Biological safety cabinet

Abstract

The utility model discloses a biological safety cabinet which comprises a cabinet body, a cabinet door and a counterweight plate, a first cavity is formed in the cabinet body, a partition plate is arranged in the first cavity, the partition plate is arranged in the horizontal direction, and the partition plate divides the first cavity into an air exchange cavity and a test cavity; according to the safety cabinet, the separation plate is arranged to separate the test chamber and improve the safety, the test chamber can be used for placing a biological sample and is matched with the cabinet door to close the operation opening, so that the test chamber is closed and the biological sample is conveniently tested subsequently, and then the air exchange chamber and the air outlet are arranged, and an exhaust fan in the air exchange chamber is utilized, so that the safety of the biological sample is improved. Harmful gas in the test chamber is exhausted, it is ensured that no harmful gas exists in the test chamber after the test is completed, the overall safety is high, practicability and reliability are achieved, and the process operation is easy and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental equipment, in particular to a biological safety cabinet. Background Art

[0002] A biosafety cabinet is a box-shaped air purification negative pressure safety device that can prevent the escape of aerosols containing certain dangerous or unknown biological particles during experimental operations. Existing safety cabinets have insufficient overall safety. Typically, a fan is installed directly in the chamber inside the safety cabinet to extract harmful gases. This can easily lead to insufficient airtightness, incomplete treatment of harmful gases, and leakage into the atmosphere. Publication number CN219186948U discloses a biosafety cabinet comprising a housing, a partition, a workbench, and a water collection box. The housing has a storage space; the partition is disposed within the housing to separate the storage space into a filtration space and an operating space, the filtration space being located above the operating space; a first side surface of the housing has an operating window connected to the operating space; a workbench is disposed transversely to the operating space, with a rear end hinged to the inner wall of the operating space, and the workbench can rotate up and down between a first angle and a second angle; and a water collection box is disposed below the workbench to collect water that falls from the workbench. The safety cabinet has no exhaust system and no door to close the chamber, and its overall safety is insufficient. Utility Model Content

[0003] In view of the deficiencies in the prior art, the present invention aims to provide a biological safety cabinet with high safety.

[0004] To achieve the above-mentioned object, the present invention provides a solution as follows: a biological safety cabinet, comprising a cabinet body, a cabinet door, and a counterweight plate, wherein a first chamber is formed in the cabinet body, a partition plate is provided in the first chamber, the partition plate is arranged horizontally, and the partition plate divides the first chamber into a ventilation chamber and a test chamber, the ventilation chamber and the test chamber are arranged vertically, an operation port is opened on the front of the cabinet body, the operation port is connected to the test chamber, the outer wall of the cabinet body is slidably connected to the cabinet door, the cabinet door is used to open or close the operation port, and the counterweight plate is connected to the cabinet door;

[0005] The partition plate is provided with a plurality of ventilation holes, which are used to connect the ventilation chamber and the test chamber. The top of the cabinet is provided with an exhaust port, which is connected to the ventilation chamber. An exhaust fan is provided in the ventilation chamber.

[0006] The beneficial effects of the present invention are: easy operation and high safety. The safety cabinet is equipped with a partition plate to separate the test chamber to improve safety. The test chamber can be used for placing biological samples. The cabinet door is used to close the operating port to close the test chamber, which is convenient for subsequent testing of biological samples. Then, by setting up an air exchange chamber and an exhaust port and utilizing the exhaust fan in the air exchange chamber, harmful gases in the test chamber can be discharged to ensure that there is no harmful gas in the test chamber after the test is completed. The overall safety is high, practical and reliable, and the process is easy to operate.

[0007] Furthermore, two first sliding guide rails are provided on the front side of the outer wall of the cabinet body, and the two first sliding guide rails are slidably connected to the cabinet door together. Two second sliding guide rails are provided on the back side of the outer wall of the cabinet body, and the two second sliding guide rails are slidably connected to the counterweight plate together. After adopting the above structure, the utility model can realize the movement of the cabinet door and the counterweight plate.

[0008] Furthermore, the outer wall of the cabinet body is rotatably connected to two rollers, one of the rollers is rotatably connected to a chain, one end of the chain is connected to the cabinet door, and the other end is connected to the counterweight plate. After adopting the above structure, the cabinet door is connected to the counterweight plate.

[0009] Furthermore, a first handle is provided on the cabinet door. After the utility model adopts the above structure, the cabinet door can be pulled.

[0010] Furthermore, an air outlet hood is provided in the ventilation chamber, the air outlet hood is provided on the partition plate, a first air outlet and a second air outlet are provided on the top of the air outlet hood, and the first air outlet is connected to an exhaust fan. After adopting the above structure, the utility model realizes the suction of gas in the test chamber.

[0011] Furthermore, filter screens are provided between the air outlet cover and the partition plate and at the air outlet. After the utility model adopts the above structure, harmful gases in the test chamber are filtered.

[0012] Furthermore, a liquid collecting tank is provided at the bottom of the test chamber, a liquid discharge port is provided at the bottom of the liquid collecting tank, a liquid discharge port is connected to a liquid discharge pipe, and a switch valve is provided on the liquid discharge pipe. After adopting the above structure, the utility model can collect and discharge waste liquid in the test chamber.

[0013] Furthermore, a workbench is provided in the test chamber, and the workbench covers the liquid collecting tank, wherein the workbench is provided with a plurality of drainage holes, and a plurality of reinforcing ribs are provided at the bottom of the workbench.

[0014] Furthermore, a second handle is hinged on the workbench. After the utility model adopts the above structure, the workbench can be lifted. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The overall structure of the utility model is three-dimensional Figure 1 .

[0016] Figure 2 The overall structure of the utility model is three-dimensional Figure 2 .

[0017] Figure 3 The overall structure of the utility model is three-dimensional Figure 3 .

[0018] Figure 4 The overall structure of the utility model is three-dimensional Figure 4 .

[0019] Figure 5 The overall structure of the utility model is three-dimensional Figure 5 .

[0020] Among them, 1 is a cabinet body, 11 is a partition plate, 111 is an air exchange hole, 12 is an air exchange chamber, 121 is an exhaust fan, 122 is an air outlet hood, 1221 is a first air outlet, 1222 is a second air outlet, 13 is a test chamber, 131 is a liquid collecting tank, 132 is a drain port, 133 is a drain pipe, 134 is a switch valve, 135 is a workbench, 1351 is a drain hole, 1352 is a reinforcing rib, 1353 is a second handle, 14 is an operation port, 15 is an air outlet, 16 is a first sliding guide rail, 17 is a second sliding guide rail, 18 is a filter screen, 21 is a cabinet door, 211 is a first handle, 22 is a counterweight plate, and 23 is a roller. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] See attached Figure 1 To the attached Figure 5 As shown, a biological safety cabinet includes a cabinet body 1, a cabinet door 21, and a counterweight plate 22. A first chamber is formed in the cabinet body 1, and a partition plate 11 is arranged in the first chamber. The partition plate 11 is arranged horizontally. The partition plate 11 divides the first chamber into an air exchange chamber 12 and a test chamber 13. The air exchange chamber 12 and the test chamber 13 are arranged up and down. An operation port 14 is opened on the front of the cabinet body 1, and the operation port 14 is connected to the test chamber 13. The outer wall of the cabinet body 1 is slidably connected to the cabinet door 21, and the cabinet door 21 is used to open or close the operation port 14. The counterweight plate 22 is connected to the cabinet door 21.

[0024] In this embodiment, two first sliding rails 16 are provided on the front side of the outer wall of the cabinet body 1, and the two first sliding rails 16 are slidably connected to the cabinet door 21 together. Two second sliding rails 17 are provided on the back side of the outer wall of the cabinet body 1, and the two second sliding rails 17 are slidably connected to the counterweight plate 22 together. Two rollers 23 are rotatably connected to the outer wall of the cabinet body 1, and a chain is rotatably connected to one roller 23, one end of the chain is connected to the cabinet door 21, and the other end is connected to the counterweight plate 22. A first handle 211 is provided on the cabinet door 21.

[0025] The partition plate 11 is provided with a plurality of ventilation holes 111, which are used to connect the ventilation chamber 12 and the test chamber 13. An exhaust port 15 is provided on the top of the cabinet 1, which is connected to the ventilation chamber 12. An exhaust fan 121 is provided in the ventilation chamber 12.

[0026] In this embodiment, an air outlet hood 122 is provided in the air exchange chamber 12, and the air outlet hood 122 is provided on the partition plate 11. A first air outlet 1221 and a second air outlet 1222 are provided on the top of the air outlet hood 122. The first air outlet 1221 is connected to the exhaust fan 121; a filter 18 is provided between the air outlet hood 122 and the partition plate 11 and at the exhaust outlet 15.

[0027] In this embodiment, a liquid collecting tank 131 is provided at the bottom of the test chamber 13, a drain port 132 is provided at the bottom of the liquid collecting tank 131, the drain port 132 is connected to a drain pipe 133, and a switch valve 134 is provided on the drain pipe 133. A workbench 135 is provided in the test chamber 13, and the workbench 135 covers the liquid collecting tank 131, wherein the workbench 135 has multiple drainage holes 1351, and multiple reinforcing ribs 1352 are provided at the bottom of the workbench 135, and a second handle 1353 is hinged on the workbench 135.

[0028] In this embodiment, the switch valve 134 is a ball valve.

[0029] In this embodiment, the specific usage process is as follows: first, the biological sample to be tested is placed on the workbench 135 of the test chamber 13, and then the first handle 211 is pulled to drive the cabinet door 21 to slide downward until the cabinet door 21 closes the operation port 14. The downward movement of the cabinet door 21 drives the counterweight plate 22 upward via the chain, and the counterweight plate 22 keeps the cabinet door 21 stationary at its current position;

[0030] During the reaction of the biological sample in the test chamber 13, harmful gases are generated. Then, the exhaust fan 121 is started to suck the harmful gases in the test chamber 13. The harmful gases in the test chamber 13 pass through the multiple air exchange holes 111 and are filtered by the filter 18. The filtered gases enter the first air outlet 1221 and the second air outlet 1222 respectively, and then enter the air exchange chamber 12. Finally, they are filtered by the filter 18 at the exhaust port 15 and discharged into the atmosphere through the exhaust port 15.

[0031] After the set time has passed, the test is completed and the first handle 211 is pulled to slide the cabinet door 21 upward until the cabinet door 21 opens the operation port 14 , and then the biological sample in the test chamber 13 can be taken out.

[0032] Among them, the waste liquid generated during the test of the biological sample falls onto the workbench 135 and then falls into the collecting tank 131 through multiple drainage holes 1351 for collection. After the test is completed and the biological sample is taken out, the switch valve 134 is opened to drain the waste liquid in the collecting tank 131 through the drainage port 132 and the drainage pipe 133.

[0033] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any person skilled in the art may, without departing from the scope of the present invention, utilize the technical content disclosed above to make further possible variations and modifications to the present invention, or to modify the present invention into equivalent embodiments with equivalent variations. Therefore, any equivalent variations made in accordance with the principles of the present invention without departing from the scope of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A biosafety cabinet comprising a cabinet body (1), a cabinet door (21), and a counterweight plate (22), characterized in that: A first chamber is formed in the cabinet (1), and a partition plate (11) is provided in the first chamber. The partition plate (11) is arranged in a horizontal direction. The partition plate (11) divides the first chamber into an air exchange chamber (12) and a test chamber (13). The air exchange chamber (12) and the test chamber (13) are arranged vertically. An operation port (14) is provided on the front of the cabinet (1), and the operation port (14) is connected to the test chamber (13). The outer wall of the cabinet (1) is slidably connected to the cabinet door (21), and the cabinet door (21) is used to open or close the operation port (14). The counterweight plate (22) is connected to the cabinet door (21). The partition plate (11) is provided with a plurality of ventilation holes (111), the plurality of ventilation holes (111) being used to connect the ventilation chamber (12) and the test chamber (13); an exhaust port (15) is provided on the top of the cabinet (1), the exhaust port (15) being connected to the ventilation chamber (12); an exhaust fan (121) is provided in the ventilation chamber (12); Two first sliding guide rails (16) are provided on the front side of the outer wall of the cabinet body (1), and the two first sliding guide rails (16) are slidably connected to the cabinet door (21) together; two second sliding guide rails (17) are provided on the back side of the outer wall of the cabinet body (1), and the two second sliding guide rails (17) are slidably connected to the counterweight plate (22) together; The outer wall of the cabinet body (1) is rotatably connected to two rollers (23), one of the rollers (23) is rotatably connected to a chain, one end of the chain is connected to the cabinet door (21), and the other end is connected to the counterweight plate (22); A liquid collecting tank (131) is provided at the bottom of the test chamber (13), a liquid discharge port (132) is provided at the bottom of the liquid collecting tank (131), a liquid discharge port (132) is connected to a liquid discharge pipe (133), and a switch valve (134) is provided on the liquid discharge pipe (133); A workbench (135) is provided in the test chamber (13), and the workbench (135) covers the liquid collecting tank (131), wherein the workbench (135) is provided with a plurality of drainage holes (1351), and a plurality of reinforcing ribs (1352) are provided at the bottom of the workbench (135).

2. A biological safety cabinet according to claim 1, characterized in that: The cabinet door (21) is provided with a first handle (211).

3. A biological safety cabinet according to claim 1, characterized in that: An air outlet hood (122) is provided in the air exchange chamber (12); the air outlet hood (122) is provided on the partition plate (11); a first air outlet (1221) and a second air outlet (1222) are provided on the top of the air outlet hood (122); the first air outlet (1221) is connected to the exhaust fan (121).

4. A biological safety cabinet according to claim 3, characterized in that: Filter screens (18) are respectively provided between the air outlet cover (122) and the partition plate (11) and at the air outlet (15).

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