HVAC Filters for Hospitals

Abstract

The present invention provides a HVAC filter for a hospital, which relates to the field of HVAC filters; it includes an outer frame; it also includes: a filter plate, the filter plate is fixedly installed in the outer frame, and a detachable adsorption plate is arranged on the front side of the filter plate; an upper slot body for inserting or pulling out the adsorption plate is opened on the top of the outer frame, and a self-locking mechanism is arranged on the left and right sides of the upper slot body, and the self-locking mechanism is used to lock the adsorption plate when it is inserted into the upper slot body; an elastic pushing mechanism, the elastic pushing mechanism is arranged inside the outer frame, and the elastic pushing mechanism is located below the upper slot body, and the elastic pushing mechanism is connected to a cleaning brush and a blow hood through a connecting rod. The self-locking mechanism is used for self-locking after the adsorption plate is installed, and at the same time, the elastic pushing mechanism is compressed. After the lock is released, the adsorption plate is pushed out from the installation position by the compression elastic force; and the movement generated during the downward pressing of the elastic pushing mechanism drives the cleaning brush and the blow hood to automatically clean the filter plate.

Description

Technical Field

[0001] This invention relates to the field of HVAC filters, and particularly to HVAC filters for use in hospitals. Background Technology

[0002] In hospital environments, HVAC system filters play a crucial role in maintaining indoor air quality and ensuring the health and safety of patients and medical staff.

[0003] Traditional HVAC filters typically consist of a screen filter and an activated carbon adsorption filter. The screen filter removes larger dirt and dust from the air, while the activated carbon adsorption filter removes harmful gases and odors. To maintain filtration efficiency, the entire system requires regular maintenance. During maintenance, cleaning the screen filter and replacing the activated carbon adsorption filter must be done separately, resulting in cumbersome and time-consuming maintenance procedures. Summary of the Invention

[0004] This invention provides a heating, ventilation, and air conditioning filter for hospitals to solve the technical problems of cumbersome and time-consuming maintenance operations.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions: This invention provides a heating, ventilation, and air conditioning filter for hospitals, comprising an outer frame; and further comprising: a filter plate, the filter plate being fixedly installed within the outer frame, the filter plate having a detachable adsorption plate on its front side; an upper groove for inserting or removing the adsorption plate from the top of the outer frame, the upper groove having self-locking mechanisms on both its left and right sides for locking the adsorption plate when inserted into the upper groove; an elastic pushing mechanism, the elastic pushing mechanism being located inside the outer frame and below the upper groove, the elastic pushing mechanism being connected to a cleaning brush and a blower hood via a connecting rod, the blower hood and the cleaning brush being respectively located on the front and rear sides of the filter plate; and a cleaning mechanism for cleaning the cleaning brush before use.

[0006] In this technical solution, a self-locking mechanism is used to lock the adsorption plate after installation. At the same time, it compresses the elastic pushing mechanism. After the lock is released, the compression force facilitates the push of the adsorption plate from the installation position. The movement generated when the elastic pushing mechanism is pressed down drives the cleaning brush and the blower to automatically clean the filter plate. This makes the overall maintenance only require the replacement of the adsorption plate, eliminating the need for manual cleaning of the filter plate and simplifying the maintenance process.

[0007] Preferably, the elastic pushing mechanism includes a bottom cover, a movable plate, and a second spring; the bottom of the bottom cover is fixedly connected to the bottom inner wall of the outer frame, a plurality of second springs are provided inside the bottom cover, the movable plate is disposed on the top of the bottom cover, and the movable plate is elastically connected to the bottom inner wall of the outer frame through the second springs.

[0008] In this technical solution, during the installation of the adsorption plate, the elastic pushing mechanism is compressed. The compression deformation of the elastic pushing mechanism provides an upward push for the subsequent disassembly of the adsorption plate.

[0009] Preferably, baffles are fixedly installed on both sides of the bottom cover, and the baffles and the top surface of the bottom cover form a groove for inserting the adsorption plate; a frame is fixedly fitted on the outside of the adsorption plate, and locking holes are opened on the top left and right sides of the frame, and inclined grooves are opened on the bottom two sides of the frame, and a gripping ring is fixedly installed on the top of the frame.

[0010] In this technical solution, a groove is formed to provide an installation and embedding space for the adsorption plate and its frame.

[0011] Preferably, the self-locking mechanism includes a pull block, a locking block, a first spring, and an extension seat; guide holes are provided on both the left and right sides of the top of the frame, and the guide holes pass through the stop strip; the locking block is connected to the guide holes with a clearance fit, and one end of the locking block is provided with an inclined surface adapted to the inclined groove; an inner groove is provided between the inner wall of the frame and the stop strip; an extension seat is fixedly installed on the locking block, and the extension seat extends into the inner groove; a first spring is provided in the inner groove, and the two ends of the first spring are fixedly connected to the inner groove wall and the extension seat respectively; a pull block is fixedly installed on the end of the locking block away from the inclined surface.

[0012] In this technical solution, the self-locking mechanism provides self-locking for the installation of the adsorption plate.

[0013] Preferably, three vertical slots are provided on the side wall of the outer frame, and a protective side cover is fixedly installed on the outer wall of the outer frame, covering the vertical slots. The connecting rod is disposed inside the protective side cover and is provided with a first end, a second end, and a third end. The first end, the second end, and the third end respectively pass through the three vertical slots, and a sealing strip for covering the vertical slots is fixedly installed on the first end, the second end, and the third end. The first end is fixedly connected to the side wall of the movable plate, the second end is fixedly connected to the blower cover, and the third end is connected to the cleaning strip brush.

[0014] In this technical solution, the vertical groove provides space for the first end, the second end, and the third end to move, and a sealing strip is provided to seal the vertical groove.

[0015] Preferably, the distance between the blower hood and the bottom inner wall of the outer frame is greater than the distance between the cleaning strip brush and the bottom inner wall of the outer frame.

[0016] In this technical solution, through the above design, during the process of the blower hood and the cleaning strip brush moving downwards together, the cleaning strip brush first brushes the filter section, and then the brushed area is cleaned by the blower hood.

[0017] Preferably, it further includes an air source mechanism, which includes an airbag and an air outlet pipe; the number of airbags is several, and the several airbags are all arranged inside the bottom cover. The bottom end of the airbag is fixedly connected to the inner wall of the bottom of the outer frame, and the top end of the airbag is fixedly connected to the bottom surface of the movable plate. A first one-way valve and a second one-way valve are installed at the bottom end of the airbag. The first one-way valve is connected to the outside of the outer frame, and the second one-way valve is connected to the air outlet pipe. The air outlet pipe is connected to a spiral hose, and the hose is located below the blower cover. The blower cover is provided with an air inlet, and the air inlet is connected to the top end of the hose.

[0018] In this technical solution, the air source mechanism provides airflow to the blower hood.

[0019] Preferably, the filter plate is provided with a filter section, which is composed of a plurality of filter holes opened on the filter plate and distributed in a rectangular array. The filter plate is also provided with a V-shaped groove, which is located above the filter section. The cleaning mechanism includes a rotating shaft rotatably installed in the V-shaped groove. The rotating shaft is provided with a plurality of cleaning rods at equal intervals along its length. One end of the rotating shaft is fixedly connected to a rotating disk.

[0020] In this technical solution, a cleaning mechanism is set up so that the brush bristles are cleaned after the cleaning strip brush moves to its highest position.

[0021] Preferably, the cleaning strip brush includes bristles, a strip, and a first permanent magnet; bristles are provided on the surface of the strip facing the filter plate, and the first permanent magnet is fixedly installed on the surface of the strip away from the filter plate; an adjustment mechanism is provided on the rear side of the cleaning strip brush; the adjustment mechanism includes an iron strip; the iron strip is vertically arranged, and the top end of the iron strip is fixedly connected to the top inner wall of the outer frame; a second permanent magnet attracted to the first permanent magnet is provided on one side of the lower part of the filter section, and a third permanent magnet repelling the first permanent magnet is provided on one side of the V-groove; both the second permanent magnet and the third permanent magnet are fixedly installed on the iron strip.

[0022] Preferably, the cleaning brush strip is fixedly connected to a square rod, and a square hole is provided at the end of the third end. The square rod is connected to the square hole with a clearance fit. A third spring is provided in the square hole, one end of the third spring is fixedly connected to the wall of the square hole, and the other end of the third spring is fixedly connected to the square rod.

[0023] In this technical solution, an adjustment mechanism is used to drive the cleaning strip brush to separate from or adhere to the filter plate. When moving on the cleaning strip brush, the cleaning strip brush separates from the filter plate. When moving downwards, the cleaning strip brush adheres to the filter plate, ensuring downward brushing.

[0024] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0025] The positive and progressive effects of this invention are as follows: The aforementioned HVAC filter for hospitals utilizes a flexible pushing mechanism, an upper tank, and a self-locking mechanism to facilitate the installation and removal of the adsorption plate. During installation, the adsorption plate is inserted into the upper tank and installed into the outer frame. This presses down on the flexible pushing mechanism, causing compression deformation, while the self-locking mechanism provides self-locking. During subsequent removal, the self-locking mechanism is unlocked, and the force of the compression deformation provides an upward push to the adsorption plate, facilitating its disengagement from the self-locking mechanism. Overall, installation and removal are convenient. Furthermore, a cleaning strip... The brush, blower hood, and cleaning strip brush and blower hood are connected to the elastic pushing mechanism via a connecting rod. When the elastic pushing mechanism is pressed down, it can drive the cleaning strip brush and blower hood to automatically clean the filter plate. This allows the filter plate to be cleaned during the disassembly and replacement of the adsorption plate without any additional operation, simplifying the overall maintenance of the HVAC filter. The cleaning is achieved by brushing off the dirt attached to the surface with the cleaning strip brush and blowing it with the blower hood. The airflow helps to blow out the dirt from the filter holes, ensuring a good cleaning effect. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall rear structure of the present invention.

[0027] Figure 2 This is a schematic diagram of the overall front structure of the present invention.

[0028] Figure 3 This is a cross-sectional structural diagram of the adsorption plate, elastic pushing mechanism, and outer frame of the present invention.

[0029] Figure 4 For the present invention Figure 3 Enlarged structural diagram of section A in the middle.

[0030] Figure 5 For the present invention Figure 3 Enlarged structural diagram of section B in the middle.

[0031] Figure 6 This is a schematic diagram of the structure of the adsorption plate of the present invention.

[0032] Figure 7 This is a schematic diagram of the gas source mechanism of the present invention.

[0033] Figure 8 This is a schematic diagram of the structure of the rear side of the bottom cover of the present invention.

[0034] Figure 9 For the present invention Figure 8 Enlarged structural diagram of section C.

[0035] Figure 10 This is a schematic diagram of the internal structure of the outer frame of the present invention.

[0036] Figure 11 This is a schematic diagram of the internal structure of the protective side cover of the present invention.

[0037] Figure 12 This is a schematic diagram of the structure of the filter plate, blower hood, and cleaning brush of the present invention.

[0038] Figure 13 This is a three-dimensional schematic diagram of the cleaning strip brush, filter section, and adjustment mechanism of the present invention.

[0039] Figure 14 This is a cross-sectional schematic diagram of the cleaning strip brush, filter section, cleaning mechanism, and adjustment mechanism of the present invention.

[0040] Figure 15 This is a schematic diagram of the internal structure of the third end of the present invention.

[0041] Figure 16 This is a schematic diagram of the structure of the cleaning rods distributed on the rotating shaft according to the present invention.

[0042] Explanation of reference numerals in the attached figures 1. Outer frame; 101. Stop bar; 102. Upper groove body; 103. Vertical groove; 2. Filter plate; 201. Filter holes; 202. V-groove; 3. Cleaning strip brush; 301. Brush bristles; 302. Strip plate; 303. First permanent magnet; 4. Adsorption plate; 401. Frame; 402. Grip ring; 403. Lock hole; 404. Angled groove; 5. Self-locking mechanism; 501. Pull block; 502. Lock block; 503. Guide hole; 504. First spring; 505. Inner groove; 506. Extension seat; 6. Protective side cover; 7. Elastic pushing mechanism; 701. Base cover; 702. Movable plate; 703. Second spring; 8. Air supply mechanism; 801. Airbag; 802. First check valve; 803. Air outlet pipe; 804. Second check valve; 805. Hose; 9. Connecting rod; 901. First end; 902. Second end; 903. Third end; 9031. Square hole; 9032. Square rod; 9033. Third spring; 10. Air blower cover; 1001. Air inlet; 11. Dust collection box; 12. Adjustment mechanism; 1201. Iron bar; 1202. Second permanent magnet; 1203. Third permanent magnet; 13. Rotating disk; 14. Sealing strip; 15. Shaft; 1501. Cleaning rod. Detailed Implementation

[0043] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0044] like Figures 1-16 As shown, a heating, ventilation, and air conditioning filter for hospitals includes an outer frame 1; it also includes: a filter plate 2, which is fixedly installed inside the outer frame 1, and a detachable adsorption plate 4 is provided on the front side of the filter plate 2; an upper groove 102 is provided at the top of the outer frame 1 for inserting or removing the adsorption plate 4, and self-locking mechanisms 5 are provided on both the left and right sides of the upper groove 102 for locking the adsorption plate 4 when it is inserted into the upper groove 102; an elastic pushing mechanism 7, which is located inside the outer frame 1 and below the upper groove 102, and is connected to a cleaning brush 3 and a blower hood 10 via a connecting rod 9, with the blower hood 10 and the cleaning brush 3 respectively located on the front and rear sides of the filter plate 2; and a cleaning mechanism for cleaning the cleaning brush 3 before use.

[0045] In practice, the outer frame 1 is connected to the HVAC system, and dust is filtered through the filter section on the filter plate 2. Then, harmful gases and odors are adsorbed through the adsorption plate 4.

[0046] Among them, the adsorption plate 4 is preferably an activated carbon filter.

[0047] like Figure 3 As shown, the elastic pushing mechanism 7 includes a bottom cover 701, a movable plate 702, and a second spring 703; the bottom of the bottom cover 701 is fixedly connected to the bottom inner wall of the outer frame 1, a plurality of second springs 703 are provided inside the bottom cover 701, the movable plate 702 is disposed on the top of the bottom cover 701, and the movable plate 702 is elastically connected to the bottom inner wall of the outer frame 1 by the second springs 703.

[0048] Both sides of the bottom cover 701 are fixedly installed with baffles 101, and the baffles 101 and the top surface of the bottom cover 701 form a groove for inserting the adsorption plate 4; a frame 401 is fixedly sleeved on the outside of the adsorption plate 4, and the top left and right sides of the frame 401 are provided with lock holes 403, the bottom sides of the frame 401 are provided with inclined grooves 404, and the top of the frame 401 is fixedly installed with a grip ring 402.

[0049] like Figure 4 As shown, the self-locking mechanism 5 includes a pull block 501, a locking block 502, a first spring 504, and an extension seat 506. Guide holes 503 are provided on both the left and right sides of the top of the frame 401, and the guide holes 503 penetrate the stop strip 101. The locking block 502 is connected to the guide holes 503 with a clearance fit, and one end of the locking block 502 is provided with an inclined surface adapted to the inclined groove 404. An inner groove 505 is provided between the inner wall of the outer frame 1 and the stop strip 101. An extension seat 506 is fixedly installed on the locking block 502, and the extension seat 506 extends into the inner groove 505. A first spring 504 is provided in the inner groove 505, and both ends of the first spring 504 are fixedly connected to the wall of the inner groove 505 and the extension seat 506, respectively. The pull block 501 is fixedly installed on the end of the locking block 502 away from the inclined surface.

[0050] Among them, such as Figure 3 In the indicated state, the adsorption plate 4 is in the installed state, the locking block 502 is inserted into the locking hole 403, and the second spring 703 in the elastic pushing mechanism 7 is in the compressed state. The top and bottom surfaces of the movable plate 702 are respectively in contact with the bottom surface of the frame 401 and the top surface of the bottom cover 701 on the adsorption plate 4. During the maintenance of the entire filter, when the adsorption plate 4 is removed, the locking block 502 is pulled out of the locking hole 403 by pulling the pull block 501. At the same time, the extension seat 506 moves in the inner groove 505 and compresses the first spring 504. After the above operation, the unlocking is completed. The compression force of the second spring 703 causes the movable plate 702 to push the frame 401 on the adsorption plate 4 upward, thereby moving the locking hole 403 away from the self-locking mechanism 5. Then, by lifting the gripping ring 402, the adsorption plate 4 and the frame 401 are pulled out. After that, when the frame 401 is no longer obstructed, the locking block 502 is reset by the elastic force of the first spring 504.

[0051] After the above, install the new adsorption plate 4. By holding the grip ring 402, insert the adsorption plate 4 and the frame 401 into the upper groove 102 and into the outer frame 1. The inclined surface of the locking block 502 is pressed downward by the inclined groove 404, causing the locking block 502 to move away from the frame 401 and compressing the first spring 504. At the same time, the frame 401 pushes down the movable plate 702 until the movable plate 702 is in contact with the top surface of the bottom cover 701, and compresses the second spring 703, producing compression deformation. After the above operation, the lock hole 403 is aligned with the locking block 502. The elastic force of the first spring 504 causes the locking block 502 to be inserted into the lock hole 403 for self-locking.

[0052] With the above design, the installation of the adsorption plate 4 is as simple as inserting it into the upward groove 102; when disassembling, pull the pull block 501 to unlock it, and after unlocking, lift the adsorption plate 4 to remove it; after unlocking, the adsorption plate 4 is automatically pushed upward by the elastic force of the second spring 703, so that the lock hole 403 is not aligned with the lock block 502, and there is no need to keep the pull block 501 in a pulled state during the process of lifting the adsorption plate 4; in summary, the disassembly and assembly of the adsorption plate 4 is convenient.

[0053] like Figure 3 , Figure 9 and Figure 11 As shown, three vertical slots 103 are provided on the side wall of the outer frame 1. A protective side cover 6 is fixedly installed on the outer wall of the outer frame 1, and the protective side cover 6 covers the vertical slots 103. The connecting rod 9 is set inside the protective side cover 6, and the connecting rod 9 is provided with a first end 901, a second end 902 and a third end 903. The first end 901, the second end 902 and the third end 903 respectively pass through the three vertical slots 103, and a sealing strip 14 for covering the vertical slots 103 is fixedly installed on the first end 901, the second end 902 and the third end 903. The first end 901 is fixedly connected to the side wall of the movable plate 702, the second end 902 is fixedly connected to the blower cover 10, and the third end 903 is connected to the cleaning strip brush 3.

[0054] The first end 901, the second end 902, and the third end 903 on the connecting rod 9 enable the movable plate 702 to be connected to the blower cover 10 and the cleaning strip brush 3 via the connecting rod 9.

[0055] With the adsorption plate 4 in the installed state and the movable plate 702 in the low position, the sealing strip 14 seals the vertical groove 103, ensuring the sealing of the outer frame 1. At this time, the entire filter is in normal operating condition.

[0056] After the adsorption plate 4 is disassembled, the movable plate 702 moves to a high position and the sealing strip 14 leaves the vertical groove 103; at this time, the filter is in maintenance mode and filtration work is temporarily suspended.

[0057] like Figure 12 As shown, the distance between the blower cover 10 and the bottom inner wall of the outer frame 1 is greater than the distance between the cleaning strip brush 3 and the bottom inner wall of the outer frame 1.

[0058] During the process of moving the movable plate 702 from a high position to a low position, the cleaning brush 3 is driven by the connecting rod 9 to brush downward on the surface of the filter section. At the same time, the height of the blower hood 10 is higher than that of the cleaning brush 3, so that the position after the cleaning brush 3 is brushed is blown out by the blower hood 10, thus ensuring the cleaning effect.

[0059] It should be noted that when the movable plate 702 moves from the low position to the high position, the cleaning strip brush 3, through the action of the adjustment mechanism 12, does not stick to the filter part, thus not brushing the filter part, ensuring that it only brushes the filter part downwards.

[0060] In summary, the cleaning of the filter section is achieved by the movement of the movable plate 702, which does not require manual operation and simplifies the maintenance process.

[0061] The air outlet of the blower hood 10 is close to the filter plate 2, and a certain gap is maintained between the two to avoid friction between them. The gap size can be 1-2mm.

[0062] In specific implementation, such as Figure 12 As shown, a dust collection box 11 is installed at the bottom of the outer frame 1 below the cleaning strip brush 3 to collect the dust washed off by the brush. The dust collection box 11 is detachable and can be designed as a drawer or magnetic type.

[0063] like Figures 7-9 as well as Figure 12 As shown, it also includes an air source mechanism 8, which includes an airbag 801 and an air outlet pipe 803. There are several airbags 801, and all of them are arranged inside the bottom cover 701. The bottom end of the airbag 801 is fixed to the inner wall of the bottom of the outer frame 1, and the top end of the airbag 801 is fixed to the bottom surface of the movable plate 702. A first one-way valve 802 and a second one-way valve 804 are installed at the bottom end of the airbag 801. The first one-way valve 802 communicates with the outside of the outer frame 1, and the second one-way valve 804 is connected to the air outlet pipe 803. The air outlet pipe 803 is connected to a spiral hose 805, and the hose 805 is located below the blower cover 10. The blower cover 10 is provided with an air inlet 1001, and the air inlet 1001 is connected to the top end of the hose 805.

[0064] The air source mechanism 8 provides airflow to the blower hood 10. Specifically, during the upward movement of the movable plate 702, i.e., the removal of the adsorption plate 4, the movable plate 702 drives the airbag 801 from a contracted state to a stretched state, increasing its volume and allowing external space to enter through the first one-way valve 802. When the movable plate 702 moves downward, it drives the cleaning brush 3 to scrub the filter section, compressing the airbag 801 and squeezing out the gas inside. The gas then enters the air inlet 1001 through the second one-way valve 804, the air outlet pipe 803, and the hose 805, and then enters the blower hood 10. The blower hood 10 blows the gas onto the filter section for cleaning.

[0065] The hose 805 adopts a spiral design and has sufficient length to allow the blower shroud 10 to move up and down.

[0066] The airbag 801 is made of rubber and has a corrugated shape, allowing it to deform and expand.

[0067] like Figures 1-2 as well as Figures 12-16 As shown, the filter plate 2 is provided with a filter section, which is composed of a plurality of filter holes 201 opened on the filter plate 2 and distributed in a rectangular array. The filter plate 2 is also provided with a V-shaped groove 202, which is located above the filter section. The cleaning mechanism includes a rotating shaft 15 rotatably installed in the V-shaped groove 202. The rotating shaft 15 is provided with a plurality of cleaning rods 1501 at equal intervals along its length. One end of the rotating shaft 15 is fixedly connected to a rotating disk 13.

[0068] The cleaning strip brush 3 includes bristles 301, a strip 302, and a first permanent magnet 303. The bristles 301 are provided on the surface of the strip 302 facing the filter plate 2, and the first permanent magnet 303 is fixedly installed on the surface of the strip 302 away from the filter plate 2. An adjustment mechanism 12 is provided on the rear side of the cleaning strip brush 3. The adjustment mechanism 12 includes an iron strip 1201. The iron strip 1201 is vertically arranged, and the top end of the iron strip 1201 is fixedly connected to the top inner wall of the outer frame 1. A second permanent magnet 1202 that attracts the first permanent magnet 303 is provided on one side of the lower part of the filter section, and a third permanent magnet 1203 that repels the first permanent magnet 303 is provided on one side of the V-groove 202. The second permanent magnet 1202 and the third permanent magnet 1203 are both fixedly installed on the iron strip 1201.

[0069] The cleaning strip brush 3 has a strip plate 302 fixedly connected to a square rod 9032. A square hole 9031 is provided at the end of the third end 903. The square rod 9032 is connected to the square hole 9031 with a clearance fit. A third spring 9033 is provided in the square hole 9031. One end of the third spring 9033 is fixedly connected to the wall of the square hole 9031, and the other end of the third spring 9033 is fixedly connected to the square rod 9032.

[0070] like Figures 12-14 As shown, at this time, the cleaning brush 3 is in its lowest position, that is, the adsorption plate 4 is in the installed state, the cleaning brush 3 is below the filter section, the first permanent magnet 303 and the second permanent magnet 1202 are aligned, and the magnetic attraction between the two separates the cleaning brush 3 from the filter plate 2, so that they are not attached. At the same time, the third spring 9033 is in a compressed state. When the adsorption plate 4 is disassembled, the movable plate 702 moves, and the cleaning brush 3 moves upward through the connecting rod 9, and the first permanent magnet 303 moves away from the second permanent magnet. The first permanent magnet 303 is attached to the iron strip 1201. The magnetic attraction between the first permanent magnet 303 and the iron strip 1201 keeps the cleaning brush 3 separated from the filter plate 2, so that the cleaning brush 3 does not brush the filter section when it moves up, until the cleaning brush 3 moves to the V-groove 202, that is, moves to the highest position. At this time, the first permanent magnet 303 and the third permanent magnet 1203 are aligned. Through the repulsive force between the two, the cleaning brush 3 moves closer to the filter plate 2 and attaches.

[0071] After the cleaning strip brush 3 moves to the high position, the cleaning mechanism can clean the cleaning strip brush 3 to ensure that the bristles 301 are clean and to ensure the subsequent cleaning effect. Specifically, by rotating the rotating disk 13, the rotating shaft 15 is rotated, which in turn drives multiple cleaning rods 1501 to rotate. The cleaning rods 1501 move within the V-groove 202 to comb and clean the bristles 301.

[0072] After cleaning, during the installation of the new adsorption plate 4, the movable plate 702 moves downward, which in turn drives the cleaning brush 3 downward. Due to the large gap between the first permanent magnet 303 and the iron strip 1201, the magnetic attraction between the two is reduced, making it impossible to separate the cleaning brush 3 from the filter plate 2. During the downward movement of the cleaning brush 3, the cleaning brush 3 uses the bristles 301 to brush the filter section downward for cleaning.

[0073] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. A HVAC filter for a hospital, comprising an outer frame (1); characterized in that: Also includes: A filter plate (2), the filter plate (2) being fixedly mounted in the outer frame (1), and a detachable adsorption plate (4) being arranged on the front side of the filter plate (2); An upper slot (102) for inserting or removing the adsorption plate (4) is provided at the top of the outer frame (1), and self-locking mechanisms (5) are provided on both left and right sides of the upper slot (102), and the self-locking mechanisms (5) are used to lock the adsorption plate (4) when it is inserted into the upper slot (102); An elastic pushing mechanism (7), the elastic pushing mechanism (7) being arranged inside the outer frame (1), and the elastic pushing mechanism (7) being located below the upper tank body (102), the elastic pushing mechanism (7) being connected to a cleaning brush (3) and a blow hood (10) via a connecting rod (9), the blow hood (10) and the cleaning brush (3) being arranged on the front and rear sides of the filter plate (2), respectively; A cleaning mechanism, wherein the cleaning mechanism is used to clean the cleaning strip brush (3) before use.

2. The HVAC filter for hospital according to claim 1, characterized in that: The elastic pushing mechanism (7) comprises a bottom cover (701), a movable plate (702) and a second spring (703); the bottom of the bottom cover (701) is fixedly connected to the bottom inner wall of the outer frame (1); a plurality of second springs (703) are arranged inside the bottom cover (701); the movable plate (702) is arranged on the top of the bottom cover (701); and the movable plate (702) and the bottom inner wall of the outer frame (1) are elastically connected via the second spring (703).

3. The HVAC filter for hospital according to claim 2, characterized in that: The left and right sides of the bottom cover (701) are fixedly mounted with retaining bars (101), and the retaining bars (101) and the top side of the bottom cover (701) together form a groove body into which the adsorption plate (4) is inserted; the outer side of the adsorption plate (4) is fixedly sleeved with a frame (401), the top left and right sides of the frame (401) are provided with locking holes (403), the bottom sides of the frame (401) are provided with inclined grooves (404), and the top of the frame (401) is fixedly mounted with a holding ring (402).

4. The HVAC filter for hospital according to claim 3, characterized in that: The self-locking mechanism (5) comprises a pull block (501), a lock block (502), a first spring (504) and an extension seat (506); guide holes (503) are provided on both left and right sides of the top of the frame (401), and the guide holes (503) penetrate the blocking bar (101); the lock block (502) is connected to the guide holes (503) with clearance fit, and one end of the lock block (502) is provided with an inclined surface adapted to the inclined surface groove (404); the inner wall of the frame (401) An inner groove (505) is provided between the locking block (502) and the stop bar (101); an extension seat (506) is fixedly mounted on the locking block (502), and the extension seat (506) extends into the inner groove (505); a first spring (504) is arranged in the inner groove (505); two ends of the first spring (504) are respectively fixedly connected to the wall of the inner groove (505) and the extension seat (506); a pull block (501) is fixedly mounted on one end of the locking block (502) away from the inclined surface.

5. The HVAC filter for hospital according to claim 2, characterized in that: The outer frame (1) is provided with three vertical slots (103) on the side wall, a protective side cover (6) is fixedly mounted on the outer wall of the outer frame (1), and the protective side cover (6) covers the vertical slots (103), the connecting rod (9) is arranged in the protective side cover (6), and the connecting rod (9) is provided with a first end (901), a second end (902) and a third end (903), the first end (901), the second end (902) and the third end (903) respectively pass through the three vertical slots (103), and a blocking strip (14) for covering the vertical slots (103) is fixedly mounted on the first end (901), the second end (902) and the third end (903), the first end (901) is fixedly connected to the side wall of the movable plate (702), the second end (902) is fixedly connected to the blow hood (10), and the third end (903) is connected to the cleaning strip brush (3).

6. The HVAC filter for hospital according to claim 1, characterized in that: The distance between the blowing cover (10) and the inner wall of the bottom of the outer frame (1) is greater than the distance between the cleaning brush (3) and the inner wall of the bottom of the outer frame (1).

7. The HVAC filter for hospital according to claim 2, characterized in that: The invention also comprises an air source mechanism (8), wherein the air source mechanism (8) comprises an air bag (801) and an air outlet pipe (803); the number of the air bags (801) is several, and the several air bags (801) are all arranged in the bottom cover (701); the bottom end of the air bag (801) is fixedly connected to the inner wall of the bottom of the outer frame (1); the top end of the air bag (801) is fixedly connected to the bottom surface of the movable plate (702); the bottom end of the air bag (801) is installed with a first one-way valve ( 802 and a second one-way valve (804), the first one-way valve (802) being in communication with the outside of the outer frame (1), the second one-way valve (804) being connected to an air outlet pipe (803), the air outlet pipe (803) being connected to a spiral hose (805), and the hose (805) being located below the blow hood (10), the blow hood (10) being provided with an air inlet (1001), and the air inlet (1001) being connected to the top end of the hose (805).

8. The HVAC filter for hospital according to claim 5, characterized in that: The filter plate (2) is provided with a filter portion, the filter portion being composed of a plurality of filter holes (201) opened on the filter plate (2) and distributed in a rectangular array, the filter plate (2) is also provided with a V-shaped groove (202), and the V-shaped groove (202) is arranged above the filter portion; the cleaning mechanism comprises a rotating shaft (15) rotatably mounted in the V-shaped groove (202), the rotating shaft (15) being provided with a plurality of cleaning rods (1501) at equal intervals along the length direction, and one end of the rotating shaft (15) being fixedly connected to a rotating disk (13).

9. The HVAC filter for hospital according to claim 8, characterized in that: The cleaning strip brush (3) comprises bristles (301), a strip plate (302) and a first permanent magnet (303); the strip plate (302) is provided with bristles (301) on the plate surface facing the filter plate (2), and the strip plate (302) is fixedly mounted with the first permanent magnet (303) on the plate surface away from the filter plate (2); a positioning mechanism (12) is provided on the rear side of the cleaning strip brush (3); the positioning mechanism (12) comprises an iron bar (1201); the iron bar (1201) 201) is vertically arranged, and the top end of the iron bar (1201) is fixedly connected to the top inner wall of the outer frame (1), a second permanent magnet (1202) attracted to the first permanent magnet (303) is arranged on the lower side of the filter portion, and a third permanent magnet (1203) repelled from the first permanent magnet (303) is arranged on one side of the V-shaped groove (202), and the second permanent magnet (1202) and the third permanent magnet (1203) are both fixedly mounted on the iron bar (1201).

10. The HVAC filter for hospital according to claim 9, characterized in that: The strip plate (302) of the cleaning strip brush (3) is fixedly connected to a square rod (9032); a square hole (9031) is provided at the end of the third end head (903); the square rod (9032) is connected to the square hole (9031) with a clearance fit; a third spring (9033) is arranged in the square hole (9031); one end of the third spring (9033) is fixedly connected to the wall of the square hole (9031); and the other end of the third spring (9033) is fixedly connected to the square rod (9032).

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