Negative pressure room purifying ventilation device

Abstract

The utility model discloses a negative pressure sickroom purification air exchange device, specifically related to negative pressure sickroom purification air exchange technical field, including cylinder, one end of cylinder extends to the inside of negative pressure sickroom and is fixedly connected with the air extraction cover, and the inner chamber of air extraction cover is embedded with the perforated plate, and the top of air extraction cover is provided with pressure sensor and air quality sensor. The utility model discloses first through the cooperation of the filter screen board, fine fiber filter screen board, activated carbon adsorption board and ultraviolet lamp tube of setting, can purify air comprehensively, effectively removes various pollutants in air, ensures that the air clean and safe of discharge sickroom, reduces the cross infection risk, through the air pressure real -time monitoring in sickroom of setting up multiple fan and combining pressure sensor, can control air extraction and delivery capacity, maintains the stable of sickroom negative pressure, and through quick detachable locking mechanism can be convenient and fast to the square frame installation fixed and disassembly cleaning use, need not the help of external tool can complete installation split.

Description

Technical Field

[0001] This utility model relates to the field of negative pressure ward purification and ventilation technology, and more specifically, to a negative pressure ward purification and ventilation device. Background Technology

[0002] Negative pressure isolation wards are important medical facilities for treating patients with infectious diseases. Through a special ventilation system, the air pressure inside the ward is lower than the outside atmospheric pressure, creating directional airflow and preventing contaminated air from leaking out, thus avoiding the spread of germs to other areas. During the operation of negative pressure isolation wards, the purification and ventilation device plays a key role. It needs to maintain a negative pressure environment while efficiently filtering and purifying the air, removing germs, harmful particles and other pollutants from the air. The purification and ventilation device is the key equipment for maintaining the normal operation of negative pressure isolation wards, and its performance directly affects the air quality and the isolation effect of germs in the ward.

[0003] Existing negative pressure ward purification and ventilation devices have significant drawbacks. In terms of purification, they use simple filters, which are insufficient to effectively intercept tiny bacteria, viral aerosols, and some harmful chemicals. With increased use, the filters are prone to clogging, leading to increased ventilation resistance and reduced airflow. This not only affects ventilation efficiency but may also cause some pollutants to remain and circulate in the ward due to insufficient filtration, increasing the risk of cross-infection. Furthermore, filter installation and removal often require multiple tools, consuming a lot of time and manpower, which affects work efficiency. Therefore, a new negative pressure ward purification and ventilation device is proposed. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a negative pressure ward purification and ventilation device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a negative pressure ward purification and ventilation device, comprising a cylinder, one end of which extends into the interior of the negative pressure ward and is fixedly connected to an exhaust hood. The exhaust hood increases the air extraction area, allowing air in the ward to enter the device more smoothly. The inner cavity of the exhaust hood is embedded with a perforated plate, which plays a role in preliminary filtration and uniform airflow, preventing large particles of debris from directly entering the device, while also ensuring uniform air dispersion and avoiding excessive local airflow from affecting subsequent purification processes. A pressure sensor and an air quality sensor are installed on the top of the exhaust hood. The pressure sensor monitors the air pressure in the negative pressure ward in real time, while the air quality sensor detects the quality of the extracted air, including indicators such as the concentration of pathogens and the content of harmful gases. From top to bottom, a first fan, a second fan, and a third fan are sequentially arranged on the side of the inner cavity of the cylinder away from the exhaust hood. By controlling the number of fans turned on, the exhaust volume can be controlled, thereby facilitating the control of the negative pressure environment in the ward and the adjustment of the exhaust volume.

[0006] A square frame is inserted at the top of the cylinder. Multiple ultraviolet lamps are installed inside the cylinder, between the square frame and the first fan. When air passes through, they emit ultraviolet light of a specific wavelength, destroying the nucleic acid structure of bacteria and viruses, rendering them inactive, thus sterilizing and disinfecting the air, further improving air purification, and reducing the risk of cross-infection. A control box is located at the bottom of the cylinder near the first fan. From left to right, the middle of the square frame contains a filter screen, a fine fiber filter screen, and an activated carbon adsorption plate. The filter screen serves as the primary filtration layer, intercepting larger dust particles, hair, and other particles in the air. The fine fiber filter screen, through its dense fiber structure, filters out smaller dust particles and some bacteria. The activated carbon adsorption plate utilizes the adsorption properties of activated carbon to remove harmful chemicals, odors, and residual micro-bacteria and viruses from the air. This three-layer filtration structure provides progressive purification of the air.

[0007] A sealing top plate is fixedly connected to the top of the frame. The top of the sealing top plate is equipped with a quick-release locking mechanism, which facilitates the quick removal and replacement of the frame for easy cleaning. A return air pipe is fixedly connected to the side of the cylinder near the first fan, corresponding to the position of the first fan. Through the return air pipe, part of the purified gas can be returned to the ward to maintain a stable negative pressure environment in the ward.

[0008] Preferably, one end of the return air pipe is connected to the interior of the negative pressure ward. The end of the return air pipe near the negative pressure ward and the position of the exhaust hood are respectively set on both sides of the negative pressure ward. Through the return air pipe, part of the purified gas can be returned to the ward to maintain a stable negative pressure environment in the ward, replenish fresh air, maintain air flow and a stable negative pressure environment in the ward, and at the same time ensure that the purified air can be evenly distributed in the ward.

[0009] Preferably, a baffle is fixedly connected to the middle of the frame, and the fine fiber filter plate and the activated carbon adsorption plate are respectively arranged on both sides of the baffle. The filter plate is embedded in the middle of the side of the frame near the exhaust hood, and the installation of the fine fiber filter plate and the activated carbon adsorption plate is limited by the baffle.

[0010] Preferably, the inner cavity of the cylinder is provided with a sealing groove, and the three sides of the square frame are fixedly connected with sealing blocks that are adapted to the sealing groove. The sealing blocks are set in the middle of the sealing groove. Through the cooperation of the sealing groove and the sealing blocks, the installation of the square frame can be sealed to form a good sealing effect and prevent the leakage of unpurified air.

[0011] Preferably, the quick-release locking mechanism includes movable plates disposed on both sides of the top of the sealing top plate, the top of the sealing top plate is provided with multiple limiting grooves, a rotating worm gear is inserted into the center of the top of the sealing top plate, and multiple locking boxes are symmetrically fixedly connected to the top of the cylinder on both sides of the sealing top plate.

[0012] Preferably, a locking block is fixedly connected to one side of the movable plate at a position corresponding to the locking box, and a limiting slider adapted to the limiting groove is fixedly connected to the bottom of the movable plate, the limiting slider being disposed in the middle of the limiting groove.

[0013] Preferably, a limiting plate is fixedly connected to the bottom end of the rotating worm gear, and a turntable is fixedly connected to the top of the rotating worm gear. A turbine is provided on one side of the rotating worm gear, and threaded rods are symmetrically fixedly connected to both sides of the turbine. One end of the threaded rod extends to the middle of the moving plate and is threadedly connected to the moving plate. Rotating the turntable drives the rotating worm gear to rotate and mesh with the turbine, causing the threaded rods on both sides of the turbine to rotate. This can control the two moving plates to move to opposite sides, thereby allowing the locking block to be inserted into the opening on one side of the locking box to limit the movement of the moving plates, thus completing the fixed installation of the sealing top plate. Reverse rotation of the turntable facilitates the disassembly of the sealing top plate, greatly simplifying the filter replacement process and reducing maintenance difficulty and time costs.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. This utility model firstly uses a combination of filter screen, fine fiber filter screen, activated carbon adsorption plate and ultraviolet lamp tube to comprehensively purify the air, effectively remove various pollutants in the air, ensure that the air discharged from the ward is clean and safe, and reduce the risk of cross-infection. By setting multiple fans and combining them with pressure sensors to monitor the air pressure in the ward in real time, the number of fans to be started can be controlled through the control box, thereby controlling the air extraction and delivery volume, maintaining the negative pressure stability of the ward. The quick-release locking mechanism allows for convenient and quick installation, fixing and disassembly for cleaning and use of the frame. Maintenance personnel can operate quickly and safely without the need for external tools to complete the installation and disassembly.

[0016] 2. This utility model also uses a return air pipe to return some of the purified gas to the ward, maintaining a stable negative pressure environment in the ward, replenishing fresh air, maintaining airflow and a stable negative pressure environment in the ward, and ensuring that the purified air can be evenly distributed in the ward. Through the cooperation of the sealing slot and sealing block, the installation of the frame can be sealed to form a good sealing effect and prevent the leakage of unpurified air. The quality of the extracted air is detected by an air quality sensor, including indicators such as the concentration of bacteria and the content of harmful gases. The perforated plate plays a role in preliminary filtration and uniform airflow, preventing large particles of debris from directly entering the device.

[0017] In summary, through the interaction of the above-mentioned multiple functions, the air can be comprehensively purified, various pollutants in the air can be effectively removed, the air discharged from the ward can be ensured to be clean and safe, the risk of cross-infection can be reduced, the air extraction and delivery volume can be controlled, the negative pressure in the ward can be maintained stably, and the filter screen can be quickly and safely disassembled and cleaned. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the cylindrical body of this utility model.

[0020] Figure 3 This is a schematic diagram of the split cross-sectional structure of the cylindrical body and the square frame of this utility model.

[0021] Figure 4 This is a schematic diagram of the split cross-sectional structure of the square frame of this utility model.

[0022] Figure 5 This is a schematic diagram showing the disassembled structure of the movable plate and rotating worm gear of this utility model.

[0023] The attached diagram is labeled as follows: 1. Cylinder; 2. Exhaust hood; 3. Perforated plate; 4. First fan; 5. Second fan; 6. Third fan; 7. Control box; 8. Frame; 9. Sealed top plate; 10. Ultraviolet lamp; 11. Baffle; 12. Filter screen; 13. Fine fiber filter screen; 14. Activated carbon adsorption plate; 15. Pressure sensor; 16. Air quality sensor; 17. Return pipe; 18. Sealing slot; 19. Locking box; 20. Moving plate; 21. Limiting slider; 22. Limiting groove; 23. Locking block; 24. Rotating worm gear; 25. Limiting plate; 26. Turntable; 27. Turbine; 28. Threaded rod. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] As attached Figure 1-5The negative pressure ward purification and ventilation device shown includes a cylinder 1. One end of the cylinder 1 extends into the negative pressure ward and is fixedly connected to an exhaust hood 2. The exhaust hood 2 increases the air extraction area, allowing air in the ward to enter the device more smoothly. The inner cavity of the exhaust hood 2 is embedded with a perforated plate 3, which plays a role in preliminary filtration and uniform airflow, preventing large particles of debris from directly entering the device. At the same time, it makes the air evenly dispersed, avoiding excessive local airflow from affecting the subsequent purification process. The top of the exhaust hood 2 is equipped with a pressure sensor 15 and an air quality sensor 16. The pressure sensor 15 monitors the air pressure in the negative pressure ward in real time, while the air quality sensor 16 detects the quality of the extracted air, including indicators such as the concentration of bacteria and the content of harmful gases. The inner cavity of the cylinder 1 away from the exhaust hood 2 is equipped with a first fan 4, a second fan 5, and a third fan 6 from top to bottom. By controlling the number of fans turned on, the exhaust volume can be controlled, thereby facilitating the control of the negative pressure environment in the ward and the adjustment of the exhaust volume.

[0026] A square frame 8 is inserted at the top of the cylinder 1. Multiple ultraviolet lamps 10 are installed in the inner cavity of the cylinder 1 between the square frame 8 and the first fan 4. When air passes through, they emit ultraviolet rays of a specific wavelength to destroy the nucleic acid structure of bacteria and viruses, rendering them inactive and achieving sterilization and disinfection of the air. This further improves the air purification effect and reduces the risk of cross-infection. A control box 7 is installed at the bottom of the cylinder 1 near the first fan 4. From left to right, the middle of the square frame 8 is provided with a filter screen 12, a fine fiber filter screen 13, and an activated carbon adsorption plate 14. The filter screen 12 serves as the primary filter layer, which can intercept larger dust, hair, and other particles in the air. The fine fiber filter screen 13 filters out smaller dust particles and some bacteria through its dense fiber structure. The activated carbon adsorption plate 14 utilizes the adsorption properties of activated carbon to remove harmful chemicals, odors, and residual tiny bacteria and viruses from the air. The three-layer filtration structure is progressive, achieving deep air purification.

[0027] A sealing top plate 9 is fixedly connected to the top of the frame 8. The top of the sealing top plate 9 is equipped with a quick-release locking mechanism, which facilitates the quick removal and replacement of the frame 8 for easy cleaning. A return air pipe 17 is fixedly connected to the side of the cylinder 1 closest to the first fan 4 and at the position corresponding to the first fan 4. Through the return air pipe 17, part of the purified gas can be returned to the ward to maintain a stable negative pressure environment in the ward.

[0028] As attached Figure 1-4As shown, one end of the return air pipe 17 is connected to the interior of the negative pressure ward. The end of the return air pipe 17 near the negative pressure ward and the position of the extraction hood 2 are respectively set on both sides of the negative pressure ward. A baffle 11 is fixedly connected to the middle of the frame 8. The fine fiber filter plate 13 and the activated carbon adsorption plate 14 are respectively set on both sides of the baffle 11. The filter plate 12 is embedded in the middle of the side of the frame 8 near the extraction hood 2. A sealing groove 18 is opened in the inner cavity of the cylinder 1. Sealing blocks that are compatible with the sealing groove 18 are fixedly connected to three sides of the frame 8. In the middle of the sealing slot 18, part of the purified gas can be returned to the ward through the return air pipe 17 to maintain a stable negative pressure environment in the ward, replenish fresh air, maintain air flow and a stable negative pressure environment in the ward, and at the same time ensure that the purified air can be evenly distributed in the ward. The baffle 11 limits the installation of the fine fiber filter plate 13 and the activated carbon adsorption plate 14. Through the cooperation of the sealing slot 18 and the sealing block, the installation of the frame 8 can be sealed to form a good sealing effect and prevent the leakage of unpurified air.

[0029] As attached Figure 1-5 As shown, the quick-release locking mechanism includes movable plates 20 disposed on both sides of the top of the sealing top plate 9. Multiple limiting grooves 22 are provided on the top of the sealing top plate 9. A rotating worm gear 24 is inserted into the center of the top of the sealing top plate 9. Multiple locking boxes 19 are symmetrically fixedly connected to the top of the cylinder 1 on both sides of the sealing top plate 9. A locking block 23 is fixedly connected to one side of the movable plate 20 at a position corresponding to the locking box 19. A limiting slider 21 adapted to the limiting groove 22 is fixedly connected to the bottom of the movable plate 20. The limiting slider 21 is located in the middle of the limiting groove 22. A limiting plate 25 is fixedly connected to the bottom end of the rotating worm gear 24, and a turntable 26 is fixedly connected to the top of the rotating worm gear 24. A turbine 27 is provided on one side of the moving worm 24. Threaded rods 28 are symmetrically fixedly connected to both sides of the turbine 27. One end of the threaded rod 28 extends to the middle of the moving plate 20 and is threadedly connected to the moving plate 20. Rotating the turntable 26 drives the rotating worm 24 to rotate, meshing with the turbine 27, causing the threaded rods 28 on both sides of the turbine 27 to rotate. This controls the two moving plates 20 to move to opposite sides, thereby allowing the locking block 23 to be inserted into the opening on one side of the locking box 19 to limit the movement of the moving plate 20, thus completing the fixed installation of the sealing top plate 9. Reverse rotation of the turntable 26 facilitates the disassembly of the sealing top plate 9, greatly simplifying the filter replacement process and reducing maintenance difficulty and time costs.

[0030] The working principle of this utility model is as follows: When in use, the pressure sensor 15 monitors the air pressure in the ward in real time and transmits the data to the control box 7. The control box 7 automatically adjusts the speed of the first fan 4, the second fan 5, and the third fan 6 according to the set negative pressure value, controls the air extraction and delivery volume, and maintains the negative pressure in the ward.

[0031] Meanwhile, the air quality sensor 16 continuously monitors the quality of the extracted air. When the air quality is found to be substandard, the control box 7 automatically activates the ultraviolet lamp 10 for sterilization and disinfection, and adjusts the fan speed according to the degree of pollution to increase air purification and ventilation. The purified air is returned to the ward through the return air pipe 17 under the action of the fan, completing the air circulation.

[0032] When the filter screen needs to be replaced, rotate the turntable 26 to pull out the locking block 23 of the quick-release locking mechanism from the locking box 19, release the lock of the square frame 8, remove the square frame 8 from the top of the cylinder 1, and disassemble and replace the filter screen plate 12, the fine fiber filter screen plate 13, and the activated carbon adsorption plate 14 in sequence.

[0033] After the replacement is completed, insert the square frame 8 back into the cylinder 1, rotate the turntable 26 to insert the locking block 23 into the inside of the locking box 19 in sequence, and lock the square frame 8 to complete the process.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A negative pressure ward purification and ventilation device, comprising a cylinder (1), characterized in that: One end of the cylinder (1) extends into the negative pressure ward and is fixedly connected to an air extraction hood (2). The inner cavity of the air extraction hood (2) is fitted with a perforated plate (3). A pressure sensor (15) and an air quality sensor (16) are provided on the top of the air extraction hood (2). A first fan (4), a second fan (5), and a third fan (6) are arranged sequentially from top to bottom on the side of the inner cavity of the cylinder (1) away from the air extraction hood (2). A square frame (8) is inserted at the top of the cylinder (1). Multiple ultraviolet lamps (10) are arranged in the inner cavity of the cylinder (1) between the square frame (8) and the first fan (4). A control box (7) is arranged at the bottom of the cylinder (1) near the first fan (4). A filter screen plate (12), a fine fiber filter screen plate (13), and an activated carbon adsorption plate (14) are arranged in the middle of the square frame (8) from left to right. A sealing top plate (9) is fixedly connected to the top of the frame (8). A quick-release locking mechanism is provided on the top of the sealing top plate (9). A return air pipe (17) is fixedly connected to the side of the cylinder (1) near the first fan (4) at a position corresponding to the first fan (4).

2. The negative pressure ward purification and ventilation device according to claim 1, characterized in that: One end of the return air pipe (17) is connected to the inside of the negative pressure ward. The end of the return air pipe (17) near the negative pressure ward and the position of the air extraction hood (2) are respectively set on both sides of the negative pressure ward.

3. The negative pressure ward purification and ventilation device according to claim 1, characterized in that: A baffle (11) is fixedly connected to the middle of the frame (8). The fine fiber filter plate (13) and the activated carbon adsorption plate (14) are respectively arranged on both sides of the baffle (11). The filter plate (12) is embedded in the middle of the side of the frame (8) near the exhaust hood (2).

4. The negative pressure ward purification and ventilation device according to claim 1, characterized in that: The inner cavity of the cylinder (1) is provided with a sealing groove (18), and the three sides of the frame (8) are fixedly connected with sealing blocks that are compatible with the sealing groove (18). The sealing blocks are located in the middle of the sealing groove (18).

5. The negative pressure ward purification and ventilation device according to claim 1, characterized in that: The quick-release locking mechanism includes movable plates (20) set on both sides of the top of the sealing top plate (9), multiple limiting grooves (22) are opened on the top of the sealing top plate (9), a rotating worm gear (24) is inserted in the center of the top of the sealing top plate (9), and multiple locking boxes (19) are symmetrically fixedly connected on both sides of the top of the cylinder (1) located on the sealing top plate (9).

6. The negative pressure ward purification and ventilation device according to claim 1, characterized in that: A locking plug (23) is fixedly connected to one side of the movable plate (20) at a position corresponding to the locking box (19). A limiting slider (21) adapted to the limiting slide groove (22) is fixedly connected to the bottom of the movable plate (20). The limiting slider (21) is located in the middle of the limiting slide groove (22).

7. The negative pressure ward purification and ventilation device according to claim 1, characterized in that: A limiting disk (25) is fixedly connected to the bottom end of the rotating worm (24), and a turntable (26) is fixedly connected to the top of the rotating worm (24). A turbine (27) is provided on one side of the rotating worm (24), and threaded rods (28) are symmetrically fixedly connected to both sides of the turbine (27). One end of the threaded rod (28) extends to the middle of the moving plate (20) and is threadedly connected to the moving plate (20).

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