Biosafety cabinet auxiliary device for removing microbial spores
By using transparent windbreaks and covers in biosafety cabinets, the problems of spore floating and attachment were solved, reducing cross-contamination and laboratory contamination, and ensuring the reliability of experimental results.
Patent Information
- Application Number
- CN202520182411.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-02-05
AI Technical Summary
During the microbial culture process, spores can easily float and adhere to the surface of the biosafety cabinet, leading to cross-contamination and laboratory contamination, which affects the authenticity and feasibility of experimental results.
Design an auxiliary device including a transparent windbreak and a cover plate. The windbreak consists of a front baffle and side baffles, with ventilation holes distributed on the windbreak to form a negative pressure zone to absorb spores and reduce floating and attachment.
This effectively reduces the floating and attachment of spores within the biosafety cabinet, lowering the risk of cross-contamination and laboratory contamination, and ensuring the accuracy of experimental results.
Smart Images
Figure CN223866642U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of experimental auxiliary tools, specifically to an auxiliary device for a biosafety cabinet used to remove microbial spores. Background Technology
[0002] Biosafety cabinets are designed to protect operators, the laboratory environment, and experimental materials from infectious aerosols and splashes generated during the handling of primary cultures, bacterial and viral strains, and diagnostic specimens. The airflow patterns are vertical and horizontal laminar, creating localized micro-negative pressure to prevent microbial spores from escaping outside the biosafety cabinet. Their primary function is to filter air through high-efficiency filters, removing particulate matter, bacteria, and other contaminants to ensure the operating area reaches Class 100 cleanliness, thus meeting the environmental cleanliness requirements of production. This is particularly important during operations such as microbial research and large-scale culture.
[0003] Both "An Investigation into the Contamination Status of a Cell Culture Laboratory in a University in Guangxi" and "Monitoring and Analysis of Influencing Factors of Airborne Bacterial Contamination under Dynamic Conditions in Biosafety Cabinets" record that biosafety cabinets are prone to contamination, including external contamination and cross-contamination during culture. Meanwhile, "A Discussion on Cross-Contamination of Highly Pathogenic Viruses in High-Level Biosafety Laboratories" also provides several measures to prevent cross-contamination, namely spatial isolation, temporal isolation, task isolation, preservation isolation, and regular monitoring.
[0004] During microbial culture operations, some microorganisms produce spores. Spores are small, highly hydrophobic, and have a high degree of buoyancy in the air. When exposed to a biosafety cabinet, they move with the airflow, especially when the operator moves vigorously, causing significant disturbance to the airflow on the biosafety cabinet surface. Spores easily float on the surface with the disturbed airflow. If suitable attachment conditions are present (such as culture medium or work clothes surface), they will adhere to the surface. When culturing other types of strains, this causes contamination, greatly reducing the accuracy and feasibility of experimental test results. If they adhere to the work clothes surface, they can easily float again, thus contaminating the laboratory after the experiment.
[0005] Therefore, an auxiliary device is needed to reduce the floating and lingering of spores on the biosafety cabinet platform, thereby minimizing their impact on subsequent microbial culture. Utility Model Content
[0006] To address the aforementioned technical problems, this utility model provides an auxiliary device for removing microbial spores from a biosafety cabinet. This device serves as an auxiliary tool for the biosafety cabinet during the cultivation of microbial strains, effectively removing spores from the biosafety cabinet and reducing their impact on subsequent cultivation.
[0007] The technical solution adopted in this application to address this technical problem is as follows:
[0008] A biosafety cabinet auxiliary device for removing microbial spores includes a transparent wind deflector and a transparent cover. The upper end of the wind deflector is connected to the cover. The wind deflector includes a front enclosure and side enclosures. The two ends of the front enclosure are connected to the side enclosures. The two side enclosures, together with the front enclosure and the cover, form an enclosed structure with a side opening and an internal operating space. Both side enclosures are provided with notches for hand access, and the side enclosures outside the notches are evenly distributed with ventilation holes for air to flow into the operating space.
[0009] Furthermore, both the front and side enclosures are upward-opening grooves, and ventilation holes are evenly distributed on the inner walls of both the front and side enclosures. The cover plate is connected to the upper inner side of the front and side enclosures.
[0010] Furthermore, the distance between the rear ends of the two side barriers is greater than the length of the front barrier.
[0011] Furthermore, the side enclosure and the front enclosure form an obtuse angle, with an included angle of 110°-135°.
[0012] Furthermore, the length of the front enclosure is 40-60cm, and the length of the side enclosure is 40-60cm.
[0013] Furthermore, the end of the cover plate near the front enclosure is lower, and the end near the free end of the side enclosure is higher.
[0014] Furthermore, the angle between the cover plate and the horizontal plane is 20°-30°.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] This invention serves as an auxiliary tool for biosafety cabinets, reducing the floating and dwelling of microbial spores, preventing spores from adhering to work clothes, and reducing the occurrence of cross-contamination or laboratory contamination.
[0017] This invention is made of transparent material, which facilitates sterilization using ultraviolet light, enabling simple sterilization and reuse. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a top view of the interior of the production safety cabinet of this utility model;
[0020] Figure 3 This is a diagram of the airflow pattern (left view) inside a biosafety cabinet according to this invention.
[0021] The attached diagram is labeled as follows: 1. Windshield; 2. Cover plate; 3. Front enclosure; 4. Side enclosure; 5. Ventilation hole; 6. Notch; 7. Tabletop; 8. Glass baffle; 9. Front air intake; 10. Rear air intake. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.
[0023] like Figure 1 As shown, Figure 1 The diagram shows a structural schematic of Embodiment 1 of this utility model, an auxiliary device for removing microbial spores in a biosafety cabinet, including a wind deflector 1 and a cover plate 2. The upper end of the wind deflector 1 is connected to the cover plate 2. Both the wind deflector 1 and the cover plate 2 are made of transparent materials such as glass or acrylic, allowing the interior to be seen through them while also facilitating ultraviolet light transmission for sterilization. The wind deflector 1 includes a front enclosure 3 and side enclosures 4. The two ends of the front enclosure 3 are connected to the side enclosures 4. The upper ends of the inner surfaces of the front enclosure 3 and the side enclosures 4 are connected to the cover plate 2. Both side enclosures 4 have notches 6 for hand access. The two side enclosures 4, together with the front enclosure 3 and the cover plate 2, form an enclosed structure with an internal operating space. This enclosed structure has a rearward-facing side opening, such as... Figure 2 As shown, when this utility model is placed on the tabletop 7 of the biosafety cabinet, the side opening is close to the rear air intake 10 on the rear side of the biosafety cabinet. The rear air intake 10 on the rear side of the biosafety cabinet creates negative pressure in the operating space. The side enclosure 4 is evenly distributed with ventilation holes 5 for air to flow into the operating space.
[0024] Both the front enclosure 3 and the side enclosure 4 are upward-opening grooves. Ventilation holes 5 are evenly distributed on the inner sidewalls of both the front enclosure 3 and the side enclosure 4. The cover plate 2 is connected to the upper inner side of the front enclosure 3 and the side enclosure 4, which not only isolates the influence of the front air intake 9 on the front side of the biosafety cabinet, but also provides clean air to the operating space. The distance between the rear ends of the two side enclosures 4 is greater than the length of the front enclosure 3, that is, the rear ends of the two side enclosures 4 expand to both sides respectively. The side enclosure 4 and the front enclosure 3 form an obtuse angle with an included angle of 110°-135° to increase the volume of the operating space and increase the length of the rear air intake 10 opposite the side opening, so as to increase the negative pressure in the operating space, increase the airflow through the ventilation holes 5, and form a relatively strong airflow. The length of the front enclosure 3 is 40-60cm, and the length of the side enclosure 4 is 40-60cm.
[0025] The cover plate 2 is tilted with the end closer to the front enclosure 3 being lower and the end closer to the free end of the side enclosure 4 being higher. The angle between the cover plate 2 and the horizontal plane is 20°-30°. The tilted cover plate 2 reduces light reflection on the biosafety cabinet, making the field of vision clearer. It also makes the rear of the operating space higher, avoiding interference when placing alcohol lamps or other tools.
[0026] Instructions for use: Place this utility model on the biosafety cabinet's countertop 7, with the cover 2 facing upwards and the side opening facing the rear air intake 10 of the biosafety cabinet. The front baffle 3 is close to the glass baffle 8 of the biosafety cabinet and located behind the front air intake 9 of the countertop 7, without obstructing the front air intake 9 or affecting the raising and lowering of the glass baffle 8. Because the negative pressure inside this utility model is relatively large, air is drawn into the operating space through the vents 5, forming an airflow that blows from the inner wall of the operating space towards the center of the operating space. Figure 2 As shown, from a top-down view, the airflow at four points on the side barriers makes it difficult for spores to adhere to work clothes, such as... Figure 3 As shown, from the left-hand view, the airflow at the front enclosure causes the spores to be drawn away with the airflow, reducing the floating and attachment of spores in the operating space. This reduces the problem of cross-contamination between spores and other cultured microorganisms after they float and the problem of spores adhering to work clothes and spreading into the laboratory.
Claims
1. An auxiliary device for removing microbial spores from a biosafety cabinet, characterized in that, The device includes a wind deflector (1) and a cover plate (2). The wind deflector (1) has a transparent cover plate (2) at its upper end. The wind deflector (1) includes a front enclosure (3) and a side enclosure (4). The two ends of the front enclosure (3) are connected to the side enclosures (4). The two side enclosures (4), together with the front enclosure (3) and the cover plate (2), form an enclosed structure with a side opening and an internal operating space. Both side enclosures (4) have notches (6) for hand access. The side enclosures (4) outside the notches (6) are evenly distributed with ventilation holes (5) for air to flow into the operating space.
2. The biosafety cabinet auxiliary device for removing microbial spores according to claim 1, characterized in that, Both the front enclosure (3) and the side enclosure (4) are upward-opening grooves. Ventilation holes (5) are evenly distributed on the inner sidewalls of the front enclosure (3) and the side enclosure (4). The cover plate (2) is connected to the upper inner side of the front enclosure (3) and the side enclosure (4).
3. The biosafety cabinet auxiliary device for removing microbial spores according to claim 1, characterized in that, The distance between the rear ends of the two side barriers (4) is greater than the length of the front barrier (3), and the side barriers (4) and the front barrier (3) form an obtuse angle with an included angle of 110°-135°.
4. The biosafety cabinet auxiliary device for removing microbial spores according to claim 1, characterized in that, The length of the front enclosure (3) is 40-60cm, and the length of the side enclosure (4) is 40-60cm.
5. The biosafety cabinet auxiliary device for removing microbial spores according to claim 1, characterized in that, The end of the cover plate (2) near the front enclosure (3) is lower, and the end near the free end of the side enclosure (4) is higher.