Negative pressure isolation box

Abstract

The utility model discloses a negative pressure isolation box, which aims to realize safe isolation and compliant emission of pollutants, comprising an isolation box body, a turnover cover plate arranged on the top of the box body, a control device and an operation window with elastic rubber gloves embedded on the front face; negative pressure, temperature and pollutant concentration sensors and a data acquisition module are arranged on the inner wall of the box, a negative pressure production assembly is connected to the rear side, universal wheels are arranged on the bottom, the negative pressure production assembly comprises a main / standby fan and an air outlet pipe with an activated carbon filter module, sensor data is transmitted to the control device through the acquisition module, and real-time monitoring of negative pressure and temperature and abnormal alarm are realized; the standby fan ensures stable operation, and the filter module adsorbs pollutants. The overall structure is compact and convenient to move, is suitable for temporary isolation in medical and other scenes, and has high safety and practicality.

Description

Technical Field

[0001] This utility model relates to the field of medical testing equipment technology, specifically to a negative pressure isolation box for medical testing departments, suitable for scenarios such as pathogen microorganism sample processing, infectious disease patient specimen testing, and high-risk biological sample handling. Background Technology

[0002] The existing isolation equipment used in medical laboratories has the following shortcomings: First, traditional bio-isolation chambers rely solely on a single fan for air extraction. When the equipment has been used for a long time, the seals may age, or there may be significant pressure fluctuations within the chamber, easily leading to negative pressure failure and leakage of contaminants, posing a serious health threat to the surrounding environment and personnel. Regarding portability and ease of use, traditional isolation chambers are typically bulky and heavy, lacking specialized portable support structures. This often requires multiple people to work together during transport, wasting manpower and reducing efficiency. Furthermore, the sealing design of the operating window inside the chamber is rudimentary, significantly increasing the risk of medical staff coming into contact with contaminants during operation. Functionally, most existing isolation chambers only provide basic isolation functions and cannot monitor key parameters such as negative pressure, temperature, and contaminant concentration in real time. Moreover, they lack emergency air replenishment devices, which can adversely affect the respiratory safety of patients in extreme situations, such as excessive negative pressure, failing to meet the higher requirements for safety and functionality of isolation equipment in medical settings.

[0003] Therefore, a negative pressure isolation chamber needs to be designed to solve the problems mentioned above. Utility Model Content

[0004] The purpose of this utility model is to provide a negative pressure isolation box with reasonable structure, convenient operation and high safety. By optimizing the box structure design, improving the negative pressure generation system and integrating multi-parameter monitoring functions, it solves the shortcomings of existing isolation equipment in terms of sealing performance, operational safety and usage flexibility, and meets the needs of medical isolation scenarios for negative pressure environment stability, convenient operation and controllable status.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A negative pressure isolation box includes an isolation box body with a flip-top cover connected to the top of the isolation box body. The flip-top cover allows the interior of the box body to be opened and closed for easy placement or removal of items. The front of the isolation box body is provided with a control device and an operating window. The control device is used to control the operation of the equipment and display parameters. The operating window allows the operator to reach inside the box to operate the equipment. An elastic rubber glove is connected to the end of the operating window inside the isolation box body, allowing the operator to operate the equipment inside the box without compromising its airtightness.

[0007] Furthermore, the inner wall of the isolation chamber is also equipped with a negative pressure sensor, a temperature sensor, a pollutant concentration sensor, and a data acquisition module. The negative pressure sensor is used to monitor the negative pressure value inside the chamber in real time, the temperature sensor is used to monitor the temperature inside the chamber, the pollutant concentration sensor is used to monitor the concentration of pollutants inside the chamber, and the data acquisition module is used to collect the parameter information detected by each sensor.

[0008] Furthermore, the rear of the isolation box is connected to a negative pressure production component, which can create a stable negative pressure environment inside the isolation box; casters are fixedly installed at the four corners of the bottom of the isolation box to facilitate the movement and transfer of the equipment.

[0009] Furthermore, the negative pressure production component includes a main fan and a backup fan fixedly installed at the rear of the isolation chamber. The main fan serves as the primary negative pressure generating device, while the backup fan can be activated in case the main fan fails, ensuring a continuous and stable negative pressure environment. The main fan and the backup fan are connected to the internal cavity of the isolation chamber via exhaust pipes. Air is extracted from the chamber through the exhaust pipes to create negative pressure. The exhaust pipes and the isolation chamber are sealed with sealant to ensure the chamber's sealing performance and prevent gas leakage.

[0010] Furthermore, the end of the air outlet pipe is equipped with an activated carbon filter module inside the isolation chamber. When air is extracted from the chamber, the air is filtered through the activated carbon filter module to adsorb pollutants discharged from the isolation chamber and prevent pollutants from polluting the external environment.

[0011] Furthermore, the shorter sides of the isolation box are equipped with handles, which are connected to the isolation box by hinges. When the equipment needs to be moved, the handles can be turned out for easy carrying by the operator. When not in use, they can be rotated to fit against the side of the box to reduce space occupation.

[0012] Furthermore, one side of the flip cover is connected to the isolation box via a hinge, allowing the flip cover to rotate around the hinge to open or close. The other side is locked to the isolation box via a latch, which locks the flip cover in place after it is closed, ensuring a tight seal between the cover and the box. Handles are also fixedly installed on both sides of the shorter side of the flip cover, making it easy for operators to open or close the flip cover.

[0013] Furthermore, the elastic rubber glove is connected to the edge of the operating window by heat-sealing. This connection method ensures the airtightness between the elastic rubber glove and the operating window, prevents gas leakage from the box through the connection, and ensures the operator's flexibility.

[0014] Furthermore, the negative pressure sensor, temperature sensor, pollutant concentration sensor, and data acquisition module are electrically connected to each other, and each sensor transmits the detected parameter information to the data acquisition module. The output of the data acquisition module is electrically connected to the input of the control device, and the data acquisition module transmits the processed parameter information to the control device. The control device includes a display screen for displaying parameters inside the chamber and operation buttons. The display screen can display parameters such as negative pressure, temperature, and pollutant concentration inside the chamber in real time. Operators can set operating parameters and control the equipment through the operation buttons.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model, through the design of a negative pressure isolation box, achieves the following effects: 1. The negative pressure generation structure employs a main fan and a backup fan. When the main fan fails, the backup fan can start promptly, effectively preventing negative pressure failure due to a single fan malfunction. Simultaneously, the outlet pipe and the isolation box are sealed with a sealing component, further enhancing the box's airtightness, ensuring a stable negative pressure environment, and reducing the risk of contaminant leakage. 2. Universal wheels installed at the four corners of the isolation box allow for easy movement during transport, eliminating the need for multiple personnel and improving transport efficiency. The elastic rubber gloves at the operating window are heat-sealed, ensuring both the flexibility of medical personnel and effectively preventing contaminant leakage, thus enhancing operational safety. 3. The system integrates a negative pressure sensor, a temperature sensor, a contaminant concentration sensor, a data acquisition module, and a control device. It can monitor parameters such as negative pressure, temperature, and contaminant concentration within the box in real time, displaying these parameters on the control device's screen for convenient monitoring of the box's internal conditions by medical personnel. When parameters become abnormal, corresponding measures can be taken in a timely manner, ensuring the safety of patients and medical staff and meeting the multi-functional needs of isolation equipment in medical scenarios. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0018] Figure 2 This utility model Figure 1 Front view structural diagram;

[0019] Figure 3 This utility model Figure 1 A schematic diagram of the rear view structure;

[0020] Figure 4 This utility model Figure 1 A top-down view of the internal structure.

[0021] In the diagram: 1. Isolation chamber; 2. Flip-top cover; 3. Control device; 4. Operating window; 5. Elastic rubber gloves; 6. Negative pressure sensor; 7. Temperature sensor; 8. Pollutant concentration sensor; 9. Data acquisition module; 10. Negative pressure production component; 101. Main fan; 102. Backup fan; 103. Air outlet pipe; 104. Activated carbon filter module; 11. Casters; 13. Connecting hinge; 12. Chamber handle; 14. Lock; 15. Cover handle. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are provided. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0024] Example 1

[0025] Please see Figure 1This embodiment provides a basic negative pressure isolation box. The isolation box body 1 is made of 304 stainless steel to ensure sufficient structural strength and corrosion resistance. A flip-top cover 2 is provided on the top of the isolation box body 1. The size of the flip-top cover 2 matches the top opening of the box body, and the cover material is the same as that of the isolation box body 1. One side of the flip-top cover 2 is rotatably connected to the isolation box body 1 via a connecting hinge 13. The connecting hinge 13 is a stainless steel hinge, and each hinge has a load-bearing capacity of not less than 50kg. Two hinges are provided and symmetrically distributed along the edge of the cover. The other side of the flip-top cover 2 is locked and fixed to the isolation box body 1 via a latch 14. The latch 14 is a push-button stainless steel lock with an anti-loosening structure to ensure the airtightness of the box body after the cover is closed. To facilitate the opening and closing of the flip-top cover 2, a cover handle 15 is fixedly installed on each side of the shorter side of the flip-top cover 2. The cover handle 15 is a U-shaped stainless steel structure with a brushed finish to avoid hand scratches. The handle is fixed to the cover by welding, and the weld is polished and sealed.

[0026] Example 2

[0027] Please see Figure 1 , Figure 2 as well as Figure 4 This embodiment, based on embodiment 1, further specifies that the control device 3 and operation window 4 are embedded in the front of the isolation box 1: the control device 3 is located on the upper part of the front of the box, using an embedded installation method, flush with the surface of the box. The control device 3 includes a 10.1-inch LCD screen (1920×1080 resolution) and 6 physical operation buttons (corresponding to the functions of "power on / off", "negative pressure adjustment", "temperature setting", "parameter calibration", "fan switching", and "alarm reset" respectively). Both the display screen and the operation buttons are waterproof and dustproof (protection level IP65); the operation window 4 is located below the control device 3, with a total of 2 windows. The operating windows 4 are symmetrically distributed on both sides of the center line on the front of the box. The operating windows 4 are circular with a diameter of 180mm, and the edges of the windows are sealed with food-grade silicone sealing rings. The end of each operating window 4 extends into the interior of the isolation box 1 and is connected to an elastic rubber glove 5. The elastic rubber glove 5 is made of medical-grade nitrile rubber with a thickness of 1.5mm and a length of 500mm. The opening end of the glove is connected to the edge of the operating window 4 by heat-pressing. The heat-pressing temperature is controlled at 180-200℃ and the heat-pressing time is 30s to ensure that there is no air leakage at the connection point. The glove has good elasticity and durability and can meet the needs of medical staff to operate the items inside the box from outside.

[0028] Example 3

[0029] Please see Figure 1 as well as Figure 4This embodiment, based on Embodiment 1, further specifies that a negative pressure sensor 6, a temperature sensor 7, a pollutant concentration sensor 8, and a data acquisition module 9 are fixedly installed on the inner wall of the isolation chamber 1: The negative pressure sensor 6 is a diffused silicon pressure sensor with a measurement range of -100Pa to 0Pa and an accuracy of ±2Pa. It is installed on the upper part of the inner side wall of the chamber, with the sensor probe facing inward. It is fixed to the chamber by threads, and the fixing point is sealed with PTFE sealing tape; the temperature sensor 7 is a platinum resistance sensor (PT100) with a measurement range of 0-50℃ and an accuracy of ±0.1℃. It is installed in the middle of the inner side wall of the chamber, staggered from the negative pressure sensor 6 to avoid mutual interference; the pollutant concentration sensor 8 is an optical scattering particulate matter sensor that can detect the concentration of particulate matter with a particle size ≥0.3μm. With a range of 0-1000μg / m³ and an accuracy of ±5μg / m³, the data acquisition module 9 is installed inside the enclosure near the side wall of the negative pressure production component 10 to ensure real-time monitoring of pollutant concentration before the exhaust airflow. The data acquisition module 9 uses an STM32 series microcontroller and is fixedly installed on the mounting plate on the rear side inside the isolation enclosure 1. The signal output terminals of the negative pressure sensor 6, temperature sensor 7, and pollutant concentration sensor 8 are all electrically connected to the input terminal of the data acquisition module 9 through shielded wires. The outer layer of the shielded wires is wrapped with an aluminum foil shielding layer to reduce external electromagnetic interference. The output terminal of the data acquisition module 9 is electrically connected to the input terminal of the control device 3 through a wire to realize the transmission of sensor data to the control device 3. The display screen of the control device 3 can display the negative pressure value, temperature value, and pollutant concentration value inside the enclosure in real time, which is convenient for operators to monitor.

[0030] Example 4

[0031] Please see Figure 3 as well as Figure 4This embodiment, based on embodiment 1, further specifies that the rear side of the isolation chamber 1 is connected to the negative pressure production component 10. The negative pressure production component 10 includes a main fan 101, a standby fan 102, an exhaust pipe 103, and an activated carbon filter module 104. Both the main fan 101 and the standby fan 102 are centrifugal fans with a rated power of 300W, a rated speed of 2800r / min, and a maximum air pressure of -150Pa. The main fan 101 and the standby fan 102 are fixedly installed side-by-side on the fan bracket at the rear side of the isolation chamber 1. The fan bracket is a welded angle steel structure with a rust-proof surface treatment. The exhaust pipe 103 is made of PVC. The air inlets of the main fan 101 and the standby fan 102 are respectively connected to the internal cavity of the isolation chamber 1 through an exhaust pipe 103. A rubber seal is installed at the connection hole, with its inner diameter matching the outer diameter of the air outlet pipe 103 and its outer diameter matching the inner diameter of the connection hole. The air outlet pipe 103 and the seal are fixed to the isolation chamber 1 with bolts to ensure a leak-proof connection. An activated carbon filter module 104 is installed at the end of the air outlet pipe 103 (located inside the isolation chamber 1). The activated carbon filter module 104 is a cylindrical structure with a diameter matching the inner diameter of the air outlet pipe 103. It is filled with granular activated carbon (particle size 2-3mm, specific surface area ≥1000m² / g). The activated carbon filter module 104 is connected to the air outlet pipe 103 by threads for easy replacement. The activated carbon filter module 104 can adsorb pollutants (such as particulate matter and organic pollutants) in the exhaust airflow from the isolation chamber 1, preventing pollutants from being directly discharged into the external environment.

[0032] Example 5

[0033] Please see Figure 1 Based on Embodiment 1, this embodiment further specifies that one universal wheel 11 is fixedly installed at each of the four corners of the bottom of the isolation box 1. The universal wheel 11 is made of polyurethane material, and each universal wheel 11 is equipped with a brake device. The brake device is a foot pedal. Stepping on the brake pedal can lock the universal wheel 11, preventing the box from moving during use and facilitating the movement and fixation of the box in different scenarios.

[0034] Example 6

[0035] Please see Figure 1 as well as Figure 2 Based on Embodiment 1, this embodiment further specifies that one handle 12 is provided on each of the two shorter sides (i.e., the two sides in the width direction of the box) of the isolation box 1. The handle 12 is made of stainless steel and has an arc-shaped structure. The handle 12 is connected to the isolation box 1 by a hinge. The hinge is made of stainless steel and can be folded. When the box needs to be moved, the handle is unfolded and the operator can hold the handle to push the box. When the box is fixed, the handle is folded to fit against the side wall of the box, saving space and avoiding accidental collisions.

[0036] The working process of this utility model is as follows: Before using the negative pressure isolation box, first open the flip cover 2 using the cover handle 15 (unlock the latch 14, flip it using the connecting hinge 13), check whether the inside of the isolation box 1 is clean and free of debris, whether the elastic rubber gloves 5 are intact (no damage, no loose seals), and whether the activated carbon filter module 104 is newly replaced or has not reached the replacement threshold. Then, place the items to be isolated (such as medical samples, pollutant carriers) into the isolation box 1, close the flip cover 2 and lock the latch 14 to ensure that the isolation box 1 is sealed. Check if the brake device of the caster wheel 11 is locked to prevent the box from moving; adjust the position of the box using the box handle 12 to ensure that the negative pressure production component 10 is unobstructed and the air outlet pipe 103 is securely connected. Finally, turn on the power supply of the equipment and observe whether the display screen of the control device 3 is lit normally and whether the negative pressure sensor 6, temperature sensor 7, and pollutant concentration sensor 8 have no fault alarms (the data acquisition module 9 transmits the initial detection signal, and the display screen displays the initial parameters: negative pressure close to 0Pa, temperature consistent with the environment, and pollutant concentration ≤10μg / m³).

[0037] The equipment is started by pressing the "Power On / Off" button on control device 3. The system defaults to prioritizing the start of the main fan 101 of the negative pressure production component 10. The main fan 101 draws air from the isolation chamber 1 through the air outlet pipe 103, creating negative pressure inside the chamber. Based on isolation requirements, the target negative pressure value is set using the "Negative Pressure Adjustment" button on control device 3. The negative pressure sensor 6 monitors the negative pressure inside the chamber in real time, and the data is transmitted to control device 3 via data acquisition module 9. Control device 3 automatically adjusts the speed of the main fan 101 (or the standby fan 102) to stabilize the negative pressure within the target range. The display screen of control device 3 continuously displays key parameters inside the chamber: negative pressure value (…). The negative pressure sensor 6 collects data, temperature value (collected by temperature sensor 7), and pollutant concentration value (collected by pollutant concentration sensor 8; in Example 2, multiple parameters such as particulate matter, formaldehyde, and ammonia can be displayed). The data acquisition module 9 updates the data every 10 seconds to ensure the real-time performance of the parameters. When medical staff need to operate the items inside the box, they put their hands into the elastic rubber gloves 5 connected to the operation window 4 and operate inside the box through the gloves (such as sample collection and item arrangement). The food-grade silicone sealing ring at the edge of the operation window 4 and the elastic rubber gloves 5 are heat-pressed and sealed (180-200℃, 30s) to ensure that the negative pressure inside the box does not leak during the operation.

[0038] After the isolation task is completed, gradually reduce the negative pressure by pressing the "Negative Pressure Adjustment" button on the control device 3 (reducing by 10Pa each time, with an interval of 30 seconds). When the negative pressure is close to 0Pa, press the "Power On / Off" button to turn off the main fan 101 (or the standby fan 102), unlock the latch 14, open the flip cover 2 through the cover handle 15, and take out the items inside the box. If the items are contaminated, they must be disposed of in accordance with medical waste regulations to avoid secondary pollution. Check the parameter records of the control device 3 to confirm that there are no abnormalities during operation (or that abnormal handling has been recorded), disconnect the power supply to the equipment, and lock the brake device of the caster wheel 11 to prevent the box from moving accidentally.

[0039] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A negative pressure isolation box, characterized in that: The device includes an isolation box (1), with a flip cover (2) connected to the top of the isolation box (1). A control device (3) and an operation window (4) are respectively provided on the front of the isolation box (1). An elastic rubber glove (5) is connected to the end of the operation window (4) inside the isolation box (1). A negative pressure sensor (6), a temperature sensor (7), a pollutant concentration sensor (8), and a data acquisition module (9) are also respectively provided on the inner wall of the isolation box (1). A negative pressure production component (10) is connected to the rear side of the isolation box (1). Universal wheels (11) are fixedly installed at the four corners of the bottom of the isolation box (1).

2. The negative pressure isolation box according to claim 1, characterized in that: The negative pressure production component (10) includes a main fan (101) and a standby fan (102) fixedly installed in the back kitchen of the isolation box (1). The main fan (101) and the standby fan (102) are connected to the internal cavity of the isolation box (1) through an air outlet pipe (103). The air outlet pipe (103) and the isolation box (1) are sealed with a sealing element.

3. A negative pressure isolation box according to claim 2, characterized in that: The end of the exhaust pipe (103) is located inside the isolation box (1) and is equipped with an activated carbon filter module (104) for adsorbing pollutants discharged from the isolation box (1).

4. A negative pressure isolation box according to claim 1, characterized in that: The isolation box (1) has handles (12) on both sides of its shorter side, and the handles (12) and the isolation box (1) are connected by hinges for rotation.

5. A negative pressure isolation box according to claim 1, characterized in that: The flip cover (2) is rotatably connected to the isolation box (1) by a connecting hinge (13) on one side, and locked and fixed to the isolation box (1) by a buckle (14) on the other side. Cover handles (15) are fixedly installed on both sides of the shorter side of the flip cover (2).

6. A negative pressure isolation box according to claim 1, characterized in that: The elastic rubber glove (5) is connected to the edge of the operating window (4) by heat-sealing.

7. A negative pressure isolation box according to claim 1, characterized in that: The negative pressure sensor (6), temperature sensor (7), pollutant concentration sensor (8), and data acquisition module (9) are electrically connected at their input terminals. The output terminal of the data acquisition module (9) is electrically connected to the input terminal of the control device (3). The control device (3) includes a display screen for displaying parameters inside the box and operation buttons.

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