PACU multifunctional protective cover capable of achieving dynamic negative pressure isolation and air purification

Abstract

The invention relates to the field of medical protective equipment and environmental engineering, and discloses a PACU multifunctional protective cover capable of achieving dynamic negative pressure isolation and air purification, the PACU multifunctional protective cover comprises a sickbed, a dome type cover body is fixedly installed at the top of the sickbed through a support, and two operation exchange mechanisms are arranged on one side of the front end of the dome type cover body; a negative pressure exhaust mechanism is fixedly arranged at the bottom end of the sickbed, the operation exchange mechanism comprises a positioning seat, the positioning seat is fixedly installed at the front end of a dome type cover body, a movable ball is movably installed in the middle of the positioning seat, and a through hole is formed in the middle of the movable ball; an outer-layer oversleeve and an inner-layer oversleeve are fixedly mounted on the inner side of the movable ball body, and the outer-layer oversleeve covers the outer side of the inner-layer oversleeve. A dynamic negative pressure isolation space can be rapidly constructed on a standard PACU sickbed, efficient cross infection prevention is achieved through multiple sealing, three-stage purification and closed-loop pressure control, operation flexibility and patient comfort are both considered, deployment is convenient and fast, and nursing quality is guaranteed.

Description

Technical Field

[0001] This invention relates to the fields of medical protective equipment and environmental engineering, specifically to a PACU multifunctional protective cover that can achieve dynamic negative pressure isolation and air purification. Background Technology

[0002] The Post-anesthesia Care Unit (PACU) is a critical location in hospitals for postoperative patient recovery and vital sign monitoring. It receives patients from multiple surgeries, transferring them to regular wards only after their consciousness, respiratory, and circulatory functions have stabilized. Because postoperative patients have temporarily weakened immunity, and PACU spaces are typically compact with densely packed beds, aerosols (containing bacteria, viruses, and other pathogens) generated by patients' breathing and coughing can easily spread through the air. This risk of cross-infection is significantly increased, especially during outbreaks of respiratory infectious diseases such as influenza and COVID-19. Furthermore, frequent procedures performed by PACU staff, such as suctioning, adjusting oxygen lines, and administering intravenous medications, can further exacerbate aerosol dispersal, placing extremely high demands on infection control for both medical staff and patients. Therefore, effective isolation and protection measures to block airborne transmission are urgently needed.

[0003] Currently, PACUs primarily employ two types of isolation methods, both of which have significant shortcomings. One type is traditional screen isolation, which uses metal frames and transparent plastic sheets to create a physical barrier. While this achieves visual separation and initial shielding, it cannot create a completely enclosed space. Aerosols can still freely penetrate the barrier and spread within the PACU, resulting in extremely poor isolation effectiveness. It is only suitable for basic privacy protection for patients with non-infectious diseases. The other type is negative pressure isolation rooms, which use specialized building designs and ventilation systems to create a stable negative pressure, effectively trapping and purifying contaminated air. However, their construction costs are high, requiring large-scale renovations of existing wards. Furthermore, once built, they cannot be moved, resulting in extremely poor flexibility. This makes it difficult to meet the needs of dynamic adjustment of PACU beds and emergency isolation, and is particularly unsuitable for primary hospitals or large hospitals with bed shortages.

[0004] Current technologies fail to balance the effectiveness, flexibility, and economy of PACU isolation: while screen isolation is low-cost and flexible, its protective capacity is insufficient; negative pressure isolation rooms offer good protection but are expensive and lack flexibility. Furthermore, existing isolation solutions generally lack operability—medical staff need to frequently open the isolation barriers during high-frequency procedures such as suctioning and tubing adjustments, easily disrupting the isolation and leading to contaminated air leakage. Therefore, there is an urgent clinical need for a protective device that can be directly adapted to standard PACU beds, is cost-effective, flexibly deployed, and can continuously maintain negative pressure isolation and air purification during medical procedures to fill the technological gap and meet the infection control needs of PACUs in daily operations and public health emergencies. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a multifunctional protective cover for PACUs that can achieve dynamic negative pressure isolation and air purification. It solves the problems of open PACU spaces, high patient density leading to cross-infection, poor isolation of existing screens, high cost and low flexibility of negative pressure isolation rooms, and difficulty in maintaining negative pressure during operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-functional PACU protective cover capable of dynamic negative pressure isolation and air purification, comprising a hospital bed, a dome-shaped cover fixedly mounted on the top of the hospital bed via a bracket, two operation and exchange mechanisms provided on one side of the front end of the dome-shaped cover, and a negative pressure exhaust mechanism fixedly mounted at the bottom end of the hospital bed. Each operation and exchange mechanism includes a positioning seat fixedly mounted on the front end of the dome-shaped cover, a movable ball movably mounted in the center of the positioning seat, a through hole in the center of the movable ball, an outer sleeve and an inner sleeve fixedly mounted on the inner side of the movable ball, with the outer sleeve covering the outer side of the inner sleeve, and a silicone valve glove fixedly mounted at the end of the outer sleeve. The negative pressure exhaust mechanism... The device includes a bellows, which is fixedly installed at the bottom of the hospital bed. An air intake pipe is fixedly installed on one side of the bellows, and the end of the air intake pipe extends into the interior of a dome-shaped enclosure. A flow-limiting mechanism is provided inside the bellows near the air intake pipe. The flow-limiting mechanism includes multiple diverter plates and baffle plates. The diverter plates and baffle plates are evenly arranged in the horizontal and vertical directions inside the bellows. Each diverter plate is fixedly installed on one side of the baffle plate. Each diverter plate has a pointed end at one end and a rounded end at the other end. Each baffle plate has a hook on the side near the rounded end. Each diverter plate has a main flow channel on the side away from the baffle plate. Each diverter plate has a branch channel on the side near the baffle plate. Several ultraviolet sterilization lamps are evenly fixedly installed on the bottom wall of the main flow channel.

[0007] Preferably, a fresh air supply channel is fixedly installed on one side of the dome-shaped cover, and a dust removal filter is fixedly installed inside the fresh air supply channel.

[0008] Preferably, a glass observation window is fixedly installed at the center of the front end of the dome-shaped enclosure, and a control panel is fixedly installed on the other side of the front end of the dome-shaped enclosure.

[0009] Preferably, a sealing curtain is fixedly installed at the middle of the rear end of the dome-shaped cover, and a zipper is fixedly installed at the middle of the sealing curtain.

[0010] Preferably, a micro-pressure sensor is fixedly installed on one side of the inner top of the dome-shaped enclosure, and an infrared thermometer is fixedly installed on the other side of the inner top of the dome-shaped enclosure.

[0011] Preferably, both the outer and inner sleeves are made of ultra-thin, highly elastic medical TPU, and the inner wall of the silicone valve glove is provided with a medical abrasion-resistant layer.

[0012] Preferably, a first inflatable sealing ring is fixedly installed on the side of the outer sleeve and the inner sleeve away from the silicone valve glove, and a second inflatable sealing ring is fixedly installed on the side of the outer sleeve and the inner sleeve close to the silicone valve glove.

[0013] Preferably, a HEPA filter is fixedly installed in the middle of the air box, an activated carbon filter is fixedly installed on the side of the air box near the HEPA filter, a negative pressure fan is fixedly installed on the side of the air box away from the air intake pipe, and an exhaust pipe is fixedly installed at the output end of the negative pressure fan, with the end of the exhaust pipe extending to the outside of the air box.

[0014] This invention provides a multifunctional protective cover for PACUs that can achieve dynamic negative pressure isolation and air purification. It has the following beneficial effects: 1. This invention, through the synergistic effect of the dome-shaped enclosure and the negative pressure exhaust mechanism, creates a stable negative pressure environment inside the enclosure, effectively trapping the polluted air containing aerosols and pathogens exhaled by patients, preventing its spread into the PACU environment, and significantly reducing the risk of cross-infection between patients and between medical staff and patients. The three-stage purification system, consisting of HEPA filters, activated carbon filters, and ultraviolet sterilization lamps, can efficiently intercept and inactivate pathogens in the air, ensuring that the exhaust air is safe and harmless.

[0015] 2. The operating exchange mechanism of this invention adopts a double-layer sleeve design, which, together with the first and second inflatable sealing rings and silicone valve gloves, forms multiple sealing barriers. It can still maintain a negative pressure state when medical staff perform operations such as suctioning and tubing adjustment. The movable ball design makes the operating angle flexible and adjustable, and the ultra-thin, highly elastic medical TPU material ensures the flexibility of operation, solving the problem of inconvenient operation of traditional isolation equipment.

[0016] 3. This invention is equipped with a micro-pressure sensor and an adjustable-power negative pressure fan, forming a closed-loop control system of "monitoring-feedback-adjustment". It can maintain a stable negative pressure environment in both normal and operating states. In operating mode, it automatically increases the fan power and pre-establishes a stronger negative pressure gradient to effectively counteract any minor leaks that may occur during operation and ensure the protection effect. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention; Figure 2 This is a bottom-view perspective view of the present invention; Figure 3 This is a frontal view of the internal structure of the present invention; Figure 4This is a schematic diagram of the operating exchange mechanism in this invention; Figure 5 This is a schematic diagram of the internal structure of the bellows in this invention; Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0018] Among them, 1. Hospital bed; 2. Dome-shaped enclosure; 3. Operating exchange mechanism; 301. Positioning seat; 302. Movable sphere; 303. Through hole; 304. Outer sleeve; 305. Inner sleeve; 306. First inflatable sealing ring; 307. Second inflatable sealing ring; 308. Silicone valve glove; 4. Negative pressure exhaust mechanism; 401. Air box; 402. Air inlet pipe; 403. Flow limiting mechanism; 4031. Diverter plate; 4032. Baffle plate; 4 033. Pointed end; 4034. Round end; 4035. Hook body; 4036. Main flow channel; 4037. Diversion channel; 4038. Ultraviolet sterilization lamp; 404. HEPA filter; 405. Activated carbon filter; 406. Negative pressure fan; 407. Exhaust duct; 5. Fresh air supply channel; 6. Dust filter; 7. Glass observation window; 8. Control panel; 9. Sealing curtain; 10. Zipper; 11. Micro-pressure sensor; 12. Infrared thermometer. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example: Please see the appendix Figure 1 -Appendix Figure 6 This invention provides a multi-functional protective cover for PACUs that can achieve dynamic negative pressure isolation and air purification, such as... Figure 1As shown, the system includes a hospital bed 1, which serves as the foundation for the patient and provides a stable installation platform and usage carrier for the entire PACU, ensuring that the patient can lie comfortably and receive care during isolation. A dome-shaped enclosure 2 is fixedly installed on the top of the hospital bed 1 via a bracket. The dome-shaped enclosure 2 can form a closed isolation space, confining the contaminated air containing aerosols and pathogens exhaled by the patient inside, preventing its spread to the external environment of the PACU, and providing the necessary sealing conditions for establishing a negative pressure environment. Two operation exchange mechanisms 3 are set on one side of the front end of the dome-shaped enclosure 2. The operation exchange mechanisms 3 provide a channel for medical staff to reach into the enclosure to perform nursing operations, ensuring the flexibility of operation while maintaining the airtightness of the enclosure, ensuring that the negative pressure state is not disrupted. A negative pressure exhaust mechanism 4 is fixedly installed at the bottom of the hospital bed 1. The negative pressure exhaust mechanism 4 is the core component for generating negative pressure and purifying contaminated air. It draws air from inside the enclosure to form negative pressure and sterilizes and filters the contaminated air to ensure the safety of the exhaust air. In this embodiment, the operation and exchange mechanism 3 includes a positioning seat 301, which serves to fix and support the movable ball 302, ensuring that the movable ball 302 can move stably and is tightly connected to the dome-shaped cover 2 to avoid air leakage gaps. The positioning seat 301 is fixedly installed at the front end of the dome-shaped cover 2, and the movable ball 302 is movably installed in the middle of the positioning seat 301. The movable ball 302 can rotate flexibly, allowing medical staff to adjust the angle of hand insertion according to operational needs, improving operational convenience and solving the problem of limited operating angle of traditional isolation equipment. A through hole 303 is opened in the middle of the movable ball 302, which allows medical staff to insert their arms. The inner sleeve 305 provides a channel and its size is adapted to the inner sleeve 305 to ensure a seal when the arm is inserted. The outer sleeve 304 and the inner sleeve 305 are fixedly installed on the inside of the movable ball 302, and the outer sleeve 304 covers the outside of the inner sleeve 305. The double sleeve design forms double protection and further enhances the sealing effect, preventing contaminated air from leaking from the sleeve gaps during operation. The end of the outer sleeve 304 is fixedly installed with a silicone valve glove 308. The silicone valve glove 308 has good elasticity and can fit tightly to the arm to form a seal when the medical staff inserts their hand. It can automatically close after the hand is withdrawn to restore the seal and prevent contaminated air from leaking out of the cover. Furthermore, the negative pressure exhaust mechanism 4 includes an air box 401. The air box 401 provides installation space for the various internal purification components and forms a closed cavity for air circulation, ensuring that the polluted air completes the sterilization and filtration process within the air box 401. The air box 401 is fixedly installed at the bottom of the hospital bed 1. An air inlet pipe 402 is fixedly installed on one side of the air box 401, and the end of the air inlet pipe 402 extends into the interior of the dome-shaped hood 2. The air inlet pipe 402 is a channel connecting the dome-shaped hood 2 and the air box 401, allowing the polluted air inside the hood to smoothly enter the air box 401 for treatment. A flow-limiting mechanism 403 is provided inside the air box 401 on the side near the air inlet pipe 402. 403 can slow down the flow rate of polluted air after entering the air box 401, counteracting the acceleration effect of the negative pressure fan 406, so that the air passes through the subsequent purification components at a slow and stable flow rate, improving the sterilization and filtration efficiency. The flow limiting mechanism 403 includes multiple diverter plates 4031 and baffle plates 4032. The diverter plates 4031 and baffle plates 4032 are evenly arranged in the horizontal and vertical directions inside the air box 401. The diverter plates 4031 are all fixedly set on one side of the baffle plates 4032. One end of each diverter plate 4031 is provided with a pointed end 4033. The pointed end 4033 can evenly divide the polluted air entering the flow limiting mechanism 403 into two parts, which are guided to the diversion channel 4037 and the main channel respectively. 4036, to achieve air diversion, each of the diverter plates 4031 has a rounded end 4034 at the other end. The rounded end 4034 reduces airflow resistance and prevents vortices from forming at the end of the diverter plate 4031, ensuring stable airflow. Each of the baffle plates 4032 has a hook 4035 on the side near the rounded end 4034. The hook 4035 changes the airflow direction within the diverter channel 4037, causing the air in the diverter channel 4037 to turn and collide with the air in the main flow channel 4036, thus losing kinetic energy and achieving a deceleration effect. Each of the diverter plates 4031 has a main flow channel 4036 on the side away from the baffle plate 4032. It is the main channel for air flow, and the ultraviolet sterilization lamps 4038 on its bottom wall can sterilize the air in the channel. The diversion plate 4031 is provided with diversion channels 4037 on the side near the baffle plate 4032. The diversion channels 4037 work together with the main channel 4036 to achieve air diversion and collision deceleration, and extend the residence time of air in the flow limiting mechanism 403. Several ultraviolet sterilization lamps 4038 are evenly fixed on the bottom wall of the main channel 4036. The ultraviolet sterilization lamps 4038 can release ultraviolet rays to fully disinfect the polluted air that slowly flows through the main channel 4036, inactivate bacteria, viruses and other pathogens in the air, and prevent germs from being discharged with the air and polluting the environment.

[0021] Furthermore, a fresh air supply channel 5 is fixedly installed on one side of the dome-shaped hood 2. The fresh air supply channel 5 can supply fresh air into the dome-shaped hood 2 to prevent the air inside the hood from being too polluted and causing discomfort to the patient. At the same time, it balances the negative pressure inside the hood to prevent excessive negative pressure from affecting the patient's breathing. A dust filter 6 is fixedly installed inside the fresh air supply channel 5. The dust filter 6 can filter the fresh air entering the hood, remove dust, impurities and other pollutants from the air, ensure that the supplied fresh air is clean, and prevent external pollutants from entering the hood and affecting the patient. Furthermore, a glass observation window 7 is fixedly installed at the center of the front end of the dome-shaped enclosure 2. The glass observation window 7 is made of high-transparency glass, allowing medical staff to observe the patient's facial color, chest rise and fall, and other vital signs at any time without opening the enclosure, reducing the risk of negative pressure damage and contamination caused by frequent opening of the cover. A control panel 8 is fixedly installed on the other side of the front end of the dome-shaped enclosure 2. The control panel 8 is the operation and control center of the equipment. Medical staff can start or switch the equipment mode (such as basic protection mode and operation mode) through the control panel 8, adjust the power of the negative pressure fan 406, and at the same time display the monitoring data of components such as the micro-pressure sensor 11 and the infrared thermometer 12 in real time, so that medical staff can easily grasp the operating status of the equipment and the patient's condition. Furthermore, a sealing curtain 9 is fixedly installed at the middle of the rear end of the dome-shaped cover 2. The sealing curtain 9 has good sealing performance and can be used with the dome-shaped cover 2 to form a complete closed space. At the same time, its material is soft, making it convenient for patients to enter and exit. A zipper 10 is fixedly installed in the middle of the sealing curtain 9. The zipper 10 can realize the opening and closing of the sealing curtain 9. Patients can enter the cover by pulling open the zipper 10, and after lying down, they can pull open the zipper 10 to restore the seal. The operation is convenient and can quickly restore the negative pressure environment inside the cover. Furthermore, a micro-pressure sensor 11 is fixedly installed on one side of the inner top of the dome-shaped enclosure 2. The micro-pressure sensor 11 can monitor the pressure difference between the inside of the dome-shaped enclosure 2 and the external environment of the PACU in real time and transmit the monitoring data to the control panel 8. When the negative pressure value is lower than the set safety threshold, the system can adjust the power of the negative pressure fan 406 in time to ensure the stability of the negative pressure inside the enclosure. An infrared thermometer 12 is fixedly installed on the other side of the inner top of the dome-shaped enclosure 2. The infrared thermometer 12 can monitor the patient's body temperature non-contactly and transmit the body temperature data to the control panel 8 in real time. Medical staff can grasp the patient's body temperature without contacting the patient, reducing operational intervention and lowering the risk of cross-infection. Furthermore, both the outer sleeve 304 and the inner sleeve 305 are made of ultra-thin, highly elastic medical TPU. This material has good elasticity and flexibility, which can not only fit tightly to the medical staff's arm to form a seal, but also not restrict arm movement, ensuring the flexibility of operation. At the same time, the medical TPU material meets hygiene standards and can avoid irritation to patients and medical staff. The inner wall of the silicone valve glove 308 is provided with a medical wear-resistant layer. The wear-resistant layer can enhance the wear resistance of the silicone valve glove 308, extend its service life, and prevent the glove from being damaged due to frequent operation, thus affecting the sealing effect. Furthermore, a first inflatable sealing ring 306 is fixedly installed on the side away from the silicone valve glove 308 between the outer sleeve 304 and the inner sleeve 305, and a second inflatable sealing ring 307 is fixedly installed on the side close to the silicone valve glove 308 between the outer sleeve 304 and the inner sleeve 305. When the medical staff puts their arm into the sleeve, the first inflatable sealing ring 306 and the second inflatable sealing ring 307 can automatically inflate and tightly wrap around the medical staff's forearm, forming two dynamic sealing barriers to further reduce air leakage during operation. Together with the silicone valve glove 308, they form a multi-seal to ensure a stable negative pressure state.

[0022] Furthermore, a HEPA filter 404 is fixedly installed in the center of the air box 401. The HEPA filter 404 has a high-efficiency filtration capacity and can intercept aerosols, fine particles, and most pathogens in the air. An activated carbon filter 405 is fixedly installed inside the air box 401 on the side close to the HEPA filter 404. The activated carbon filter 405 has a strong adsorption capacity and can adsorb odors, harmful gases, and some residual pathogens in the air, further improving the cleanliness of the exhaust air. A negative pressure fan 406 is fixedly installed inside the air box 401 on the side away from the air intake pipe 402. The negative pressure fan 406 is the power source for generating negative pressure. The air source draws air from the air box 401, creating a negative pressure inside the air box 401. Then, air is drawn from the dome-shaped enclosure 2 through the air intake pipe 402, establishing a stable negative pressure environment inside the enclosure. At the same time, the power of the negative pressure fan 406 is adjustable, and the power can be increased in the operation mode to enhance the negative pressure gradient. An exhaust pipe 407 is fixedly installed at the output end of the negative pressure fan 406, and the end of the exhaust pipe 407 extends to the outside of the air box 401. The exhaust pipe 407 discharges clean air filtered by the HEPA filter 404 and the activated carbon filter 405 to the external environment of the PACU, ensuring that the discharged air is safe and harmless and will not cause secondary pollution.

[0023] Working principle: The patient enters the dome-shaped enclosure 2 by unzipping the zipper 10 on the sealed curtain 9 and lies down on the bed 1 to breathe. The exhaled air, which may contain aerosols or pathogens, is confined within the dome-shaped enclosure 2 and cannot diffuse into the external environment. Then, the negative pressure fan 406 is activated, rapidly pumping the air box 401 to a vacuum state. The powerful negative pressure draws air from inside the dome-shaped enclosure 2 into the air box 401 through the intake pipe 402 and finally exhausts it to the outside through the exhaust pipe 407. When there is no medical staff operation, the equipment is in basic protection mode, with the negative pressure fan 406 operating at normal power, continuously drawing the air exhaled by the patient into the air box 401. Because the exhaust velocity is greater than the natural intake velocity, a vacuum is formed inside the enclosure. Compared to the constant negative pressure of the PACU environment, this ensures that contaminated air generated by patients is "confined" within the enclosure and does not escape to the external environment, protecting medical staff and other patients. After entering the airbox 401, the contaminated air first enters the flow-limiting mechanism 403. At this point, the pointed end 4033 of the diverter 4031 splits the air in two, allowing it to flow through the diverter channel 4037 and the main flow channel 4036 respectively. The air entering the diverter channel 4037 is then affected by the hook structure 4035 of the baffle 4032 and turns, encountering the air in the main flow channel 4036. The two collide, resulting in a loss of kinetic energy. Therefore, the contaminated air is continuously slowed down by the flow-limiting mechanism 403, counteracting the acceleration provided by the negative pressure fan 406. The system achieves a rapid effect, maintaining a relatively slow and stable flow rate. At this point, all UV sterilization lamps 4038 are activated to thoroughly disinfect bacteria present in the polluted air, ensuring that pathogens are not released into the external environment. The sterilized polluted air then undergoes dual filtration using HEPA filters 404 and activated carbon filters 405 to efficiently intercept aerosols and viruses, effectively preventing the spread of pathogens between patients and between patients and medical staff. When medical staff need to operate the system, they can activate the operating mode via control panel 8. The system will increase the power of the negative pressure fan 406, pre-establishing a stronger negative pressure gradient to offset any minor leaks that may occur during subsequent operations, reserving "negative pressure redundancy" for operation. Afterwards, medical staff, wearing sterile gloves, will... The hand is inserted into the inner sleeve 305 through the through-hole 303. At this time, the first inflation sealing ring 306 and the second inflation sealing ring 307 automatically inflate, tightly fitting the forearm to form the first seal. The hand continues forward through the silicone valve glove 308 inside the cover. Due to its elasticity, the silicone valve glove 308 fits the arm to form the second seal. Even if there is a tiny gap between the silicone valve glove 308 and the arm, because the negative pressure fan 406 is operating at high power, the high-speed airflow will preferentially draw clean external air into the cover from the gap, rather than allowing contaminated air from inside the cover to leak out. The contaminated air is always confined inside the cover and is discharged after being filtered and sterilized by the air box 401. After the operation is completed, the medical staff withdraws the hand, and the silicone valve glove 308 automatically closes due to its elasticity, restoring the seal.After the arm is fully withdrawn from the inner sleeve 305, the two inflatable sealing rings 306 and 307 automatically release air and pressure. The system automatically adjusts the power of the negative pressure fan 406 back to normal levels, and the equipment returns to the static negative pressure maintenance mode. Throughout the process, the micro-pressure sensor 11 monitors the negative pressure value inside the shroud in real time, forming a closed-loop control of "monitoring-feedback-adjustment".

[0024] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-functional protective cover for a PACU (Patient Care Unit) capable of dynamic negative pressure isolation and air purification, comprising a hospital bed (1), characterized in that, The top of the hospital bed (1) is fixedly installed with a dome-shaped cover (2) by a bracket. Two operation and exchange mechanisms (3) are provided on one side of the front end of the dome-shaped cover (2). A negative pressure exhaust mechanism (4) is fixedly installed at the bottom of the hospital bed (1). The operation exchange mechanism (3) includes a positioning seat (301), which is fixedly installed at the front end of the dome-shaped cover (2). A movable ball (302) is movably installed in the middle of the positioning seat (301). A through hole (303) is opened in the middle of the movable ball (302). An outer sleeve (304) and an inner sleeve (305) are fixedly installed on the inner side of the movable ball (302), and the outer sleeve (304) covers the outer side of the inner sleeve (305). A silicone valve glove (308) is fixedly installed at the end of the outer sleeve (304). The negative pressure exhaust mechanism (4) includes a bellows (401), which is fixedly installed at the bottom of the hospital bed (1). An air inlet pipe (402) is fixedly installed on one side of the bellows (401), and the end of the air inlet pipe (402) extends into the interior of the dome-shaped enclosure (2). A flow limiting mechanism (403) is provided inside the bellows (401) on the side near the air inlet pipe (402). The flow limiting mechanism (403) includes multiple diverter plates (4031) and flow baffles (4032). The diverter plates (4031) and flow baffles (4032) are evenly arranged inside the bellows (401) in both horizontal and vertical directions. The flow divider (4031) is fixedly installed on one side of the baffle plate (4032). One end of each flow divider (4031) is provided with a pointed end (4033), and the other end of each flow divider (4031) is provided with a rounded end (4034). The side of the baffle plate (4032) near the rounded end (4034) is provided with a hook (4035). The side of the flow divider (4031) away from the baffle plate (4032) is provided with a main flow channel (4036). The side of the flow divider (4031) near the baffle plate (4032) is provided with a flow divider channel (4037). Several ultraviolet sterilization lamps (4038) are uniformly fixedly installed on the bottom wall of the main flow channel (4036).

2. The PACU multifunctional protective cover capable of dynamic negative pressure isolation and air purification according to claim 1, characterized in that, A fresh air supply channel (5) is fixedly installed on one side of the dome-shaped cover (2), and a dust removal filter (6) is fixedly installed inside the fresh air supply channel (5).

3. The PACU multifunctional protective cover capable of dynamic negative pressure isolation and air purification according to claim 1, characterized in that, A glass observation window (7) is fixedly installed at the middle of the front end of the dome-shaped enclosure (2), and a control panel (8) is fixedly installed on the other side of the front end of the dome-shaped enclosure (2).

4. A PACU multifunctional protective cover capable of dynamic negative pressure isolation and air purification according to claim 3, characterized in that, A sealing curtain (9) is fixedly installed at the middle of the rear end of the dome-shaped cover (2), and a zipper (10) is fixedly installed at the middle of the sealing curtain (9).

5. A PACU multifunctional protective cover capable of dynamic negative pressure isolation and air purification according to claim 1, characterized in that, A micro-pressure sensor (11) is fixedly installed on one side of the inner top of the dome-shaped cover (2), and an infrared thermometer (12) is fixedly installed on the other side of the inner top of the dome-shaped cover (2).

6. A PACU multifunctional protective cover capable of dynamic negative pressure isolation and air purification according to claim 1, characterized in that, The outer sleeve (304) and inner sleeve (305) are both made of ultra-thin, highly elastic medical TPU, and the inner wall of the silicone valve glove (308) is provided with a medical wear-resistant layer.

7. A PACU multifunctional protective cover capable of dynamic negative pressure isolation and air purification according to claim 1, characterized in that, A first inflatable sealing ring (306) is fixedly installed between the outer sleeve (304) and the inner sleeve (305) on the side away from the silicone valve glove (308), and a second inflatable sealing ring (307) is fixedly installed between the outer sleeve (304) and the inner sleeve (305) on the side close to the silicone valve glove (308).

8. A PACU multifunctional protective cover capable of dynamic negative pressure isolation and air purification according to claim 1, characterized in that, A HEPA filter (404) is fixedly installed in the middle of the air box (401). An activated carbon filter (405) is fixedly installed on the side of the air box (401) near the HEPA filter (404). A negative pressure fan (406) is fixedly installed on the side of the air box (401) away from the air intake pipe (402). An exhaust pipe (407) is fixedly installed at the output end of the negative pressure fan (406), and the end of the exhaust pipe (407) extends to the outside of the air box (401).

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