Secondary biological safety cabinet

Abstract

The utility model discloses a secondary biological safety cabinet which comprises a safety cabinet body, a storage cabin and a disinfection cabin are arranged in the safety cabinet body, a partition plate is inserted in the safety cabinet body and located between the storage cabin and the disinfection cabin, a movable frame is assembled in the storage cabin, and opening and closing doors are assembled on the front side walls of the storage cabin and the disinfection cabin respectively. And a disinfection mechanism is fixedly assembled in the disinfection cabin. According to the culture dish disinfection device, disinfection liquid is more uniformly distributed on the surface of a culture dish, the disinfection effect on the culture dish is improved, the culture dish can be independently disinfected, the situation that the preservation environment in the preservation cabin is affected due to cross contamination in the preservation cabin is avoided, and meanwhile compared with manual disinfection of the culture dish, the disinfection efficiency is greatly improved. By adopting the culture dish disinfection device, the culture dishes can be disinfected before being put into the preservation cabin and after being taken out of the preservation cabin, the operation is simpler and more convenient, and the disinfection efficiency of the culture dishes is improved.

Description

Technical Field

[0001] This utility model relates to the field of biosafety cabinet technology, specifically to a level 2 biosafety cabinet. Background Technology

[0002] A Class II biosafety cabinet is used for culturing and observing microorganisms. Before placing culture dishes into the cabinet for preservation and when removing them, the dishes need to be sterilized. Traditional sterilization methods mostly involve manual sterilization or using a sterilization mechanism within the preservation chamber. Manual sterilization is often incomplete, while placing the sterilization mechanism within the preservation chamber can contaminate and damage the preservation environment during sterilization, thus affecting the subsequent use of the preservation chamber. Therefore, we propose a Class II biosafety cabinet. Utility Model Content

[0003] The purpose of this invention is to provide a Level 2 biosafety cabinet to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a level 2 biosafety cabinet, comprising a cabinet body, wherein a storage compartment and a disinfection compartment are provided inside the cabinet body, a partition is inserted inside the cabinet body, the partition is located between the storage compartment and the disinfection compartment, a movable frame is installed inside the storage compartment, and a switch door is installed on the front side wall of the storage compartment and the disinfection compartment respectively, and a disinfection mechanism is fixedly installed inside the disinfection compartment;

[0005] The disinfection mechanism includes a liquid storage tank, a support frame is fixedly mounted on the bottom of the liquid storage tank, a liquid outlet pipe is fixedly connected between the bottom of the liquid storage tank and the disinfection chamber, a control valve is fixedly mounted inside the liquid outlet pipe, a connecting pipe is fixedly connected to the bottom of the liquid outlet pipe, a mounting frame is fixedly connected to the bottom of the connecting pipe, and liquid storage nozzles are evenly fixedly mounted on the bottom of the mounting frame.

[0006] Preferably, the bottom of the disinfection chamber is provided with a drainage trough, and a drainage pipe is fixedly connected to the bottom of the drainage trough.

[0007] Preferably, the mobile frame includes a mobile frame body, with moving wheels fixedly mounted at the four bottom corners of the mobile frame body, and handles symmetrically distributed on the left and right sides fixedly mounted on the top of the mobile frame body. A support shaft is fixedly connected to the top of the mobile frame body, and a placement plate is fixedly connected to the top of the support shaft. Placement grooves are evenly formed on the surface of the placement plate.

[0008] Preferably, the main body of the mobile frame has an opening groove, the surface of the placement plate has drainage holes evenly distributed, and a connecting groove is provided between the drainage holes and the placement groove.

[0009] Preferably, the left and right side walls of the mobile frame body are respectively fixedly equipped with adsorption iron blocks, and the left side wall of the inner cavity of the storage compartment and the right side wall of the inner cavity of the disinfection compartment are fixedly equipped with magnet blocks.

[0010] Preferably, an observation window is embedded in the switch door.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: A level 2 biosafety cabinet, compared with traditional biosafety cabinets, firstly sets up the preservation chamber and the disinfection chamber independently. The disinfection chamber is equipped with a disinfection mechanism that can disinfect petri dishes in batches. This not only makes the disinfectant solution more evenly distributed on the surface of the petri dishes, improving the disinfection effect, but also allows for independent disinfection of the petri dishes, avoiding cross-contamination with the preservation chamber and thus affecting the preservation environment. At the same time, compared with manual disinfection of petri dishes, this utility model can disinfect petri dishes before they are placed in the preservation chamber and after they are taken out of the preservation chamber, making the operation simpler and more convenient, and improving the disinfection efficiency of petri dishes. Attached Figure Description

[0012] Figure 1 This is a perspective view of the present invention.

[0013] Figure 2 This is a structural diagram showing the assembly of the partition and the main body of the safety cabinet according to this utility model.

[0014] Figure 3 This is a schematic diagram of the connection between the preservation chamber and the disinfection chamber of this utility model.

[0015] Figure 4 This is a perspective view of the mobile frame of this utility model.

[0016] Figure 5 This is a schematic diagram of the structure of the mobile frame of this utility model.

[0017] Figure 6 This is a schematic diagram of the disinfection mechanism of this utility model.

[0018] Figure 7 This is a schematic diagram of the liquid outlet nozzle of this utility model.

[0019] In the diagram: 1. Safety cabinet body; 2. Storage compartment; 3. Disinfection compartment; 4. Partition; 41. Handle lever; 5. Opening / closing door; 6. Observation window; 7. Moving frame; 71. Moving frame body; 72. Moving wheels; 73. Handle bracket; 74. Support shaft; 75. Placement plate; 76. Placement slot; 77. Opening slot; 78. Drain hole; 79. Connecting slot; 8. Drain pipe; 9. Disinfection mechanism; 91. Storage tank; 92. Support frame; 93. Discharge pipe; 94. Control valve; 95. Connecting pipe; 96. Mounting frame; 97. Discharge nozzle; 10. Adsorption iron block; 11. Magnet block; 12. Drain trough. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 This utility model provides a technical solution: a level 2 biosafety cabinet, including a cabinet body 1, a storage compartment 2 and a disinfection compartment 3 inside the cabinet body 1, a partition 4 inserted between the storage compartment 2 and the disinfection compartment 3, the partition 4 separating the storage compartment 2 and the disinfection compartment 3, a handle 41 welded and fixed to the side wall of the partition 4, the handle 41 facilitating the assembly of the partition 4, a switch door 5 hinged to the front side wall of the storage compartment 2 and the disinfection compartment 3 respectively, the switch door 5 for sealing the storage compartment 2 and the disinfection compartment 3, an observation window 6 embedded in the switch door 5, the observation window 6 for observing the internal environment of the storage compartment 2 and the disinfection compartment 3.

[0022] An air filtration system is installed in the storage compartment 2 of the main body 1 of the safety cabinet. This system is crucial for ensuring the performance of the equipment. It consists of a drive fan, air ducts, a circulating air filter, and an exhaust air filter. Its main function is to continuously introduce clean air into the working chamber, ensuring that the downward airflow (vertical airflow) velocity in the working area is no less than 0.3 m / s, guaranteeing a cleanliness level of Class 100 within the working area. Simultaneously, it purifies the exhaust air to prevent environmental pollution. The core component of this system is a HEPA filter, which uses a special fire-resistant material for its frame. The frame is divided into grids by corrugated aluminum sheets, filled with emulsified glass fiber subparticles, achieving a filtration efficiency of 99.99%–100%. A pre-filter or pre-filter at the air inlet pre-filters and purifies the air before it enters the HEPA filter, extending its lifespan.

[0023] External exhaust fan system: The external exhaust fan system consists of an external exhaust fan housing, a fan, and exhaust ducts. The external exhaust fan provides the power to exhaust air, drawing out unclean air from the working chamber. The air is then purified by the external exhaust filter, thus protecting the samples and experimental items inside the cabinet. Due to the external exhaust effect, the working chamber is under negative pressure, preventing air from escaping from the working area and protecting the operator.

[0024] The above-mentioned system structures are all structural features commonly used in existing Level 2 biosafety cabinets, and therefore are not shown in the accompanying drawings of this application.

[0025] like Figure 3 As shown, the storage chamber 2 and the sterilization chamber 3 are equipped with a movable frame 7 that can move along its inner cavity. The movable frame 7 is used to place the petri dishes. Adsorption iron blocks 10 are welded and fixed to the left and right side walls of the movable frame 7, respectively. Magnet blocks 11 are fixedly connected to the left side wall of the inner cavity of the storage chamber 2 and the right side wall of the inner cavity of the sterilization chamber 3, respectively. The adsorption iron blocks 10 and the magnet blocks 11 are located at the same height. By setting the adsorption iron blocks 10 and the magnet blocks 11, the stability of the movable frame 7 in the fixed position in the storage chamber 2 or the sterilization chamber 3 can be enhanced.

[0026] like Figure 4 As shown, the mobile frame 7 includes a mobile frame body 71. The four corners of the bottom of the mobile frame body 71 are fixedly equipped with moving wheels 72. The moving wheels 72 are used to assist the movement of the mobile frame body 71 in the storage chamber 2 and the disinfection chamber 3. The top of the mobile frame body 71 is symmetrically welded and fixed with handles 73 on the left and right sides. The handles 73 are designed to cooperate with the moving wheels 72 to assist the movement of the mobile frame body 71. The top of the mobile frame body 71 is welded and fixed with a support shaft 74. The top of the support shaft 74 is fixedly connected with a placement plate 75. The surface of the placement plate 75 is evenly provided with placement grooves 76 for placing petri dishes.

[0027] like Figure 4 and Figure 5 As shown, the main body 71 of the mobile frame has an opening groove 77 in the middle, which is used for the downward discharge of disinfectant. Drainage holes 78 are evenly distributed in the placement plate 75, and a connecting groove 79 is provided between the drainage holes 78 and the placement groove 76. By setting the drainage holes 78 and the connecting groove 79, excess disinfectant waste liquid during the disinfection process can enter the opening groove 77 below for centralized discharge.

[0028] like Figure 6 and Figure 7 As shown, a disinfection mechanism 9 is fixedly installed inside the disinfection chamber 3. The mobile rack 7 entering the disinfection chamber 3 can be disinfected through the disinfection mechanism 9. This method is more labor-saving than the traditional method of removing the culture dish for disinfection and can improve the comprehensiveness of the disinfection of the culture dish.

[0029] The disinfection mechanism 9 includes a storage tank 91, with a support frame 92 fixedly mounted at the bottom. The storage tank 91 is fixedly mounted to the top of the main body 1 of the safety cabinet via the support frame 92. A liquid injection pipe is fixedly connected to the top of the storage tank 91 for adding disinfectant into the storage tank 91. A cap is snapped onto the top of the liquid injection pipe to seal it. An outlet pipe 93 is fixedly connected between the bottom of the storage tank 91 and the top of the disinfection chamber 3. A control valve 94 is fixedly mounted inside the outlet pipe 93. The control valve 94 is electrically connected to an external power supply and an external controller. The control valve 94 is a flow control valve, and its opening and closing can be controlled by the external controller. The system allows for control and adjustment of the liquid flow rate of the control valve 94. One end of the connecting pipe 95 is fixedly connected to the bottom of the liquid outlet pipe 93, and the other end of the connecting pipe 95 is fixedly connected to the mounting bracket 96. Liquid outlet nozzles 97, which communicate with the inner cavity of the mounting bracket 96, are evenly fixedly installed at the bottom of the mounting bracket 96. The connecting pipe 95 is connected to the inner cavity of the mounting bracket 96. The storage tank 91 is used to store the disinfectant. When the control valve 94 is opened, the disinfectant enters the inner cavity of the mounting bracket 96 through the liquid outlet pipe 93 and the connecting pipe 95 in sequence. Then, the disinfectant is sprayed onto the surface of the petri dish through the liquid outlet nozzles 97 evenly arranged at the bottom of the mounting bracket 96, ensuring the comprehensive disinfection of the petri dish below.

[0030] A drain trough 12 is provided at the bottom of the disinfection chamber 3. A drain pipe 8 that runs through the main body 1 of the safety cabinet is fixedly connected to the bottom of the drain trough 12. Waste liquid generated during the disinfection process can be collected through the drain trough 12 and discharged to the outside through the drain pipe 8 for centralized treatment.

[0031] Working principle: When using this invention to preserve microorganisms, before preservation, the partition 4 is removed via the handle 41. Then, the movable frame 7 is moved into the disinfection chamber 3, and the partition 4 is moved back. After closing the switch door 5, the disinfection mechanism 9 is turned on. By opening the control valve 94 inside the disinfection mechanism 9, disinfectant is sprayed downwards from the outlet nozzle 97 to disinfect the culture dishes before preservation in the disinfection chamber 3. After disinfection, the partition 4 is removed, and then the switch door 5 of the disinfection chamber 3 is opened, and the movable frame 7 is moved back. Push the culture dish into the preservation chamber 2, and reset the partition 4 to form a closed space for preserving the microbial culture dish. When it is necessary to remove the culture dish from the preservation chamber 2 after preservation, first open the switch door 5 of the disinfection chamber 3, then pull the partition 4 outward and drag the moving frame 7 to re-enter the disinfection chamber 3. Reset the partition 4 to form a sealed environment in the disinfection chamber 3, and then open the disinfection mechanism 9. The disinfection mechanism 9 will disinfect the culture dish. After the disinfection is completed, the culture dish can be removed from the disinfection chamber 3.

Claims

1. A level 2 biosafety cabinet, comprising a cabinet body (1), characterized in that: The main body (1) of the safety cabinet has a storage compartment (2) and a disinfection compartment (3) inside. A partition (4) is inserted into the main body (1) of the safety cabinet. The partition (4) is located between the storage compartment (2) and the disinfection compartment (3). A movable frame (7) is installed in the storage compartment (2). Opening and closing doors (5) are respectively installed on the front side walls of the storage compartment (2) and the disinfection compartment (3). A disinfection mechanism (9) is fixedly installed in the disinfection compartment (3). The disinfection mechanism (9) includes a liquid storage tank (91), a support frame (92) is fixedly mounted on the bottom of the liquid storage tank (91), an outlet pipe (93) is fixedly connected between the bottom of the liquid storage tank (91) and the disinfection chamber (3), a control valve (94) is fixedly mounted inside the outlet pipe (93), a connecting pipe (95) is fixedly connected to the bottom of the outlet pipe (93), an mounting frame (96) is fixedly connected to the bottom of the connecting pipe (95), and liquid storage nozzles (97) are evenly fixedly mounted on the bottom of the mounting frame (96).

2. The Class II biosafety cabinet according to claim 1, characterized in that: The bottom of the disinfection chamber (3) is provided with a drain trough (12), and a drain pipe (8) is fixedly connected to the bottom of the drain trough (12).

3. A Class II biosafety cabinet according to claim 1, characterized in that: The mobile frame (7) includes a mobile frame body (71), with four fixedly mounted mobile wheels (72) at the bottom corners of the mobile frame body (71), and handles (73) symmetrically distributed on the left and right sides fixedly mounted on the top of the mobile frame body (71). A support shaft (74) is fixedly connected to the top of the mobile frame body (71), and a placement plate (75) is fixedly connected to the top of the support shaft (74). Placement grooves (76) are evenly opened on the surface of the placement plate (75).

4. A Class II biosafety cabinet according to claim 3, characterized in that: The main body (71) of the mobile frame is provided with an opening groove (77), and the surface of the placement plate (75) is provided with drainage holes (78) evenly, and a connecting groove (79) is provided between the drainage holes (78) and the placement groove (76).

5. A Class II biosafety cabinet according to claim 3, characterized in that: Adsorption iron blocks (10) are fixedly installed on the left and right side walls of the main body (71) of the mobile frame, and magnet blocks (11) are fixedly installed on the left side wall of the inner cavity of the storage compartment (2) and the right side wall of the inner cavity of the disinfection compartment (3).

6. A Class II biosafety cabinet according to claim 1, characterized in that: An observation window (6) is embedded in the switch door (5).

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