Biological safety cabinet

Abstract

The utility model belongs to the technical field of safety protection equipment, and discloses a biological safety cabinet which comprises a cabinet body, a sealing piece and an exhaust filtering assembly, a limiting step is arranged on the inner wall of the cabinet body in a surrounding mode, a ventilation opening located above the limiting step is formed in the cabinet body, and a mounting opening located below the limiting step is formed in the side wall of the cabinet body; the sealing part is movably arranged on the cabinet body, and the sealing part has a first state for sealing the mounting opening and a first state for opening the mounting opening; the exhaust filtering assembly comprises a first filtering part, an exhaust fan and a first driving part, the exhaust fan communicates with the inner cavity of the cabinet body through the ventilation opening, the first filtering part is arranged in the inner cavity of the cabinet body, and the first driving part is arranged below the first filtering part and used for driving the first filtering part to ascend and descend; the first filtering part has a first state abutting against the limiting step and a second state downwards separating from the limiting step, the first filtering part can be moved out of the cabinet body through the mounting opening when in the second state, and the dismounting difficulty of the first filtering part is reduced.

Description

Technical Field

[0001] This utility model relates to the field of safety protection equipment technology, and in particular to a biosafety cabinet. Background Technology

[0002] A biosafety cabinet (BSC) is a box-type air-purifying negative pressure safety device that prevents the aerosol release of certain hazardous or unknown biological particles during experimental operations. It is widely used in scientific research, teaching, clinical testing, and production in fields such as microbiology, biomedicine, genetic engineering, and biological products. It is the most basic safety protection equipment in the primary protection barrier of laboratory biosafety.

[0003] The filters used to filter biological particles in biological installation cabinets are usually fixed inside the cabinet with bolts, which makes them inconvenient to replace. Utility Model Content

[0004] The purpose of this invention is to provide a biosafety cabinet that solves the problem of inconvenient replacement of filter elements used to filter biological particles.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A biosafety cabinet includes a cabinet body, a closure, and an exhaust filter assembly. The inner wall of the cabinet body is surrounded by a limiting step. A ventilation opening is located above the limiting step on the cabinet body, and a mounting opening is located below the limiting step on the side wall of the cabinet body. The closure is movably mounted on the cabinet body and includes a first state of closing the mounting opening and a first state of opening the mounting opening. The exhaust filter assembly includes a first filter element, an exhaust fan, and a first drive element. The exhaust fan communicates with the inner cavity of the cabinet body through the ventilation opening. The first filter element is disposed within the inner cavity of the cabinet body, and the first drive element is disposed below the first filter element to drive the first filter element to move up and down. The first filter element includes a first state of upward contact with the limiting step and a second state of downward disengagement from the limiting step. When the first filter element is in the first state, the closure element is also in the first state; when the first filter element is in the second state, the closure element is also in the second state, and the orthogonal projection of the first filter element toward the mounting opening completely falls within the range of the mounting opening.

[0007] Optionally, the output end of the first drive unit is fixedly provided with a mounting bracket, and the first filter element is placed inside the mounting bracket.

[0008] Optionally, the limiting step is provided with a limiting groove with the opening facing downward. When the first filter element is in the first state, the mounting bracket is attached to the bottom wall of the limiting groove and the side wall of the limiting groove.

[0009] Optionally, the enclosure is located inside the cabinet and is fixedly connected to the mounting bracket.

[0010] Optionally, a dust collection chamber is provided inside the bottom wall of the cabinet. The dust collection chamber is connected to the inner cavity of the cabinet through a plurality of dust collection holes formed on the bottom wall of the cabinet. The exhaust filter assembly also includes a connecting pipe and a second filter element. The first end of the connecting pipe is connected to the dust collection chamber, and the second end of the connecting pipe is located above the limiting step and is connected to the inner cavity of the cabinet. The second filter element is disposed on the first filter element and rises and falls together with the first filter element. When the first filter element is in the first state, the second filter element is attached to the second end port of the connecting pipe. When the first filter element is in the second state, the second filter element is separated from the connecting pipe, and the orthogonal projection of the second filter element toward the mounting port falls completely within the range of the mounting port.

[0011] Optionally, the dust collection chamber is arranged around the bottom wall of the cabinet, and a connecting cavity is also provided on the bottom wall of the cabinet. The connecting cavity is arranged in a cross shape on the inner side of the dust collection chamber and communicates with the dust collection chamber.

[0012] Optionally, the first filter element is also provided with a force application handle.

[0013] Optionally, the biosafety cabinet further includes a cabinet door and a second drive unit. An opening is provided on the side wall of the cabinet below the limiting step. The cabinet door is slidably disposed on the cabinet body. The second drive unit is connected to the cabinet door to drive the cabinet door to open or close the opening.

[0014] Optionally, the cabinet door includes a movable frame and a transparent window, the movable frame being slidably disposed on the cabinet body, and the transparent window being embedded in the movable frame.

[0015] Optionally, the biosafety cabinet further includes a light-emitting element, which is disposed at the output end of the first drive element and located below the first filter element.

[0016] The beneficial effects of this utility model are as follows: The biosafety cabinet proposed in this utility model uses a first driving component and a limiting step to limit the first filter component. The first filter component and the limiting step can divide the inner cavity of the cabinet into upper and lower chambers. The experiment is conducted in the chamber located below the first filter component. When the exhaust fan is started, the gas in the cabinet located below the first filter component is filtered by the first filter component before being discharged by the exhaust fan, which can effectively prevent dangerous or unknown biological particles from being released as aerosols. When it is necessary to replace or clean the first filter component, the first driving component drives the first filter component to descend to the height of the installation port, and then the first filter component can be taken out from the installation port, which is convenient for disassembly and assembly. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of the biosafety cabinet from one angle in an embodiment of this utility model;

[0018] Figure 2 This is a structural schematic diagram of the biosafety cabinet from another angle in an embodiment of this utility model;

[0019] Figure 3 This is a cross-sectional view of the biosafety cabinet from one angle in an embodiment of this utility model;

[0020] Figure 4 This is a cross-sectional view of the biosafety cabinet from another angle in an embodiment of this utility model;

[0021] Figure 5 yes Figure 4 A magnified structural diagram of point A in the middle.

[0022] In the picture:

[0023] 1. Cabinet body; 11. Limiting step; 111. Limiting groove; 12. Dust collection chamber; 13. Connecting chamber; 14. Opening; 15. Mounting port; 16. Dust collection hole; 2. Sealing component; 3. Exhaust filter assembly; 31. First filter element; 32. Exhaust fan; 33. Second filter element; 34. Mounting bracket; 35. Connecting pipe; 36. First driving component; 37. Force application handle; 4. Cabinet door; 5. Second driving component; 6. Fixed door frame; 7. Light-emitting component. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between 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.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 only used for distinction in description and have no special meaning.

[0028] refer to Figures 1-5As shown in the embodiment of this utility model, a biosafety cabinet is proposed, including a cabinet body 1, a sealing member 2, and an exhaust filter assembly 3. The inner wall of the cabinet body 1 is surrounded by a limiting step 11, and a ventilation opening is provided on the cabinet body 1 above the limiting step 11. An installation opening 15 is provided on the side wall of the cabinet body 1 below the limiting step 11. The sealing member 2 is movably mounted on the cabinet body 1, and includes a first state of closing the installation opening 15 and a second state of opening the installation opening 15. The exhaust filter assembly 3 includes a first filter element 31, an exhaust fan 32, and a first drive element 36. The exhaust fan 32 communicates with the cabinet body through the ventilation opening. The inner cavity of the body 1 is connected. The first filter element 31 is disposed in the inner cavity of the body 1. The first drive element 36 is disposed below the first filter element 31 to drive the first filter element 31 to rise and fall. The first filter element 31 includes a first state of abutting upward against the limiting step 11 and a second state of disengaging downward from the limiting step 11. When the first filter element 31 is in the first state, the sealing element 2 is in the first state. When the second filter element 33 is in the second state, the sealing element 2 is in the second state. The orthogonal projection of the first filter element 31 toward the mounting port 15 falls completely within the range of the mounting port 15. The first filter element 31 can be taken out through the mounting port 15.

[0029] The aforementioned biosafety cabinet utilizes a first drive unit 36 ​​in conjunction with a limiting step 11 to limit the first filter element 31. The first filter element 31 and the limiting step 11 can divide the inner cavity of the cabinet body 1 into upper and lower chambers. The experiment is conducted in the chamber located below the first filter element 31. When the exhaust fan 32 is activated, the gas in the chamber below the first filter element 31 is first filtered by the first filter element 31 and then discharged by the exhaust fan 32, which can effectively prevent dangerous or unknown biological particles from being released as aerosols. When the first filter element 31 needs to be replaced or cleaned, the first drive unit 36 ​​drives the first filter element 31 to descend to the height of the mounting port 15, that is, the first filter element 31 switches to the second state, and then the first filter element 31 can be removed from the mounting port 15. The disassembly and assembly are convenient.

[0030] refer to Figure 3 and Figure 4 As shown, the first drive unit 36 ​​is fixedly connected to the cabinet 1 via the base plate. At the same time, the output end of the first drive unit 36 ​​is fixedly provided with a mounting bracket 34, and the first filter element 31 is placed in the mounting bracket 34 to improve the stability of the first filter element 31 during the lifting process.

[0031] Further, refer to Figure 5As shown, the limiting step 11 is provided with a limiting groove 111 with the slot facing downward. When the first filter element 31 is in the first state, the mounting bracket 34 is embedded in the limiting groove 111 along with the first filter element 31 and fits against the bottom wall and side wall of the limiting groove 111. That is, the limiting step 11 restricts the first filter element 31 from moving upward and also restricts the first filter element 31 from moving horizontally, so the first filter element 31 has higher stability.

[0032] Continue to refer to Figure 4 As shown, the sealing member 2 is located inside the cabinet 1 and is fixedly connected to the mounting bracket 34 to achieve synchronization with the state switching of the first filter element 31 under the action of the first driving member 36. Specifically, the sealing member 2 is disposed on the lower surface of the mounting bracket 34. When the first filter element 31 is in the second state, the sealing member 2 is attached to the inner wall of the cabinet 1 and blocks the mounting opening 15.

[0033] After prolonged use, dust and other foreign objects easily accumulate inside the biosafety cabinet 1, making it difficult to clean. Therefore, a dust collection chamber 12 is provided inside the bottom wall of the cabinet 1. The dust collection chamber 12 is connected to the inner cavity of the cabinet 1 through several dust collection holes 16 on the bottom wall of the cabinet 1. Simultaneously, the exhaust filter assembly 3 includes a connecting pipe 35 and a second filter element 33. The first end of the connecting pipe 35 is connected to the dust collection chamber 12, and the second end of the connecting pipe 35 is located above the limiting step 11 and is connected to the inner cavity of the cabinet 1. The second filter element 33 is disposed at the first... The second filter 33 is positioned above the first filter 31 and rises and falls together with it. When the first filter 31 is in the first state, the second filter 33 is attached to the second end port of the connecting pipe 35 to prevent biological particles from entering above the first filter 31 through the connecting pipe 35 and escaping from the exhaust fan 32. When the first filter 31 is in the second state, the second filter 33 is separated from the connecting pipe 35. Under the action of the exhaust fan 32, dust is sequentially drawn to the top of the first filter 31 through the dust collection chamber 12 and the connecting pipe 35 and then discharged through the exhaust fan 32.

[0034] For example, the first filter element 31 is a filter screen, and the second filter element 33 is an extended filter plate fixed to the edge of the filter screen, with the filter screen disposed on the extended filter plate. It is understood that the orthographic projection of the second filter element 33 toward the mounting port 15 also falls entirely within the range of the mounting port 15, so that the second filter element 33 can be installed and removed together with the first filter element 31. For example, if the mounting port 15 is a vertically oriented rectangular opening, then the height of the mounting port 15 is greater than the overall height of the first filter element 31 and the second filter element 33, and the length of the mounting port 15 is greater than the length of the first filter element 31.

[0035] Specifically, the dust collection chamber 12 is arranged around the bottom wall of the cabinet 1. For example, if the bottom wall of the cabinet 1 is rectangular, then the dust collection chamber 12 is arranged as a square ring. In order to improve the dust collection efficiency, a connecting cavity 13 is also provided in the bottom wall of the cabinet 1. The connecting cavity 13 is arranged in a cross shape on the inner side of the dust collection chamber 12 and communicates with the dust collection chamber 12. Dust can quickly accumulate in the connecting pipe 35 through the connecting cavity 13.

[0036] To reduce the space occupied by the connecting pipe 35 inside the cabinet 1 and to reduce the interference of the connecting pipe 35 with the lifting and lowering of the first filter element 31, a first connecting port and a second connecting port are respectively provided at the bottom of the side wall and the top of the side wall of the cabinet 1. The first connecting port is connected to the dust collection chamber 12, and the second connecting port is opened on the side wall of the cabinet 1 and located above the limiting step 11. The main body of the connecting pipe 35 is located outside the cabinet 1. The first end of the connecting pipe 35 is connected to the dust collection chamber 12 through the first connecting port, and the second end of the connecting pipe 35 is inserted into the second connecting port and connected to the inner cavity of the cabinet 1.

[0037] To improve convenience, mounting ports 15 are provided on both opposite sides of the cabinet 1, and the first filter element 31 can be removed from either mounting port 15. In addition, the first filter element 31 is also provided with a force-applying handle 37 to facilitate the removal of the first filter element 31 from the mounting bracket 34.

[0038] refer to Figure 3 As shown, the biosafety cabinet also includes a cabinet door 4. An opening 14 is provided on the side wall of the cabinet body 1 below the limiting step 11. The opening 14 is on a different side from the mounting port 15. The cabinet door 4 is movably mounted on the cabinet body 1. The cabinet door 4 includes a first state with the opening 14 open and a second state with the opening 14 closed, thereby facilitating relevant experimental operations inside the cabinet body 1.

[0039] In this embodiment, the cabinet door 4 is slidably mounted on the cabinet body 1. Specifically, the cabinet body 1 also includes a fixed door frame 6, which is fixed to the side wall of the cabinet body 1 with an opening 14. The opening 14 is located inside the frame of the fixed door frame 6, and the cabinet door 4 is slidably mounted on the fixed door frame 6.

[0040] To enable automatic opening and closing of the cabinet door 4, the cabinet body 1 also includes a second drive component 5, which is connected to the cabinet door 4 to drive the cabinet door 4 to slide on the fixed door frame 6. For example, both the first drive component 36 and the second drive component 5 can be electric telescopic rods.

[0041] Specifically, in order to facilitate real-time observation of the experimental progress inside the cabinet 1, the cabinet door 4 includes a movable frame and a transparent window. The movable frame is slidably set on the fixed door frame 6, and the transparent window is embedded in the movable frame.

[0042] Based on the transparent window design, the biosafety cabinet also includes a light-emitting element 7, which is located at the output end of the first drive element 36 and below the first filter element 31 to provide illumination for the operator. For example, the light-emitting element 7 is an illumination panel, which is fixedly installed inside the enclosure 2 and tilted towards the center of the bottom of the cabinet 1 to concentrate the light at the center of the bottom of the cabinet 1, resulting in good illumination.

[0043] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A biosafety cabinet, characterized in that, The biosafety cabinet includes: Cabinet (1), the inner wall of the cabinet (1) is surrounded by a limiting step (11), the cabinet (1) is provided with a ventilation opening above the limiting step (11), and the side wall of the cabinet (1) is provided with an installation opening (15) below the limiting step (11). The closure (2) is movably disposed on the cabinet (1), and the closure (2) includes a first state of closing the mounting port (15) and a first state of opening the mounting port (15); An exhaust filter assembly (3) includes a first filter element (31), an exhaust fan (32), and a first drive element (36). The exhaust fan (32) communicates with the inner cavity of the cabinet (1) through the ventilation port. The first filter element (31) is disposed in the inner cavity of the cabinet (1). The first drive element (36) is disposed below the first filter element (31) to drive the first filter element (31) to rise and fall. The first filter element (31) includes a first state of abutting upward against the limiting step (11) and a second state of disengaging downward from the limiting step (11). When the first filter element (31) is in the first state, the sealing member (2) is in the first state. When the first filter element (31) is in the second state, the sealing member (2) is in the second state. The orthographic projection of the first filter element (31) toward the mounting port (15) falls completely within the range of the mounting port (15).

2. The biosafety cabinet according to claim 1, characterized in that, The first drive unit (36) has a mounting bracket (34) fixedly installed at its output end, and the first filter unit (31) is placed inside the mounting bracket (34).

3. The biosafety cabinet according to claim 2, characterized in that, The limiting step (11) is provided with a limiting groove (111) with the groove opening facing downward. When the first filter element (31) is in the first state, the mounting bracket (34) is attached to the bottom wall of the limiting groove (111) and the side wall of the limiting groove (111).

4. The biosafety cabinet according to claim 2, characterized in that, The enclosure (2) is located inside the cabinet (1) and is fixedly connected to the mounting bracket (34).

5. The biosafety cabinet according to any one of claims 1-4, characterized in that, The bottom wall of the cabinet (1) has a dust collection chamber (12) which is connected to the inner cavity of the cabinet (1) through a plurality of dust collection holes (16) on the bottom wall of the cabinet (1). The exhaust filter assembly (3) also includes a connecting pipe (35) and a second filter element (33). The first end of the connecting pipe (35) is connected to the dust collection chamber (12), and the second end of the connecting pipe (35) is located above the limiting step (11) and is connected to the inner cavity of the cabinet (1). The second filter (33) is disposed on the first filter (31) and rises and falls together with the first filter (31). When the first filter (31) is in the first state, the second filter (33) is attached to the second end port of the connecting pipe (35). When the first filter (31) is in the second state, the second filter (33) is separated from the connecting pipe (35). The orthogonal projection of the second filter (33) toward the mounting port (15) falls completely within the range of the mounting port (15).

6. The biosafety cabinet according to claim 5, characterized in that, The dust collection chamber (12) is arranged around the bottom wall of the cabinet (1). A connecting chamber (13) is also provided on the bottom wall of the cabinet (1). The connecting chamber (13) is arranged in a cross shape on the inner side of the dust collection chamber (12) and communicates with the dust collection chamber (12).

7. The biosafety cabinet according to any one of claims 1-4, characterized in that, The first filter element (31) is also provided with a force application handle (37).

8. The biosafety cabinet according to any one of claims 1-4, characterized in that, The biosafety cabinet also includes a cabinet door (4) and a second drive unit (5). An opening (14) is provided on the side wall of the cabinet body (1) below the limiting step (11). The cabinet door (4) is slidably disposed on the cabinet body (1). The second drive unit (5) is connected to the cabinet door (4) to drive the cabinet door (4) to open or close the opening (14).

9. The biosafety cabinet according to claim 8, characterized in that, The cabinet door (4) includes a movable frame and a transparent window. The movable frame is slidably disposed on the cabinet body (1), and the transparent window is embedded in the movable frame.

10. The biosafety cabinet according to claim 9, characterized in that, The biosafety cabinet also includes a light-emitting element (7), which is disposed at the output end of the first drive element (36) and located below the first filter element (31).

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