HVAC Filters for Hospitals

Abstract

The present invention provides a heating, ventilation and air conditioning (HVAC) filter for hospitals, which relates to the field of HVAC filters; it includes an outer frame; and further includes: a filter plate, which is fixedly installed inside the outer frame, and a detachable adsorption plate is arranged on the front side of the filter plate; an upper groove body for inserting or pulling out the adsorption plate is opened at the top of the outer frame, and self-locking mechanisms are arranged on both the left and right sides of the upper groove body, and the self-locking mechanisms are used for locking when the adsorption plate is inserted into the upper groove body; an elastic pushing mechanism, which is arranged inside the outer frame and is located below the upper groove body, and the elastic pushing mechanism is connected with a cleaning brush strip and a blowing hood through a connecting rod. Through the self-locking mechanism, it is used for self-locking after the adsorption plate is installed, and at the same time, the elastic pushing mechanism will be compressed. After unlocking, through the compressed elastic force, it is convenient for the adsorption plate to be pushed out from the installation position; and during the process of pressing down the elastic pushing mechanism, the generated movement drives the cleaning brush strip and the blowing hood to automatically clean the filter plate.

Description

Technical Field

[0001] The present invention relates to the field of HVAC filters, and particularly to HVAC filters for hospitals. Background Art

[0002] In a hospital environment, the filters of the HVAC system play a crucial role, which is of great significance for maintaining the indoor air quality of the hospital and ensuring the health and safety of patients and medical staff.

[0003] Traditional HVAC filters usually have a filter screen and an activated carbon adsorption filter screen. The filter screen filters larger dirt and dust in the air, and then the activated carbon adsorption filter screen adsorbs and removes harmful gases and odors. In order to maintain the filtering effect, regular maintenance is required for the whole. During the maintenance process, the cleaning of the filter screen and the replacement of the activated carbon adsorption filter screen need to be carried out separately, resulting in cumbersome maintenance operations and large time consumption. Summary of the Invention

[0004] The present invention provides an HVAC filter for hospitals to solve the technical problems of cumbersome maintenance operations and large time consumption.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The present invention provides an HVAC filter for hospitals, including an outer frame; further including: 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 for inserting or pulling out the adsorption plate is opened at the top of the outer frame, and self-locking mechanisms are arranged on both the left and right sides of the upper slot, and the self-locking mechanisms are used for locking when the adsorption plate is inserted into the upper slot; an elastic pushing mechanism, the elastic pushing mechanism is arranged inside the outer frame and is located below the upper slot, the elastic pushing mechanism is connected with a cleaning brush strip and a blowing hood through a connecting rod, and the blowing hood and the cleaning brush strip are respectively arranged on the front and back sides of the filter plate; a cleaning mechanism, the cleaning mechanism is used for cleaning the cleaning brush strip before use.

[0007] In this technical solution, through the self-locking mechanism, it is used for self-locking after the adsorption plate is installed, and at the same time, the elastic pushing mechanism will be compressed. After unlocking, through the compressed elastic force, it is convenient to push the adsorption plate out of the installation position; when the elastic pushing mechanism is pressed down, the generated movement drives the cleaning brush strip and the blowing hood to automatically clean the filter plate, so that for the overall maintenance, only the replacement of the adsorption plate is required, and there is no need to perform manual cleaning operations on the filter plate, playing a role in simplifying the maintenance operations.

[0008] 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 inner wall of the bottom of the outer frame, a plurality of second springs are arranged inside the bottom cover, the movable plate is arranged on the top of the bottom cover, and the movable plate is elastically connected to the inner wall of the bottom of the outer frame through the second spring.

[0009] In this technical solution, during the installation process of the adsorption plate, the elastic pushing mechanism will be compressed, and the compression deformation of the elastic pushing mechanism provides an upward push for the subsequent disassembly of the adsorption plate.

[0010] Preferably, blocking strips are fixedly installed on both sides of the bottom cover, and a groove for inserting the adsorption plate is formed between the blocking strip and the top surface of the bottom cover; a frame is fixedly sleeved on the outside of the adsorption plate, locking holes are opened on the left and right sides of the top of the frame, inclined slots are opened on both sides of the bottom of the frame, and a holding ring is fixedly installed on the top of the frame.

[0011] In this technical solution, by forming the groove, an installation and embedding space is provided for the adsorption plate and the frame of the adsorption plate.

[0012] Preferably, the self-locking mechanism includes a pulling block, a locking block, a first spring, and an extension seat; guide holes are opened on the left and right sides of the top of the frame, and the guide holes penetrate through the blocking strip. The locking block is connected to the guide hole with a clearance fit, and one end of the locking block is provided with an inclined surface adapted to the inclined slot. An inner groove is opened between the inner wall of the frame and the blocking strip. An extension seat is fixedly installed on the locking block, and the extension seat extends into the inner groove. A first spring is arranged in the inner groove, and both ends of the first spring are fixedly connected to the inner groove wall and the extension seat respectively. A pulling block is fixedly installed at the end of the locking block away from the inclined surface.

[0013] In this technical solution, the self-locking mechanism provides self-locking for the installation of the adsorption plate.

[0014] Preferably, three vertical grooves are opened on the side wall of the outer frame, a protective side cover is fixedly installed on the outer wall of the outer frame, and the protective side cover covers the vertical grooves. The connecting rod is arranged inside the protective side cover, and a first end, a second end, and a third end are arranged on the connecting rod. The first end, the second end, and the third end respectively pass through the three vertical grooves, and sealing strips for covering the vertical grooves are 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 blowing hood, and the third end is connected to the cleaning brush strip.

[0015] In this technical solution, the vertical grooves provide a moving space for the first end, the second end, and the third end. At the same time, sealing strips are provided to block the vertical grooves.

[0016] Preferably, the distance between the blowing hood and the inner wall of the bottom of the outer frame is greater than the distance between the cleaning strip brush and the inner wall of the bottom of the outer frame.

[0017] In this technical solution, through the above design, during the downward movement of the blowing hood and the cleaning strip brush together, the cleaning strip brush first sweeps the filtering part, and after the sweeping position, the blowing hood blows and cleans it.

[0018] Preferably, it further includes a gas source mechanism, and the gas source mechanism includes an airbag and an air outlet pipe; the number of the airbags is several, and several airbags are all arranged in the bottom cover, the bottom end of the airbag is fixedly connected to the inner wall of the bottom of the outer frame, 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 communicates with the outside of the outer frame, the second one-way valve is connected with an air outlet pipe, the air outlet pipe is connected with a spiral hose, and the hose is located below the blowing hood, and the blowing hood is provided with an air inlet, and the air inlet is connected with the top end of the hose.

[0019] In this technical solution, the gas source mechanism provides the blowing air flow for the blowing hood.

[0020] Preferably, a filtering part is arranged on the filtering plate, and the filtering part is composed of several filter holes opened on the filtering plate and distributed in a rectangular array, and a V-shaped groove is further arranged on the filtering plate, and the V-shaped groove is arranged above the filtering part; the cleaning mechanism includes a rotating shaft rotatably installed in the V-shaped groove, several cleaning rods are arranged at equal intervals along the length direction of the rotating shaft, and a rotating disc is fixedly connected to one end of the rotating shaft.

[0021] In this technical solution, by arranging the cleaning mechanism, after the cleaning strip brush moves up to the highest position, the cleaning mechanism is used to clean the bristles.

[0022] Preferably, the cleaning strip brush includes bristles, a strip board and a first permanent magnet; the strip board is provided with bristles on the board surface facing the filtering plate, and a first permanent magnet is fixedly installed on the board surface of the strip board away from the filtering plate; a position adjusting mechanism is arranged at the rear side of the cleaning strip brush; the position adjusting mechanism includes an iron bar; the iron bar is arranged vertically, and the top end of the iron bar is fixedly connected to the inner wall of the top of the outer frame, a second permanent magnet attracting the first permanent magnet is arranged on one side below the filtering part, and a third permanent magnet repelling the first permanent magnet is arranged on one side of the V-shaped groove, and both the second permanent magnet and the third permanent magnet are fixedly installed on the iron bar.

[0023] Preferably, a square rod is fixedly connected to the strip board of the cleaning strip brush, a square hole is opened at the end of the third end, the square rod is connected with the square hole in a clearance fit manner, a third spring is arranged in the square hole, one end of the third spring is fixedly connected to the square hole wall, and the other end of the third spring is fixedly connected to the square rod.

[0024] In this technical solution, the position adjustment mechanism is used to drive the cleaning brush strip to separate from or fit with the filter plate. When moving on the cleaning brush strip, the cleaning brush strip is separated from the filter plate, and when moving below the cleaning brush strip, the cleaning brush strip fits with the filter plate to ensure downward brushing.

[0025] On the basis of conforming to the common knowledge in the art, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred examples of the present invention.

[0026] The positive and progressive effects of the present invention are as follows:

[0027] For the above-mentioned HVAC filter used in hospitals, through the setting of the elastic pushing mechanism, the upper groove body and the self-locking mechanism, the installation and disassembly of the adsorption plate are realized. When installing, the adsorption plate is inserted into the upper groove body and installed into the outer frame, which will press down the elastic pushing mechanism, causing it to produce compressive deformation. And through the self-locking mechanism to provide self-locking. When disassembling later, by operating the self-locking mechanism to unlock it, through the force of the above-mentioned compressive deformation, an upward thrust is provided for the adsorption plate to facilitate the adsorption plate to leave the self-locking mechanism, and the overall disassembly and assembly are convenient; further, through the cleaning brush strip, the blowing hood, and the cleaning brush strip and the blowing hood are connected to the elastic pushing mechanism through a connecting rod. During the process of pressing down the elastic pushing mechanism, the cleaning brush strip and the blowing hood can be driven to automatically clean the filter plate, realizing the cleaning of the filter plate during the disassembly, installation and replacement of the adsorption plate, without additional operations, simplifying the overall maintenance operation of the HVAC filter. And for the above-mentioned cleaning, the surface-attached dirt is brushed off by the cleaning brush strip, and then blown by the blowing hood. Through the air flow, it is convenient to blow out the dirt in the filter holes on it, ensuring the cleaning effect. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of the whole of the present invention from the rear.

[0029] Figure 2 It is a schematic structural diagram of the whole of the present invention from the front.

[0030] Figure 3 It is a schematic cross-sectional structural diagram of the adsorption plate, the elastic pushing mechanism and the outer frame of the present invention.

[0031] Figure 4 For the present invention Figure 3 It is an enlarged structural diagram of part A in the present invention.

[0032] Figure 5 For the present invention Figure 3 It is an enlarged structural diagram of part B in the present invention.

[0033] Figure 6 It is a schematic structural diagram of the adsorption plate of the present invention.

[0034] Figure 7Schematic diagram of the air source mechanism of the present invention.

[0035] Figure 8 Schematic diagram of the rear side of the bottom cover of the present invention.

[0036] Figure 9 For the present invention Figure 8 Schematic diagram of the enlarged structure of part C in the present invention.

[0037] Figure 10 Schematic diagram of the internal structure of the outer frame of the present invention.

[0038] Figure 11 Schematic diagram of the internal structure of the protective side cover of the present invention.

[0039] Figure 12 Schematic diagram of the filter plate, blowing hood and cleaning strip brush of the present invention.

[0040] Figure 13 Stereo diagram of the cleaning strip brush, filtering part and position adjusting mechanism of the present invention.

[0041] Figure 14 Cross-sectional view of the cleaning strip brush, filtering part, cleaning mechanism and position adjusting mechanism of the present invention.

[0042] Figure 15 Schematic diagram of the internal structure of the third end of the present invention.

[0043] Figure 16 Schematic diagram of the distribution of the cleaning rod on the rotating shaft of the present invention.

[0044] Explanation of reference numerals

[0045] 1. Outer frame; 101. Barrier strip; 102. Upper groove body; 103. Vertical groove

[0046] 2. Filter plate; 201. Filter hole; 202. V-shaped groove

[0047] 3. Cleaning strip brush; 301. Bristles; 302. Strip board; 303. First permanent magnet

[0048] 4. Adsorption plate; 401. Frame; 402. Holding ring; 403. Lock hole; 404. Inclined groove

[0049] 5. Self-locking mechanism; 501. Pulling block; 502. Lock block; 503. Guide hole; 504. First spring; 505. Inner groove; 506. Extension seat

[0050] 6. Protective side cover

[0051] 7. Elastic pushing mechanism; 701. Bottom cover; 702. Movable plate; 703. Second spring

[0052] 8. Air source mechanism; 801. Airbag; 802. First one-way valve; 803. Air outlet pipe; 804. Second one-way valve; 805. Hose;

[0053] 9. Connecting rod; 901. First end; 902. Second end; 903. Third end; 9031. Square hole; 9032. Square rod; 9033. Third spring;

[0054] 10. Blowing hood; 1001. Air inlet;

[0055] 11. Dust collection box;

[0056] 12. Position adjustment mechanism; 1201. Iron bar; 1202. Second permanent magnet; 1203. Third permanent magnet;

[0057] 13. Rotating disk;

[0058] 14. Sealing strip;

[0059] 15. Rotating shaft; 1501. Cleaning rod. Detailed implementation manners

[0060] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the described embodiments.

[0061] As Figures 1 - 16 shown, a heating, ventilation and air conditioning (HVAC) filter for a hospital includes an outer frame 1; it further includes: a filter plate 2, the filter plate 2 is fixedly installed in the outer frame 1, and a detachable adsorption plate 4 is arranged on the front side of the filter plate 2; an upper groove 102 for inserting or pulling out the adsorption plate 4 is formed at the top of the outer frame 1, and a self-locking mechanism 5 is arranged on both the left and right sides of the upper groove 102, and the self-locking mechanism 5 is used for locking in the state where the adsorption plate 4 is inserted into the upper groove 102; an elastic pushing mechanism 7, the elastic pushing mechanism 7 is arranged inside the outer frame 1 and is located below the upper groove 102, and the elastic pushing mechanism 7 is connected with a cleaning brush strip 3 and a blowing hood 10 through a connecting rod 9, and the blowing hood 10 and the cleaning brush strip 3 are respectively arranged on the front and back sides of the filter plate 2; a cleaning mechanism, and the cleaning mechanism is used for cleaning the cleaning brush strip 3 before use.

[0062] In specific implementation, the outer frame 1 is connected to the HVAC, and dust is filtered through the filtering part on the filter plate 2, and then harmful gases and odors are adsorbed through the adsorption plate 4.

[0063] Among them, the adsorption plate 4 is preferably an activated carbon filter mesh.

[0064] As Figure 3As 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 inner wall of the bottom 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 is elastically connected to the inner wall of the bottom of the outer frame 1 through the second spring 703.

[0065] Blocking strips 101 are fixedly installed on both sides of the bottom cover 701, and a groove for inserting the adsorption plate 4 is formed between the blocking strips 101 and the top surface of the bottom cover 701; a frame 401 is fixedly sleeved on the outside of the adsorption plate 4, locking holes 403 are formed in the left and right sides of the top of the frame 401, inclined slots 404 are formed in the bottom sides of the frame 401, and a holding ring 402 is fixedly installed on the top of the frame 401.

[0066] As Figure 4 As shown, the self-locking mechanism 5 includes a pulling block 501, a locking block 502, a first spring 504, and an extension seat 506; guide holes 503 are formed in the left and right sides of the top of the frame 401, and the guide holes 503 penetrate through the blocking strips 101, the locking block 502 is connected with the guide hole 503 in a clearance fit manner, and one end of the locking block 502 is provided with an inclined surface adapted to the inclined slot 404, an inner groove 505 is formed between the inner wall of the outer frame 1 and the blocking 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 arranged in the inner groove 505, and the two ends of the first spring 504 are respectively fixedly connected with the inner wall of the inner groove 505 and the extension seat 506, and a pulling block 501 is fixedly installed at the end of the locking block 502 away from the inclined surface.

[0067] Among them, in the state as Figure 3 shown, 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 a compressed state. The top and bottom surfaces of the movable plate 702 are respectively in contact with the bottom surface of the frame 401 on the adsorption plate 4 and the top surface of the bottom cover 701; during the maintenance of the entire filter to remove the adsorption plate 4, by pulling the pulling block 501, the locking block 502 is pulled out of the locking hole 403, and at the same time, the extension seat 506 moves in the inner groove 505 and compresses the first spring 504. After the above operations, the unlocking is completed, and through the compression elastic force of the second spring 703, the movable plate 702 pushes up the frame 401 on the adsorption plate 4, so that the locking hole 403 is far away from the self-locking mechanism 5, and then by lifting the holding ring 402, the adsorption plate 4 and the frame 401 are lifted out. After that, in the case of losing the blockage of the frame 401, the locking block 502 is reset by the elastic force of the first spring 504.

[0068] After the above, install the new adsorption plate 4. By holding the holding ring 402, insert the adsorption plate 4 and the frame 401 into the upper slot 102 and enter the outer frame 1. Among them, by means of the inclined surface groove 404, the inclined surface of the locking block 502 is extruded downward, so that the locking block 502 moves away from the frame 401 and compresses the first spring 504. At the same time, the frame 401 pushes down the movable plate 702 until the movable plate 702 fits against the top surface of the bottom cover 701, and at the same time compresses the second spring 703, generating a compressive deformation. After the above operations, the lock hole 403 is aligned with the locking block 502. By the elastic force of the first spring 504, the locking block 502 is inserted into the lock hole 403 for self-locking.

[0069] With the above design, the installation of the adsorption plate 4 only needs to insert the adsorption plate 4 into the upper slot 102; when disassembling, pull the pull block 501 to unlock, and after unlocking, lift the adsorption plate 4 upward to leave; and 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 locking block 502. During the process of lifting the adsorption plate 4 upward, there is no need to maintain the pulling state of the pull block 501; in summary, the disassembly and assembly operations of the adsorption plate 4 are convenient.

[0070] As Figure 3 、 Figure 9 and Figure 11 shown, three vertical grooves 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 grooves 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 grooves 103, and sealing strips 14 for covering the vertical grooves 103 are 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 blowing hood 10, and the third end 903 is connected to the cleaning strip brush 3.

[0071] Through the settings of the first end 901, the second end 902 and the third end 903 on the connecting rod 9, the movable plate 702 is connected to the blowing hood 10 and the cleaning strip brush 3 through the connecting rod 9.

[0072] When the adsorption plate 4 is in the installed state and the movable plate 702 is in the low position, the sealing strip 14 seals the vertical groove 103 to ensure the closure of the outer frame 1. At this time, the whole filter is in the normal operation state.

[0073] After the adsorption plate 4 is disassembled, the movable plate 702 moves to the high position and the sealing strip 14 leaves the vertical groove 103; at this time, the filter is in the maintenance state and the filtering work is not carried out temporarily.

[0074] As shown Figure 12 in the figure, the distance between the air blowing hood 10 and the inner wall of the bottom of the outer frame 1 is greater than the distance between the cleaning strip brush 3 and the inner wall of the bottom of the outer frame 1.

[0075] Among them, during the process of the movable plate 702 moving downward from the high position, driven by the connecting rod 9, the cleaning strip brush 3 brushes downward on the surface of the filtering part. At the same time, the height of the air blowing hood 10 is higher than that of the cleaning strip brush 3, so that after the cleaning strip brush 3 finishes brushing, the position is blown by the air blowing hood 10 to blow out the dust in the filter holes 201, ensuring the cleaning effect.

[0076] It should be noted that when the movable plate 702 moves from the low position to the high position, under the action of the position adjusting mechanism 12, the cleaning strip brush 3 does not fit with the filtering part, so as not to brush the filtering part, ensuring the function of only brushing the filtering part downward.

[0077] In summary, the cleaning of the filtering part is realized by driving the movable plate 702, which does not require manual active operation, simplifying the maintenance operation steps.

[0078] The air outlet of the air blowing hood 10 is close to the filter plate 2, and a certain gap is reserved between the two to avoid friction between the two. The size of the gap can be 1-2 mm.

[0079] During specific implementation, as shown Figure 12 in the figure, a dust collecting box 11 installed at the bottom of the outer frame 1 is arranged below the cleaning strip brush 3 for collecting the dust brushed off. The dust collecting box 11 is detachably installed, such as designed as a drawer, magnetic adsorption type, etc.

[0080] As shown Figures 7 - 9 and Figure 12 in the figure, it further includes a gas source mechanism 8. The gas source mechanism 8 includes an air bag 801 and an air outlet pipe 803; the number of the air bags 801 is several, and 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. A first one-way valve 802 and a second one-way valve 804 are installed at the bottom end of the air bag 801. The first one-way valve 802 is communicated with the outside of the outer frame 1, the second one-way valve 804 is connected with the air outlet pipe 803, the air outlet pipe 803 is connected with a spiral hose 805, and the hose 805 is located below the air blowing hood 10. The air blowing hood 10 is provided with an air inlet 1001, and the air inlet 1001 is connected to the top end of the hose 805.

[0081] The air source mechanism 8 provides the airflow for blowing to the blowing hood 10. Specifically, when the movable plate 702 moves upward, that is, during the process of taking out the adsorption plate 4, the movable plate 702 drives the airbag 801 to change from the contracted state to the stretched state, its volume increases, and the outside space enters through the first one-way valve 802; when the movable plate 702 moves downward and drives the cleaning strip brush 3 to brush the filtering part, the airbag 801 is compressed, and the gas in the airbag 801 is squeezed out and 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 blowing hood 10, and the blowing hood 10 blows to the filtering part for cleaning.

[0082] Among them, the hose 805 adopts a spiral design and has a sufficient length to meet the up and down movement of the blowing hood 10.

[0083] The airbag 801 is made of rubber material and is corrugated, and can be deformed and telescoped.

[0084] As Figures 1 - 2 and Figures 12 - 16 As shown in the figure, a filtering part is arranged on the filtering plate 2, and the filtering part is composed of a plurality of filter holes 201 opened on the filtering plate 2 and distributed in a rectangular array. A V-shaped groove 202 is also arranged on the filtering plate 2, and the V-shaped groove 202 is arranged above the filtering part; the cleaning mechanism includes a rotating shaft 15 rotatably installed in the V-shaped groove 202, and a plurality of cleaning rods 1501 are arranged at equal intervals along the length direction of the rotating shaft 15, and a rotating disk 13 is fixedly connected to one end of the rotating shaft 15.

[0085] The cleaning strip brush 3 includes bristles 301, a strip plate 302 and a first permanent magnet 303; the bristles 301 are arranged on the plate surface of the strip plate 302 facing the filtering plate 2, and the first permanent magnet 303 is fixedly installed on the plate surface of the strip plate 302 away from the filtering plate 2; a position adjusting mechanism 12 is arranged at the rear side of the cleaning strip brush 3; the position adjusting mechanism 12 includes an iron bar 1201; the iron bar 1201 is arranged vertically, and the top end of the iron bar 1201 is fixedly connected to the inner wall of the top of the outer frame 1. A second permanent magnet 1202 that attracts the first permanent magnet 303 is arranged on one side below the filtering part, and a third permanent magnet 1203 that repels the first permanent magnet 303 is arranged on one side of the V-shaped groove 202. Both the second permanent magnet 1202 and the third permanent magnet 1203 are fixedly installed on the iron bar 1201.

[0086] A square rod 9032 is fixedly connected to the strip plate 302 of the cleaning strip brush 3. A square hole 9031 is opened at the end of the third end 903. The square rod 9032 is connected with the square hole 9031 in a clearance fit manner. 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.

[0087] As Figures 12 - 14 shown, at this time, the cleaning brush strip 3 is at the lowest position, that is, when the adsorption plate 4 is in the installed state, the cleaning brush strip 3 is below the filtering part. The first permanent magnet 303 is aligned with the second permanent magnet 1202. Through the magnetic attraction force between the two, the cleaning brush strip 3 is separated from the filter plate 2 and does not fit. 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 upward, driving the cleaning brush strip 3 to move upward through the connecting rod 9. The first permanent magnet 303 leaves the second permanent magnet 1202, but the first permanent magnet 303 fits with the iron bar 1201. Through the magnetic attraction force between the first permanent magnet 303 and the iron bar 1201, the separated state of the cleaning brush strip 3 from the filter plate 2 is maintained, so that when the cleaning brush strip 3 moves upward, it does not brush the filtering part until the cleaning brush strip 3 moves to the V-shaped groove 202, that is, moves to the highest position. At this time, the first permanent magnet 303 is aligned with the third permanent magnet 1203. Through the repulsive force between the two, the cleaning brush strip 3 approaches the filter plate 2 and fits.

[0088] After the cleaning brush strip 3 moves to the high position, the cleaning brush strip 3 can be cleaned through the cleaning mechanism to make its bristles 301 clean and ensure the subsequent cleaning effect. Specifically, by rotating the rotating disk 13 to drive the rotating shaft 15 to rotate, thereby driving a plurality of cleaning rods 1501 to rotate. The cleaning rods 1501 move in the V-shaped groove 202 to clean the bristles 301.

[0089] After cleaning, during the installation process of the new adsorption plate 4, the movable plate 702 moves downward, driving the cleaning brush strip 3 to move downward. Since a large distance is generated between the first permanent magnet 303 and the iron bar 1201, the magnetic attraction force between the two decreases, and the cleaning brush strip 3 cannot be separated from the filter plate 2. During the downward movement of the cleaning brush strip 3, the cleaning brush strip 3 brushes the filtering part downward through the bristles 301 for cleaning.

[0090] The present invention is not limited to the above embodiments. No matter what changes are made in its shape or structure, they all fall within the protection scope of the present invention. The protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present 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, the cleaning mechanism being used to clean the cleaning strip brush (3) before use; 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); the movable plate (702) and the bottom inner wall of the outer frame (1) are elastically connected via the second spring (703); a filtering portion is arranged on the filter plate (2); the adsorption plate (4) is in an installed state; the second spring (703) in the elastic pushing mechanism (7) is in a compressed state; the top and bottom surfaces of the movable plate (702) are respectively in contact with the bottom surface of the frame (401) on the adsorption plate (4) and the top surface of the bottom cover (701); when the movable plate (702) is in a high position and moves to a low position, the cleaning brush (3) is driven by the connecting rod (9) to sweep downward on the surface of the filtering portion.

2. The HVAC filter for hospital according to claim 1, 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).

3. The HVAC filter for hospital according to claim 2, 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.

4. The HVAC filter for hospital according to claim 1, 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).

5. 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).

6. The HVAC filter for hospital according to claim 1, 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).

7. The HVAC filter for hospital according to claim 4, characterized in that: The filter portion 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 further 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).

8. The HVAC filter for hospital according to claim 7, 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).

9. The HVAC filter for hospital according to claim 8, 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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