Air filtering device for medical fresh air conditioner

Abstract

The invention discloses an air filtering device for a medical fresh air conditioner, and particularly relates to the technical field of air purification, the air filtering device comprises a shell and a maintenance door arranged on the front side of the shell and used for maintenance and overhaul, and an air filtering structure communicated with an air inlet pipe is arranged in the middle of an inner cavity of the shell; a self-cleaning structure used for keeping the air filtering structure clean is arranged at the upper end of the shell, a drawer groove is formed in the lower end of the shell, and a dust collecting box used for collecting dust is arranged on the inner surface of the drawer groove. Incoming air is filtered and sterilized through cooperation of the shell and the air filtering structure, the air filtering structure is kept clean through cooperation of the shell and the self-cleaning structure so as to guarantee the filtering effect, dust is collected through cooperation of the shell, the drawer groove and the dust collecting box, cleaning is convenient, and secondary pollution is avoided; through cooperation of the shell and the maintenance door, convenience is brought to overhaul and maintenance of workers, and through cooperation of the shell and the air outlet pipe, clean air is exhausted to provide fresh air for the medical environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air purification, in particular to an air filtering device for a medical fresh air conditioner. BACKGROUND

[0002] The technical field of air purification includes the removal and treatment of particulate pollutants, gaseous pollutants and microorganisms in the air. The core content is to realize air purification by physical, chemical or biological means acting on different types of pollutants. This field as a whole covers multi-level filtration system physical purification, HEPA uses the force between fibers to capture particles larger than 0.3 microns, electrostatic precipitation charges particles by high-voltage electrodes, adsorption chemical purification relies on activated carbon and other materials to adsorb or manganese dioxide to catalytically decompose pollutants, and biological purification relies on the action of plants or biological enzyme preparations. The technical system can be adapted to indoor and outdoor environments according to application scenarios, among which the medical scenario needs to combine with the ventilation system to realize the dual control of pollutants and microorganisms.

[0003] One of the air filtering devices for a medical fresh air conditioner refers to an air filtering component adapted to a medical fresh air conditioner system. The technical matters it aims at include particulate matter interception, microorganism treatment and filter structure maintenance. Particulate matter interception is achieved by setting a dust removal core layer inside the dust removal filter core, which uses a hierarchical interception method of coarse filtration and fine filter core layer for different particle sizes. Microorganism treatment uses a UV lamp tube inserted in the middle of the sterilization core seat to act on the air flowing through the flow guide groove by ultraviolet light. The filter structure maintenance adopts a split design, the dust removal filter core, the sterilization core seat and the purification filter core are embedded in the filter core mounting seat inside by installing guide blocks and installing guide grooves, the filter core mounting seat and the purification box seat are embedded by guide protrusions and guide grooves and are fixed by fastening bolts. The purification filter core also has an adsorption core layer inside for treating gaseous pollutants.

[0004] The prior art only relies on split filter core installation design for maintenance, without setting a work station switching mechanism, filter pipe cleaning needs to be stopped, which causes operation interruption, affects the supply of fresh air in the medical environment, lacks self-cleaning structure, relies on manual cleaning of the filter core, the cleaning process is easy to cause secondary pollution and low efficiency, without designing a dust removal auxiliary structure, air leakage may occur, reducing the filtration efficiency, multiple components need to be disassembled for maintenance, the operation is cumbersome, and it is difficult to quickly complete the repair, affecting the ability of the device to continuously guarantee the air purification of the medical environment. SUMMARY

[0005] The main purpose of the present application is to provide an air filtering device for a medical fresh air conditioner, which can effectively solve the problems involved in the background art.

[0006] To achieve the above purpose, the technical scheme adopted by the present application is: The utility model provides an air filtering device for medical fresh air conditioning, including the shell, the air inlet pipe for accessing the air flow channel is set to the lower part of rear side of shell, the air outlet pipe for discharging the air after purifying is set to the upper part of rear side of shell, the maintenance door for maintaining overhauling is set to the front side of shell, the air filtering structure is set to the middle part of shell inner chamber and is communicated with air inlet pipe, the self cleaning structure for keeping air filtering structure clean is set to the upper end of shell, the drawer groove is opened to the lower end of shell, the dust collecting box for collecting dust is set to the inner surface of drawer groove.

[0007] Preferably, the air filtering structure includes a partition plate symmetrically installed in the inner chamber of the shell, the inner surfaces of the two partition plates are jointly connected to a drive shaft driven by a motor, the outer surface of the drive shaft is symmetrically fixedly connected to a connecting disc, the outer surfaces of the two connecting discs are fixedly connected to a hoop through a connecting rod, and the inner surfaces of the two hoops are jointly fixedly installed with filter tubes for filtering air.

[0008] Preferably, the outer surface of the drive shaft is fixedly connected to an ultraviolet lamp for killing bacteria in the middle part, the upper ends of the two partition plates are each provided with three through holes corresponding to the filter tubes in a ring-shaped distribution around the ultraviolet lamp, the four through holes on the rear side are communicated with the air inlet pipe, the inner surface of the air inlet pipe is provided with a solenoid valve for blocking air flow, the two through holes on the front side are respectively communicated with the self-cleaning structure and the dust collecting box, and the inner surface of the through hole located on the lower part of the front side is provided with a dust discharging auxiliary structure.

[0009] Preferably, the inner wall of the filter tube is fixedly connected to a support plate in a ring-shaped distribution for supporting, a plurality of limiting grooves extending through the support plate to the lower end of the filter tube are formed in the upper end of the filter tube in a ring-shaped distribution, and the outer surface of the filter tube and the outer surface of the support plate are jointly fixedly connected to a filter screen for filtering air impurities.

[0010] Preferably, the self-cleaning structure includes a mounting plate mounted on the upper end of the shell, the inner surface of the mounting plate is provided with a hollow groove communicated with the adjacent through hole at the upper side of the dust collecting box, the inner surface of the hollow groove is provided with a cleaning assembly for cleaning the filter tube, a winding shaft for driving the cleaning assembly to act is rotatably installed in the inner chamber of the mounting plate, and the winding shaft is driven by a motor.

[0011] Preferably, the cleaning assembly includes a limiting cylinder fixedly installed on the inner wall of the hollow groove, a plurality of T-shaped grooves matched with the limiting grooves are formed in the inner wall of the limiting cylinder in a ring-shaped distribution, an electric turntable is interactively connected to the inner wall of the limiting cylinder, a cleaning piece is rotatably installed at the lower end of the electric turntable, a counterweight is fixedly connected to the lower end of the cleaning piece, and a cable is fixedly connected to the outer surface of the winding shaft at the upper end of the electric turntable.

[0012] Preferably, the lower end of the electric rotating disc is provided with a ventilation groove in communication with the upper end, and a plurality of T-shaped blocks matched with the T-shaped groove and the limiting groove are fixedly connected to the outer surface of the electric rotating disc in a ring shape, and a motor is arranged on the inner side of the electric rotating disc, and the motor output end is drivingly connected with the cleaning member through a shaft coupling and drives the cleaning member to rotate.

[0013] Preferably, a plurality of silica gel scrapers are fixedly connected to the upper and lower parts of the outer surface of the cleaning member in a ring shape, and a brush ring is rotatably connected to the upper and lower parts of the outer surface of the cleaning member, the brush directions of the two brush rings are opposite, and a friction wheel is rotatably connected to the inner cavity of the cleaning member and tightly abuts against the two brush rings, and the two friction wheels are driven by the motor installed in the inner cavity of the cleaning member, and when the friction wheels rotate, the brush rings are driven to rotate, and the rotating directions of the two brush rings are opposite.

[0014] Preferably, a dust discharging groove is formed in the lower end of the cleaning member, a fan is fixedly installed on the top wall in the inner cavity of the dust discharging groove, an arc-shaped flow guide plate is fixedly connected to the inner wall on the upper side of the dust discharging groove, and a dust suction groove in communication with the dust discharging groove is formed in the middle part of the outer surface of the cleaning member.

[0015] Preferably, the dust discharging auxiliary structure comprises a fixed plate fixedly installed on the inner wall of the through hole on the lower part of the front side, a spring is fixedly connected to the upper end of the fixed plate, an active plate is slidingly connected to the inner wall of the through hole on the upper end of the spring, a plurality of L-shaped grooves in communication with the inner cavity of the drawer groove are formed in the inner wall of the through hole on the lower part of the front side in a ring shape, and the air inlet side of the L-shaped groove is located on the lower side of the active plate in the initial state.

[0016] Compared with the prior art, the present application has the following beneficial effects: 1、 The present application realizes stable entry of external air through the cooperation of the shell and the air inlet pipe, filters and sterilizes the entering air through the cooperation of the shell and the air filtering structure, keeps the air filtering structure clean through the cooperation of the shell and the self-cleaning structure to ensure the filtering effect, collects dust through the cooperation of the shell and the drawer groove and the dust collecting box and facilitates cleaning to avoid secondary pollution, facilitates the maintenance and repair of the staff through the cooperation of the shell and the maintenance door, and discharges clean air through the cooperation of the shell and the air outlet pipe to provide fresh air for the medical environment.

[0017] 2、 The application forms a filtering space by the cooperation of the partition plate, the driving shaft and the filter pipe, simultaneously provides installation support for the components and ensures the airflow to flow in the space; the cooperation of the driving shaft, the connecting disc, the hoop and the filter pipe realizes the switching of the filter pipe between the working position and the cleaning position, without stopping to improve the continuity of the device operation; the cooperation of the driving shaft and the ultraviolet lamp sterilizes the air passing through the filter pipe, removes the bacteria and microorganisms to protect the cleanliness of the output air; the cooperation of the partition plate, the through hole, the air inlet pipe, the self-cleaning structure and the dust collection box provides a channel for the airflow and dust flow; the cooperation of the filter pipe and the support plate provides support for the filter pipe, prevents it from deforming under the impact of the airflow and enhances the overall strength; the cooperation of the filter pipe, the limiting groove and the filter screen assists the positioning of the self-cleaning structure and simultaneously intercepts the impurities in the air.

[0018] 3、 The application provides an installation base for the self-cleaning components through the cooperation of the mounting plate, the winding shaft and the cleaning assembly, provides an action space and an access channel for the cleaning assembly through the cooperation of the mounting plate, the hollow groove and the through hole, controls the up-down movement of the cleaning assembly through the cooperation of the winding shaft, the cable and the electric turntable, limits and guides the electric turntable through the cooperation of the limiting cylinder, the T-shaped groove and the electric turntable, drives the rotation of the cleaning piece through the cooperation of the electric turntable, the motor and the cleaning piece, removes the dust on the filter pipe and the filter screen through the cooperation of the cleaning piece, the silica gel scraper and the brush ring, collects the dust through the cooperation of the cleaning piece, the fan, the dust suction groove and the dust discharge groove, and guarantees the airflow circulation in the filter pipe through the cooperation of the electric turntable and the ventilation groove.

[0019] 4、 The application provides a fixed support for the spring through the cooperation of the fixed plate of the dust discharge auxiliary structure and the spring, and ensures the stable installation of the spring; the spring is used to automatically reset the movable plate through the cooperation of the spring and the movable plate, and the movable plate can slide up and down in the through hole and be pushed down when the dust accumulates through the cooperation of the movable plate and the inner wall of the through hole; the L-shaped groove becomes a channel for the dust to enter the dust collection box through the cooperation of the through hole and the L-shaped groove, and the movable plate blocks the air from leaking from the L-shaped groove in the initial state to guarantee the filtering efficiency, and the movable plate can open the channel to discharge the dust after being moved down. DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the application; Figure 2 It is a schematic diagram of the cross-sectional structure of the shell of the application; Figure 3 It is a schematic diagram of the air filtering structure of the application; Figure 4 It is a schematic diagram of the position of the through hole of the application; Figure 5 It is a schematic diagram of the Figure 4 It is an enlarged schematic diagram of the local structure at A in the middle of the application; Figure 6 Structure diagram of self-cleaning structure of the application; Figure 7 Structure diagram of cleaning assembly of the application; Figure 8 Structure diagram of cleaning piece of the application; Figure 9 Structure diagram of internal structure of cleaning piece of the application; Figure 10 Structure diagram of dust discharging auxiliary structure of the application.

[0021] In the figure: 1, shell; 11, drawer slot; 2, dust collection box; 21, dust discharging auxiliary structure; 211, movable plate; 212, L-shaped slot; 213, spring; 214, fixed plate; 3, maintenance door; 4, self-cleaning structure; 41, mounting plate; 42, hollow slot; 43, cleaning assembly; 431, limiting cylinder; 4311, T-shaped slot; 432, cable; 433, electric rotating disc; 4331, ventilation slot; 4332, T-shaped block; 434, cleaning piece; 4341, silica gel scraper; 4342, brush ring; 4343, dust suction slot; 4344, fan; 4345, friction wheel; 4346, arc-shaped flow guide plate; 4347, dust discharging slot; 435, counterweight; 44, winding shaft; 5, air inlet pipe; 51, electromagnetic valve; 6, air filtering structure; 61, drive shaft; 62, hoop; 63, ultraviolet lamp; 64, connecting disc; 65, partition plate; 651, through hole; 66, filter pipe; 661, filter screen; 662, limiting slot; 663, support plate; 7, air outlet pipe. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, purposes and effects achieved by the application easy to understand, the application is further described below in combination with specific embodiments.

[0023] Embodiment one, an air filtering device for a medical fresh air conditioner, referring to Figure 1 and Figure 2 , comprising a shell 1, the shell 1 serves as the basic support structure of the whole device, providing stable installation and working space for the internal components, an air inlet pipe 5 is arranged at the lower part of the rear side of the shell 1 for accessing the air flow channel, external air can enter the interior of the shell 1 through the air inlet pipe 5, which is the main channel for air to enter the device, an air outlet pipe 7 is arranged at the upper part of the rear side of the shell 1 for discharging purified air, clean air after filtering and sterilization can be discharged from the shell 1 through the air outlet pipe 7 to deliver fresh air to the medical environment, a maintenance door 3 is arranged at the front side of the shell 1 for maintenance and repair, the staff can perform maintenance and repair on the internal components of the device by opening the maintenance door 3, such as replacing the filter screen 661, checking the working state of the ultraviolet lamp 63, etc., greatly facilitating the later maintenance work; The middle part of the inner cavity of the shell 1 is provided with an air filtering structure 6 communicated with the air inlet pipe 5, the air filtering structure 6 is a core component for filtering and sterilizing the air entering the device, and can effectively remove impurities and bacterial microorganisms in the air, the upper end of the shell 1 is provided with a self-cleaning structure 4 for keeping the air filtering structure 6 clean, the self-cleaning structure 4 can automatically clean the filter screen 661 of the filter pipe 66 in the air filtering structure 6, so as to avoid affecting the filtering effect due to dust accumulation on the filter screen 661, and reduce the frequency and workload of manual cleaning, and the lower end of the shell 1 is provided with a drawer slot 11, the drawer slot 11 provides a mounting position for the dust collecting box 2, and the inner surface of the drawer slot 11 is provided with the dust collecting box 2 for collecting dust, the dust cleaned by the self-cleaning structure 4 can be collected into the dust collecting box 2, and the dust collecting box 2 can be regularly taken out from the drawer slot 11 for cleaning, so as to facilitate maintenance and avoid secondary pollution of dust to the air. During the operation of the embodiment, the external air is stably introduced through the cooperation of the shell 1 and the air inlet pipe 5, the introduced air is filtered and sterilized through the cooperation of the shell 1 and the air filtering structure 6, the air filtering structure 6 is kept clean through the cooperation of the shell 1 and the self-cleaning structure 4 to ensure the filtering effect, the dust is collected and cleaned through the cooperation of the shell 1, the drawer slot 11 and the dust collecting box 2 to avoid secondary pollution, the staff can conveniently overhaul and maintain through the cooperation of the shell 1 and the maintenance door 3, and the clean air is discharged through the cooperation of the shell 1 and the air outlet pipe 7 to provide fresh air for the medical environment.

[0024] In the second embodiment, the filter space is formed by the cooperation of the partition plate 65, the driving shaft 61 and the filter pipe 66 on the basis of the first embodiment, and the cooperation of the driving shaft 61, the connecting disc 64, the hoop 62 and the filter pipe 66 realizes the switching of the filter pipe 66 between the working position and the cleaning position without stopping to improve the continuity of the device operation, the cooperation of the driving shaft 61 and the ultraviolet lamp 63 sterilizes the air passing through the filter pipe 66 to remove bacterial microorganisms and ensure the cleanliness of the output air, the cooperation of the partition plate 65, the through hole 651, the air inlet pipe 5, the self-cleaning structure 4 and the dust collecting box 2 provides a channel for the flow of air and dust, the cooperation of the filter pipe 66 and the support plate 663 supports the filter pipe 66 to prevent it from being deformed under the impact of air flow and enhance the overall strength, and the cooperation of the filter pipe 66, the limiting groove 662 and the filter screen 661 assists the positioning of the self-cleaning structure 4 and intercepts impurities in the air.

[0025] Further, refer to Figure 3The air filtering structure 6 comprises two partitions 65 symmetrically arranged in the inner cavity of the shell 1, which not only provide mounting support for the driving shaft 61 and the filter pipe 66, but also form a filtering space together with the filter pipe 66, so that the air flow can flow accurately in the filtering space. The middle part of the inner surface of the two partitions 65 is rotationally connected with the driving shaft 61 driven by the motor. The driving shaft 61 can rotate under the driving of the motor, providing power for the switching of the filter pipe 66. The outer surface of the driving shaft 61 is fixedly connected with the connecting disc 64 symmetrically. The connecting disc 64 connects the driving shaft 61 and the hoop 62, and transmits the rotating power of the driving shaft 61 to the hoop 62. The outer surface of the two connecting discs 64 is fixedly connected with the hoop 62 through the connecting rod. The hoop 62 can fix the filter pipe 66, so that the filter pipe 66 will not be loose or deviated during rotation with the driving shaft 61. The inner surface of the two hoops 62 is fixedly connected with the filter pipe 66 for filtering air. The filter pipe 66 is the main carrier for air filtering, and the filter screen 661 on the outer surface of the filter pipe 66 can filter the impurities in the air. When the device is normally filtering, the two filter pipes 66 at the rear are in the working position. When cleaning is needed, the driving shaft 61 drives the filter pipe 66 to rotate, so that the filter pipe 66 with dust can be switched to the cleaning position, and the clean filter pipe 66 can be switched to the working position, realizing non-stop switching of the filter pipe 66 and improving the continuity of the device operation.

[0026] Further, referring to Figure 3 and Figure 4The middle part of the outer surface of the drive shaft 61 is fixed with an ultraviolet lamp 63 for killing bacteria. The ultraviolet lamp 63 works continuously during the air passing through the filter tube 66, and uses ultraviolet rays to sterilize the air passing through the filter tube 66, effectively removing the bacterial microorganisms in the air, ensuring the cleanliness of the output air, and meeting the strict requirements of the medical environment for air sterility. The upper end of each baffle 65 is provided with three through holes 651 corresponding to the filter tube 66 along the annular distribution of the ultraviolet lamp 63. The through holes 651 provide a channel for the flow of air and dust. The four through holes 651 on the rear side are in communication with the air inlet pipe 5, ensuring that the air entering from the air inlet pipe 5 can flow accurately through the rear through holes 651 to the filter tube 66 in the working position. An electromagnetic valve 51 is installed on the inner surface of the air inlet pipe 5 to block the airflow. When the device is normally filtering, the electromagnetic valve 51 is opened to ensure smooth airflow through the air inlet pipe 5 into the device. When the filter tube 66 needs to be switched and cleaned, the electromagnetic valve 51 is temporarily closed to block the air inlet, preventing unfiltered air from mixing or cleaning dust from spreading and polluting. The two through holes 651 on the front side are in communication with the self-cleaning structure 4 and the dust collection box 2, respectively. The front through hole 651 connected with the self-cleaning structure 4 facilitates the cleaning assembly 43 of the self-cleaning structure 4 to enter the inside of the filter tube 66 to be cleaned. The front through hole 651 connected with the dust collection box 2 facilitates the dust swept to be discharged into the dust collection box 2. The inner surface of the through hole 651 located at the lower front side is provided with a dust discharge auxiliary structure 21. The dust discharge auxiliary structure 21 can assist the dust to be discharged smoothly into the dust collection box 2, and prevent air leakage from the through hole 651 during normal filtering when there is no dust accumulation, ensuring the filtering efficiency. Further, referring to Figure 4 and Figure 5 , the inner wall of the filter tube 66 is fixedly connected with a support plate 663 for support. The support plate 663 not only provides stable support for the filter tube 66 to prevent it from deforming under the impact of airflow, but also enhances the overall strength of the filter tube 66, prolonging its service life. The upper end of the filter tube 66 is annularly provided with a plurality of limiting grooves 662 extending through the support plate 663 to the lower end of the filter tube 66. The limiting grooves 662 can cooperate with the T-shaped blocks 4332 on the outer surface of the electric turntable 433 in the self-cleaning structure 4 to ensure that the electric turntable 433 can accurately enter the inside of the filter tube 66 and remain stable during movement, providing accurate positioning for subsequent cleaning work. The outer surface of the filter tube 66 and the outer surface of the support plate 663 are fixedly connected with a filter screen 661 for filtering air impurities. The filter screen 661 is a key component for filtering impurities in the air. When air flows through the filter tube 66, the filter screen 661 can effectively intercept dust, particulate matter and other impurities in the air, ensuring the cleanliness of the air entering the subsequent process. By arranging the filter screen 661 on the outer surface of the filter tube 66 and the outer surface of the support plate 663, the filtering area is maximized, and the filtering efficiency is improved. In the third embodiment, the mounting plate 41 cooperates with the winding shaft 44 and the cleaning assembly 43 to provide a mounting base for the self-cleaning component, cooperates with the hollow groove 42 and the through hole 651 to provide a movement space and an access channel for the cleaning assembly 43, cooperates with the winding shaft 44, the cable 432 and the electric turntable 433 to control the up-and-down movement of the cleaning assembly 43, cooperates with the limiting cylinder 431, the T-shaped groove 4311 and the electric turntable 433 to limit and guide the electric turntable 433, cooperates with the electric turntable 433, the motor and the cleaning piece 434 to drive the cleaning piece 434 to rotate and clean, cooperates with the cleaning piece 434, the silica gel scraper 4341 and the brush ring 4342 to remove dust from the filter tube 66 and the filter screen 661, cooperates with the cleaning piece 434, the fan 4344, the dust suction groove 4343 and the dust discharge groove 4347 to collect dust, and cooperates with the electric turntable 433 and the ventilation groove 4331 to ensure airflow circulation in the filter tube 66.

[0027] Further, referring to Figure 6 The self-cleaning structure 4 includes a mounting plate 41 mounted on the upper end of the shell 1, which provides a mounting base for the winding shaft 44, the cleaning assembly 43 and other components, ensuring that each component of the self-cleaning structure 4 can be stably mounted on the upper end of the shell 1. The inner surface of the mounting plate 41 has a hollow groove 42 on the upper side of the dust collecting box 2, which communicates with the adjacent through hole 651 and provides space for the storage and movement of the cleaning assembly 43. The hollow groove 42 communicates with the adjacent through hole 651, which facilitates the cleaning assembly 43 to enter the inside of the filter tube 66 to be cleaned through the hollow groove 42 and the through hole 651. The inner surface of the hollow groove 42 is provided with a cleaning assembly 43 for cleaning the filter tube 66. The cleaning assembly 43 is the core component for realizing the self-cleaning of the filter tube 66, which can clean the dust on the inner wall of the filter tube 66 and the inner surface of the filter screen 661 in all directions, avoiding dust residue. The mounting plate 41 has a winding shaft 44 installed in the inner cavity to drive the cleaning assembly 43 to move. The winding shaft 44 is driven by the motor, which can be reversed to control the up-and-down movement of the cleaning assembly 43 by releasing or retracting the cable 432, realizing the action of the cleaning assembly 43 entering the filter tube 66 for cleaning and resetting after cleaning. Further, referring to Figure 7The cleaning assembly 43 comprises a limiting cylinder 431 fixedly installed on the inner wall of the hollow groove 42, the limiting cylinder 431 can limit and guide the movement of the electric turntable 433, and ensure that the electric turntable 433 remains stable during the up-down movement. A plurality of T-shaped grooves 4311 are arranged in the inner wall of the limiting cylinder 431 in a ring shape and are matched with the limiting grooves 662. The T-shaped grooves 4311 are matched with the T-shaped blocks 4332 on the outer surface of the electric turntable 433, which further improves the stability and accuracy of the movement of the electric turntable 433 and prevents the electric turntable 433 from deviating or rotating during the movement. The electric turntable 433 is slidably connected to the inner wall of the limiting cylinder 431. The electric turntable 433 can not only drive the cleaning piece 434 to move up and down, but also drive the cleaning piece 434 to rotate by the motor arranged on the inner side, thereby providing power for the cleaning action of the cleaning piece 434. The cleaning piece 434 is rotatably installed at the lower end of the electric turntable 433. The cleaning piece 434 is a component for directly cleaning the filter pipe 66 and the filter screen 661. The silicone scraper 4341 and the brush ring 4342 on the surface of the cleaning piece 434 can effectively remove dust. The counterweight 435 is fixedly connected to the lower end of the cleaning piece 434. The counterweight 435 can utilize its own gravity to drive the electric turntable 433 and the cleaning piece 434 to move downward along the inner wall of the limiting cylinder 431 when the cable 432 is released from the winding shaft 44, thereby ensuring that the cleaning assembly 43 can smoothly enter the inside of the filter pipe 66 to be cleaned. The cable 432 is woundly connected to the outer surface of the winding shaft 44. The cable 432 is a key component for connecting the electric turntable 433 and the winding shaft 44. The winding shaft 44 controls the movement of the electric turntable 433 and the cleaning piece 434 by releasing and retracting the cable 432. Further, referring to Figure 8 The lower end of the electric turntable 433 is provided with a ventilation groove 4331 in a ring shape and in communication with the upper end. During the cleaning process, the ventilation groove 4331 can ensure the airflow circulation in the filter pipe 66, avoid the airflow blockage caused by the occupation of the inside space of the filter pipe 66 by the cleaning assembly 43, and ensure the smooth cleaning work. A plurality of T-shaped blocks 4332 are fixedly connected to the outer surface of the electric turntable 433 in a ring shape and are matched with the T-shaped grooves 4311 and the limiting grooves 662. The T-shaped blocks 4332 are matched with the T-shaped grooves 4311 of the limiting cylinder 431 and the limiting grooves 662 of the filter pipe 66, thereby forming double positioning and guiding. The double positioning and guiding can not only ensure that the electric turntable 433 accurately enters the inside of the filter pipe 66, but also ensure that the electric turntable 433 remains stable during the up-down movement and driving the cleaning piece 434 to rotate, thereby providing protection for the accuracy and stability of the cleaning work. A motor is arranged on the inner side of the electric turntable 433. The motor output end is drivingly connected to the cleaning piece 434 through a shaft coupling and drives the cleaning piece 434 to rotate. The motor provides power for the rotation of the cleaning piece 434. The rotation force of the motor is stably transmitted to the cleaning piece 434 through the shaft coupling, so that the cleaning piece 434 can stably rotate and clean the inner wall of the filter pipe 66 and the inner surface of the filter screen 661. Further, referring to Figure 8 and Figure 9 The upper and lower outer surfaces of the cleaning member 434 are annularly and fixedly connected with a plurality of silica gel scrapers 4341. The silica gel scrapers 4341 are soft and elastic, and can closely adhere to the inner wall of the filter tube 66 and the inner surface of the filter screen 661 during the rotation of the cleaning member 434, effectively scraping the dust attached to the surface, without damaging the filter tube 66 and the filter screen 661. The upper and lower outer surfaces of the cleaning member 434 are rotatably connected with brush rings 4342. The brush directions of the two brush rings 4342 are opposite. The upper brush ring 4342 can sweep the dust on the upper part of the filter screen 661 downward, and the lower brush ring 4342 can sweep the dust on the lower part of the filter screen 661 upward. Through this reverse sweeping mode, the inner surface of the filter screen 661 can be swept in all directions, avoiding dust residue and improving the cleaning effect. The inner cavities of the cleaning member 434 are left-right symmetrically and rotatably connected with friction wheels 4345 that closely adhere to the two brush rings 4342. The two friction wheels 4345 are driven by the motor installed in the inner cavities of the cleaning member 434. When the friction wheels 4345 rotate, they drive the brush rings 4342 to rotate in opposite directions. The motor provides power for the rotation of the friction wheels 4345. The friction wheels 4345 drive the brush rings 4342 to rotate through the friction between them. By reasonably setting the rotation directions of the two friction wheels 4345, the reverse rotation of the two brush rings 4342 can be realized, meeting the needs of all-round cleaning. Further, referring to Figure 8 and Figure 9 A dust discharge groove 4347 is formed at the lower end of the cleaning member 434. The dust discharge groove 4347 is used for temporarily storing the swept dust, providing a channel for the discharge of the dust. A fan 4344 is fixedly installed on the top wall of the inner cavity of the dust discharge groove 4347. During the cleaning process, the fan 4344 is started to generate negative pressure, and the swept dust is sucked into the dust discharge groove 4347 through the dust suction groove 4343, ensuring that the dust can be collected in time and avoiding the spread of dust inside the filter tube 66. An arc-shaped flow guide plate 4346 is fixedly connected to the inner wall of the dust discharge groove 4347. The arc-shaped flow guide plate 4346 can guide the airflow generated by the fan 4344, so that the airflow can more smoothly carry the dust into the dust discharge groove 4347, ensuring that the dust enters the dust discharge groove 4347 smoothly and improving the dust collection efficiency. A dust suction groove 4343 is formed in the middle of the outer surface of the cleaning member 434 and communicates with the dust discharge groove 4347. The dust suction groove 4343 is the entrance for the dust to enter the dust discharge groove 4347. It is formed in the middle of the outer surface of the cleaning member 434, which can more comprehensively collect the swept dust, ensuring that the dust swept from the upper and lower parts can enter the dust discharge groove 4347 through the dust suction groove 4343. In the fourth embodiment, the fixed plate 214 of the dust discharging auxiliary structure 21 is fixedly installed on the inner wall of the through hole 651, and provides fixed support for the spring 213 to ensure stable installation of the spring 213; the spring 213 is in cooperation with the movable plate 211, and the elastic reset function of the spring 213 is used to drive the movable plate 211 to automatically reset when there is no dust accumulation; the movable plate 211 is in cooperation with the inner wall of the through hole 651, and can slide up and down in the through hole 651, and can be pushed to move downward when dust accumulates; the through hole 651 is in cooperation with the L-shaped groove 212, and the L-shaped groove 212 becomes a channel for dust to enter the dust collecting box 2, and the movable plate 211 blocks air from leaking from the L-shaped groove 212 in the initial state to ensure the filtering efficiency, and the movable plate 211 can open the channel to discharge dust after moving downward.

[0028] Further, referring to Figure 10 , the dust discharging auxiliary structure 21 includes a fixed plate 214 fixedly installed on the inner wall of the through hole 651 at the lower front side, the fixed plate 214 provides fixed support for the spring 213 to ensure stable installation of the spring 213 on the inner wall of the through hole 651, the upper end of the fixed plate 214 is fixedly connected with the spring 213, the spring 213 has an elastic reset function and can drive the movable plate 211 to automatically reset when there is no dust accumulation on the movable plate 211, the upper end of the spring 213 is fixedly connected with the movable plate 211 which is in sliding connection with the inner wall of the through hole 651, the movable plate 211 can slide up and down on the inner wall of the through hole 651, when dust accumulates in the through hole 651, the gravity of the dust gradually overcomes the elastic force of the spring 213 to push the movable plate 211 to move downward, the inner wall of the through hole 651 at the lower front side is annularly distributed with a plurality of L-shaped grooves 212 which are in communication with the inner cavity of the drawer slot 11, the L-shaped grooves 212 are channels for dust to enter the dust collecting box 2 from the through hole 651, when the movable plate 211 moves to below the air inlet side of the L-shaped groove 212, the dust in the through hole 651 enters the dust collecting box 2 in the drawer slot 11 through the L-shaped groove 212, the air inlet side of the L-shaped groove 212 is located below the movable plate 211 in the initial state, and this initial position can block air from leaking from the L-shaped groove 212 through the movable plate 211 when the movable plate 211 is not moved to ensure the filtering efficiency during normal filtering, and the air inlet channel of the L-shaped groove 212 can be smoothly opened after the movable plate 211 moves downward to realize discharge of dust.

[0029] The basic principles and main features of the present application and the advantages of the present application have been shown and described. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and all these changes and improvements fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An air filtration device for a medical fresh air conditioning system, comprising a housing (1), an air inlet pipe (5) disposed at the lower rear side of the housing (1) for connecting to an airflow channel, an air outlet pipe (7) disposed at the upper rear side of the housing (1) for discharging purified air, and a maintenance door (3) disposed at the front side of the housing (1) for maintenance and repair, characterized in that: An air filter structure (6) connected to the air inlet pipe (5) is provided in the middle of the inner cavity of the outer shell (1). A self-cleaning structure (4) for keeping the air filter structure (6) clean is provided at the upper end of the outer shell (1). A drawer slot (11) is provided at the lower end of the outer shell (1). A dust collection box (2) for collecting dust is provided on the inner surface of the drawer slot (11).

2. The air filtration device for medical fresh air conditioning according to claim 1, characterized in that: The air filtration structure (6) includes partitions (65) symmetrically installed in the inner cavity of the outer shell (1). The inner surfaces of the two partitions (65) are rotatably connected to a drive shaft (61) driven by a motor. The outer surfaces of the drive shaft (61) are symmetrically fixedly connected to connecting discs (64). The outer surfaces of the two connecting discs (64) are fixedly connected to hoops (62) by connecting rods. The inner surfaces of the two hoops (62) are fixedly installed with filter tubes (66) for filtering air.

3. The air filtration device for medical fresh air conditioning according to claim 2, characterized in that: The drive shaft (61) has an ultraviolet lamp (63) for killing bacteria fixed in the middle of its outer surface. The upper ends of the two partitions (65) are provided with three through holes (651) corresponding to the filter tubes (66) in a ring distribution along the ultraviolet lamp (63). The four through holes (651) on the rear side are connected to the air inlet pipe (5). The inner surface of the air inlet pipe (5) is equipped with a solenoid valve (51) for blocking the airflow. The two through holes (651) on the front side are connected to the self-cleaning structure (4) and the dust collection box (2) respectively. The inner surface of the through hole (651) located at the lower front side is provided with a dust removal auxiliary structure (21).

4. The air filtration device for medical fresh air conditioning according to claim 3, characterized in that: The filter tube (66) has a support plate (663) fixedly connected to the inner wall of the filter tube (66) in a ring. The upper end of the filter tube (66) has a plurality of limiting grooves (662) that extend from the support plate (663) to the lower end of the filter tube (66). The outer surface of the filter tube (66) and the outer surface of the support plate (663) are fixedly connected to a filter screen (661) for filtering air impurities.

5. The air filtration device for medical fresh air conditioning according to claim 4, characterized in that: The self-cleaning structure (4) includes a mounting plate (41) installed on the upper end of the outer shell (1). The inner surface of the mounting plate (41) located on the upper side of the dust collection box (2) has a hollow groove (42) communicating with the adjacent through hole (651). The inner surface of the hollow groove (42) is provided with a cleaning component (43) for cleaning the filter tube (66). The inner cavity of the mounting plate (41) is rotatably mounted with a winding shaft (44) that drives the cleaning component (43) to move. The winding shaft (44) is driven by a motor.

6. The air filtration device for medical fresh air conditioning according to claim 5, characterized in that: The cleaning component (43) includes a limiting cylinder (431) fixedly installed on the inner wall of the hollow groove (42). The inner wall of the limiting cylinder (431) is provided with a plurality of T-shaped grooves (4311) that are adapted to the limiting groove (662). The inner wall of the limiting cylinder (431) is interactively connected to an electric turntable (433). A cleaning component (434) is rotatably installed at the lower end of the electric turntable (433). A counterweight (435) is fixedly connected at the lower end of the cleaning component (434). A cable (432) that is wound and connected to the outer surface of the winding shaft (44) is fixedly connected at the upper end of the electric turntable (433).

7. The air filtration device for medical fresh air conditioning according to claim 6, characterized in that: The lower end of the electric turntable (433) is provided with ventilation slots (4331) that communicate with its upper end. The outer surface of the electric turntable (433) is provided with a number of T-shaped blocks (4332) that are compatible with the T-shaped slots (4311) and the limiting slots (662). The inner side of the electric turntable (433) is provided with a motor, the output end of which is connected to the cleaning component (434) through a coupling and thereby drives the cleaning component (434) to rotate.

8. The air filtration device for medical fresh air conditioning according to claim 7, characterized in that: The upper and lower parts of the outer surface of the cleaning component (434) are each fixedly connected with a number of silicone scrapers (4341) in a ring. The upper and lower parts of the outer surface of the cleaning component (434) are each rotatably connected with a brush ring (4342). The two brush rings (4342) have opposite brush directions. The inner cavity of the cleaning component (434) is symmetrically rotatably connected with friction wheels (4345) that are in close contact with the brush rings (4342) on both sides. The two friction wheels (4345) are driven by a motor installed in the inner cavity of the cleaning component (434). When the friction wheels (4345) rotate, they drive the brush rings (4342) to rotate, and the two brush rings (4342) rotate in opposite directions.

9. The air filtration device for medical fresh air conditioning according to claim 8, characterized in that: The cleaning component (434) has a dust discharge groove (4347) at its lower end. A fan (4344) is fixedly installed on the top wall of the inner cavity of the dust discharge groove (4347). An arc-shaped guide plate (4346) is fixedly connected to the upper side of the inner wall of the dust discharge groove (4347). A suction groove (4343) communicating with the dust discharge groove (4347) is opened in the middle of the outer surface of the cleaning component (434).

10. The air filtration device for medical fresh air conditioning according to claim 3, characterized in that: The dust removal auxiliary structure (21) includes a fixed plate (214) fixedly installed on the inner wall of the through hole (651) at the lower front side. A spring (213) is fixedly connected to the upper end of the fixed plate (214). A movable plate (211) that is slidably connected to the inner wall of the through hole (651) is fixedly connected to the upper end of the spring (213). Several L-shaped grooves (212) that communicate with the inner cavity of the drawer groove (11) are arranged in a ring on the inner wall of the through hole (651) at the lower front side. The air intake side of the L-shaped groove (212) is located below the movable plate (211) in the initial state.

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