A biosafety cabinet

Abstract

This utility model discloses a biosafety cabinet, including a cabinet body, an air filtration mechanism, and a sample feeding mechanism. The bottom of the cabinet body is equipped with an electric lifting support, and the inner bottom of the cabinet body has a worktable. The top of the cabinet body has an exhaust port. The air filtration mechanism includes a main air pipe and a branch air pipe. An intake fan is located at the other end of the main air pipe, and a valve is located inside the branch air pipe. The sample feeding mechanism includes a protective cover, and a slide rail is fixed to the inner side wall of the protective cover. A slider is slidably connected to the slide rail, and a sample box is fixed to the slider. This biosafety cabinet features an advanced design, compact structure, and ease of use. It reduces airflow disturbance, prevents the escape of contaminant particles, allows for adjustable ventilation environments for different experimental samples, and allows for height adjustment of the cabinet body, thus accommodating users of different heights at the operating opening.

Description

Technical Field

[0001] This utility model belongs to the field of laboratory equipment technology, specifically relating to a biosafety cabinet. Background Technology

[0002] Biosafety cabinets are designed to protect operators, the laboratory environment, and experimental materials from potential aerosol and splashes during the handling of infectious experimental materials such as primary cultures, bacterial and viral strains, and diagnostic specimens. They are widely used in research, teaching, clinical testing, and production in fields such as microbiology, biomedicine, genetic engineering, and biopharmaceuticals, and are the most basic safety protection equipment in the primary protection barrier of laboratory use. Biosafety cabinets can be divided into three main categories: Class I, Class II, and Class III to meet different biological research and epidemic prevention requirements. Among them, Class II biosafety cabinets are currently the most widely used type. Class II biosafety cabinets not only have an airflow inlet at the front opening to prevent aerosols generated during microbial operations from escaping through the front window, but also a vertical laminar airflow blowing down from the top of the cabinet, known as "descending airflow." This descending airflow continuously blows across the working area of ​​the cabinet to protect the experimental samples inside from external dust or bacteria contamination.

[0003] Existing Class II biosafety cabinets have several areas for improvement, such as: 1. Opening the front window when placing experimental samples into the cabinet may cause airflow disturbance, leading to the escape of contaminant particles; 2. Different experimental samples have different ventilation requirements, but existing Class II biosafety cabinets cannot adjust the ventilation environment; 3. The height of the operating opening is fixed, making it unsuitable for users of different heights. Therefore, there is an urgent need to design a biosafety cabinet to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a biosafety cabinet to solve the problems existing in the background art.

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

[0006] The cabinet has an electric lifting bracket at the bottom, a front window on one side, an operating port and an air inlet on the front window, a worktable at the bottom inside the cabinet, a material inlet on one side of the cabinet, and an exhaust port at the top of the cabinet.

[0007] An air filtration mechanism includes a main air pipe fixed to the inner wall of the cabinet and a branch air pipe that runs vertically through one end of the main air pipe. An intake fan is provided at the other end of the main air pipe. A valve is provided inside the branch air pipe. The branch air pipe has two rows. One row of the branch air pipe is connected to a filter 1 installed in the exhaust port. The other row of the branch air pipe is connected to a filter 2 installed directly above the workbench.

[0008] The sample feeding mechanism includes a protective cover fixed to one side of the feed inlet, a slide rail fixed to the inner side wall of the protective cover, a slider slidably connected to the slide rail, and a material box fixed to the slider.

[0009] Furthermore, the electric lifting bracket includes a support frame fixedly connected to the cabinet, electric lifting columns are fixed on the four prisms of the support frame, and casters are fixed at the four bottom corners of the support frame.

[0010] Furthermore, there are two operating ports, which are symmetrically arranged about the central axis of the windshield, and protective gloves are sealed inside the two operating ports.

[0011] Furthermore, a filter screen is fixed inside the air inlet.

[0012] Furthermore, the workbench has a rectangular hollow structure, with an opening on one side corresponding to the air inlet, and the other two sides of the workbench are connected to two main air pipes respectively. The top of the workbench has several ventilation holes.

[0013] Furthermore, a display screen is provided on one side of the cabinet, and a microcontroller is electrically connected to one side of the display screen. The microcontroller is also electrically connected to the electric lifting column, the air intake fan, and the valves.

[0014] Furthermore, both filter one and filter two are HEPA filters.

[0015] Furthermore, the longitudinal section of the protective cover is an inverted U-shaped structure, and one end of the protective cover is sleeved on the outside of the feed inlet.

[0016] Furthermore, the material box is a cuboid structure without a top cover, with handles fixed at both ends, and several partitions vertically fixed inside the material box.

[0017] The technical effects and advantages of this utility model are as follows: This biosafety cabinet has an advanced design, compact structure, and is easy to use. By setting up a sample feeding mechanism, the experimental sample is placed in the material box, slides along the slide rail to the feeding port, and enters the cabinet body, which can reduce airflow disturbance and prevent the escape of contaminant particles. By setting up a gas distribution pipe and valve, the flow rate of circulating gas and exhaust gas can be controlled by controlling the closure of the valve, so that the ventilation environment can be adjusted to suit different experimental samples. By setting up an electric lifting bracket, the height of the cabinet can be adjusted, so that the height of the operating port can be adapted to users of different heights. Attached Figure Description

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

[0019] Figure 2 This is a vertical sectional view of the present invention from the main viewing direction;

[0020] Figure 3 This is a vertical sectional view of the present invention from the left view direction.

[0021] In the diagram: 100, Cabinet; 101, Electric lifting bracket; 1011, Support frame; 1012, Electric lifting column; 1013, Casters; 102, Front window glass; 103, Operating port; 104, Air inlet; 105, Workbench; 106, Feed inlet; 107, Exhaust port; 108, Protective gloves; 109, Filter screen; 110, Vent hole; 111, Display screen; 200, Air filtration mechanism; 201, Main air pipe; 202, Distribution air pipe; 203, Intake fan; 204, Valve; 205, Filter 1; 206, Filter 2; 300, Sample feeding mechanism; 301, Protective cover; 302, Slide rail; 303, Slider; 304, Material box; 305, Handle; 306, Partition. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] This utility model provides, for example Figure 1-3 The biosafety cabinet shown includes:

[0026] The cabinet 100 has an electric lifting bracket 101 at the bottom, a front window 102 on one side, an operation port 103 and an air inlet 104 on the front window 102, a workbench 105 at the bottom inside the cabinet 100, a material inlet 106 on one side of the cabinet 100, and an exhaust port 107 on the top of the cabinet 100.

[0027] The air filtration mechanism 200 includes a main air pipe 201 fixed to the inner wall of the cabinet 100 and a branch air pipe 202 that runs vertically through one end of the main air pipe 201. An intake fan 203 is provided at the other end of the main air pipe 201. A valve 204 is provided inside the branch air pipe 202. The branch air pipe 202 has two rows. One row of branch air pipes 202 is connected to a filter 205 installed in the exhaust port 107. The other row of branch air pipes 202 is connected to a filter 206 installed directly above the workbench 105.

[0028] The sample feeding mechanism 300 includes a protective cover 301 fixed to one side of the feed port 106. A slide rail 302 is fixed to the inner side wall of the protective cover 301. A slider 303 is slidably connected to the slide rail 302. A material box 304 is fixed to the slider 303.

[0029] For example, see Figures 1-2As shown, the electric lifting bracket 101 includes a support frame 1011 fixedly connected to the cabinet 100. Electric lifting columns 1012 are fixed on the four prisms of the support frame 1011, and casters 1013 are fixed at the four corners of the bottom of the support frame 1011.

[0030] In this technical solution, when the height of the operating port 103 needs to be adjusted, the electric lifting column 1012 is activated. The telescopic ends of the four electric lifting columns 1012 extend downwards by the same length. When the extension length is greater than the distance between the telescopic end and the ground, the electric lifting bracket 101 and the cabinet 100 will be lifted upwards, thereby raising the height of the operating port 103. When the cabinet 100 needs to be moved, the telescopic ends of the electric lifting columns 1012 are retracted to above the casters 1013. At this time, the casters 1013 are in contact with the ground, facilitating movement.

[0031] For example, see Figure 1 and Figure 3 As shown, there are two operation ports 103. The two operation ports 103 are symmetrically arranged about the central axis of the front window glass 102. Protective gloves 108 are sealed and connected inside the two operation ports 103.

[0032] In this technical solution, the two operating ports 103 are designed to allow staff to insert their hands into the cabinet 100 for experimental operations. The protective gloves 108 can protect the staff's hands and also seal the operating ports 103 to prevent gas from escaping.

[0033] For example, see Figure 1 As shown, a filter screen 109 is fixed inside the air inlet 104.

[0034] This technical solution can prevent debris from entering the cabinet 100 through the air inlet 104.

[0035] For example, see Figures 2-3 As shown, the workbench 105 is a rectangular hollow structure. One side of the workbench 105 is provided with an opening corresponding to the air inlet 104. The other two sides of the workbench 105 are respectively connected to two main air pipes 201. The top of the workbench 105 is provided with several ventilation holes 110.

[0036] In this technical solution, external air enters the interior of the workbench 105 through the air inlet 104 and the opening on the workbench 105 and flows along the main air pipe 201. Part of the gas is filtered by filter one 205 and then discharged from the cabinet 100. The other part of the gas is filtered by filter two 206 and then sinks vertically in a laminar flow, evenly covering the entire working area. This can suppress the diffusion of aerosols generated during operation and ensure that the polluting particles are directionally transported to the bottom of the cabinet 100 and enter the workbench 105 through the vent 110. Then, the polluting particles move with the external air and are finally filtered by filter one 205 or filter two 206.

[0037] For example, see Figure 1 As shown, a display screen 111 is provided on one side of the cabinet 100. A microcontroller (not shown in the figure) is electrically connected to one side of the display screen 111. The microcontroller is also electrically connected to the electric lifting column 1012, the air intake fan 203 and the valve 204 respectively.

[0038] In this technical solution, the operating status of each electrical appliance can be conveniently displayed on the display screen 111.

[0039] For example, both filter 205 and filter 206 are HEPA filters.

[0040] In this technical solution, the HEPA (High-Efficiency Particulate Air) filter is a high-efficiency air filtration technology that is widely used in medical, laboratory, industrial and household fields (such as air purifiers, vacuum cleaners, etc.). It has an extremely high filtration capacity and can effectively filter particulate matter larger than or equal to 0.3 microns.

[0041] For example, see Figure 1 As shown, the longitudinal section of the protective cover 301 is an inverted U-shaped structure, and one end of the protective cover 301 is sleeved on the outside of the feed inlet 106.

[0042] In this technical solution, the protective cover 301 can protect the material box 304. The material box 304 can slide along the slide rail 302 to the feed port 106. When it is necessary to take out the experimental sample, one end of the material box 304 can be pulled into the cabinet 100. After taking out the experimental sample, the material box 304 can be pushed out of the cabinet 100 to save space.

[0043] For example, see Figure 2 As shown, the material box 304 is a cuboid structure without a top cover. Handles 305 are fixed at both ends of the material box 304, and several partitions 306 are vertically fixed inside the material box 304.

[0044] In this technical solution, one handle 305 facilitates pulling the material box 304 out of the protective cover 301 to place the experimental sample, and the other handle 305 facilitates pulling the material box 304 into the cabinet 100 to retrieve the experimental sample. The partition 306 can divide the material box 304 into multiple spaces for individual placement of experimental samples, which not only facilitates quick retrieval of experimental samples, but also avoids cross-contamination between different experimental samples, and can also isolate the inlet 106 to prevent gas in the cabinet 100 from escaping through the slot in the material box 304.

[0045] Working principle: When using this biosafety cabinet, firstly, the electric lifting column 1012 is extended or retracted according to the user's height so that the height of the operating port 103 matches the user's height. Then, the experimental sample is placed into the material box 304. Next, the intake fan 203 is turned on, and the valve 204 is controlled to close according to the type of experimental sample, so as to control the ratio of internal circulating airflow to external exhaust airflow, providing different ventilation environments for different experimental samples. Then, the experimental sample is loaded into the material box 304, and the material box 304 is slid to the inlet 106. The staff can put their hands into the operating port 103 and put on protective gloves 108, and then pull the material box 304 into the cabinet 100 to retrieve the experimental sample through the handle 305. This biosafety cabinet features an advanced design, compact structure, and ease of use. With a sample feeding mechanism 300, experimental samples are placed in the material box 304, slide along the slide rail 302 to the inlet 106, and enter the cabinet body 100. This reduces airflow disturbance and prevents the escape of contaminant particles. By incorporating a gas distribution pipe 202 and a valve 204, the flow rate of circulating air and exhaust gas can be controlled by adjusting the valve 204's closure. This allows for adjustments to the ventilation environment to suit different experimental samples. Furthermore, the electric lifting bracket 101 allows for adjustment of the cabinet body 100's height, accommodating users of varying heights at the operating port 103.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 biosafety cabinet, characterized in that, include: The cabinet (100) has an electric lifting bracket (101) at the bottom, a front window (102) on one side, an operation port (103) and an air inlet (104) on the front window (102), a workbench (105) at the bottom inside the cabinet (100), a feed inlet (106) on one side of the cabinet (100), and an exhaust port (107) at the top of the cabinet (100). An air filtration mechanism (200) is provided, comprising a main air pipe (201) fixed to the inner wall of the cabinet (100) and a branch air pipe (202) that runs vertically through one end of the main air pipe (201). An intake fan (203) is provided at the other end of the main air pipe (201). A valve (204) is provided inside the branch air pipe (202). The branch air pipe (202) has two rows. One row of the branch air pipe (202) is connected to a filter (205) located in the exhaust port (107). The other row of the branch air pipe (202) is connected to a filter (206) located directly above the workbench (105). The sample feeding mechanism (300) includes a protective cover (301) fixed on one side of the feed port (106), a slide rail (302) fixed on the inner side wall of the protective cover (301), a slider (303) slidably connected on the slide rail (302), and a material box (304) fixed on the slider (303).

2. The biosafety cabinet according to claim 1, characterized in that: The electric lifting bracket (101) includes a support frame (1011) fixedly connected to the cabinet (100). Electric lifting columns (1012) are fixed on the four prisms of the support frame (1011), and casters (1013) are fixed at the four corners of the bottom of the support frame (1011).

3. The biosafety cabinet according to claim 1, characterized in that: There are two operating ports (103), which are symmetrically arranged about the central axis of the front window glass (102). Protective gloves (108) are sealed inside the two operating ports (103).

4. The biosafety cabinet according to claim 1, characterized in that: A filter screen (109) is fixed inside the air inlet (104).

5. The biosafety cabinet according to claim 1, characterized in that: The workbench (105) is a rectangular hollow structure. One side of the workbench (105) is provided with an opening corresponding to the air inlet (104). The other two sides of the workbench (105) are respectively connected to two main air pipes (201). The top of the workbench (105) is provided with several ventilation holes (110).

6. The biosafety cabinet according to claim 2, characterized in that: The cabinet (100) has a display screen (111) on one side, and a microcontroller is electrically connected to one side of the display screen (111). The microcontroller is also electrically connected to the electric lifting column (1012), the air intake fan (203), and the valve (204).

7. The biosafety cabinet according to claim 1, characterized in that: Both filter one (205) and filter two (206) are HEPA filters.

8. The biosafety cabinet according to claim 1, characterized in that: The longitudinal section of the protective cover (301) is an inverted U-shaped structure, and one end of the protective cover (301) is sleeved on the outside of the feed inlet (106).

9. The biosafety cabinet according to claim 1, characterized in that: The material box (304) is a cuboid structure without a top cover. The material box (304) has handles (305) fixed at both ends. Several partitions (306) are vertically fixed inside the material box (304).

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