Hospital hvac air filter convenient to disassemble

Abstract

The application discloses to the technical field of air conditioner parts, in particular to a hospital heating ventilation air conditioner air filter convenient to disassemble, including heating ventilation air conditioner cabinet group, heating ventilation air conditioner cabinet group is by fixed frame, cold and hot coil and energy-saving fan, heating ventilation air conditioner cabinet group is close to the side of fixed frame and is provided with air inlet, the beneficial effects of the application are: the filter frame and the filter assembly group body are driven by the inner embedded sliding block of the roller to move to the outside of the equipment, so that the staff does not need to directly operate the filter disassembly in the narrow space inside the heating ventilation air conditioner cabinet group, thereby reducing the inconvenience in the operation process, at the same time, the sealing plate one and the sealing plate two are turned over with the concave plate, so that the filter assembly group body can form a certain isolation with the air treatment area inside the equipment when moving outwards, reducing the possibility of dust falling off and forming dust flying due to shaking, collision or rapid extraction of the filter assembly group body, reducing the possibility of pollution to the subsequent treatment area.

Description

Technical Field

[0001] This invention relates to the field of air conditioning component technology, specifically to an easy-to-disassemble air filter for hospital HVAC systems. Background Technology

[0002] Hospital HVAC systems are typically used for air conditioning and purification in operating rooms, wards, ICUs, clean areas, and other medical functional areas. Their main function is to control the temperature, humidity, cleanliness, and airflow organization of indoor air. Air filters, as an important component of HVAC systems, consist of multiple filter elements and frames. They are fixed in the mounting slot of the air conditioning unit by bolts, pressure plates, slots, or ordinary clips. They are used to filter the air flowing through the equipment to reduce dust, particulate matter, and other impurities from entering the subsequent air treatment area. Because hospital environments have high requirements for air cleanliness, the filter assembly needs to be inspected, cleaned, or replaced regularly according to actual usage. In actual use, outside air first enters the HVAC equipment and flows along the predetermined airflow direction under the negative or positive pressure generated by the fan. After passing through the air filter installed in the air duct, particulate matter, dust and some impurities are trapped by the filter assembly body. The filtered air continues to enter the heat exchange, humidification, dehumidification or other air treatment areas, and is finally delivered to the room by the air supply structure. As the equipment operates for a longer period of time, dust and impurities gradually accumulate on the windward side of the filter assembly body, which gradually increases the ventilation resistance of the filter assembly body. Therefore, the staff needs to periodically remove the filter assembly body from the equipment and install a new filter assembly body or a filter assembly body that has undergone maintenance. When disassembling the filter assembly body, the staff needs to open the equipment maintenance door and operate in a confined space. When disassembling the air filter in a confined space, the staff usually needs to first release the bolts, pressure plates, clips or other limiting structures between the filter assembly body and the mounting slot, and then use their hands to hold the frame of the filter assembly body and remove it from the installation position. However, during long-term use, dust and particulate impurities will gradually accumulate on the windward side of the filter assembly. Some filter assemblies may also trap a large amount of fine particles inside. When the filter assembly shakes, collides, or is quickly pulled out in a confined space, the dust attached to the surface of the filter assembly is easily detached due to inertia, forming local dust inside the equipment and causing pollution in the heat exchange, humidification, dehumidification, or other air handling areas. Summary of the Invention

[0003] The purpose of this invention is to provide an easy-to-disassemble air filter for hospital HVAC systems, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an easily detachable air filter for hospital HVAC systems, comprising an HVAC cabinet assembly, which consists of a fixed frame, heating and cooling coils, and a blower. An air inlet is provided on the side of the HVAC cabinet assembly near the fixed frame, and multiple cabinet doors are provided on the outside of the HVAC cabinet assembly. A reinforcing plate is fixedly connected inside the HVAC cabinet assembly. A concave plate is slidably connected inside the fixed frame. A filter frame is slidably connected inside the concave plate. Several filter assembly bodies are snapped into the filter frame. A push plate, a guide rail plate, and a central support plate are fixedly connected to the side of the concave plate away from the reinforcing plate. A trapezoidal plate, a fixed plate, and an insert plate are fixedly connected to the side of the fixed frame away from the reinforcing plate. Rollers with embedded sliders are fixedly connected to the upper and lower sides of the concave plate, and the rollers with embedded sliders are slidably connected to the fixed frame. A contact plate is fixedly connected to one side of the filter frame.

[0005] As a further embodiment of the present invention, the fixed frame is provided with symmetrical sliding grooves on the upper and lower sides, and a T-shaped toothed plate is slidably connected in each sliding groove. The two ends of the T-shaped toothed plate are provided with teeth. The upper and lower sides of the fixed frame are provided with symmetrical rotating grooves. Gear threaded sleeve one and gear threaded sleeve two are rotatably connected in the two rotating grooves respectively, and gear threaded sleeve one and gear threaded sleeve two are symmetrical to each other. A connecting plate is fixedly connected to one side of the T-shaped toothed plate.

[0006] As a further embodiment of the present invention, the first gear threaded sleeve is internally threaded to a first threaded rod, the second gear threaded sleeve is internally threaded to a second threaded rod, a mounting base is provided inside the fixed frame, the lower ends of the first threaded rod and the second threaded rod are both fixedly connected to the top of the mounting base, and a sealing strip is fixedly connected to the bottom of the mounting base.

[0007] As a further embodiment of the present invention, a limiting rod is fixedly connected to the side of the T-shaped toothed plate near the gear thread sleeve, and a circular block is fixedly connected to one end of the limiting rod. A contraction groove is provided in the fixed frame for the limiting rod and the circular block to slide. A spring is sleeved on the limiting rod, and the two ends of the spring are fixedly connected to the contraction groove and the circular block, respectively.

[0008] As a further embodiment of the present invention, the side of the guide rail plate has a through vertical groove, and a slide plate is slidably connected in the vertical groove. The slide plate is in contact with the connecting plate. A magnetic block is fixedly connected to the side of the connecting plate away from the slide plate. A fixing rod is fixedly connected to the side of the slide plate away from the concave plate by a support block. A concave groove is formed on the side of the slide plate close to the concave plate. The bottom of the concave groove is symmetrically set as an inclined surface. An auxiliary plate is fixedly connected to the side of the guide rail plate away from the concave plate. The fixing rod passes through and is slidably inserted into the auxiliary plate. A second spring is sleeved on the fixing rod. The two ends of the second spring are fixedly connected to the auxiliary plate and the slide plate, respectively. A sleeve is fixedly connected to one side of the upper end of the middle support plate. A spiral guide groove is formed on the outer surface of the sleeve. A groove is formed on the outer side of the sleeve facing the concave plate, and the insert plate is slidably connected to the groove.

[0009] As a further embodiment of the present invention, a magnetic switch is fixedly connected to the side of the insert plate away from the concave plate. The magnetic switch has a magnetic adsorption end near the magnetic block, and a knob is rotatably installed at the other end of the magnetic switch. A guide rod is fixedly connected to the outer surface of the knob and slides in the guide groove. A movable frame is slidably connected to one side of the filter frame. Several clamping plates are provided on one side of the movable frame. A pressure plate is provided inside the filter frame and is fixedly installed on the side of the filter frame. Protrusions are fixedly connected to both the upper and lower sides of the movable frame. A strip-shaped dovetail slider is fixedly connected to the side of the movable frame near the filter frame. Baffles are fixedly connected to the upper and lower sides of the filter assembly body and are attached to the side of the filter frame. Sealing grooves are provided on both the upper and lower sides of the filter frame.

[0010] As a further embodiment of the present invention, a protective plate is fixedly connected to one side of the movable frame, a movable rod is slidably inserted into and through the pressure plate, one end of the movable rod is fixedly connected to the inner wall of the movable frame, a spring three is sleeved on the movable rod, the two ends of the spring three are fixedly connected to the pressure plate and the movable frame respectively, an inclined plate is fixedly connected to the top of the concave plate, an installation groove is opened on the top of the fixed frame, a top plate is fixedly connected to the top of the installation groove, a spring four is fixedly connected to the bottom of the top plate, a pull plate is fixedly connected to the bottom end of the spring four, and the pull plate is slidably disposed in the installation groove, and the pull plate is engaged with the inclined plate.

[0011] As a further embodiment of the present invention, the upper end of the reinforcing plate is rotatably connected to a sealing plate one via a rotating shaft, the lower end of the reinforcing plate is rotatably connected to a sealing plate two via a rotating shaft, and an elastic plate is fixedly connected to the bottom of the inner cavity of the HVAC cabinet unit. The bottom of the sealing plate two is in movable contact with the top of the elastic plate, and a positioning plate is fixedly connected to the top of the sealing plate one.

[0012] As a further embodiment of the present invention, a support plate is fixedly connected to the side of the fixed frame near the reinforcing plate, a rack plate is fixedly connected to the bottom of the support plate, a transmission rod is rotatably connected inside the reinforcing plate, a spur gear is fixedly connected to the top of the transmission rod, and bevel gear one and bevel gear two are symmetrically fixedly connected to the outer surface of the transmission rod, and bevel gear column one and bevel gear column two are rotatably connected inside the reinforcing plate respectively.

[0013] As a further embodiment of the present invention, a positioning groove is provided in the concave plate, a sleeve plate is fixedly connected in the positioning groove, a threaded rod is threadedly connected in the sleeve plate, a suction cup is rotatably connected to the bottom end of the threaded rod, and a handle is provided on one side of the concave plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a reasonable structural design and strong functionality, and has the following advantages: 1. This invention, by setting a concave plate that can slide within a fixed frame and using a slider embedded in a roller to move the filter frame and filter assembly body as a whole outward of the equipment, eliminates the need for operators to directly disassemble the filter within the confined space inside the HVAC cabinet, thus reducing inconvenience during operation. Simultaneously, by rotating sealing plates one and two as the concave plate moves, the filter assembly body can be isolated from the internal air handling area of ​​the equipment when it is moved outward, reducing the likelihood of dust falling off and creating dust due to shaking, collision, or rapid extraction of the filter assembly body, and minimizing the possibility of contamination of subsequent processing areas.

[0015] 2. This invention, by setting up a T-shaped toothed plate, a first gear threaded sleeve, a second gear threaded sleeve, a first threaded rod, a second threaded rod, and a mounting base, enables the concave plate to drive the two gear threaded sleeves to rotate synchronously during movement. The threaded rod then drives the mounting base and sealing strip to move, thereby achieving automatic separation of the sealing strip from the sealing groove when the filter frame is removed. This avoids significant sealing friction resistance during the filter frame's movement. When the filter frame is reinstalled, the sealing strip can automatically re-fit against the sealing groove, improving the sealing performance of the filter frame after installation and reducing air leakage from the gaps around the filter frame.

[0016] 3. This invention, by setting a movable frame, a locking plate, a protrusion, and a spring on the filter frame, and by having the fixed plate contact the protrusion to drive the movable frame to move, allows multiple locking plates to simultaneously disengage from their corresponding baffles, thereby releasing the limiting positions of multiple filter assembly bodies at once. This avoids the need for workers to operate individual buckles or limiting structures one by one, improving the replacement efficiency of the filter assembly bodies. At the same time, after the filter frame is reinstalled, the movable frame can be reset under the action of the spring, allowing the locking plates to re-engage with the baffles, synchronously limiting the positions of multiple filter assembly bodies, and improving the stability of the filter assembly bodies after installation.

[0017] 4. This invention, by setting a sleeve plate, a threaded rod three, and a suction cup inside the concave plate, and in conjunction with a handle, allows workers to easily pull the concave plate and filter frame outwards. After the filter assembly body is completely removed, rotating the threaded rod three makes the suction cup contact the ground, which can provide auxiliary support for the outwardly protruding concave plate, reducing shaking during the disassembly and assembly of the filter assembly body. At the same time, after the concave plate is retracted into the fixed frame, it can be locked by the suction cup contacting the inner wall of the fixed frame, and together with the pull plate, spring four, and inclined plate, a self-locking structure is formed, improving the overall stability of the filter after installation. Attached Figure Description

[0018] Figure 1 This is a perspective view of an easily detachable air filter for hospital HVAC systems according to the present invention. Figure 2 This is a sectional view of the HVAC cabinet assembly for easy disassembly and assembly of an air filter for hospital HVAC systems according to the present invention; Figure 3 This is a perspective view of the mounting frame, concave plate, and filter frame of the air filter for easy disassembly and assembly used in hospital HVAC systems according to the present invention. Figure 4 This is a half-sectional view of the air filter fixing frame for easy disassembly and assembly used in hospital HVAC systems according to the present invention; Figure 5 This invention relates to an easily removable air filter for hospital HVAC systems. Figure 4 Enlarged view of point A in the middle; Figure 6 This is a sectional view of the air filter fixing frame for easy disassembly and assembly used in hospital HVAC systems according to the present invention; Figure 7 This is a perspective view of the air filter reinforcement plate and concave plate for easy disassembly and assembly in hospital HVAC systems according to the present invention; Figure 8 This is a perspective view of the air filter fixing frame and concave plate for easy disassembly and assembly in hospital HVAC systems according to the present invention; Figure 9 This is a perspective view of the air filter guide rail plate for easy disassembly and assembly in hospital HVAC systems according to the present invention; Figure 10 This is a perspective view of the air filter insert plate for easy disassembly and assembly in hospital HVAC systems according to the present invention; Figure 11 This is a perspective view of the central support plate of the easily detachable air filter for hospital HVAC systems according to the present invention; Figure 12 This is a perspective view of the filter frame for an easily detachable air filter used in hospital HVAC systems according to the present invention. Figure 13 This is a half-sectional view of the movable air filter bracket for easy disassembly and assembly in hospital HVAC systems according to the present invention; Figure 14This is a perspective view of the easily detachable and removable air filter sleeve and concave plate for hospital HVAC systems according to the present invention; Figure 15 This is a sectional view of the transmission rod for an easily detachable air filter used in hospital HVAC systems according to the present invention. Figure 16 This invention relates to an easily removable air filter for hospital HVAC systems. Figure 14 Enlarged view at point B in the middle; Figure 17 This is a half-sectional view of the air filter fixing frame and concave plate for easy disassembly and assembly in hospital HVAC systems according to the present invention; Figure 18 This is a perspective view of the concave plate for easy-to-disassemble air filter used in hospital HVAC systems according to the present invention. Figure 19 This is a side sectional view of the filter frame of the air filter for easy disassembly and assembly used in hospital HVAC systems according to the present invention.

[0019] In the diagram: 1. HVAC cabinet unit; 101. Hot and cold coils; 102. Air supply fan; 2. Air inlet; 3. Cabinet door; 4. Fixed frame; 41. Slide groove; 42. T-shaped toothed plate; 43. Gear threaded sleeve one; 44. Gear threaded sleeve two; 45. Threaded rod one; 46. Threaded rod two; 47. Limiting rod; 48. Spring one; 5. Reinforcing plate; 51. Elastic plate; 52. Sealing plate one; 53. Sealing plate 2; 54. Positioning plate; 6. Concave plate; 61. Push plate; 62. Guide rail plate; 621. Slide plate; 622. Inclined surface; 623. Fixing rod; 624. Spring 2; 625. Auxiliary plate; 63. Middle support plate; 631. Sleeve; 632. Guide groove; 633. Groove; 64. Trapezoidal plate; 65. Fixing plate; 66. Roller embedded slider; 67. Insert plate; 671. Magnetic 672. Magnetic adsorption end; 673. Knob; 674. Guide rod; 68. Handle; 7. Filter frame; 71. Filter assembly body; 72. Sealing groove; 73. Pressure plate; 74. Moving frame; 75. Protrusion; 76. Clamping plate; 77. Baffle; 78. Protective plate; 79. Moving rod; 710. Spring three; 711. Dovetail slider; 8. Inclined plate; 81. Top plate; 82. Pull plate; 83. Spring four; 9. Connecting plate; 91. Magnetic block; 10. Mounting base; 1001. Sealing strip; 11. Support plate; 111. Rack plate; 12. Transmission rod; 121. Bevel gear column one; 122. Bevel gear column two; 123. Bevel gear one; 124. Bevel gear two; 125. Spur gear; 13. Sleeve plate; 131. Threaded rod three; 132. Suction cup; 14. Contact plate. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1 to 19 The present invention provides a technical solution: an easy-to-disassemble air filter for hospital HVAC, including an HVAC cabinet 1, which is composed of a fixed frame 4, a heating and cooling coil 101 and a blower 102. An air inlet 2 is provided on the side of the HVAC cabinet 1 near the fixed frame 4, and multiple cabinet doors 3 are provided on the outside of the HVAC cabinet 1. A reinforcing plate 5 is fixedly connected inside the HVAC cabinet 1. The reinforcing plate 5 is composed of two plates, which are fixedly connected to the inner wall of the HVAC cabinet 1 and are symmetrical to each other. A concave plate 6 is slidably connected inside the fixed frame 4. The fixed frame 4 is a concave frame. The fixed frame 4 and the concave plate 6 form a rectangular frame. The upper and lower inner side walls of the fixed frame 4 are symmetrically provided with strip grooves. The upper and lower sides of the concave plate 6 are provided with strip plates that are adapted to the strip grooves. The strip plates are slidably connected to the adjacent strip grooves. A filter frame 7 is slidably connected inside the concave plate 6. Several filter assembly bodies 71 are snapped into the filter frame 7. A push plate 61, a guide rail plate 62 and a middle support plate 63 are fixedly connected to the side of the concave plate 6 away from the reinforcing plate 5. A trapezoidal plate 64, a fixing plate 65 and an insert plate 67 are fixedly connected to the side of the fixed frame 4 away from the reinforcing plate 5. Roller-embedded sliders 66 are fixedly connected to the upper and lower sides of the concave plate 6. The roller-embedded sliders 66 are slidably connected to the fixed frame 4. The side of the filter frame 7 has multiple stepped grooves arranged in a rectangular array. The filter assembly body 71 is snapped into the stepped grooves, so that the filter assembly body 71 can only be disassembled from one side of the filter frame 7. A contact plate 14 is fixedly connected to one side of the filter frame 7, and the contact plate 14 is symmetrically arranged on one side of the filter frame 7. The push plate 61 is symmetrically arranged vertically on the side of the concave plate 6 away from the reinforcing plate 5. The contact plate 14 is on the movement trajectory of the push plate 61. When the concave plate 6 slides a certain distance in the fixed frame 4, the push plate 61 will contact the contact plate 14 and apply a pushing force to the filter frame 7.

[0022] Among them, the push plate 61 is plate-shaped and fixed on one side of the far end of the concave plate 6. It is used to apply a pushing force to the filter frame 7 during the movement of the concave plate 6 to realize its translation. The guide plate 62 is arranged parallel to the same side of the push plate 61, and the middle support plate 63 is arranged parallel to the same side of the guide plate 62. There is a gap between the guide plate 62 and the middle support plate 63, and the two do not contact each other. The roller is embedded in the slider 66, which allows the concave plate 6 to slide smoothly within the fixed frame 4, thereby greatly reducing frictional resistance and improving the stability and ease of movement of the filter frame 7. The fixed frame 4 has symmetrically arranged sliding grooves 41 inside, and a T-shaped toothed plate 42 is slidably connected in each sliding groove 41. Both ends of the T-shaped toothed plate 42 are provided with teeth. The fixed frame 4 has symmetrically arranged rotating grooves inside the upper and lower sides. Gear threaded sleeve one 43 and gear threaded sleeve two 44 are rotatably connected in the two rotating grooves respectively, and gear threaded sleeve one 43 and gear threaded sleeve two 44 are symmetrical to each other. A connecting plate 9 is fixedly connected to one side of the T-shaped toothed plate 42. One end of the connecting plate 9 extends through the fixed frame 4 to the outside, and the connecting plate 9 is slidably connected to the fixed frame 4. Both ends of the T-shaped toothed plate 42 pass through the two rotating grooves respectively. The two ends of the T-shaped toothed plate 42 with teeth respectively mesh with the adjacent gear threaded sleeve one 43 and gear threaded sleeve two 44.

[0023] The gear threaded sleeve 43 is internally threaded with a threaded rod 45, and the gear threaded sleeve 44 is internally threaded with a threaded rod 46. The fixed frame 4 is provided with a mounting base 10. The lower ends of the threaded rod 45 and the threaded rod 46 are fixedly connected to the top of the mounting base 10, and the bottom of the mounting base 10 is fixedly connected with a sealing strip 1001. Specifically, the T-shaped toothed plate 42 drives the first gear threaded sleeve 43 and the second gear threaded sleeve 44 to rotate. The first gear threaded sleeve 43 and the second gear threaded sleeve 44 respectively push the first threaded rod 45 and the second threaded rod 46 to move up and down. The first threaded rod 45 and the second threaded rod 46 cooperate to drive the mounting base 10 to move up and down. The mounting base 10 drives the sealing strip 1001 to move up and down. When the sealing strip 1001 moves close to the filter frame 7, the sealing strip 1001 and the filter frame 7 are pressed together, which forms a clamping and positioning effect on the filter frame 7, and at the same time makes the filter frame 7 and the fixed frame 4 sealed together to prevent unfiltered air from passing through. When the sealing strip 1001 moves away from the filter frame 7, the filter frame 7 moves away from the fixed frame 4, causing the filter frame 7 to loosen its clamping on the fixed frame 4.

[0024] A limiting rod 47 is fixedly connected to the side of the T-shaped toothed plate 42 near the gear thread sleeve 43. A circular block is fixedly connected to one end of the limiting rod 47. A contraction groove is provided in the fixed frame 4 for the limiting rod 47 and the circular block to slide. A spring 48 is sleeved on the limiting rod 47. The two ends of the spring 48 are fixedly connected to the contraction groove and the circular block, respectively. The spring 48 applies elastic force to the circular block.

[0025] Among them, the slide groove 41 is T-shaped, and the T-shaped toothed plate 42 can slide back and forth in the T-shaped slide groove 41. The gear thread sleeve 1 43 and gear thread sleeve 2 44 have the same structure. Both are a cylinder with a gear sleeved on the outside. The cylinder and the gear are fixedly connected or integrally formed. The cylinder has threads inside, and the gear rings on the surface of gear thread sleeve 1 43 and gear thread sleeve 2 44 rotate in the rotation groove opened in the fixed frame 4. This can limit the rotation of gear thread sleeve 1 43 and gear thread sleeve 2 44 and prevent them from jumping up and down. When the concave plate 6 is pulled outward from the HVAC cabinet 1, the concave plate 6 will slide within the fixed frame 4 through the slider 66 embedded in the roller. At this time, the filter frame 7 is firmly clamped by the sealing strip 1001 and cannot move synchronously with the concave plate 6. At this time, the concave plate 6 and the filter frame 7 slide relative to each other, and the concave plate 6 slides outward along the filter frame 7. The concave plate 6 drives the drive mechanism to move synchronously, and the drive structure applies a thrust to the connecting plate 9. The connecting plate 9 then drives the T-shaped toothed plate 42 to slide in the slide groove 41. The T-shaped toothed plate 42 drives the limiting rod 47 to move synchronously. At the same time, the T-shaped toothed plate 42 drives the gear threaded sleeve 1 43 and the gear threaded sleeve 2 44 to rotate synchronously. The threaded rod 1 45 and the threaded rod 2 46 move upward in the corresponding gear threaded sleeve 1 43 and gear threaded sleeve 2 44. The threaded rod 1 45 and the threaded rod 2 46 drive the sealing strip 1001 upward through the mounting base 10. When the limiting rod 47 moves with the T-shaped toothed plate 42, the circular block at its end will compress the spring 1 48 and deform. When the connecting plate 9 loses its thrust, the spring 1 48 can push the circular block, the T-shaped toothed plate 42 and the connecting plate 9 to reset.

[0026] The side of the guide plate 62 has a vertical groove through which a convex slide plate 621 is slidably connected. The protrusion of the slide plate 621 is slidably inserted into the vertical groove. The convex slide plate 621 and the concave plate 6 are slidably connected up and down. Initially, the slide plate 621 is in contact with the connecting plate 9. A magnetic block 91 is fixedly connected to the side of the connecting plate 9 away from the slide plate 621. A fixing rod 623 is fixedly connected to the side of the slide plate 621 away from the concave plate 6 through a support block. Specifically, the upper end of the fixing rod 623 is fixedly connected to the support block, and the support block is fixedly connected to the slide plate 621; The slide plate 621 has a concave groove on the side near the concave plate 6. The bottom of the concave groove is symmetrically set as an inclined surface 622. When the slide plate 621 moves back and forth with the concave plate 6, when the slide plate 621 contacts the inclined sides on both sides of the trapezoidal plate 64, the inclined side contacts the inclined surface 622 of the concave groove first. At this time, the trapezoidal plate 64 will push the slide plate 621 to move downward. When the bottom of the concave groove contacts the bottom of the trapezoidal plate 64, the upper end of the slide plate 621 separates from the connecting plate 9. The upper surface of the slide plate 621 is below the lower surface of the connecting plate 9, and the two are misaligned. At the same time, the slide plate 621 is below the insert plate 67. An auxiliary plate 625 is fixedly connected to the side of the guide rail plate 62 away from the concave plate 6. A fixing rod 623 passes through and is slidably inserted into the auxiliary plate 625. A second spring 624 is sleeved on the fixing rod 623. The two ends of the second spring 624 are fixedly connected to the auxiliary plate 625 and the slide plate 621 respectively. The second spring 624 applies an upward elastic force to the support block. When the concave plate 6 is pulled, the sliding plate 621, in contact with the connecting plate 9, immediately pushes the connecting plate 9 and the T-shaped toothed plate 42 to move synchronously. As the sliding plate 621 and the guide rail plate 62 move with the concave plate 6, the magnetic block 91 on one side of the connecting plate 9 gradually contacts one side of the insert plate 67, and the left side of the trapezoidal plate 64 also contacts the inclined surface 622 of the concave groove. The trapezoidal plate 64 pushes the sliding plate 621 in the vertical groove of the guide rail plate 62. When the sliding plate 621 moves to the bottom of the connecting plate 9, it will disengage from the connecting plate 9. When the fixing rod 623 slides downward, the support block will compress the second spring 624 and deform. When the concave groove disengages from the trapezoidal plate 64, the sliding plate 621 pushes the support block upward under the action of the second spring 624. The support block drives the sliding plate 621 to move upward, so that the sliding plate 621 is at the top of the vertical groove. Initially, the sliding plate 621 is at the top of the vertical groove. A sleeve 631 is fixedly connected to one side of the upper end of the middle support plate 63. A spiral guide groove 632 is opened on the outer surface of the sleeve 631. A groove 633 is opened on the outer side of the sleeve 631 facing the concave plate 6, and the insert plate 67 is slidably connected to the groove 633. The middle support plate 63 has a notch. When the middle support plate 63 moves with the concave plate 6, the trapezoidal plate 64 will pass through the notch of the middle support plate 63 without causing obstruction. A magnetic switch 671 is fixedly connected to the side of the insert plate 67 away from the concave plate 6. The magnetic switch 671 has a magnetic adsorption end 672 at one end near the magnetic block 91. A knob 673 is rotatably installed at the other end of the magnetic switch 671. The knob 673 is used to control the start and stop of the magnetic adsorption end 672. A guide rod 674 is fixedly connected to the outer surface of the knob 673. Initially, the guide rod 674 slides in the guide groove 632. When the slide plate 621 comes into contact with the trapezoidal plate 64, the slide plate 621 is located below the magnetic switch 671 and will not obstruct the normal movement of the slide plate 621 and the guide rail plate 62. The guide groove 632 inside the sleeve 631 is constructed as a spiral slide with a specific lift, and the spiral line precisely crosses a 90-degree central angle in the circumferential direction. When the concave plate 6 moves, the guide rail plate 62 and the middle support plate 63 move synchronously. Since the guide rod 674 is initially located in the innermost end of the guide groove 632, the guide rod 674 will be pushed by the guide groove 632 as the sleeve 631 moves, until the sleeve 631 drives the guide groove 632 to separate from the guide rod 674. At this time, the guide rod 674... Driven by the guide groove 632, the rotation is 90 degrees. The guide rod 674 drives the knob 673 to rotate 90 degrees, which opens the magnetic switch 671. Then the magnetic adsorption end 672 inside the magnetic switch 671 becomes magnetic. When the connecting plate 9 is in contact with the magnetic adsorption end 672, the magnetic block 91 will be attracted to the magnetic adsorption end 672 and the two are firmly connected together. At this time, the elastic force of the spring 48 cannot overcome the magnetic attraction between the magnetic block 91 and the magnetic adsorption end 672, and the T-shaped tooth plate 42 cannot be reset. A movable frame 74 is slidably connected to one side of the filter frame 7. Several clamping plates 76 are provided on one side of the movable frame 74, and these clamping plates 76 are respectively located at the upper and lower ends of each filter assembly body 71. A pressure plate 73 is provided inside the movable frame 74 and is fixedly installed on the side of the filter frame 7. Protrusions 75 are fixedly connected to both the upper and lower sides of the movable frame 74. There is a certain gap between the bottom end of the contact plate 14 and the top end of the protrusion 75. A swallow-shaped object is fixedly connected to the side of the movable frame 74 closest to the filter frame 7. The tail slider 711 and the two protrusions 75 are located at the end of the movable frame 74. The protrusions 75 are located below the moving path of the push plate 61 and the two do not contact each other directly. The contact plate 14 is on the moving path of the push plate 61. The upper and lower parts of the filter assembly body 71 are fixedly connected with baffles 77, and the baffles 77 are attached to the side of the filter frame 7. The upper and lower sides of the filter frame 7 are provided with sealing grooves 72. Initially, the clamping plate 76 is clamped outside the baffle 77, so that the filter assembly body 71 is firmly clamped inside the filter frame 7. Specifically, the filter frame 7 has multiple strip-shaped dovetail grooves on its side, and the movable frame 74 has multiple strip-shaped dovetail sliders 711 on the side near the filter frame 7. The multiple dovetail sliders 711 are slidably connected to the adjacent dovetail grooves. Through the cooperation of the dovetail sliders 711 and the dovetail grooves, the movable frame 74 can slide stably along the filter frame 7. When the concave plate 6 and the filter frame 7 are assembled, the upper and lower sealing strips 1001 on the inner wall of the fixed frame 4 are engaged with the corresponding sealing grooves 72. The left side of the inner wall of the fixed frame 4 is provided with a compression sealing strip, and the right side of the inner wall of the concave plate 6 is provided with a compression sealing strip. When the filter frame 7 is installed with the fixed frame 4, the two compression sealing strips are pressed into the grooves on both sides of the filter frame 7. The two sealing strips 1001 and the compression sealing strips seal the fixed frame 4 after installation, preventing subsequent air leakage. A protective plate 78 is fixedly connected to one side of the movable frame 74. A movable rod 79 is slidably inserted into the pressure plate 73 and inserted through it. One end of the movable rod 79 is fixedly connected to the inner wall of the movable frame 74. A spring 710 is sleeved on the movable rod 79. The two ends of the spring 710 are fixedly connected to the pressure plate 73 and the movable frame 74 respectively. The spring 710 applies elastic force to the movable frame 74. The fixed plate 65 has a notch. When the guide plate 62 and the middle support plate 63 move with the concave plate 6, the guide plate 62 and the middle support plate 63 will pass through the notch. At the same time, the push plate 61 and the contact plate 14 can also pass through the notch without causing obstruction. As the concave plate 6 moves and gradually separates from the fixed frame 4, the sealing strip 1001 separates from the filter frame 7, and the push plate 61 contacts the contact plate 14. At this time, when the concave plate 6 continues to move, it will push the contact plate 14 and the filter frame 7 to move synchronously through the push plate 61. The filter frame 7 drives multiple filter assembly body 71 to move synchronously. When multiple filter assembly body 71 have moved to the outside, the protrusion 75 will contact the fixing plate 65. The fixing plate 65 will abut against the protrusion 75, and then continue to pull the concave plate 6 to move a distance along the HVAC cabinet 1. At this time, the push plate 61 will continue to push the filter frame 7 to move through the contact plate 14. The protrusion 75 is restricted by the fixing plate 65, so the moving frame 74 cannot move further. At this time, the filter frame 7 and the moving frame 74 slide and misalign. The filter frame 7 drives the filter assembly body 71 and the baffle 77 to move, so that the baffle 77 and the locking plate 76 on the moving frame 74 are misaligned. At this time, the locking plate 76 will not hinder the disassembly of the filter assembly body 71, and the multiple filter assembly body 71 will be unlocked. It is convenient to replace the filter assembly body 71 in sequence. The moving frame 74 will drive the moving rod 79 to move in the pressure plate 73. When the moving frame 74 moves, it will squeeze the spring 3 710 and deform. When the moving frame 74 loses resistance, it will be reset by the spring 3 710. The top of the concave plate 6 is fixedly connected to the inclined plate 8. The top of the fixed frame 4 is provided with an installation groove. The top of the installation groove is fixedly connected to the top plate 81. The bottom of the top plate 81 is fixedly connected to the spring 83. The bottom end of the spring 83 is fixedly connected to the pull plate 82. The spring 83 applies a downward elastic force to the pull plate 82. Vertical plates are symmetrically protruding on both sides of the pull plate 82. Limiting grooves that match the vertical plates are symmetrically provided on both sides of the installation groove. The vertical plates and the limiting grooves are slidably connected up and down. The pull plate 82 is slidably disposed in the installation groove. The pull plate 82 is engaged with the inclined plate 8. The lower end of the pull plate 82 has a beveled edge facing outward. When the concave plate 6 needs to be pulled, the pull plate 82 can be pushed upward, and the pull plate 82 will disengage from the beveled plate 8. When the concave plate 6 is reinserted into the HVAC cabinet 1, the beveled plate 8 will contact the beveled edge of the pull plate 82. When the pull plate 82 is squeezed, it will slide upward along the mounting groove, and the spring 83 will deform accordingly. When the beveled plate 8 moves to the inside of the pull plate 82, causing the beveled plate 8 and the pull plate 82 to be misaligned, the pull plate 82 will move downward under the elastic force of the spring 83, so that the pull plate 82 limits and engages the beveled plate 8, thereby enabling the concave plate 6 to be self-locked. The upper end of the reinforcing plate 5 is rotatably connected to the sealing plate 1 52 via a rotating shaft, and the lower end of the reinforcing plate 5 is rotatably connected to the sealing plate 2 53 via a rotating shaft. The sealing plate 1 52 and the sealing plate 2 53 are arranged symmetrically from top to bottom. The bottom of the inner cavity of the HVAC cabinet 1 is fixedly connected to the elastic plate 51. The bottom of the sealing plate 2 53 is in movable contact with the top of the elastic plate 51. When the sealing plate 2 53 is opened, it is used to support and limit the sealing plate 2 53. The top of the sealing plate 1 52 is fixedly connected to the positioning plate 54. A support plate 11 is fixedly connected to the side of the fixed frame 4 near the reinforcing plate 5. A rack plate 111 is fixedly connected to the bottom of the support plate 11. A transmission rod 12 is rotatably connected inside the reinforcing plate 5. A spur gear 125 is fixedly connected to the top of the transmission rod 12. A bevel gear 123 and a bevel gear 124 are symmetrically fixedly connected to the outer surface of the transmission rod 12. A bevel gear column 121 and a bevel gear column 122 are rotatably connected inside the reinforcing plate 5. A sealing plate 122 is fixedly connected to the bevel gear column 121 via a rotating shaft. A sealing plate 23 is fixedly connected to the bevel gear column 122 via a rotating shaft. Specifically, sealing plate 1 52 and sealing plate 2 53 are both fixedly connected to the rotating shaft, and bevel gear column 1 121 and bevel gear column 2 122 are respectively fixedly connected to the adjacent rotating shaft; The structures of bevel gear spur 122 and bevel gear spur 121 are identical, both consisting of a rotating rod and a bevel gear. The two bevel gears have the same dimensions as bevel gear 123 and bevel gear 124. The bevel gear in bevel gear spur 121 meshes with bevel gear 124, while the bevel gear in bevel gear spur 122 meshes with bevel gear 123. The conical surface of bevel gear 123 faces downwards, while the conical surface of bevel gear 124 faces upwards. When the transmission rod 12 rotates... The transmission rod 12 drives the bevel gear 123 and bevel gear 2 124 on it to rotate synchronously. The bevel gear 123 and bevel gear 2 124 drive the bevel gear column 121 and bevel gear column 2 122 to rotate respectively. At this time, the bevel gear column 121 and bevel gear column 2 122 rotate in opposite directions. The bevel gear column 121 and bevel gear column 2 122 drive the sealing plate 1 52 and sealing plate 2 53 to rotate through the rotating shaft respectively, so that the sealing plate 1 52 and sealing plate 2 53 flip open or close. The reinforcing plate 5 has a groove inside which the rotating shaft, transmission rod 12, bevel gear column 121, bevel gear column 122, bevel gear 123, and bevel gear 124 can rotate, so that they can be stably installed in the reinforcing plate 5. Furthermore, the spur gear 125 is located on the path of the rack plate 111's movement trajectory. When the concave plate 6 moves outward along the HVAC cabinet assembly 1, the concave plate 6 drives the support plate 11 and the rack plate 111 to move. The positioning plate 54 will first slide above the support plate 11. When the teeth at one end of the rack plate 111 are about to mesh with the spur gear 125, the support plate 11 will also disengage from the positioning plate 54. After that, when the rack plate 111 moves again, it will drive the spur gear 125 to rotate, and the spur gear 125 will drive the transmission rod 12 to rotate. This causes sealing plate 1 52 and sealing plate 2 53 to flip open. When the concave plate 6 pulls the HVAC cabinet 1 to its maximum stroke, sealing plate 1 52 and sealing plate 2 53 move closer to each other and flip to close. The inner cavity of the HVAC cabinet 1 is sealed by the cooperation of sealing plate 1 52 and sealing plate 2 53. When the concave plate 6 is pushed into the HVAC cabinet 1, the spur gear 125 will drive the transmission rod 12 to rotate in the opposite direction, while the sealing plate 1 52 and the sealing plate 2 53 will rotate synchronously in the opposite direction. The sealing plate 1 52 and the sealing plate 2 53 will flip open. When the sealing plate 1 52 flips to the top, the positioning plate 54 will flip above the support plate 11. When the rack plate 111 disengages from the spur gear 125, the support plate 11 is inserted under the positioning plate 54. The support plate 11 supports and limits the positioning plate 54, preventing the sealing plate 1 52 from flipping downward. At the same time, the sealing plate 2 53 will contact the top of the elastic plate 51. The elastic plate 51 is made of nitrile rubber, which can provide the necessary rebound force during the reset process of the sealing plate 2 53. The elastic deformation of the elastic plate 51 can absorb the impact load during the movement and extend the service life of the components. Among them, the length of the support plate 11 is longer than that of the rack plate 111, which provides the necessary length guarantee for the complete meshing of the spur gear 125 and the rack plate 111, and avoids the sealing plate 52 from being misaligned due to gravity due to lack of support. The lower end of the concave plate 6 is provided with a positioning groove, and a sleeve plate 13 is fixedly connected in the positioning groove. A threaded rod 131 is threadedly connected in the sleeve plate 13. A suction cup 132 is rotatably connected to the bottom end of the threaded rod 131. A handle 68 is provided on one side of the concave plate 6. Among them, the sleeve plate 13 is located in the area below the handle 68. When the concave plate 6 is inserted into the fixed frame 4, the suction cup 132 is first retracted into the positioning groove by rotating the threaded rod 131, which will not affect the retraction of the concave plate 6 into the fixed frame 4. After the concave plate 6 is pulled to the outside of the HVAC cabinet unit 1 and the pulling stops, the suction cup 132 is moved downward by rotating the threaded rod 131 until the lower end of the suction cup 132 is pressed into contact with the ground or bottom, which can support the position of the concave plate 6, making it easier to disassemble and assemble the filter assembly unit 71 later.

[0027] Working principle: When it is necessary to disassemble and assemble multiple filter assembly bodies 71 within the HVAC cabinet unit 1, first, rotate the threaded rod 131 to retract the suction cup 132 into the positioning groove. After the suction cup 132 disengages from the inner wall of the fixed frame 4, move the pull plate 82. The pull plate 82 will then disengage from the inclined plate 8. Subsequently, pull the concave plate 6 using the handle 68. The concave plate 6 will cause the guide rail plate 62 and the central support plate 63 to move synchronously. The sliding plate 621 will cause the connecting plate 9 and the T-shaped toothed plate 42 to move horizontally synchronously. The T-shaped toothed plate 42 will drive the gear threaded sleeve 1 43 and the gear threaded sleeve 2 44 to rotate synchronously. The threaded rod 1 45 and the threaded rod 2 46 will move upward within the corresponding gear threaded sleeve 1 43 and gear threaded sleeve 2 44. The threaded rod 1 45 and the threaded rod 2 46 will drive the sealing strip 1001 upward through the mounting base 10. When the limiting rod 47 moves with the T-shaped toothed plate 42, the circular block at its end will squeeze the spring 1 48 and deform. The mounting base 10 will drive the sealing strip 1001 to disengage from the sealing groove 72 on the surface of the filter frame 7. As the middle support plate 63 and guide rail plate 62 move simultaneously with the concave plate 6, the guide rod 674 is pushed by the guide groove 632 as the sleeve 631 moves until the sleeve 631 drives the guide groove 632 to separate from the guide rod 674. At this time, the guide rod 674 is pushed by the guide groove 632 to rotate 90 degrees. The guide rod 674 drives the knob 673 to rotate 90 degrees, so that the magnetic switch 671 is opened. Then the magnetic adsorption end 672 will contact and adsorb the magnetic block 91. When the concave plate 6 continues to move, the sleeve 631 will separate from the internal structure of the insert plate 67, and the left side of the trapezoidal plate 64 will also contact the inclined surface 622 of the concave groove. The trapezoidal plate 64 pushes the slide plate 621 to slide in the vertical groove of the guide rail plate 62, and the spring 624 deforms with the action of the slide plate 621. When the sealing strip 1001 disengages from the sealing groove 72 and the concave plate 6 continues to move, the push plate 61 on the surface of the concave plate 6 will contact the contact plate 14, and the positioning plate 54 will slide above the support plate 11. When the concave plate 6 moves outward along the HVAC cabinet 1, the concave plate 6 drives the support plate 11 and the rack plate 111 to move. The positioning plate 54 will first slide above the support plate 11. When the teeth at one end of the rack plate 111 are about to mesh with the spur gear 125, the support plate 11 will also disengage from the positioning plate 54. After that, when the rack plate 111 moves again, it will drive the spur gear 125 to rotate. The spur gear 125 will drive the transmission rod 12 to rotate, and the sealing plate 112 and the sealing plate 23 will flip open. When the concave plate 6 pulls the HVAC cabinet 1 to its maximum stroke, the sealing plate 112 and the sealing plate 23 will come close to each other and flip open to close. When the concave plate 6 is pulled to the appropriate position, the fixed plate 65 will contact the protrusion 75, and the protrusion 75 will drive the movable frame 74 to slide. The movable frame 74 is slidably connected to the adjacent dovetail groove through multiple dovetail sliders 711. After the movable frame 74 slides, the clamping plate 76 will disengage from the baffle 77, and the moving rod 79 will slide in the pressure plate 73 along with the movable frame 74. The spring 710 will deform as the movable frame 74 is squeezed. When the concave plate 6 moves to the appropriate position, the entire filter assembly body 71 is exposed, and then the threaded rod 131 rotates, which in turn drives the suction cup 132 to move, and the suction cup 132 will come into contact with the ground. After the multiple filter assembly units 71 are assembled, the suction cup 132 is restored, and the concave plate 6 is stored in the fixed frame 4 through the handle 68. When the concave plate 6 is pushed into the HVAC cabinet unit 1, the spur gear 125 will drive the transmission rod 12 to rotate in the opposite direction, and the sealing plate 1 52 and the sealing plate 2 53 will rotate in the opposite direction synchronously. The sealing plate 1 52 and the sealing plate 2 53 flip open. When the sealing plate 1 52 flips to the top, the positioning plate 54 will flip above the support plate 11. When the rack plate 111 disengages from the spur gear 125, the support plate 11 is inserted under the positioning plate 54. The support plate 11 supports and limits the positioning plate 54, so that the sealing plate 1 52 cannot flip downward. The inclined surface 622 will contact the inclined surface on the other side of the trapezoidal plate 64, and the guide groove 632 on the surface of the sleeve 631 will contact the guide rod 674. The guide rod 674 will drive the knob 673 to close. At this time, the magnetic adsorption end 672 loses its magnetism. When the filter frame 7 is attached to the fixed frame 4 through the concave plate 6, the T-shaped toothed plate 42 will be restored by the action of the spring 48. The sealing strip 1001 will be tightly attached to the sealing groove 72 on the surface of the filter frame 7 by the action of the threaded rod 45 and the threaded rod 46. Furthermore, the inclined plate 8 at the top of the concave plate 6 will contact the pull plate 82. When the pull plate 82 is squeezed, it will slide in the groove opened in the fixed frame 4, and the spring 83 will deform accordingly. When the inclined plate 8 and the pull plate 82 are in contact, the pull plate 82 will be reset by the action of the spring 83 and in contact with one side of the inclined plate 8. Then, the threaded rod 131 will drive the suction cup 132 to adhere to the inner wall of the fixed frame 4.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hospital HVAC air filter that is easy to disassemble and install, comprising an HVAC cabinet assembly (1), wherein the HVAC cabinet assembly (1) is composed of a fixed frame (4), heating and cooling coils (101) and a blower (102), wherein the HVAC cabinet assembly (1) has an air inlet (2) on the side near the fixed frame (4), and the HVAC cabinet assembly (1) has multiple cabinet doors (3) on the outside, characterized in that, A reinforcing plate (5) is fixedly connected inside the HVAC cabinet (1). A concave plate (6) is slidably connected inside the fixed frame (4). A filter frame (7) is slidably connected inside the concave plate (6). Several filter assembly bodies (71) are snapped into the filter frame (7). A push plate (61), a guide rail plate (62), and a middle support plate (63) are fixedly connected to the side of the concave plate (6) away from the reinforcing plate (5). A trapezoidal plate (64), a fixing plate (65), and an insert plate (67) are fixedly connected to the side of the fixed frame (4) away from the reinforcing plate (5). Roller-embedded sliders (66) are fixedly connected to the upper and lower sides of the concave plate (6). The roller-embedded sliders (66) are slidably connected to the fixed frame (4). A contact plate (14) is fixedly connected to one side of the filter frame (7).

2. The easily detachable air filter for hospital HVAC systems according to claim 1, characterized in that: The fixed frame (4) has symmetrically arranged sliding grooves (41) inside. Each sliding groove (41) is slidably connected to a T-shaped toothed plate (42). Both ends of the T-shaped toothed plate (42) are provided with teeth. The fixed frame (4) has symmetrically arranged rotating grooves inside the upper and lower sides. Gear threaded sleeve one (43) and gear threaded sleeve two (44) are rotatably connected in the two rotating grooves respectively. Gear threaded sleeve one (43) and gear threaded sleeve two (44) are symmetrical to each other. A connecting plate (9) is fixedly connected to one side of the T-shaped toothed plate (42).

3. The easily detachable air filter for hospital HVAC systems according to claim 2, characterized in that: The gear threaded sleeve one (43) is internally threaded with a threaded rod one (45), the gear threaded sleeve two (44) is internally threaded with a threaded rod two (46), the fixed frame (4) is provided with a mounting base (10), the lower ends of the threaded rod one (45) and the threaded rod two (46) are fixedly connected to the top of the mounting base (10), and the bottom of the mounting base (10) is fixedly connected with a sealing strip (1001).

4. The easily detachable air filter for hospital HVAC systems according to claim 2, characterized in that: The T-shaped toothed plate (42) is fixedly connected to a limiting rod (47) on the side near the gear thread sleeve (43). One end of the limiting rod (47) is fixedly connected to a circular block. The fixed frame (4) has a shrinkage groove for sliding between the limiting rod (47) and the circular block. The limiting rod (47) is sleeved with a spring (48). The two ends of the spring (48) are fixedly connected to the shrinkage groove and the circular block, respectively.

5. The easily detachable air filter for hospital HVAC systems according to claim 1, characterized in that: The guide rail plate (62) has a vertical groove running through its side. A sliding plate (621) is slidably connected in the vertical groove. The sliding plate (621) is in contact with the connecting plate (9). A magnetic block (91) is fixedly connected to the side of the connecting plate (9) away from the sliding plate (621). A fixing rod (623) is fixedly connected to the side of the sliding plate (621) away from the concave plate (6) by a support block. A concave groove is opened on the side of the sliding plate (621) close to the concave plate (6). The bottom of the concave groove is symmetrically set as an inclined surface (622). An auxiliary plate (623) is fixedly connected to the side of the guide rail plate (62) away from the concave plate (6). 5) The fixing rod (623) passes through and is slidably inserted into the auxiliary plate (625). The fixing rod (623) is sleeved with a second spring (624). The two ends of the second spring (624) are fixedly connected to the auxiliary plate (625) and the sliding plate (621) respectively. A sleeve (631) is fixedly connected to one side of the upper end of the middle support plate (63). A spiral guide groove (632) is opened on the outer surface of the sleeve (631). A groove (633) is opened on the outer side of the sleeve (631) facing the concave plate (6), and the insert plate (67) is slidably connected to the groove (633).

6. The easily detachable air filter for hospital HVAC systems according to claim 1, characterized in that: A magnetic switch (671) is fixedly connected to the side of the insert plate (67) away from the concave plate (6). The magnetic switch (671) has a magnetic adsorption end (672) at one end near the magnetic block (91). A knob (673) is rotatably installed at the other end of the magnetic switch (671). A guide rod (674) is fixedly connected to the outer surface of the knob (673), and the guide rod (674) slides in the guide groove (632). A movable frame (74) is slidably connected to one side of the filter frame (7). Several clamping plates are provided on one side of the movable frame (74). (76) A pressure plate (73) is provided inside the filter frame (7). The pressure plate (73) is fixedly installed on the side of the filter frame (7). The upper and lower sides of the movable frame (74) are fixedly connected with protrusions (75). The side of the movable frame (74) close to the filter frame (7) is fixedly connected with a strip-shaped dovetail slider (711). The upper and lower sides of the filter assembly body (71) are fixedly connected with baffles (77), and the baffles (77) are attached to the side of the filter frame (7). The upper and lower sides of the filter frame (7) are provided with sealing grooves (72).

7. The easily detachable air filter for hospital HVAC systems according to claim 6, characterized in that: A protective plate (78) is fixedly connected to one side of the movable frame (74). A movable rod (79) is slidably inserted into the pressure plate (73). One end of the movable rod (79) is fixedly connected to the inner wall of the movable frame (74). A spring three (710) is sleeved on the movable rod (79). Both ends of the spring three (710) are fixedly connected to the pressure plate (73) and the movable frame (74) respectively. An inclined plate (8) is fixedly connected to the top of the concave plate (6). An installation groove is opened on the top of the fixed frame (4). A top plate (81) is fixedly connected to the top of the installation groove. A spring four (83) is fixedly connected to the bottom of the top plate (81). A pull plate (82) is fixedly connected to the bottom of the spring four (83). The pull plate (82) is slidably installed in the installation groove. The pull plate (82) is engaged with the inclined plate (8).

8. The easily detachable air filter for hospital HVAC systems according to claim 1, characterized in that: The upper end of the reinforcing plate (5) is rotatably connected to a sealing plate (52) via a rotating shaft, and the lower end of the reinforcing plate (5) is rotatably connected to a sealing plate (53) via a rotating shaft. An elastic plate (51) is fixedly connected to the bottom of the inner cavity of the HVAC cabinet (1). The bottom of the sealing plate (53) is in contact with the top of the elastic plate (51). A positioning plate (54) is fixedly connected to the top of the sealing plate (52).

9. The easily detachable air filter for hospital HVAC systems according to claim 1, characterized in that: The fixed frame (4) is fixedly connected to a support plate (11) on the side near the reinforcing plate (5). The bottom of the support plate (11) is fixedly connected to a rack plate (111). A transmission rod (12) is rotatably connected inside the reinforcing plate (5). A spur gear (125) is fixedly connected to the top of the transmission rod (12). A bevel gear one (123) and a bevel gear two (124) are symmetrically fixedly connected to the outer surface of the transmission rod (12). A bevel gear column one (121) and a bevel gear column two (122) are rotatably connected inside the reinforcing plate (5).

10. The easily detachable air filter for hospital HVAC systems according to claim 1, characterized in that: The concave plate (6) has a positioning groove, and a sleeve plate (13) is fixedly connected in the positioning groove. A threaded rod three (131) is threadedly connected in the sleeve plate (13). A suction cup (132) is rotatably connected to the bottom end of the threaded rod three (131). A handle (68) is provided on one side of the concave plate (6).

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