action of the filtering conversion mechanism, the air inlet pipe and the exhaust pipe are disconnected from the placement housing, and the air inlet pipe and the exhaust pipe are re-connected to the replaced annular filter element for filtering, so that the filter element can be replaced when the ventilator is in a working state, and normal filtering can be ensured during the replacement process, reducing the impact on the operation of the ventilator caused by filter element replacement.

[0004] Although the above patent document avoids the problem of treatment interruption caused by filter element replacement to a certain extent, its essence is still "replacement-type" maintenance using a spare filter element, and it does not involve the immediate treatment of the dust attached to the surface of the used filter element. That is, in the prior art, there is a lack of a ventilator filtering device that allows users to simply and conveniently rotate or move out the filter cotton sheet that is currently in use but has accumulated dust on its surface and caused an increase in ventilation resistance from the main air flow channel, and start a cleaning device to clean its surface, and effectively collect the scraped dust through a synchronously started suction device, so as to timely restore the permeability of the filter cotton sheet, rather than having to wait until the machine stops to perform the above treatment. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a filtering device and method for a ventilator, effectively solving the problem that in the prior art, there is a lack of a ventilator filtering device that allows users to simply and conveniently operate to rotate or move out of the main air flow channel the filter cotton sheet that is currently in use but has accumulated dust on its surface, resulting in an increased ventilation resistance, and start a cleaning device to clean its surface, and effectively collect the scraped dust through a synchronously started suction device, so as to timely restore the permeability of the filter cotton sheet, rather than having to wait until the machine stops to perform the above-mentioned treatment.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A filtering device for a ventilator, including a ventilator body, a trachea is fixedly connected through the side wall at one end of the ventilator body, a filtering part is provided on the trachea, the filtering part includes a circular groove plate box, one end plate body of the circular groove plate box is fixedly connected through the other end tube body of the trachea, a bottom plate is closely attached to the outer wall at the bottom of the circular groove plate box, a plurality of T-shaped blocks are fixedly connected in a surrounding manner on the outer wall at the top of the bottom plate, and T-shaped grooves that can be intermittently and closely clamped with each T-shaped block are also provided in a surrounding manner in the inner wall at the bottom of the circular groove plate box. An inclined air inlet groove is provided through the side wall at the top of the circular groove plate box, and a pressing cylinder is slidably connected through the center position at the top of the circular groove plate box. An elastic rotation structure is jointly provided between the pressing cylinder and the inner wall of the circular groove plate box, and a pressing suction structure is jointly provided between the pressing cylinder and the outer wall of the circular groove plate box.

[0007] Preferably, the elastic rotation structure includes a spring fixedly connected to the inside of the top end of the pressing cylinder, the bottom end of the spring is fixedly connected to the outer wall at the top of the bottom plate, a plurality of sliders are fixedly connected in a surrounding manner on the outer wall of the pressing cylinder near the bottom end, and a rotating cylinder is slidably attached to the pressing cylinder.

[0008] Preferably, the bottom end of the rotating cylinder is rotatably attached to the outer wall at the top of the bottom plate, sliding grooves that can be slidably attached to each slider are provided in the inner wall at the top end of the rotating cylinder, inclined grooves are jointly provided in a surrounding manner at the top and bottom positions between every two adjacent sliding grooves and are provided in the inner wall of the rotating cylinder, and each slider can be intermittently slidably attached to the inner wall of the inclined groove; a dial plate groove is provided in the inner wall near the top end of each sliding groove, a hinge dial plate is hinged in the inner wall of each dial plate groove, a baffle is fixedly connected to the inner wall at one end of each dial plate groove, each hinge dial plate is intermittently attached to the inner wall of each dial plate groove and the outer wall at one end of the baffle, and each slider is intermittently slidably attached to each hinge dial plate. When the hinge dial plate is pushed and flipped into the dial plate groove by the upward movement of the slider, it is blocked by the baffle and inclined towards the slider.

[0009] Preferably, a plurality of partition plates are fixedly connected around the outer wall of the rotary drum, filter cotton sheets are arranged between every two adjacent partition plates, a mesh plate for placing activated carbon is fixedly connected in the inner wall of each filter cotton sheet, the two ends of the outer walls of every two adjacent partition plates and the filter cotton sheets are adhesively connected by installing magic tapes, and the outer wall of each filter cotton sheet is intermittently attached and slidably connected with the inner wall of the circular groove plate box.

[0010] Preferably, the pressing and sucking structure includes a sleeve rod movably sleeved on the outer wall of the pressing cylinder. One end plate body of the sleeve rod can be intermittently attached and connected with a seesaw plate. The bottom end plate body of the seesaw plate is fixedly connected with the top outer wall of the circular groove plate box. An L-shaped top plate is arranged above the top end plate body on the side of the seesaw plate away from the sleeve rod. An elastic member is jointly fixedly connected between the inner wall of the L-shaped top plate and the top outer wall of the seesaw plate. A ball rod is movably sleeved in the bottom end plate body of one side of the seesaw plate; a T-shaped scraping plate is fixedly connected to the bottom end rod body of the ball rod. The T-shaped scraping plate can be intermittently attached and slidably connected with the inner wall of each filter cotton sheet. A hole groove plate is fixedly connected to the outer wall of the smooth plate body at one end of the T-shaped scraping plate. A plate groove for fitting and sliding connection with the T-shaped scraping plate and the hole groove plate is formed through the circular groove plate box.

[0011] Preferably, two folding soft plates I are fixedly connected in the top inner wall of the hole groove plate. The two ends of the outer walls of the two folding soft plates I can be attached and slidably connected with the inner wall of the hole groove plate, and two rectangular grooves are formed through the outer walls of the two ends of the hole groove plate.

[0012] Preferably, two ear plates are fixedly connected to the bottom ends of the two folding soft plates I. The bottom outer walls of the two groups of ear plates are fixedly connected with the top outer wall of the circular groove plate box. The two groups of ear plates are attached and slidably connected with the inner walls of the two groups of rectangular grooves. A folding soft plate II is jointly fixedly connected between the top outer walls of the two groups of ear plates and the top inner walls of the two groups of rectangular grooves. The two ends of the outer walls of each folding soft plate II are respectively attached and slidably connected with the inner wall of each rectangular groove.

[0013] Preferably, a moving plate is further fixedly connected to the rod body of the ball rod. A support plate is attached and slidably connected to one end outer wall of the moving plate. The plate body of the support plate is fixedly connected with the outer wall of the circular groove plate box. A corrugated pipe is jointly fixedly connected between the top outer wall of the moving plate and the bottom outer wall of the support plate. A suction pipe is jointly and fixedly connected through the plate bodies of the moving plate and the hole groove plate. A conveying pipe is fixedly connected through the plate body of the support plate. One-way valves are fixedly connected to the pipe bodies of the suction pipe and the conveying pipe.

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

[0015] The present invention also provides a filtering method using the filtering device for a ventilator, the filtering method comprising the following steps:

[0016] S1, by manually pressing the pressing cylinder on the circular groove plate box, the pressing cylinder is forced to move downward and squeeze the spring at the same time. The downward pressing cylinder will also synchronously drive multiple sliders to slide down in multiple slide grooves opened in the rotating cylinder, thereby pressing against the hinge plate in the paddle plate groove to apply pressure to it. When each slider continues to passively press the hinge plate downward, the rotating cylinder is forced to rotate to a certain extent, and then the slider can be separated from the hinge plate and enter the inclined groove after the rotating cylinder is passively rotated;

[0017] S2, the slider slides downward along the path of the inclined groove to the bottom. During this process, the rotating drum will drive the partition, the filter cotton sheet and the screen plate to rotate at the same time, thereby aligning the clean filter cotton sheet with the air inlet pipe;

[0018] S3, then first rotate the sleeve rod connected to the pressing cylinder to adjust the angle so that it is aligned with one side of the seesaw, then release the pressing cylinder, and the spring drives it to reset and move upward, so that when the sleeve rod is moved upward, it will push up the seesaw, causing the plate to tilt in the opposite direction, and at the same time stretch the elastic member installed on the L-shaped top plate to deform it, so that the tilted seesaw will simultaneously drive the T-arc scraper and the hole groove plate to move down between the adjacent partitions, and contact the inner wall of the filter cotton sheet to scrape and clean the dust on the inner wall, and will also synchronously drive the moving plate to move down and stretch the support plate The bellows installed on the upper part will have suction force inside the stretched bellows, which will generate suction force on the inner wall of the hole slot plate through the suction pipe, so as to collect dust from the filter cotton sheets in the two partitions after use and replacement. At the same time, the upward slider will slide over the hinge plate and push it into the plate slot. When the spring elastic force automatically stretches to its maximum elastic force and stops moving upward, the slider moves upward over the hinge plate, and each slider is still in the corresponding slot. The hinge plate that is no longer under pressure will automatically leave the plate slot due to its own gravity due to the existence of the baffle.

[0019] S4, after the filter cotton piece is used for one rotation, the T-shaped block on the bottom plate and the T-shaped slot in the round slot box are separated, thereby stretching the spring, and then the drum can be directly pulled down and moved out of the round slot box, and then a support tool can be used to create a gap between the round slot box and the bottom plate, and the filter cotton piece can be replaced as a whole.

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

[0021] (1) A filter device for a ventilator provided by the present invention can synchronously achieve two major functions, namely the rotation and replacement of a filter cotton sheet and the in-place cleaning and dust removal, through a single pressing operation by the user. This not only completely changes the traditional maintenance mode where the filter cotton sheet needs to be manually replaced during downtime or can only be replaced but not cleaned, greatly improving the operation convenience for the user, reducing the maintenance burden, and reducing the risk of potential treatment interruption, but also helps to continuously maintain the low ventilation resistance and stable working performance of the filter device by actively and immediately maintaining the cleanliness of the surface of the filter cotton sheet, thereby effectively extending the actual service life of the filter consumables and ensuring the effectiveness and safety of respiratory treatment.

[0022] (2) A filter device for a ventilator provided by the present invention not only realizes the convenient replacement of the filter cotton sheet but also integrates complex mechanical actions into a simple pressing operation. Specifically, when the user presses the pressing cylinder on the circular groove plate box, it is forced to move downward and simultaneously squeeze the spring. The downward-moving pressing cylinder will also synchronously drive a plurality of sliders to slide downward in a plurality of chutes opened in the rotating cylinder, thereby entering the inclined groove connected to the bottom end of the chute. By moving downward, it slides along the path of the inclined groove. Furthermore, the sliding of the slider in the inclined groove will drive the rotating cylinder to rotate, and the rotating rotating cylinder will simultaneously drive the partition plate, the filter cotton sheet, and the mesh plate to rotate, thereby switching the position of the filter cotton sheet.

[0023] (3) A filter device for a ventilator provided by the present invention can not only effectively clean the surface of the filter cotton sheet while replacing it but also realize the automatic collection of the dust falling off during the cleaning process, avoiding the dispersion of dust. Specifically, during the passive downward movement of the pressing cylinder, it will indirectly drive the connected T-shaped arc-shaped scraper and the hole groove plate to move downward into the partition plate, thereby contacting the inner wall of the filter cotton sheet. The surface of the filter cotton sheet will be scraped by the T-shaped arc-shaped scraper to clean the dust on the surface. At the same time, it will also drive the moving plate to move downward to stretch the corrugated pipe installed on the support plate. A suction force will appear inside the stretched corrugated pipe, and thus a suction force will be generated on the inner wall of the hole groove plate through the suction pipe, thereby sucking and collecting the dust on the filter cotton sheets in the two partition plates after replacement. Description of the Drawings

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

[0025] Figure 2 is a schematic diagram of the partial sectional split structure of the filter part of the present invention;

[0026] Figure 3 is of the present invention Figure 2 is a schematic diagram of the partial enlarged structure at A in the present invention;

[0027] Figure 4 is a schematic diagram of the partial sectional split structure of the filter part of the present invention;

[0028] Figure 5 Schematic diagram of the partial split structure of the filter part of the present invention;

[0029] Figure 6 Schematic diagram of the partial sectional structure of the hole groove plate of the present invention;

[0030] Figure 7 For the present invention Figure 6 Schematic diagram of the partially enlarged structure at position B in the present invention;

[0031] Figure 8 For the present invention Figure 6 Schematic diagram of the partially enlarged structure at position C in the present invention;

[0032] Figure 9 Schematic diagram of the partial planar structure of the sliding groove and inclined plane groove of the present invention;

[0033] Figure 10 Schematic diagram of the overall structure of the rocker of the present invention;

[0034] Figure 11 Schematic diagram of the overall structure of the T-shaped arc-shaped scraper of the present invention.

[0035] In the figure: 100, ventilator body; 101, intake pipe; 200, filter part; 201, round groove plate box; 202, bottom plate; 203, T-shaped block; 204, T-shaped slot; 205, pressing cylinder; 206, spring; 207, slider; 208, rotating cylinder; 209, sliding groove; 2091, dial plate groove; 2092, hinge dial plate; 210, inclined plane groove; 211, partition board; 212, filter cotton sheet; 213, mesh plate; 214, sleeve rod; 2141, rocker; 2142, L-shaped top plate; 2143, elastic member; 2144, ball rod; 215, T-shaped arc-shaped scraper; 216, hole groove plate; 217, first folding soft plate; 218, ear plate; 219, second folding soft plate; 220, moving plate; 221, support plate; 222, bellows; 223, suction pipe; 224, delivery pipe; 225, one-way valve; 226, dust collection box; 227, drawer. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] It should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc. indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0038] It should be understood that in the description of the invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense.

[0039] Embodiment 1: Refer to the attached Figures 1 to 11 , the present invention provides a filtering device for a ventilator, including a ventilator body 100. One end side wall of the ventilator body 100 is fixedly connected through a through hole with an air inlet pipe 101. A filtering part 200 is provided on the air inlet pipe 101. The filtering part 200 includes a circular groove plate box 201. One end plate body of the circular groove plate box 201 is fixedly connected through a through hole with the other end pipe body of the air inlet pipe 101. A bottom plate 202 is closely attached to the outer wall of the bottom end of the circular groove plate box 201. A plurality of T-shaped clamping blocks 203 are fixedly connected in a surrounding manner on the outer wall of the top end of the bottom plate 202. Each T-shaped clamping block 203 is made of natural rubber material. And T-shaped clamping grooves 204 that can be intermittently and closely clamped with each T-shaped clamping block 203 are also provided in a surrounding manner in the inner wall of the bottom end of the circular groove plate box 201. An inclined air inlet groove is provided through the side wall of the top end of the circular groove plate box 201. And a pressing cylinder 205 is slidably connected through the center position of the top end of the circular groove plate box 201. An elastic rotating structure is jointly provided between the pressing cylinder 205 and the inner wall of the circular groove plate box 201. And a pressing and suction structure is jointly provided between the pressing cylinder 205 and the outer wall of the circular groove plate box 201.

[0040] It should be noted that the ventilator is started to draw air through the air inlet pipe 101 and the inclined air inlet groove on the circular groove plate box 201. The drawn air will be automatically filtered by the filter cotton sheet 212 and the net plate 213 filled with activated carbon. The addition of activated carbon can purify and filter the air more comprehensively. Manually press the pressing cylinder 205 on the circular groove plate box 201, so that it moves downward under force and simultaneously compresses the spring 206, causing the spring 206 to deform. The existence of the spring 206 is convenient for driving the pressing cylinder 205 to automatically move upward and reset later. It will also synchronously drive a plurality of sliders 207 to slide downward in a plurality of sliding grooves 209 opened in the rotating cylinder 208, and thus enter the inclined groove 210 connected to the bottom end of the sliding groove 209. By moving downward, it slides according to the path of the inclined groove 210. Furthermore, the sliding of the slider 207 in the inclined groove 210 will drive the rotating cylinder 208 to rotate. The rotating rotating cylinder 208 will simultaneously drive the partition plate 211, the filter cotton sheet 212 and the net 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 bottom plate 202. A plurality of sliders 207 are fixedly connected to the outer wall of the pressing cylinder 205 near the bottom end in a circumferential manner. A rotating cylinder 208 is slidably connected to the pressing cylinder 205 in a fitting manner. The bottom end of the rotating cylinder 208 is rotatably connected to the outer wall of the top end of the bottom plate 202 in a fitting manner. A chute 209 capable of fittingly slidingly connecting with each slider 207 is formed in the inner wall of the top end of the rotating cylinder 208. The top and bottom positions of every two adjacent chutes 209 are jointly connected in a circumferential and communicating manner with an inclined groove 210 formed in the inner wall of the rotating cylinder 208. Each slider 207 can intermittently fit and slide on the inner wall of the inclined groove 210;

[0042] A dial plate groove 2091 is formed in the inner wall of one end near the top of each chute 209. A hinged dial plate 2092 is hinged in the inner wall of each dial plate groove 2091. A baffle is fixedly connected to the inner wall of one end of each dial plate groove 2091. Each hinged dial plate 2092 is intermittently and fittingly connected to the inner wall of each dial plate groove 2091 and the outer wall of one end of the baffle. Each slider 207 is intermittently and fittingly slidably connected to each hinged dial plate 2092. When the hinged dial plate 2092 is pushed and flipped into the dial plate groove 2091 by the upward movement of the slider 207, it is blocked by the baffle and tilted towards the slider 207. A plurality of partition plates 211 are fixedly connected to the outer wall of the rotating cylinder 208 in a circumferential manner. A filter cotton sheet 212 is provided between every two adjacent partition plates 211. A net plate 213 for placing activated carbon is fixedly connected to the inner wall of each filter cotton sheet 212. The two ends of every two adjacent partition plates 211 and the filter cotton sheet 212 are adhesively connected by mounting magic tapes. The outer wall of each filter cotton sheet 212 is intermittently and fittingly slidably connected to the inner wall of the round groove plate box 201.

[0043] It is not difficult to understand that when replacing the filter cotton sheet 212, it is only necessary to manually press the pressing cylinder 205 on the circular groove box 201, so that it is forced to move downward and squeeze the spring 206, so that the spring 206 is deformed. The existence of the spring 206 facilitates the subsequent automatic upward reset of the pressing cylinder 205. The downwardly moved pressing cylinder 205 will also synchronously drive multiple sliders 207 to slide down in multiple slide grooves 209 provided in the rotating cylinder 208, thereby pressing against the hinge plate 2092 in the plate groove 2091 to apply pressure to it. When each slider 207 is continuously pressed together, Dynamically pressing down the hinge plate 2092 will cause the drum 208 to be subjected to force and produce a certain degree of rotation, and then the slider 207 can be separated from the hinge plate 2092 and enter the inclined groove 210 after the drum 208 is passively rotated, thereby driving the drum 208 to continue to rotate. The rotating drum 208 will also drive the partition plate 211, the filter cotton sheet 212 and the mesh plate 213 to rotate, thereby moving the unused filter cotton sheet 212 to the air inlet pipe 101. The filter cotton sheet 212 can be replaced autonomously for multiple times, and there is no need to shut down the ventilator body 100 during the replacement.

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

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

[0046] Two folding soft plates 217 are fixedly connected to the inner wall at the top end of the hole groove plate 216. The outer walls at both ends of the two folding soft plates 217 can be in sliding connection with the inner wall of the hole groove plate 216. Two rectangular grooves are penetrated and opened on the outer walls at both ends of the hole groove plate 216. Two ear plates 218 are fixedly connected to the bottom ends of the two folding soft plates 217. The outer walls at the bottom ends of the two groups of ear plates 218 are fixedly connected to the outer wall at the top end of the circular groove plate box 201. The two groups of ear plates 218 are in sliding connection with the inner walls of the two rectangular grooves. A folding soft plate 219 is jointly and fixedly connected between the outer walls at the top ends of the two groups of ear plates 218 and the inner walls at the top ends of the two rectangular grooves. The outer walls at both ends of each folding soft plate 219 are respectively in sliding connection with the inner walls of each rectangular groove.

[0047] It should be noted that before the manual pressure on the pressing cylinder 205 is removed and it can be driven to reset and move upward by the spring 206, the sleeve rod 214 connected to the pressing cylinder 205 needs to be rotated and adjusted in angle so that it aligns with one side plate of the rocker 2141. Thus, when the sleeve rod 214 is driven to move upward, it will push up the rocker 2141, causing its plate body to tilt in the reverse direction. At the same time, the elastic member 2143 installed on the L-shaped top plate 2142 is stretched and deformed. Therefore, the tilted rocker 2141 will drive the T-shaped scraper 215 and the hole groove plate 216 to move downward between the adjacent partition plates 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 of the hole groove plate 216, the ear plates 218 fixedly installed on the circular groove plate box 201 will press the folding soft plate 217 and the folding soft plate 219 connected inside it, causing both of them to fold simultaneously. Nano coatings are applied to the surfaces of the folding soft plate 217 and the folding soft plate 219, making it difficult for dust to adhere. Thus, as the hole groove plate 216 gradually moves downward, the blockage of its plate body is removed, facilitating the subsequent suction of dust through the hole groove plate 216 without sucking the air outside the circular groove plate box 201, and only focusing on the dust absorption of the filter cotton sheet 212 inside the circular groove plate box 201.

[0049] A moving plate 220 is also fixedly connected to the rod body of the cue 2144. A support plate 221 is slidably connected to the outer wall of one end of the moving plate 220 in a fitting manner. The plate body of the support plate 221 is fixedly connected to the outer wall of the circular groove plate box 201. A bellows 222 is fixedly connected jointly between the outer wall of the top end of the moving plate 220 and the outer wall of the bottom end of the support plate 221. A suction pipe 223 is fixedly connected jointly and penetratingly between the plate body of the moving plate 220 and the plate body of the hole groove plate 216. A conveying pipe 224 is fixedly connected penetratingly to the plate body of the support plate 221. One-way valves 225 are fixedly connected to the pipe bodies of the suction pipe 223 and the conveying pipe 224 respectively. The other end of the conveying pipe 224 is fixedly connected penetratingly to a dust collection box 226. The outer wall of the bottom end of the dust collection box 226 is fixedly connected to the plate body of the support plate 221. A drawer 227 is slidably connected in a fitting manner to the inner wall of one end of the dust collection box 226.

[0050] It is not difficult to understand that during the passive downward movement of the cue 2144, the moving plate 220 will also be driven to move downward synchronously, stretching the bellows 222 installed on the support plate 221. A suction force will appear inside the stretched bellows 222, and thus a suction force will be generated on the inner wall of the hole groove plate 216 through the suction pipe 223, so as to suck and collect the dust on the filter cotton sheets 212 in the two partition plates 211 after use and replacement. When the sleeve rod 214 is driven to reset and move upward passively, the bellows 222 will be squeezed to generate a squeezing force inside it, and thus the previously sucked dust can be squeezed and output through the conveying pipe 224 and input into the connected dust collection box 226 and fall into the drawer 227. Subsequently, only by pulling out the drawer 227 can the dust be cleaned. The one-way valves 225 installed on the suction pipe 223 and the conveying pipe 224 can only make the two have the one-way effects of only allowing entry but not exit and only allowing exit but not entry respectively.

[0051] It should be added that the squeezing and suction structure is to prevent the dust on the filter cotton sheet 212 from vibrating due to separation when the filter cotton sheet 212 is replaced, so as to fall into the circular groove plate box 201. Therefore, it is cleaned in advance. After the filter cotton sheet 212 is used in a circular rotation, by separating the T-shaped clamping block 203 on the bottom plate 202 from the T-shaped clamping groove 204 in the circular groove plate box 201, the spring 206 is stretched, and then the rotating cylinder 208 can be directly pulled down and removed from the circular groove plate box 201. Then, a supporting tool can be used to create a distance between the circular groove plate box 201 and the bottom plate 202, which is convenient for the overall replacement of the filter cotton sheet 212. Because the surface of the filter cotton sheet 212 has been cleaned previously, no dust and some bacteria will float in the air during the whole replacement process. Thus, the filtering service time of the filter cotton sheet 212 for the ventilator body 100 is greatly extended, and it is not necessary to replace it every three months. However, even if it is not used, all the filter cotton sheets 212 need to be replaced in about two years to prevent the growth of bacteria.

[0052] It should be noted that the started ventilator body 100 draws air through the air inlet pipe 101 and the oblique air inlet groove on the circular groove plate box 201. The drawn-in gas will be automatically filtered by the filter cotton sheet 212 and the mesh plate 213 filled with activated carbon. The addition of activated carbon can more comprehensively purify and filter the gas. Each T-shaped block 203 is made of natural rubber.

[0053] The present invention also provides a filtering method using the filtering device for a ventilator, the filtering method comprising the following steps:

[0054] S1, by manually pressing the pressing cylinder 205 on the circular groove plate box 201, the pressing cylinder 205 is forced to move downward and squeeze the spring 206. The downward pressing cylinder 205 will also synchronously drive multiple sliders 207 to slide down in multiple slide grooves 209 provided in the rotating cylinder 208, thereby pressing against the hinge plate 2092 in the plate groove 2091 to apply pressure to it. When each slider 207 continues to passively press the hinge plate 2092 downward, the rotating cylinder 208 is forced to rotate to a certain extent, and then the slider 207 can be separated from the hinge plate 2092 and enter the inclined groove 210 after the rotating cylinder 208 is passively rotated, thereby driving the rotating cylinder 208 to continue to rotate;

[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 drives the partition plate 211, the filter cotton sheet 212 and the mesh plate 213 to rotate at the same time, thereby aligning the clean filter cotton sheet 212 with the air inlet pipe 101;

[0056] S3, then first rotate the sleeve rod 214 connected to the pressing cylinder 205 to adjust the angle so that it is aligned with one side of the seesaw 2141, then release the pressing cylinder 205, and the spring 206 drives it to reset and move upward, so that when the sleeve rod 214 is moved upward, it will push up the seesaw 2141, causing the plate to tilt in the opposite direction, and at the same time stretch the elastic member 2143 installed on the L-shaped top plate 2142 to deform it, so that the tilted seesaw 2141 will simultaneously drive the T-arc scraper 215 and the hole groove 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 the inner wall, and will also synchronously drive the moving plate 220 to move down and stretch the support plate 221 The bellows 222 installed on the upper part will have suction force inside the stretched bellows 222, thereby generating suction force on the inner wall of the hole slot plate 216 through the suction pipe 223, so as to absorb and collect dust from the filter cotton sheets 212 in the two partitions 211 after use and replacement. At the same time, the upward sliding block 207 will fit and slide over the hinge plate 2092, pushing it up into the plate slot 2091. When the elastic force of the spring 206 automatically stretches to its maximum elastic force and stops moving upward, the sliding block 207 moves upward over the hinge plate 2092, and each sliding block 207 is still in the corresponding slide slot 209. The hinge plate 2092, which is no longer under pressure, will automatically leave the plate slot 2091 due to its own gravity due to the existence of the baffle.

[0057] S4, after the filter cotton sheet 212 is used for a circle of rotation, the T-shaped block 203 on the bottom plate 202 and the T-shaped slot 204 in the circular slot box 201 are separated, thereby stretching the spring 206, and then the drum 208 can be directly pulled down and moved out of the circular slot box 201, and then a support tool can be used to create a gap between the circular slot box 201 and the bottom plate 202, so as to facilitate the overall replacement of the filter cotton sheet 212. Since the surface of the filter cotton sheet 212 has been cleaned before, the entire replacement process will not generate dust and some bacteria floating in the air, thereby greatly extending the filtering use time of the filter cotton sheet 212 for the ventilator body 100.

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

Claims

1. A filtering device for a ventilator, comprising a ventilator body (100), characterized in that: One end side wall of the ventilator body (100) is fixedly connected through with an air inlet pipe (101). A filtering part (200) is arranged on the air inlet pipe (101). The filtering part (200) includes a circular groove plate box (201). One end plate body of the circular groove plate box (201) is fixedly connected through with the other end pipe body of the air inlet pipe (101). A bottom plate (202) is closely attached and connected to the outer wall of the bottom end of the circular groove plate box (201). A plurality of T-shaped clamping blocks (203) are fixedly connected in a surrounding manner on the outer wall of the top end of the bottom plate (202). And T-shaped clamping grooves (204) capable of being intermittently and closely clamped with each T-shaped clamping block (203) are also arranged in a surrounding manner in the inner wall of the bottom end of the circular groove plate box (201). An inclined air inlet groove is arranged through in the side wall of the top end of the circular groove plate box (201). And a pressing cylinder (205) is connected through and slidably arranged at the center position of the top end of the circular groove plate box (201). An elastic rotating structure is jointly arranged between the pressing cylinder (205) and the inner wall of the circular groove plate box (201). And a pressing and sucking structure is jointly arranged between the pressing cylinder (205) and the outer wall of the circular groove plate box (201).

2. The filtering device for a ventilator according to claim 1, characterized in that: The elastic rotating structure includes a spring (206) fixedly connected inside 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 bottom plate (202). A plurality of sliding blocks (207) are fixedly connected in a surrounding manner on the outer wall of the pressing cylinder (205) near the bottom end. A rotating cylinder (208) is slidably attached to the pressing cylinder (205).

3. The filtering device for a ventilator according to claim 2, wherein: The bottom end of the rotating cylinder (208) is rotatably attached to the outer wall of the top end of the bottom plate (202). A sliding groove (209) capable of being slidably attached to each sliding block (207) is arranged in the inner wall of the top end of the rotating cylinder (208). Inclined grooves (210) are jointly arranged in a surrounding manner and communicated with the top and bottom positions of the inner wall of the rotating cylinder (208) between every two adjacent sliding grooves (209). Each sliding block (207) can be intermittently and slidably attached to the inner wall of the inclined groove (210). In the inner wall of one end near the top of each sliding groove (209), a dial plate groove (2091) is arranged. A hinged dial plate (2092) is hinged in the inner wall of each dial plate groove (2091). A baffle is fixedly connected to the inner wall of one end of each dial plate groove (2091). Each hinged dial plate (2092) is intermittently attached to the inner wall of each dial plate groove (2091) and the outer wall of one end of the baffle. Each sliding block (207) is intermittently slidably attached to each hinged dial plate (2092). After the hinged dial plate (2092) is squeezed and flipped into the dial plate groove (2091) when the sliding block (207) moves upward, it is blocked by the baffle and inclined towards the sliding block (207).

4. The filter device for a ventilator according to claim 2, wherein: A plurality of partition plates (211) are fixedly connected around the outer wall of the rotary drum (208). A filter cotton sheet (212) is provided between every two adjacent partition plates (211). A mesh plate (213) for placing activated carbon is fixedly connected in the inner wall of each filter cotton sheet (212). The two ends of the outer walls of every two adjacent partition plates (211) and the filter cotton sheet (212) are adhesively connected by installing magic tapes. The outer wall of each filter cotton sheet (212) is intermittently fitted and slidably connected with the inner wall of the circular groove plate box (201).

5. The filtering device for a ventilator according to claim 4, characterized in that: The pressing and suction structure includes a sleeve rod (214) movably sleeved on the outer wall of the pressing cylinder (205). One end plate of the sleeve rod (214) can be intermittently fitted and connected with a rocker (2141). The bottom end plate of the rocker (2141) is fixedly connected with the top outer wall of the circular groove plate box (201). Above the top end plate on the side of the rocker (2141) away from the sleeve rod (214), there is an L-shaped top plate (2142). A elastic member (2143) is jointly fixedly connected between the inner wall of the L-shaped top plate (2142) and the top outer wall of the rocker (2141). A ball rod (2144) is movably sleeved in one side bottom end plate of the rocker (2141); A T-shaped arc-shaped scraper (215) is fixedly connected to the bottom end rod of the ball rod (2144). The T-shaped arc-shaped scraper (215) can be intermittently fitted and slidably connected with the inner wall of each filter cotton sheet (212). A hole groove plate (216) is fixedly connected to the outer wall of the smooth plate at one end of the T-shaped arc-shaped scraper (215). A plate groove for fitting and sliding connection with the T-shaped arc-shaped scraper (215) and the hole groove plate (216) is formed through the circular groove plate box (201).

6. The filter device for a ventilator according to claim 5, wherein: Two folding soft plates one (217) are fixedly connected in the top inner wall of the hole groove plate (216). The outer walls of the two ends of the two folding soft plates one (217) can be fitted and slidably connected with the inner wall of the hole groove plate (216), and two rectangular grooves are formed through the outer walls at both ends of the hole groove plate (216).

7. The filtering device for a ventilator according to claim 6, characterized in that: Two ear plates (218) are fixedly connected to the bottom ends of the two folding soft plates one (217). The outer walls of the bottom ends of the two groups of ear plates (218) are fixedly connected with the top outer wall of the circular groove plate box (201). The two groups of ear plates (218) are fitted and slidably connected with the inner walls of the two groups of rectangular grooves, and a folding soft plate two (219) is jointly fixedly connected between the outer walls of the top ends of the two groups of ear plates (218) and the inner walls of the top ends of the two groups of rectangular grooves. The outer walls of the two ends of each folding soft plate two (219) are respectively fitted and slidably connected with the inner wall of each rectangular groove.

8. The filtering device for a ventilator according to claim 5, characterized in that: The rod body of the ball rod (2144) is also fixedly connected to a moving plate (220), and a support plate (221) is slidably connected to the outer wall of one end of the moving plate (220), and the plate body of the support plate (221) is fixedly connected to the outer wall of the circular groove plate box (201), and a bellows (222) is fixedly connected between the top outer wall of the moving plate (220) and the bottom outer wall of the support plate (221), and a suction pipe (223) is fixedly connected between the plate body of the moving plate (220) and the plate body of the hole groove plate (216), and a delivery pipe (224) is fixedly connected to the plate body of the support plate (221), and a one-way valve (225) is fixedly connected to the pipe body of the suction pipe (223) and the delivery pipe (224).

9. The filtering device for a ventilator according to claim 8, characterized in that: A dust box (226) is fixedly connected to the tube body at the other end of the delivery pipe (224), the outer wall of the bottom end of the dust box (226) is fixedly connected to the plate body of the support plate (221), and a drawer (227) is slidably connected to the inner wall of one end of the dust box (226).

10. The filtering method of the filtering device for a ventilator according to any one of claims 1-9, characterized in that: The filtering method comprises the following steps: S1, by manually pressing the pressing cylinder (205) on the circular groove plate box (201), the pressing cylinder (205) is forced to move downward and squeeze the spring (206), and the downwardly moving pressing cylinder (205) also synchronously drives multiple sliders (207) to slide down in multiple slide grooves (209) provided in the rotating cylinder (208), thereby pressing against the hinge plate (2092) in the plate groove (2091) to apply pressure thereto, and when each slider (207) continuously and passively presses the hinge plate (2092) downward, the rotating cylinder (208) is forced to rotate to a certain extent, and then the slider (207) can be separated from the hinge plate (2092) and enter the inclined groove (210) after the rotating cylinder (208) is passively rotated; S2, the slider (207) slides downward along the path of the inclined groove (210) to the bottom end. During this process, the rotating drum (208) drives the partition plate (211), the filter cotton sheet (212) and the mesh plate (213) to rotate at the same time, thereby aligning the clean filter cotton sheet (212) with the air inlet pipe (101); S3, then the sleeve rod (214) connected to the pressing cylinder (205) is first rotated to adjust the angle so that it is aligned with one side of the seesaw (2141), and then the pressing cylinder (205) is released, and the spring (206) drives it to reset and move upward, so that when the sleeve rod (214) is moved upward, it will push up the seesaw (2141), causing the plate to tilt in the opposite direction, and at the same time stretch the elastic member (2143) installed on the L-shaped top plate (2142) to deform, so that the tilted seesaw (2141) will simultaneously drive the T-arc scraper (215) and the hole groove plate (216) to move down to between the adjacent partitions (211), and contact the inner wall of the filter cotton sheet (212) to scrape and clean the dust on the inner wall, and will also synchronously drive the moving plate (220) to move down to stretch the support plate (221). The bellows (222) installed on the upper part will generate suction force inside the stretched bellows (222), thereby generating suction force on the inner wall of the hole slot plate (216) through the suction pipe (223), thereby sucking and collecting dust from the filter cotton sheets (212) in the two partitions (211) after use and replacement. At the same time, the upwardly moving slider (207) will slide over the hinge plate (2092) and push it up into the plate slot (2091). When the elastic force of the spring (206) automatically stretches to its maximum elastic force and no longer moves upward, the slider (207) moves upward over the hinge plate (2092), and each slider (207) is still in the corresponding slide slot (209). The hinge plate (2092) that is no longer under pressure will automatically leave the plate slot (2091) due to its own gravity due to the existence of the baffle. S4, after the filter cotton sheet (212) is used for one rotation, the T-shaped block (203) on the bottom plate (202) and the T-shaped slot (204) in the circular slot box (201) are separated, thereby stretching the spring (206), and then the rotating drum (208) can be directly pulled down and moved out of the circular slot box (201), and then a space can be created between the circular slot box (201) and the bottom plate (202) with the help of a supporting tool, and the filter cotton sheet (212) can be replaced as a whole.

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