Air filter device for medical oxygen concentrator

Abstract

The invention discloses an air filter device for a medical oxygen concentrator, and relates to the technical field of air filtration. The device comprises a shell, wherein a motor is fixedly installed inside the shell, a turntable is rotatably connected inside the shell, a fiber filter element is fixedly laid on the turntable, and a dehumidification mechanism is also included. The dehumidification mechanism comprises a cover body fixed to the bottom of the shell and an inner connecting rod fixed to the motor driving shaft, an outer connecting rod is sleeved on the outer side of the inner connecting rod, a water baffle is fixedly connected to the inside of the cover body, blades are arranged inside the cover body, and a blade plate is fixedly connected to the top surface of the blade, and the blade plate rotates to throw out liquid droplets and large particle impurities in the air through centrifugal force, so as to separate the liquid droplets from the air, and avoid the fiber filter element from being soaked when filtering humid air, resulting in a reduction in filtering efficiency, and the synchronous rotation of the impeller can generate a downward airflow, and the separated liquid droplets are isolated by the airflow, so as to achieve an anti-bacteria and anti-odor effect, so that the oxygen generated by the oxygen concentrator can be safely and comfortably inhaled by the patient.

Description

Technical Field

[0001] The invention relates to the technical field of air filtration, and in particular to an air filtration device for a medical oxygen concentrator. Background Art

[0002] Medical oxygen generators usually use pressure swing adsorption technology, using the difference in the adsorption capacity of molecular sieves for nitrogen and oxygen in the air to achieve oxygen separation and enrichment. When pressurized, the molecular sieve adsorbs nitrogen, allowing oxygen to pass through and be collected. When depressurized, the molecular sieve releases nitrogen, thereby achieving cyclic oxygen production.

[0003] The oxygen concentrator will inhale external air during operation. If impurities in the air enter the oxygen concentrator directly, they will flow into key components such as the compressor and molecular sieve, causing wear on the compressor's piston, cylinder and other moving parts and leading to blockage of the molecular sieve's micropores, thereby reducing the oxygen production effect and service life of the oxygen concentrator. Therefore, when the oxygen concentrator is running, it is necessary to remove impurities in the air through an air filter.

[0004] At present, the air filter device on the oxygen concentrator is mainly composed of an outer shell and a fiber filter element. Through the interweaving of fibers and the microporous structure, it can effectively intercept particulate matter in the air and achieve air filtration. However, in a humid environment, due to the high humidity of the air, when the fiber filter element filters humid air, the moisture will cause the fibers to swell, deform or agglomerate, resulting in smaller or uneven gaps between the fibers, thereby increasing the resistance to air passage, slowing down the filtration speed and affecting the filtration efficiency. In addition, the damp fiber filter element is prone to produce bacteria. After the bacteria enter the oxygen concentrator, they will be inhaled into the human body along with the oxygen, endangering the health of the patient. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that when a fiber filter element filters humid air, moisture will cause the fibers to swell, deform or agglomerate, resulting in smaller or uneven gaps between the fibers, slowing down the filtration speed, and the humid fiber filter element is prone to bacteria. An air filter device for a medical oxygen concentrator is proposed to solve the problem that when a fiber filter element filters humid air, moisture will cause the fibers to swell, deform or agglomerate, resulting in smaller or uneven gaps between the fibers, slowing down the filtration speed, and the humid fiber filter element is prone to bacteria.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technology: an air filter device for a medical oxygen concentrator, comprising a housing, a motor is fixedly installed inside the housing, a turntable is rotatably connected inside the housing, a fiber filter element is fixedly laid on the turntable, and further comprising:

[0007] A dehumidification mechanism, the dehumidification mechanism comprising a cover body fixed to the bottom of the housing and an inner connecting rod fixed to the motor drive shaft, the outer connecting rod being sleeved on the outer side of the inner connecting rod, a water baffle being fixedly connected to the inside of the cover body, blades being arranged inside the cover body, a leaf plate being fixedly connected to the top surface of the blade, and a bacteria isolation component being arranged inside the cover body;

[0008] An adjusting mechanism, the adjusting mechanism comprising a gear fixed to the end of the blade, one side of the gear being meshedly connected with a rack;

[0009] and a displacement assembly for switching the state of the blades by the direction of rotation;

[0010] When the blades rotate forward, they are in a dehumidifying state, separating liquid droplets in the air by centrifugal force; when the blades rotate reversely, they are in a backwashing state, cleaning impurities on the fiber filter element by generating negative pressure.

[0011] As a further description of the above technology, an air filter device for a medical oxygen concentrator is provided: the outside of the external connecting rod is fixedly connected to a mounting cylinder which is rotatably connected to the gear and slidably connected to the rack; the bacteria isolation assembly includes an air hood fixed to the bottom of the mounting cylinder; the inner wall of the air hood is fixedly connected to an impeller; the inner wall of the hood is fixedly connected to a wind shield; and the impeller generates a downward airflow when it rotates forward.

[0012] As a further description of the above technology, an air filter device for a medical oxygen concentrator is provided: the top of the windshield is fixedly connected to a support frame, the interior of the mounting tube is slidably connected to a pressure plate in contact with the top of the rack, and a spring is provided on the top of the pressure plate.

[0013] As a further description of the above technology, an air filter device for a medical oxygen concentrator is provided: the displacement assembly includes a sleeve fixed to the bottom of the mounting cylinder, a guide column is fixedly connected to the inside of the cover body, a bump is fixedly connected to the inner wall of the sleeve, an iron ring is fixedly connected to the inside of the sleeve, a magnet is fixedly connected to the inside of the guide column, and the magnet generates magnetic attraction on the iron ring.

[0014] As a further description of the above technology, an air filter device for a medical oxygen concentrator also includes an airflow control mechanism, which includes an inner partition fixed between an outer connecting rod and a mounting cylinder, an airflow channel is formed between the outer connecting rod and the inner partition, and a first one-way valve connected to the airflow channel is installed on the top of the inner partition.

[0015] As a further description of the above technology, an air filtering device for a medical oxygen concentrator is provided: a second one-way valve connected to the airflow channel is installed on one side of the mounting cylinder, a ring-shaped part is rotatably connected to the top of the cover body, an annular air cavity is formed between the ring-shaped part and the mounting cylinder, an exhaust pipe connected to the annular air cavity is fixedly connected to one side of the ring-shaped part, filter screens are provided on the top of the cover body and inside the first one-way valve and the second one-way valve, and a two-way switching valve is fixedly installed on the top of the outer shell.

[0016] As a further description of the above technology, an air filter device for a medical oxygen concentrator is provided: the top of the annular member and the top of the mounting cylinder are respectively fixedly and slidably connected with a bayonet.

[0017] As a further description of the above technology, an air filter device for a medical oxygen concentrator is provided: an arc-shaped plate in contact with the filter is fixedly connected to the side of the annular member close to the exhaust pipe.

[0018] As a further description of the above technology, an air filter device for a medical oxygen concentrator also includes an air-blocking unit, and the air-blocking unit includes a guide plate slidably connected to the inside of the cover body.

[0019] As a further description of the above technology, an air filter device for a medical oxygen concentrator is provided: a support rod is fixedly connected to the bottom of the guide plate, and a knob is threadedly connected to the bottom of the cover body.

[0020] In summary, due to the use of the above-mentioned technology, the air filter device for medical oxygen concentrator has the following beneficial effects:

[0021] In the present application, when the blades rotate positively, they drive the blade plates to rotate, causing the surrounding humid air to move in a circular motion, and the liquid droplets and large particles of impurities in the air are thrown out by centrifugal force, which not only achieves the separation of liquid droplets from air, and prevents the fiber filter element from being soaked when filtering humid air, resulting in reduced filtration efficiency, but also prevents large particles of impurities from contacting the fiber filter element, so that the fiber filter element can fully play the effect of filtering tiny impurities, delaying the cleaning time of the fiber filter element, and can also keep the fiber filter element dry to prevent bacteria from growing, so that the oxygen generated by the oxygen generator is purer and more hygienic, ensuring the health of patients. In addition, the synchronous rotation of the impeller can generate a downward airflow, which isolates the separated liquid droplets through the airflow, and prevents the separated liquid droplets from being sucked into the oxygen generator again after evaporation, thereby reducing the burden on the dehumidification mechanism;

[0022] It is worth mentioning that the separated droplets and large particles of impurities will mix and gather inside the hood, causing bacteria to grow and produce odors. The airflow generated by the impeller can also isolate bacteria and odors from the air inhaled by the oxygen concentrator, playing an anti-bacteria and anti-odor effect, so that the oxygen generated by the oxygen concentrator can be safely and comfortably inhaled by the patient. In addition, the airflow can also push the droplets on the windshield, accelerate the droplet fall, and reduce the evaporation of the droplets;

[0023] When the blades rotate in reverse, they will deflect, causing the air to pass through the fiber filter element in the reverse direction, flushing the impurities blocked inside the fiber filter element, and realizing automatic cleaning of the fiber filter element, thereby reducing the frequency of disassembly, cleaning and replacement of the fiber filter element, which is conducive to the long-term use of the oxygen generator. The present application realizes the dehumidification and backwashing effects at the same time through the state switching of the blades, thereby improving the utilization rate of the structure. There is no need to set up independent complex structures for dehumidification and backwashing, making the entire filter device structure more compact, reducing the size of the device, and facilitating combined installation with the oxygen generator;

[0024] The blades can move upward when switching from reverse rotation to forward rotation, which reduces the distance between the blades and the water baffle during forward rotation dehumidification, so that the humid air can be fully driven by the rotation of the blades when passing between the water baffle and the blades, improving the effect of separating droplets in the humid air by centrifugal force;

[0025] During the backwashing process, impurities flushed down from the fiber filter element will clog the filter screen, causing the air flow rate to decrease, thereby reducing the backwashing effect. The present application can clean the impurities accumulated on the filter screen through the arc plate to ensure the air permeability of the filter screen, and the filter screen can use the airflow generated by the reverse rotation of the impeller to dredge the filter holes from bottom to top, further enhancing its own air permeability to improve the backwashing effect of the fiber filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It shows an overall top schematic diagram provided according to an embodiment of the present invention;

[0027] Figure 2 It shows an overall bottom schematic diagram provided according to an embodiment of the present invention;

[0028] Figure 3 An overall exploded view according to an embodiment of the present invention is shown;

[0029] Figure 4 A three-dimensional schematic diagram of a cover body provided in an embodiment of the present invention is shown;

[0030] Figure 5 A schematic cross-sectional view of a cover body provided in an embodiment of the present invention is shown;

[0031] Figure 6 A schematic cross-sectional view of a mounting cylinder provided according to an embodiment of the present invention is shown;

[0032] Figure 7 A schematic cross-sectional view of a sleeve provided in an embodiment of the present invention is shown;

[0033] Figure 8 A schematic diagram of air flow direction in a dehumidification state provided by an embodiment of the present invention is shown;

[0034] Fig. 9 A schematic diagram of the airflow direction in a backwashing state provided in an embodiment of the present invention is shown;

[0035] Fig.10 The embodiment provided according to the present invention shows Fig. 9 Enlarged view of point A in the middle;

[0036] Fig.11 A schematic diagram of an exhaust pipe provided according to an embodiment of the present invention is shown.

[0037] Legend:

[0038] 10. Housing; 11. Motor; 12. Turntable; 13. Fiber filter element;

[0039] 20. Dehumidification mechanism; 21. Cover body; 22. Inner connecting rod; 23. Outer connecting rod; 24. Mounting tube; 25. Water baffle; 26. Blade; 27. Blade; 28. Bacteria isolation assembly; 281. Air cover; 282. Impeller; 283. Wind baffle;

[0040] 30. Adjustment mechanism; 31. Support frame; 32. Rack; 33. Spring; 34. Press plate; 35. Gear;

[0041] 40. displacement assembly; 41. sleeve; 42. iron ring; 43. bump; 44. guide column; 45. magnet;

[0042] 50. air-blocking unit; 51. guide plate; 52. support rod; 53. knob;

[0043] 60. Airflow control mechanism; 61. Inner partition; 62. Filter; 63. First one-way valve; 64. Second one-way valve; 65. Ring member; 66. Exhaust pipe; 67. Arc plate; 68. Two-way switching valve; 69. Pin. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technology in the embodiments of the present invention, an air filter device for a medical oxygen concentrator. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] like Figure 1-Figure 11 As shown, the present invention provides an air filter device for a medical oxygen concentrator: comprising a housing 10, the housing 10 is composed of two parts of a cylinder connected by threads, which is convenient for installing and removing a fiber filter element 13, a motor 11 is fixedly installed inside the housing 10, a turntable 12 is rotatably connected inside the housing 10, and a fiber filter element 13 is fixedly laid on the turntable 12, and also includes:

[0046] The dehumidification mechanism 20 includes a cover body 21 fixed to the bottom of the housing 10 and an inner connecting rod 22 fixed to the driving shaft of the motor 11. The inner connecting rod 22 penetrates the turntable 12. The motor 11 drives the inner connecting rod 22 to rotate and can also drive the turntable 12 and the fiber filter element 13 to rotate together, switching the position of the fiber filter element 13 so that the fiber filter element 13 can evenly exert the filtering effect and avoid local blockage. In addition, the fiber filter element 13 can be evenly cleaned during backwashing. The outer part of the cover body 21 is provided with a There are downwardly inclined air inlet holes and discharge holes, and the separated liquid droplets will not leak out from the air inlet holes when sliding down the inner wall of the cover body 21. The outer connecting rod 23 is sleeved on the outer side of the inner connecting rod 22, and the inner connecting rod 22 is slidably connected to the outer connecting rod 23. A water baffle 25 is fixedly connected to the inside of the cover body 21. A plurality of blades 26 are arranged in a circular array around the mounting tube 24. A blade plate 27 is fixedly connected to the top surface of the blade 26. A bacteria isolation component 28 is arranged inside the cover body 21.

[0047] The adjusting mechanism 30 includes a gear 35 fixed to the end of the blade 26, and one side of each gear 35 is meshed with a rack 32. The rack 32 can move vertically to drive the gear 35 to rotate and cause the blade 26 to deflect;

[0048] and a displacement assembly 40 for switching the state of the blade 26 by the rotation direction;

[0049] When the blades 26 rotate forward, they are in a dehumidifying state, separating droplets in the air by centrifugal force. When the blades 26 rotate backward, they are in a backwashing state, cleaning impurities on the fiber filter element 13 by generating negative pressure.

[0050] Reference Figure 5-Figure 8 The outside of the outer connecting rod 23 is fixedly connected with a mounting cylinder 24 that is rotatably connected to the gear 35 and slidably connected to the rack 32. The bacteria isolation component 28 includes an air hood 281 fixed to the bottom of the mounting cylinder 24. The inner wall of the air hood 281 is fixedly connected with an impeller 282. The rotation of the outer connecting rod 23 drives the mounting cylinder 24 to rotate, so that the air hood 281 and the impeller 282 rotate together. The inner wall of the cover body 21 is fixedly connected with a wind shield 283, which is used to guide the separated droplets while blocking the wind. When the impeller 282 rotates forward, a downward airflow is generated. At this time, the blades 26 are in a forward rotation dehumidification state. The shell 10 is connected to the oxygen generator inlet pipe. The suction force generated by the oxygen generator draws the outside air into the shell 10. The impeller 282 rotates to discharge part of the air that is sucked into the shell 10 and is not filtered by the fiber filter element 13 from the discharge hole, and the part of the airflow is used to isolate the dirty water accumulated at the bottom of the cover body 21.

[0051] Reference Figure 5 and Figure 6The top of the wind shield 283 is fixedly connected to a support frame 31, and a ball is arranged inside the support frame 31. After the rack 32 is supported by the support frame 31, the ball can reduce the resistance encountered by the rack 32 when it rotates. The inside of the mounting cylinder 24 is slidably connected to a pressure plate 34 in contact with the top of the rack 32. A spring 33 is provided on the top of the pressure plate 34. The spring 33 applies downward pressure to all racks 32 through the pressure plate 34. When the mounting cylinder 24 moves upward, the rack 32 is reset under the action of pressure. Each time the blade 26 switches state, the moving distance of the rack 32 is the same.

[0052] Reference Figure 5 and Figure 7 The displacement assembly 40 includes a sleeve 41 fixed to the bottom of the mounting cylinder 24, a guide column 44 is fixedly connected inside the cover body 21, two annular grooves and an inclined groove connecting the two annular grooves are provided on the guide column 44, a protrusion 43 embedded in the annular groove is fixedly connected to the inner wall of the sleeve 41, an iron ring 42 is fixedly connected inside the sleeve 41, a magnet 45 is fixedly connected inside the guide column 44, and the magnet 45 generates a magnetic attraction force on the iron ring 42. When the sleeve 41 rotates forward, that is, clockwise, the protrusion 43 slides in the annular groove, and when passing through the connection between the annular groove and the inclined groove, the protrusion 43 can be guided by the downward inner wall of the inclined groove so that the protrusion 43 will not slide along the inclined groove. At this time, the mounting cylinder 24 drives the blades 26 and the blades 27 to rotate continuously for dehumidification. When the sleeve 41 rotates reversely, when the protrusion 43 passes through the connection between the annular groove and the inclined groove, the upward inner wall of the inclined groove causes the protrusion 43 to separate from the annular groove. The sleeve 41 continues to rotate so that the protrusion 43 enters the lower annular groove under the guidance of the inclined groove. During this process, the sleeve 41 moves downward while rotating, driving the iron ring 42, the mounting cylinder 24 and the rack 32 to move downward. When the rack 32 moves upward relative to the mounting cylinder 24 under the support of the support frame 31, it drives the gear 35 and the blade 26 to deflect, thereby realizing the state switching of the blade 26. After the blade 26 is deflected, the reverse rotation causes the air to pass through the fiber filter element 13 in the opposite direction, and the impurities blocked at the bottom of the fiber filter element 13 are flushed, so as to realize the automatic cleaning of the fiber filter element 13, thereby reducing the frequency of disassembly, cleaning and replacement of the fiber filter element 13. After the iron ring 42 moves downward, it is located below the magnet 45. The iron ring 42 is subjected to the upward magnetic attraction of the magnet 45. Therefore, through the above principle, when the sleeve 41 switches back to the forward rotation again, the protrusion 43 can move upward through the inclined groove, thereby realizing the repeated switching of the two states of the blade 26.

[0053] Reference Figure 5, and also includes an airflow control mechanism 60, which includes an inner partition 61 fixed between the outer connecting rod 23 and the mounting tube 24, an airflow channel is formed between the outer connecting rod 23 and the inner partition 61, and a first one-way valve 63 connected to the airflow channel is installed on the top of the inner partition 61. When the impeller 282 rotates forward, a downward airflow is generated, and the air inside the shell 10 can pass through the first one-way valve 63 and the airflow channel and be blown out from the air hood 281. The airflow isolates bacteria and odors from the air inhaled by the oxygen concentrator, thereby achieving an anti-bacteria and anti-odor effect, so that the oxygen generated by the oxygen concentrator can be safely and comfortably inhaled by the patient, and the droplets on the wind shield 283 are accelerated to fall, so as to prevent the separated droplets from evaporating and being inhaled by the oxygen concentrator again.

[0054] Reference Figure 4 , Figure 6 and Fig.10 A second one-way valve 64 communicating with the air flow channel is installed on one side of the mounting cylinder 24, a ring member 65 is rotatably connected to the top of the cover body 21, an annular air cavity is formed between the ring member 65 and the mounting cylinder 24, and an exhaust pipe 66 communicating with the annular air cavity is fixedly connected to one side of the annular member 65. A filter screen 62 is provided on the top of the cover body 21 and inside the first one-way valve 63 and the second one-way valve 64. When the impeller 282 rotates in reverse, an upward air flow is generated, and the air flow passes through the second one-way valve 64 and the annular air cavity and then is discharged from the exhaust pipe 66. Air is blown out from the air pipe 66 to clear the filter screen 62 from bottom to top, thereby improving the air permeability of the filter screen 62 to ensure the backwashing effect of the fiber filter element 13. A two-way switching valve 68 is fixedly installed on the top of the outer shell 10. The two-way switching valve 68 is connected to the outer shell 10, and one of the delivery pipes is connected to the oxygen generator air inlet pipe. When backwashing is performed, the other delivery pipe is connected to the gas tank, and the fiber filter element 13 is backwashed by clean airflow. The two delivery pipes of the two-way switching valve 68 cannot be opened or closed at the same time.

[0055] Reference Figure 4 , Figure 5 and Fig.11The top of the annular member 65 and the top of the mounting cylinder 24 are respectively fixedly and slidably connected with a bayonet pin 69. When the mounting cylinder 24 moves downward, the annular member 65 can be pushed to rotate by the two groups of bayonet pins 69, so that the exhaust pipe 66 rotates to achieve dredging of various positions on the filter screen 62. In order to avoid the two groups of bayonet pins 69 being aligned and unable to fit together when the mounting cylinder 24 moves downward, one group of bayonet pins 69 is slidably connected to the mounting cylinder 24 and can slide upward when the two groups of bayonet pins 69 are aligned, providing fault tolerance for the fitting of the two groups of bayonet pins 69. An arc plate 67 in contact with the filter screen 62 is fixedly connected to one side of the annular member 65 close to the exhaust pipe 66. When the arc plate 67 rotates with the annular member 65, after the exhaust pipe 66 jets air to clear the filter screen 62, the arc plate 67 can push away the blown impurities immediately thereafter to prevent the impurities from being sucked into the filter holes of the filter screen 62 again. The arc plate 67 can also guide the impurities so that the impurities are pushed between the cover body 21 and the outer shell 10, so that some of the impurities will not be lifted up again by the airflow to block the filter screen 62 or the fiber filter element 13.

[0056] Reference Figure 5 , and also includes an air-sealing unit 50, which includes a guide plate 51 slidably connected to the inside of the cover body 21, the guide plate 51 blocks the opening of the wind shield 283, which is helpful for airflow isolation, and under the guidance of the guide plate 51, liquid is prevented from directly sliding off the wind shield 283 to cause splashing of liquid droplets inside the cover body 21, and prevents droplets containing impurities from entering the air cover 281. The bottom of the guide plate 51 is fixedly connected to a support rod 52, and the bottom of the cover body 21 is threadedly connected to a knob 53. By twisting the knob 53, the support rod 52 and the guide plate 51 can be driven to move upward, and the opening of the wind shield 283 can be closed to prevent the air containing bacteria at the bottom of the wind shield 283 from being transported to the outer casing 10 by the impeller 282 during backwashing.

[0057] Working principle: One of the delivery pipes of the two-way switching valve 68 is connected to the air inlet pipe of the oxygen concentrator, and the other delivery pipe is closed, and the suction force generated by the oxygen concentrator allows the outside air to enter the inside of the cover body 21 through the air inlet hole of the cover body 21;

[0058] The control motor 11 drives the shaft to rotate clockwise to drive the inner connecting rod 22 and the outer connecting rod 23 to rotate, thereby driving the mounting tube 24, the air cover 281, the impeller 282, the blades 26 and the blades 27 to rotate. The rotation of the blades 27 makes the surrounding air move in a circular motion. The droplets in the air are thrown out to the inner wall of the cover body 21 and the water baffle 25 under the action of centrifugal force, thereby reducing the air humidity. Generally, the inhalation pressure of a medical oxygen concentrator is between 200Pa and 600Pa. The inhalation pressure generated when the impeller 282 rotates is positively correlated with the rotation speed. When the reverse suction pressure generated by the impeller 282 in the channel is greater than the suction pressure of the oxygen generator, a part of the air sucked by the oxygen generator at the top of the airflow channel will break through the boundary layer and be diverted under the action of turbulence, so that the impeller 282 rotates to blow a part of the dehumidified air downward through the first one-way valve 63, the airflow channel and the air hood 281, so that the airflow enters from the opening of the wind shield 283, and the airflow discharges the bacteria and odor between the wind shield 283 and the cover body 21 from the discharge hole of the cover body 21;

[0059] When the fiber filter element 13 needs to be cleaned, the delivery pipe of the two-way switching valve 68 that is not connected to the oxygen generator is connected to the gas tank containing the flushing agent, and the delivery pipe is opened, and the delivery pipe connected to the oxygen generator is closed, and then the knob 53 is turned to drive the support rod 52 and the guide plate 51 to move up to close the opening of the windshield 283, and then the drive shaft of the motor 11 is controlled to rotate counterclockwise, driving the external connecting rod 23, the mounting cylinder 24, the sleeve 41 and the impeller 282 to rotate counterclockwise. At this time, the magnet 45 applies a downward suction force to the iron ring 42 and the sleeve 41, and the sleeve 4 When the protrusion 43 passes through the connection between the annular groove and the inclined groove by the reverse rotation, the upward inner wall of the inclined groove causes the protrusion 43 to leave the annular groove and enter the inclined groove. The sleeve 41 continues to rotate until the protrusion 43 enters the lower annular groove under the guidance of the inclined groove. During this process, the sleeve 41 moves downward while rotating, driving the iron ring 42, the mounting cylinder 24, the rack 32, the second one-way valve 64 and the bayonet 69 to move downward. The second one-way valve 64 moves downward to communicate with the annular air cavity, and the bayonet 69 engages with the bayonet 69 on the annular member 65. When the rack 32 is supported by the support frame 31, the second one-way valve 64 moves downward to communicate with the annular air cavity. The bayonet 69 engages with the bayonet 69 on the annular member 65. When the installation cylinder 24 moves upward, the rack 32 drives the gear 35 to rotate and deflect the blade 26, so that the blade 26 rotating in the opposite direction with the installation cylinder 24 conveys the air downward. At this time, the flushing agent in the gas tank is sucked out and passes through the fiber filter element 13 from top to bottom, and the impurities blocked at the bottom of the fiber filter element 13 are flushed to clean the fiber filter element 13, thereby reducing the frequency of disassembly, cleaning and replacement of the fiber filter element 13. The flushed impurities will fall onto the filter screen 62. At this time, the impeller 282 reverses and inhales air from the exhaust hole of the cover body 21, and the air passes through the impeller 282. The air is blown upward from the bottom of the filter screen 62 through the air cover 281, the air flow channel, the second one-way valve 64, the annular member 65 and the exhaust pipe 66 to clear the filter screen 62, and the mounting cylinder 24 rotates through the bayonet 69 to drive the annular member 65, the exhaust pipe 66 and the arc plate 67 to rotate. After the exhaust pipe 66 clears the filter screen 62 with air, the arc plate 67 can push the blown impurities away immediately thereafter to prevent the impurities from being sucked into the filter holes of the filter screen 62 again. The arc plate 67 can also guide the impurities so that the impurities are pushed between the cover body 21 and the housing 10.

[0060] At this time, the wind force generated by the rotation of the blades 26 will carry the airflow blown out from the exhaust pipe 66 and be discharged from the air inlet of the cover body 21, so that the airflow blown out from the exhaust pipe 66 will not contact the fiber filter element 13, thereby preventing the fiber filter element 13 from being contaminated;

[0061] After moving downward, the iron ring 42 is located below the magnet 45. At this time, the iron ring 42 is attracted by the upward magnetic force of the magnet 45. When the sleeve 41 switches back to normal rotation again, the protrusion 43 can move upward through the inclined groove, thereby driving each component to reset, thereby realizing repeated switching of the two states of the blade 26.

[0062] The above description is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacement or changes to the air filter device for a medical oxygen generator and the inventive concept according to the technology of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An air filter device for a medical oxygen concentrator, comprising a housing (10), a motor (11) fixedly mounted inside the housing (10), a turntable (12) rotatably connected inside the housing (10), a fiber filter element (13) fixedly laid on the turntable (12), characterized in that: Also includes: A dehumidification mechanism (20), the dehumidification mechanism (20) comprising a cover body (21) fixed to the bottom of the housing (10) and an inner connecting rod (22) fixed to the driving shaft of the motor (11), the outer portion of the inner connecting rod (22) being sleeved with an outer connecting rod (23), the outer portion of the outer connecting rod (23) being fixedly connected to a mounting cylinder (24) rotatably connected to a gear (35) and slidably connected to a rack (32), the interior of the cover body (21) being fixedly connected to a water baffle (25), the interior of the cover body (21) being provided with blades (26), the top surface of the blades (26) being fixedly connected to a leaf plate (27), and the interior of the cover body (21) being provided with a bacteria isolation assembly (28); An adjusting mechanism (30), the adjusting mechanism (30) comprising a gear (35) fixed to an end of the blade (26), one side of the gear (35) being meshingly connected to a rack (32); An airflow control mechanism (60), wherein a two-way switching valve (68) is fixedly mounted on the top of the housing (10); and a displacement assembly (40) for switching the state of the blade (26) by rotating the direction; The displacement assembly (40) comprises a sleeve (41) fixed to the bottom of the mounting cylinder (24); a guide column (44) is fixedly connected to the interior of the cover body (21); a protrusion (43) is fixedly connected to the inner wall of the sleeve (41); an iron ring (42) is fixedly connected to the interior of the sleeve (41); a magnet (45) is fixedly connected to the interior of the guide column (44); and the magnet (45) generates a magnetic attraction force on the iron ring (42); When the blades (26) rotate forward, they are in a dehumidifying state, separating liquid droplets in the air by centrifugal force; and when the blades (26) rotate backward, they are in a backwashing state, cleaning impurities on the fiber filter element (13) by generating negative pressure.

2. An air filter device for a medical oxygen concentrator according to claim 1, characterized in that: The bacteria isolation component (28) comprises an air hood (281) fixed to the bottom of the mounting cylinder (24); an impeller (282) is fixedly connected to the inner wall of the air hood (281); a windshield (283) is fixedly connected to the inner wall of the hood body (21); and the impeller (282) generates a downward airflow when rotating forward.

3. An air filter device for a medical oxygen concentrator according to claim 2, characterized in that: The top of the windshield plate (283) is fixedly connected to a support frame (31), the interior of the mounting cylinder (24) is slidably connected to a pressure plate (34) in contact with the top of the rack (32), and a spring (33) is provided on the top of the pressure plate (34).

4. The air filter device for a medical oxygen concentrator according to claim 2, characterized in that: The airflow control mechanism (60) comprises an inner partition (61) fixed between the outer connecting rod (23) and the mounting tube (24), an airflow channel is formed between the outer connecting rod (23) and the inner partition (61), and a first one-way valve (63) in communication with the airflow channel is installed on the top of the inner partition (61).

5. The air filter device for medical oxygen concentrator according to claim 4, characterized in that: A second one-way valve (64) in communication with the air flow channel is installed on one side of the installation cylinder (24); a ring-shaped member (65) is rotatably connected to the top of the cover body (21); an annular air cavity is formed between the annular member (65) and the installation cylinder (24); an exhaust pipe (66) in communication with the annular air cavity is fixedly connected to one side of the annular member (65); and a filter screen (62) is provided on the top of the cover body (21) and inside the first one-way valve (63) and the second one-way valve (64).

6. The air filter device for medical oxygen concentrator according to claim 5, characterized in that: The top of the annular member (65) and the top of the mounting cylinder (24) are respectively fixedly and slidably connected with a bayonet pin (69).

7. The air filter device for medical oxygen concentrator according to claim 5, characterized in that: A curved plate (67) in contact with the filter screen (62) is fixedly connected to one side of the annular member (65) close to the exhaust pipe (66).

8. The air filter device for a medical oxygen concentrator according to claim 1, characterized in that: It also comprises an air-blocking unit (50), wherein the air-blocking unit (50) comprises a guide plate (51) slidably connected to the interior of the cover body (21).

9. The air filter device for medical oxygen concentrator according to claim 8, characterized in that: The bottom of the guide plate (51) is fixedly connected to a support rod (52), and the bottom of the cover body (21) is threadedly connected to a knob (53).

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