Medical air purifier

Abstract

The present application relates to air equipment processing technical field, specifically to a kind of medical air purifier, including shell, purification pipe is equipped in shell, purification pipe one end is connected with air inlet, and the other end of purification pipe is communicated with ventilation duct system;The gas flow direction of purification pipe is equipped with first filter chamber, second filter chamber, third filter chamber and disinfection chamber in sequence, metal net is installed in first filter chamber, activated carbon net is installed in second filter chamber, HEPA net is installed in third filter chamber, and ultraviolet lamp is installed in disinfection chamber;Fan mechanism for sucking air inlet is equipped in first filter chamber, and the two sides of first filter chamber are equipped with alternate mechanism for replacing metal net based on the weight change of metal net;Activated carbon net center is equipped with funnel-shaped collection net, and cleaning mechanism for regularly scraping accumulated impurities on collection net is equipped on collection net;The present application is used to actively replace processing according to the impurity accumulation of filter screen, and air purification effect is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of air treatment technology, and more specifically to a medical air purifier. Background Technology

[0002] In places such as operating rooms, ICUs, infectious disease wards, and medical laboratories, there are extremely high requirements for air cleanliness. Even tiny pollutants can cause serious infection problems. Therefore, medical air purifiers have become an indispensable device to ensure air quality.

[0003] Currently, medical air purifiers are typically connected to the air intake of a ventilation duct system on the wall or ceiling, using multi-layered isolation equipment to filter the air. For example, filters of different diameters are used to remove larger particulate impurities from the air, activated carbon filters are used to effectively adsorb harmful gases and odors from the air, HEPA filters are used to efficiently filter extremely small particles such as bacteria and viruses from the air, and ultraviolet light is used to kill bacteria and viruses, in order to meet the air quality requirements of medical facilities.

[0004] However, during long-term operation, filter components such as the filter screen gradually accumulate a large amount of impurities, affecting the filtration effect and requiring regular disassembly and replacement. Secondly, the internal structure of existing air purifiers is relatively complex, and the disassembly process is cumbersome, easily leading to untimely replacement and exceeding the product's lifespan. Therefore, this invention provides a medical air purifier that reminds users to replace the filter screen based on the accumulation of impurities, ensuring effective air purification. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a medical air purifier that reminds users to replace the filter based on the accumulation of impurities, thereby ensuring effective air purification.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A medical air purifier includes a housing, an air inlet on one side of the housing, a purification pipe inside the housing, one end of the purification pipe being connected to the air inlet, and the other end of the purification pipe being connected to a ventilation duct system; the purification pipe is provided with a first filter chamber, a second filter chamber, a third filter chamber, and a disinfection chamber in sequence along the gas flow direction; a metal mesh is installed in the first filter chamber, an activated carbon mesh is installed in the second filter chamber, a HEPA mesh is installed in the third filter chamber, and an ultraviolet lamp is installed in the disinfection chamber;

[0007] The first filter chamber is equipped with a fan mechanism for drawing in air, and the two sides of the first filter chamber are equipped with an alternating mechanism for replacing the metal mesh based on the weight change of the metal mesh.

[0008] The activated carbon mesh is barrel-shaped, with a funnel-shaped collection net in the center. The collection net is equipped with a cleaning mechanism for periodically scraping off the accumulated impurities.

[0009] Furthermore, the fan mechanism includes a rectangular support frame, which is connected to the purification pipe. A first motor is fixedly connected inside the support frame, and the output shaft of the first motor is fixedly connected to the fan blades. The metal mesh includes a first metal mesh and a second metal mesh, with the first metal mesh located at the air inlet end of the fan mechanism and the second metal mesh located at the air outlet end of the fan mechanism.

[0010] The fan blades are equipped with a paddle mechanism around them. The paddle mechanism includes a collection groove located at the bottom of the first metal mesh. A receiving plate is slidably fitted in the collection groove. A first support rod is fixedly connected to one side of the receiving plate. A central shaft is rotatably fitted at the center of the first support rod. The central shaft is fixedly connected to the first metal mesh. A contact piece is provided on the side of the first support rod away from the receiving plate.

[0011] When the receiving plate moves to its lowest point, the contact piece is within the rotation range of the fan blade; when the receiving plate moves to its highest point, the contact piece separates from the fan blade.

[0012] Furthermore, the alternating mechanism includes several rollers, which are located above the first filter chamber. The rollers are rotatably engaged with the housing, and gears mesh between adjacent rollers. The gears are rotatably engaged with the housing, and the gears are coaxially fixedly connected to the rollers. Coil springs are fixedly connected to both ends of the rollers, with one end of the coil spring fixedly connected to the roller and the other end of the coil spring fixedly connected to the housing.

[0013] Several pull ropes are wound on the roller, and the end of the pull rope away from the roller is fixedly connected to the top of the second metal mesh. The second metal mesh is slidably engaged with the support frame.

[0014] The second metal mesh has mounting rods that slide on both sides. The mounting rods are symmetrically arranged with the second metal mesh as the center. Several plastic strips are fixedly connected between adjacent mounting rods. The plastic strips slide on the support frame and are located in the air intake direction of the first filter chamber.

[0015] The second metal mesh has an L-shaped clamping block on the side away from the plastic strip. The center of the clamping block is rotatably engaged with the support frame. The clamping blocks are symmetrically arranged around the second metal mesh. Both sides of the second metal mesh have placement slots corresponding to the mounting rods. The shape of the placement slots corresponds to the shape of the clamping blocks.

[0016] A spring is fitted on the mounting rod, and the spring is located between the clamping block and the plastic strip. The spring is used to push the end of the mounting rod away from the plastic strip to abut against the clamping block.

[0017] When the second metal mesh is located in the first filter chamber, the coil spring is in a coiled state, the end of the clamping block away from the mounting rod is located in the placement groove, the spring is in a naturally extended state, the mounting rod and the clamping block abut against each other, and the end of the clamping block near the mounting rod is in a vertical state; when the weight of the plastic overcomes the spring force, the spring is in a compressed state, the mounting rod and the clamping block separate, the end of the clamping block near the mounting rod rotates towards the side of the second metal mesh, and the end of the clamping block away from the mounting rod is located outside the placement groove, the coil spring releases its coiling force and drives the roller to rotate.

[0018] Furthermore, a torsion spring is fitted at the rotating part of the clamping block, and a limiting block is provided on the side of the clamping block away from the second metal mesh to keep the clamping block in a vertical state. The limiting block is fixedly connected to the support frame. The torsion spring is used to maintain the clamping block at a 30-degree angle along the surface of the limiting block in the normal state.

[0019] Furthermore, a magnet layer is fixedly connected to the connection between the clamping block and the mounting rod.

[0020] Furthermore, a second motor is coaxially and fixedly connected to the roller, the second motor is fixedly connected to the housing, and the second motor is electrically connected to a control panel;

[0021] The control panel is electrically connected to a pressure sensor and an electromagnet for adsorbing the mounting rod and moving it away from the clamping block. The electromagnet is located inside the second metal mesh and on the side of the mounting rod away from the clamping block. The pressure sensor is located at the bottom of the second metal mesh and is used to measure real-time pressure data when the second metal mesh is in contact with the support frame.

[0022] The control panel is used to compare the real-time pressure data with the set start value. If the real-time pressure data is greater than the start value, a start command is sent to the electromagnet and a delayed start command is sent to the second motor. If the real-time pressure data is less than the start value, a standby command is sent to the electromagnet and the second motor.

[0023] Furthermore, the outer diameter of the collection net is the same as the inner diameter of the activated carbon net; the cleaning mechanism includes a third motor fixedly connected to the collection net, the third motor being electrically connected to the control panel, and the control panel activating the third motor when the real-time pressure data exceeds the start value; a scraper is fixedly connected to the output end of the third motor, the scraper is rotatably engaged with the collection net, the scraper is located inside the collection net, and the scraper abuts against the collection net.

[0024] Furthermore, the control panel is also used to record the number of times the third motor is started, and compare the number of starts with the set replacement value. If the number of starts is greater than the replacement value, a filter maintenance reminder instruction is recorded; if the number of starts is less than the replacement value, a normal filter operation instruction is recorded.

[0025] Furthermore, baffles are snapped onto the side walls of the housing near the first filter chamber, the second filter chamber, and the third filter chamber.

[0026] Furthermore, a support block is fixedly connected to the bottom of the shell, a connecting rod is rotatably fitted inside the support block, a pedal is fixedly connected to one end of the connecting rod, and a roller is rotatably fitted on the connecting rod;

[0027] The support block has L-shaped grooves on both sides near the connecting rod, and the connecting rod slides in the grooves.

[0028] The above approach has the following beneficial effects:

[0029] 1. This solution uses multiple filters to ensure the harmless treatment of dust, bacteria, viruses, and other substances in the outside air, thereby guaranteeing the purification effect of the air delivered by the ventilation duct system.

[0030] 2. This solution cleans the metal mesh that comes into contact with the outside air first, reducing the burden on subsequent activated carbon mesh, HEPA mesh, and ultraviolet lamps, extending working time, and thus saving medical costs. The metal mesh, which is easy to clean and can be reused, is replaced cyclically to maintain the air purification effect.

[0031] 3. In this solution, after filtration in the first filter chamber, due to the heavy workload of the metal mesh, some impurities may remain and come into contact with the activated carbon mesh in the second filter chamber. These impurities are then isolated and purified by a collection net, and periodically scraped off by a cleaning mechanism to reduce the amount of impurities entering the subsequent activated carbon mesh, HEPA mesh, and UV lamp, thus ensuring the air purification effect. Attached Figure Description

[0032] Figure 1 This is a cross-sectional view of an embodiment of the medical air purifier of the present invention;

[0033] Figure 2 for Figure 1 A cross-sectional schematic diagram of the connection of the second metal mesh in the middle;

[0034] Figure 3 for Figure 1 A magnified schematic diagram of part A in the middle;

[0035] Figure 4 for Figure 1 A magnified schematic diagram of part B in the middle;

[0036] Figure 5 for Figure 1 A magnified schematic diagram of part C in the middle.

[0037] The reference numerals in the accompanying drawings include: 1. Housing; 11. Air inlet; 12. Ventilation duct system; 13. Support block; 2. First filter chamber; 21. Fan blade; 22. First metal mesh; 23. Second metal mesh; 24. Plastic belt; 25. Clamping block; 26. Mounting rod; 3. Second filter chamber; 31. Activated carbon mesh; 4. Third filter chamber; 41. HEPA mesh; 5. Disinfection chamber; 51. Ultraviolet lamp; 6. Slide groove; 61. Connecting rod; 62. Roller; 7. Support plate; 71. Central shaft; 72. First support rod; 73. Contact plate; 8. Roller; 81. Pull rope; 82. Coil spring; 83. Spring; 9. Collection net; 91. Scraper. Detailed Implementation

[0038] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] The following detailed description illustrates the specific implementation method:

[0042] Example 1:

[0043] As attached Figures 1 to 5The image shows a medical air purifier, comprising a housing 1 with an air inlet 11 on one side. A purification pipe is installed inside the housing 1, with one end connected to the air inlet 11 and the other end connected to a ventilation duct system 12. The ventilation duct system 12 is existing technology and will not be described further in this embodiment. The purification pipe has a first filter chamber 2, a second filter chamber 3, a third filter chamber 4, and a disinfection chamber 5 arranged sequentially along the gas flow direction. A metal mesh is installed in the first filter chamber 2, an activated carbon mesh 31 is installed in the second filter chamber 3, a HEPA filter 41 is installed in the third filter chamber 4, and an ultraviolet lamp 51 is installed in the disinfection chamber 5. Baffles (not shown in the figure) are snapped onto the side walls of the housing 1 near the first filter chamber 2, second filter chamber 3, and third filter chamber 4. The baffles facilitate easy replacement during subsequent disassembly and maintenance, thus simplifying the repair and replacement of the device.

[0044] The first filter chamber 2 is equipped with a fan mechanism for drawing in air, and the two sides of the first filter chamber 2 are equipped with alternating mechanisms for replacing the metal mesh based on changes in the weight of the metal mesh.

[0045] The fan mechanism includes a rectangular support frame that is connected to a purification pipe. A first motor is fixedly connected inside the support frame, and a fan blade 21 is fixedly connected to the output shaft of the first motor. The metal mesh includes a first metal mesh 22 and a second metal mesh 23. The first metal mesh 22 is located at the air inlet end of the fan mechanism, and the second metal mesh 23 is located at the air outlet end of the fan mechanism.

[0046] The fan blade 21 is provided with a lever mechanism around its perimeter. The lever mechanism includes a collection groove located at the bottom of the first metal mesh 22. A receiving plate 7 is slidably fitted in the collection groove. A first support rod 72 is fixedly connected to one side of the receiving plate 7. A central shaft 71 is rotatably fitted at the center of the first support rod 72. The central shaft 71 is fixedly connected to the first metal mesh 22. A contact piece 73 is provided on the side of the first support rod 72 away from the receiving plate 7. When the receiving plate 7 moves to the lowest point, the contact piece 73 is within the rotation range of the fan blade 21. When the receiving plate 7 moves to the highest point, the contact piece 73 separates from the fan blade 21.

[0047] The alternating mechanism includes several rollers 8, which are located above the first filter chamber 2. The rollers 8 are rotatably engaged with the housing 1, and gears mesh between adjacent rollers 8. The gears are rotatably engaged with the housing 1 and are coaxially fixedly connected to the rollers 8. Coil springs 82 are fixedly connected to both ends of the rollers 8. One end of the coil spring 82 is fixedly connected to the roller 8, and the other end of the coil spring 82 is fixedly connected to the housing 1. Several pull ropes 81 are wound on the rollers 8. The end of the pull rope 81 away from the roller 8 is fixedly connected to the top of the second metal mesh 23. The second metal mesh 23 is slidably engaged with the support frame.

[0048] The second metal mesh 23 has mounting rods 26 slidably fitted on both sides. The mounting rods 26 are symmetrically arranged with the second metal mesh 23 as the center. Several plastic strips 24 are fixedly connected between adjacent mounting rods 26. The plastic strips 24 are slidably fitted with the support frame and are located in the air intake direction of the first filter chamber 2.

[0049] An L-shaped clamping block 25 is provided on the side of the second metal mesh 23 away from the plastic strip 24. The center of the clamping block 25 is rotatably engaged with the support frame. The clamping blocks 25 are symmetrically arranged with the second metal mesh 23 as the center. Both sides of the second metal mesh 23 have placement grooves corresponding to the mounting rod 26. The placement grooves correspond to the shape of the clamping blocks 25. A spring 83 is sleeved on the mounting rod 26. One end of the spring 83 is fixedly connected to the side of the mounting rod 26 near the clamping block 25. The other end of the spring abuts against the second metal mesh 23. The spring 83 is located between the clamping block 25 and the plastic strip 24. The spring 83 is used to push the end of the mounting rod 26 away from the plastic strip 24 to abut against the clamping block 25.

[0050] When the second metal mesh 23 is located in the first filter chamber 2, the coil spring 82 is in a coiled state, the end of the clamping block 25 away from the mounting rod 26 is located in the placement groove, the spring 83 is in a naturally extended state, the mounting rod 26 abuts against the clamping block 25, and the end of the clamping block 25 near the mounting rod 26 is in a vertical state; when the weight of the plastic overcomes the elastic force of the spring 83, the spring 83 is in a compressed state, the mounting rod 26 separates from the clamping block 25, the end of the clamping block 25 near the mounting rod 26 rotates toward the side of the second metal mesh 23, and the end of the clamping block 25 away from the mounting rod 26 is located outside the placement groove, the coil spring 82 releases its coiling elastic force and drives the roller 8 to rotate.

[0051] The activated carbon mesh 31 is barrel-shaped, with a funnel-shaped collecting net 9 at its center. The collecting net 9 is equipped with a cleaning mechanism for periodically scraping away accumulated impurities. The outer diameter of the collecting net 9 is the same as the inner diameter of the activated carbon mesh 31. The cleaning mechanism includes a third motor fixedly connected to the collecting net 9, which is electrically connected to a control panel. The control panel activates the third motor when the real-time pressure data exceeds the start-up value. A scraper 91 is fixedly connected to the output end of the third motor. The scraper 91 rotates with the collecting net 9, is located inside the collecting net 9, and abuts against it.

[0052] The specific implementation process is as follows:

[0053] Since the outside air comes into contact with the metal mesh first, the metal mesh bears the greatest burden. Long-term dust accumulation on the metal mesh increases the burden on the subsequent activated carbon mesh 31, HEPA mesh 41, and ultraviolet lamp 51. Therefore, as dust gradually accumulates on the surface of the first metal mesh 22, the blowing action caused by the fan mechanism and the weight of the dust itself causes some of the accumulated dust to fall onto the receiving plate 7 inside the collection tank. As the weight of the receiving plate 7 inside the collection tank gradually increases, it gradually rotates around the central axis 71, raising the height of the contact piece 73 until the contact piece 73 is at its highest point and within the rotation range of the fan blade 21.

[0054] The contact piece 73 is struck or continuously contacted by the edge of the fan blade 21, causing the contact piece 73 to drive the first metal mesh 22 to vibrate via the central shaft 71. When the weight of the receiving plate 7 and the dust is insufficient to drive the contact piece 73 to rotate around the central shaft 71, the contact piece 73 separates from the fan blade 21, allowing the dust accumulated in the first metal mesh 22 to fall off. At the same time, the vibration of the receiving plate 7 causes the accumulated dust on the receiving plate 7 to fall off, ensuring that the first metal mesh 22 performs the first filtration effect on the outside air containing a large amount of dust, thereby reducing the processing load of subsequent filtration mechanisms.

[0055] As the fan blades 21 continuously transport outside air into the interior, the disturbance of the plastic strips 24 during the airflow causes friction between adjacent plastic strips 24, resulting in static electricity. The static electricity generated by the plastic strips 24 attracts dust and other substances in the air, reducing the filtration amount of the second metal mesh 23 and extending its service life per use. At the same time, the increased weight of the dust attached to the plastic strips 24 pulls the mounting rod 26, causing it to overcome the resistance of the spring 83 and move away from the clamping block 25. This causes the mounting rod 26 to release its pushing force on the clamping block 25.

[0056] As the mounting rod 26 ceases to support the clamping block 25, the clamping block 25 moves towards the side closer to the second metal mesh 23, causing it to rotate around the pivot point. This causes the end of the clamping block 25 away from the mounting rod 26 to move out of the placement slot, thus removing the clamping block 25 from restricting and fixing the second metal mesh 23. This releases the elastic force of the coiled spring 82, causing the roller 8 to rotate. The roller 8 winds and stretches, pulling the second metal mesh 23 out of the first filter chamber 2. Simultaneously, as the roller 8 rotates, the gears meshing with it cause the adjacent roller 8 to rotate in the opposite direction, causing the adjacent roller 8 to no longer tension and support the adjacent second metal mesh 23. As a result, the adjacent second metal mesh 23 falls into the first filter chamber 2 due to gravity.

[0057] During the contact between the second metal mesh 23 and the clamping block 25, since the clamping block 25 can rotate, as the second metal mesh 23 falls to the bottom of the first filter chamber 2, the clamping block 25 slides on the surface of the second metal mesh 23 until the clamping block 25 is in the placement groove of the second metal mesh 23. The mounting rod 26 is pushed by the spring 83, causing the mounting rod 26 to push the clamping block 25 to rotate around the rotation point, so that the end of the clamping block 25 away from the mounting rod 26 is kept in the placement groove of the second metal mesh 23. At this time, the coiled spring 83 releases its elastic force and pulls the second metal mesh 23 to maintain the upward movement trend. The clamping action of the clamping block 25 on the second metal mesh 23 is used to maintain the second metal mesh 23 unchanged.

[0058] Meanwhile, during continuous operation, the collection net 9 is used to reduce the contact between dust that may remain in the first filter chamber 2 and the inside of the activated carbon net 31. The control panel controls the third motor to work when the real-time pressure data is greater than the start value, keeping it consistent with the dust accumulation time of the second filter. This causes the output shaft of the third motor to drive the scraper 91 to rotate, so that the scraper 91 cleans the dust filtered on the surface of the collection net 9, thereby reducing the clogging of the collection net 9, maintaining the filtration effect of the collection net 9, reducing the impurity content entering the subsequent activated carbon net 31, HEPA net 41 and ultraviolet lamp 51, and ensuring the air purification effect.

[0059] Example 2:

[0060] The difference from Embodiment 1 is that, in another embodiment, a torsion spring is sleeved at the rotating part of the clamping block 25, and a limiting block is provided on the side of the clamping block 25 away from the second metal mesh 23 to keep the clamping block 25 in a vertical state. The limiting block is fixedly connected to the support frame. The torsion spring is used to keep the clamping block 25 in a normal state, and the clamping block 25 maintains a 30-degree angle along the surface of the limiting block.

[0061] The specific implementation process is as follows: The limiting block is used to restrict the movement direction of the clamping block 25. When the clamping block 25 is no longer pushed and squeezed by the mounting rod 26, the top of the clamping block 25 (i.e. the end of the clamping block 25 near the mounting rod 26) can only rotate around the rotation point and rotate towards the side closer to the second metal mesh 23. This ensures that the bottom of the clamping block 25 (i.e. the end of the clamping block 25 away from the mounting rod 26) rotates away from the second metal mesh 23, so as to release the limiting effect of the clamping block 25 on the second metal mesh 23.

[0062] Meanwhile, thanks to the torsion spring, after the second metal mesh 23 separates from the clamping block 25, the clamping block 25 does not undergo a significant change in rotation angle. This facilitates the subsequent downward movement of the second metal mesh 23 and its contact with the clamping block 25. During this process, the second metal mesh 23 pushes the clamping block 25 between the limiting block and the second metal mesh 23, thus maintaining the limiting effect of the clamping block 25 on the second metal mesh 23.

[0063] Example 3:

[0064] The difference from Embodiment 2 is that a magnet layer is fixedly connected at the connection between the clamping block 25 and the mounting rod 26.

[0065] The specific implementation process is as follows: By setting the magnet layer, during the process of keeping the mounting rod 26 moving away from the clamping block 25, the clamping block 25 is driven to move in the same direction as the mounting rod 26 by the attraction of the magnet layer, thereby keeping the clamping block 25 away from the mounting rod 26 and no longer restricting the second metal mesh 23.

[0066] Example 4:

[0067] The difference from Embodiment 3 is that, in another embodiment, the roller 8 is coaxially fixedly connected to a second motor, the second motor is fixedly connected to the housing 1, and the second motor is electrically connected to a control panel;

[0068] The control panel is electrically connected to a pressure sensor and an electromagnet for adsorbing the mounting rod 26 to move away from the clamping block 25. The electromagnet is located inside the second metal mesh 23 and on the side of the mounting rod 26 away from the clamping block 25. The pressure sensor is located at the bottom of the second metal mesh 23 and is used to measure real-time pressure data when the second metal mesh 23 is in contact with the support frame.

[0069] The control panel is used to compare the real-time pressure data with the set start value. If the real-time pressure data is greater than the start value, a start command is sent to the electromagnet and a delayed start command is sent to the second motor. If the real-time pressure data is less than the start value, a standby command is sent to the electromagnet and the second motor.

[0070] The specific implementation process is as follows: During the continuous filtration process of the second metal mesh 23, due to the retaining effect of the coiling spring 82 on the roller 8, the roller 8 maintains the upward thrust applied to the second metal mesh 23 through the pull rope 81, resulting in a certain gap or incomplete contact between the bottom of the second metal mesh 23 and the support frame. As dust gradually accumulates on the second metal mesh 23, its weight continuously increases, overcoming the tension applied by the coiling spring 82 to the pull rope 81, ensuring that the weight of the second metal mesh 23 is entirely on the support frame, thus enabling the pressure sensor to detect real-time... The pressure data gradually increases; however, the dust adhering to the plastic strip 24 may fall off. Therefore, the real-time pressure data detected by the pressure sensor at the bottom of the second metal mesh 23 is compared with the starting value. When the real-time pressure data is greater than the starting value, the electromagnet is actively controlled to pull the mounting rod 26 to move away from the clamping block 25, so that the clamping block 25 no longer restricts the second metal mesh 23. Thus, the active rotation of the second motor drives the winding roller 8 to wind the pull rope 81, so as to quickly realize the replacement of the second metal mesh 23.

[0071] Example 5:

[0072] The difference from Embodiment 4 is that the control panel is also used to record the number of times the third motor is started, and compare the number of starts with the set replacement value. If the number of starts is greater than the replacement value, a filter maintenance reminder instruction is recorded; if the number of starts is less than the replacement value, a normal filter operation instruction is recorded.

[0073] For example, during the scraping process driven by the output shaft of the third motor, the dust in the collection screen 9 is always not removed. Although the dust content after being processed by the first filter chamber 2 is relatively small, the dust in the collection screen 9 may still become a breeding ground for bacteria after long-term operation, and the third filter chamber 4 may also have dust accumulation problems. Therefore, by sending a filter maintenance reminder command when the number of start-ups exceeds the replacement value, a maintenance reminder based on the weight change of the second filter screen is provided to reduce the filtration burden on the device caused by the increase in dust content due to seasonal changes and ensure the filtration effect.

[0074] Example 6:

[0075] The difference from Embodiment 5 is that a support block 13 is fixedly connected to the bottom of the housing 1, a connecting rod 61 is rotatably connected inside the support block 13, a pedal is fixedly connected to one end of the connecting rod 61, and a roller 62 (not shown in the figure) is rotatably connected on the connecting rod 61.

[0076] The support block 13 has L-shaped grooves 6 on both sides near the connecting rod 61, and the connecting rod 61 slides in the grooves 6.

[0077] The specific implementation process is as follows: The pedal facilitates foot contact with the user, allowing the connecting rod 61 to slide in the slide groove 6 when the roller 62 does not need to contact the ground. This causes the roller 62 to retract into the support block 13, thus supporting the housing 1. When the device needs to be moved, the pedal drives the connecting rod 61 to slide in the slide groove 6, allowing the connecting rod 61 to enter the parallel section of the L-shaped groove and push the roller 62 out of the support block 13 to contact the ground. This allows the device to be adjusted in position by rotating the roller 62, improving the flexibility during handling and movement.

[0078] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A medical air purifier, comprising a housing (1), an air inlet (11) on one side of the housing (1), a purification pipe disposed inside the housing (1), one end of the purification pipe being connected to the air inlet (11), and the other end of the purification pipe being connected to a ventilation duct system (12); characterized in that, The gas flow direction of the purification pipe is provided with a first filter chamber (2), a second filter chamber (3), a third filter chamber (4) and a disinfection chamber (5) in sequence. A metal mesh is installed in the first filter chamber (2), an activated carbon mesh (31) is installed in the second filter chamber (3), a HEPA mesh (41) is installed in the third filter chamber (4), and an ultraviolet lamp (51) is installed in the disinfection chamber (5). The first filter chamber (2) is equipped with a fan mechanism for drawing in air, and the two sides of the first filter chamber (2) are equipped with an alternating mechanism for replacing the metal mesh based on the weight change of the metal mesh. The activated carbon mesh (31) is barrel-shaped, and a funnel-shaped collection net (9) is provided in the center of the activated carbon mesh (31). The collection net (9) is equipped with a cleaning mechanism for periodically scraping off the accumulated impurities on the collection net (9).

2. The medical air purifier according to claim 1, characterized in that, The fan mechanism includes a rectangular support frame, which is connected to the purification pipe. A first motor is fixedly connected inside the support frame, and the output shaft of the first motor is fixedly connected to the fan blade (21). The metal mesh includes a first metal mesh (22) and a second metal mesh (23). The first metal mesh (22) is located at the air inlet end of the fan mechanism, and the second metal mesh (23) is located at the air outlet end of the fan mechanism. The fan blade (21) is provided with a paddle mechanism around its perimeter. The paddle mechanism includes a collection groove located at the bottom of the first metal mesh (22). A receiving plate (7) is slidably fitted inside the collection groove. A first support rod (72) is fixedly connected to one side of the receiving plate (7). A central shaft (71) is rotatably fitted at the center of the first support rod (72). The central shaft (71) is fixedly connected to the first metal mesh (22). A contact piece (73) is provided on the side of the first support rod (72) away from the receiving plate (7). When the receiving plate (7) moves to its lowest point, the contact piece (73) is within the rotation range of the fan blade (21); when the receiving plate (7) moves to its highest point, the contact piece (73) separates from the fan blade (21).

3. The medical air purifier according to claim 2, characterized in that, The alternating mechanism includes several rollers (8), which are located above the first filter chamber (2). The rollers (8) are rotatably engaged with the housing (1), and gears mesh between adjacent rollers (8). The gears are rotatably engaged with the housing (1), and the gears are coaxially fixedly connected to the rollers (8). Coil springs (82) are fixedly connected to both ends of the rollers (8). One end of the coil spring (82) is fixedly connected to the roller (8), and the other end of the coil spring (82) is fixedly connected to the housing (1). Several pull ropes (81) are wound on the roller (8). The end of the pull rope (81) away from the roller (8) is fixedly connected to the top of the second metal mesh (23). The second metal mesh (23) slides with the support frame. The second metal mesh (23) has mounting rods (26) slidably fitted on both sides. The mounting rods (26) are symmetrically arranged with the second metal mesh (23) as the center. Several plastic strips (24) are fixedly connected between adjacent mounting rods (26). The plastic strips (24) are slidably fitted with the support frame. The plastic strips (24) are located in the air intake direction of the first filter chamber (2). The second metal mesh (23) has an L-shaped clamping block (25) on the side away from the plastic strip (24). The center of the clamping block (25) is rotatably engaged with the support frame. The clamping blocks (25) are symmetrically arranged with the second metal mesh (23) as the center. Both sides of the second metal mesh (23) have placement slots corresponding to the mounting rod (26). The placement slots correspond to the shape of the clamping blocks (25). A spring (83) is fitted on the mounting rod (26). The spring (83) is located between the clamping block (25) and the plastic strip (24). The spring (83) is used to push the end of the mounting rod (26) away from the plastic strip (24) to abut against the clamping block (25). When the second metal mesh (23) is located in the first filter chamber (2), the coil spring (82) is in a coiled state, the end of the clamping block (25) away from the mounting rod (26) is located in the placement groove, the spring (83) is in a naturally extended state, the mounting rod (26) abuts against the clamping block (25), and the end of the clamping block (25) near the mounting rod (26) is in a vertical state; when the weight of the plastic overcomes the elastic force of the spring (83), the spring (83) is in a compressed state, the mounting rod (26) separates from the clamping block (25), the end of the clamping block (25) near the mounting rod (26) rotates to one side of the second metal mesh (23), and the end of the clamping block (25) away from the mounting rod (26) is located outside the placement groove, the coil spring (82) releases the coiling elastic force and drives the roller (8) to rotate.

4. The medical air purifier according to claim 3, characterized in that, A torsion spring is fitted at the rotating part of the clamping block (25). A limiting block is provided on the side of the clamping block (25) away from the second metal mesh (23) to keep the clamping block (25) in a vertical position. The limiting block is fixedly connected to the support frame. The torsion spring is used to keep the clamping block (25) at a 30-degree angle along the surface of the limiting block under normal conditions.

5. The medical air purifier according to claim 4, characterized in that, Magnet layers are fixedly connected at the connection between the clamping block (25) and the mounting rod (26).

6. The medical air purifier according to claim 5, characterized in that, The roller (8) is coaxially fixedly connected to a second motor, which is fixedly connected to the housing (1). The second motor is electrically connected to a control panel. The control panel is electrically connected to a pressure sensor and an electromagnet for adsorbing the mounting rod (26) to move away from the clamping block (25). The electromagnet is located inside the second metal mesh (23) and on the side of the mounting rod (26) away from the clamping block (25). The pressure sensor is located at the bottom of the second metal mesh (23) and is used to measure real-time pressure data when the second metal mesh (23) contacts the support frame. The control panel is used to compare the real-time pressure data with the set start value. If the real-time pressure data is greater than the start value, a start command is sent to the electromagnet and a delayed start command is sent to the second motor. If the real-time pressure data is less than the start value, a standby command is sent to the electromagnet and the second motor.

7. The medical air purifier according to claim 6, characterized in that, The outer diameter of the collection net (9) is the same as the inner diameter of the activated carbon net (31); the cleaning mechanism includes a third motor fixedly connected to the collection net (9), the third motor is electrically connected to the control panel, and the control panel starts the third motor when the real-time pressure data is greater than the starting value; a scraper (91) is fixedly connected to the output end of the third motor, the scraper (91) rotates with the collection net (9), the scraper (91) is located inside the collection net (9), and the scraper (91) abuts against the collection net (9).

8. The medical air purifier according to claim 7, characterized in that, The control panel is also used to record the number of times the third motor is started, and compare the number of starts with the set replacement value. If the number of starts is greater than the replacement value, a filter maintenance reminder command is recorded; if the number of starts is less than the replacement value, a normal filter operation command is recorded.

9. The medical air purifier according to claim 8, characterized in that, The side walls of the housing (1) near the first filter chamber (2), the second filter chamber (3) and the third filter chamber (4) are all fitted with baffles.

10. The medical air purifier according to claim 9, characterized in that, A support block (13) is fixedly connected to the bottom of the housing (1). A connecting rod (61) is rotatably fitted inside the support block (13). A pedal is fixedly connected to one end of the connecting rod (61). A roller (62) is rotatably fitted on the connecting rod (61). The support block (13) has L-shaped grooves (6) on both sides near the connecting rod (61), and the connecting rod (61) slides in the grooves (6).

Images