Closed biological safety cabinet
By setting up primary, medium and high-efficiency filters in the biosafety cabinet, the pollution problem caused by the lack of dust-proof structure in the existing biosafety cabinet is solved, and effective filtration of dust particles and bacteria in the outside air is achieved, ensuring the cleanliness of the experimental products and the accuracy of the experimental results.
Patent Information
- Application Number
- CN202421307899.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-06-11
AI Technical Summary
The existing biosafety cabinet lacks dust-proof structure, which causes dust particles in the outside air and aerosols carrying viruses and bacteria to enter the cabinet directly, contaminating the experimental products, seriously affecting the accuracy of the experimental results.
A closed biosafety cabinet was designed, and the external gases were filtered in sequence through the primary filter, the medium filter and the high-efficiency filter to ensure that dust particles and bacteria in the outside air were prevented from entering the operating chamber during operation and contaminating the experimental products.
Through an effective filtration system, dust particles and bacteria in the outside air are avoided from entering the operating chamber, ensuring the cleanliness of the experimental items and the accuracy of the experimental results. Operators can easily replace filters, improving the efficiency and safety of equipment.
Smart Images
Figure CN222586619U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of biological safety cabinets, and in particular relates to a closed biological safety cabinet. Background Art
[0002] The biological safety cabinet is a box-type air purification negative pressure safety device that can prevent the aerosol dispersion of certain dangerous or unknown biological particles during experimental operations. It is widely used in scientific research, teaching, clinical testing and production in the fields of microbiology, biomedicine, genetic engineering, and biological products. It is the most basic safety protection equipment in the first-level protection barrier of laboratory biosafety.
[0003] Existing biosafety cabinets are not equipped with dust-proof devices. When the device is used, when experimental items are moved into or out of the cabinet, dust particles floating in the outside air and aerosols carrying viruses and bacteria will directly enter the cabinet, contaminating the experimental items and seriously affecting the accuracy of the experimental results. Utility Model Content
[0004] Due to the lack of dust-proof structure in existing biosafety cabinets, dust particles floating in the outside air and aerosols carrying viruses and bacteria will directly enter the cabinet, contaminating the experimental products and seriously affecting the accuracy of the experimental results. The utility model provides a closed biosafety cabinet, in which the outside gas can be effectively filtered through a primary filter, a medium-efficiency filter and a high-efficiency filter in sequence, and when the transfer window is opened to remove experimental items or the vaporized solvent in the operating chamber needs to be sucked, dust particles and bacteria in the outside air and other pollution sources are prevented from contaminating the experimental products.
[0005] The utility model provides the following technical scheme: a closed biological safety cabinet comprises a cabinet body, the interior of the cabinet body is divided into an independent operation chamber, an intermediate chamber and a filtering chamber by an upper isolation plate and a lower isolation plate, an isolation window is fixedly installed on the front face of the cabinet body, and two-hand bare hand cuffs and a single-hand bare hand cuff are fixedly installed on the isolation window, a transfer window is fixedly installed on the rear face of the cabinet body, an isolation strip is fixedly installed on the top face of the upper isolation plate on one side of the transfer window, an air supply duct is fixedly installed on the inner side face of the cabinet body away from the transfer window, the bottom end of the air supply duct passes through one end of the air duct joint and the air distribution duct, the other end of the air duct joint is fixedly connected to the air outlet of the exhaust fan, the exhaust fan is fixedly installed on the bottom face of the lower isolation plate, three groups of filter mounting frames are fixedly installed adjacently on the left and right inside the filtering chamber on one side of the exhaust fan, the three groups of filter mounting frames are sequentially fixedly installed with a primary filter, a medium filter and a high efficiency filter, and an air conditioning door 2 and an air conditioning door 1 are fixedly provided on the lower side of the front face and the side face of the cabinet body respectively.
[0006] Among them, the upper and lower front and rear sides of the filter mounting frame are fitted and welded to the inner bottom surface of the cabinet, the bottom surface of the lower isolation plate and the inner side surface of the cabinet, and the high-efficiency filter is installed at one end of the filter bin away from the exhaust fan; the outside gas can enter the filter bin through the opened air-conditioning door under the suction of the exhaust fan, and be effectively filtered through the primary filter, the medium-efficiency filter and the high-efficiency filter in turn. When the transfer window is opened to remove experimental items or the vaporized solvent in the operation bin needs to be sucked, pollution sources such as dust particles and bacteria in the outside air are prevented from entering the operation bin and contaminating the experimental items.
[0007] Among them, the air-conditioning door 2 is installed on the front end surface of the cabinet between adjacent filter mounting frames, and the air-conditioning door 1 is installed on the side of the cabinet close to the high-efficiency filter; the operator can open the air-conditioning door 1 and the air-conditioning door 2 to conveniently load, unload and replace the primary filter, medium-efficiency filter and high-efficiency filter installed in the filter bin.
[0008] Among them, the isolation window is provided with slots adapted to install double-grooved wrist rings in the double-hand bare-hand cuffs and the single-hand bare-hand cuffs, and the gloves in the double-hand bare-hand cuffs and the single-hand bare-hand cuffs are arranged on the inner side of the operation chamber; the operator can open the door of the transfer window on the inner side of the operation chamber through the double-hand bare-hand cuffs and the single-hand bare-hand cuffs, and safely operate the experimental items isolated in the operation chamber.
[0009] Among them, the front door of the transfer window faces the rear end face of the isolation window, and the other end of the branch air duct passes through one side of the upper isolation plate and passes through the interior of the transfer window; when the exhaust fan is working, the filtered positive pressure gas delivered to the transfer window through the branch air duct can effectively reduce the amount of dust particles entering the interior of the transfer window when the operator opens the door of the transfer window.
[0010] Among them, the front and rear end surfaces of the isolation strip are fixedly attached to the front and rear inner sides of the cabinet; the isolation strip can play a dividing role to prevent the operator from touching the experimental products placed in the operating compartment when opening the inner compartment door of the transfer window.
[0011] Among them, a plurality of air outlet slots arranged in equal sequence are provided on the upper side of the air supply pipe; the positive pressure airflow generated when the exhaust fan is working can be evenly delivered to the operating chamber through the air outlet slots, thereby improving the gas replacement effect.
[0012] The beneficial effects of the utility model are as follows: external air can enter the filter chamber through the opened air-conditioning door 1 under the suction of the exhaust fan, and be effectively filtered through the primary filter, the medium filter and the high-efficiency filter in sequence. When the transfer window is opened to remove experimental items or the vaporized solvent in the operation chamber needs to be sucked, dust particles, bacteria and other pollution sources in the external air are prevented from entering the operation chamber to contaminate the experimental items; the operator can open the air-conditioning door 1 and the air-conditioning door 2 to conveniently load, unload and replace the primary filter, the medium filter and the high-efficiency filter installed in the filter chamber ... Open the door of the transfer window on the inner side of the operation chamber with double-handed bare-hand cuffs or single-handed bare-hand cuffs, and safely operate the experimental items isolated in the operation chamber; when the exhaust fan is working, the filtered positive-pressure gas sent to the transfer window through the air distribution duct can effectively reduce the amount of dust particles entering the transfer window when the operator opens the door of the transfer window; the isolation strip can play a boundary role to prevent the operator from touching the experimental items placed in the operation chamber when opening the inner door of the transfer window; the positive-pressure airflow generated by the exhaust fan when working can be evenly delivered to the operation chamber through the air outlet slot to improve the gas replacement effect.
[0013] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;
[0015] Figure 2 The structure of the utility model is shown in FIG. Figure 2 ;
[0016] Figure 3 It is a longitudinal section view in the utility model;
[0017] In the figure: 1. cabinet; 101. operation compartment; 102. intermediate compartment; 103. filter compartment; 2. isolation window; 3. bare-hand cuffs for both hands; 4. bare-hand cuffs for one hand; 5. transfer window; 6. isolation strip; 7. air supply duct; 701. air outlet slot; 8. duct joint; 9. exhaust fan; 10. lower isolation plate; 11. air distribution duct; 12. filter mounting frame; 13. primary filter; 14. medium filter; 15. high-efficiency filter; 16. air-conditioning door one; 17. upper isolation plate; 18. air-conditioning door two. DETAILED DESCRIPTION
[0018] See also Figure 1-Figure 3The utility model provides the following technical solutions: a closed biological safety cabinet, comprising a cabinet 1, wherein the interior of the cabinet 1 is separated into mutually independent operation chambers 101, intermediate chambers 102 and filter chambers 103 by an upper isolation plate 17 and a lower isolation plate 10, an isolation window 2 is fixedly installed on the front face of the cabinet 1, and two-hand bare hand cuffs 3 and one-hand bare hand cuffs 4 are fixedly installed on the isolation window 2, a transfer window 5 is fixedly installed on the rear face of the cabinet 1, and an isolation strip 6 is fixedly installed on the top face of the upper isolation plate 17 on one side of the transfer window 5, and the inner side of the cabinet 1 away from the transfer window 5 is fixedly installed. An air supply duct 7 is installed, and the bottom end of the air supply duct 7 passes through the connecting duct joint 8 and one end of the air distribution duct 11, and the other end of the duct joint 8 is fixedly connected to the air outlet of the exhaust fan 9. The exhaust fan 9 is fixedly installed on the bottom surface of the lower isolation plate 10, and three groups of filter mounting frames 12 are fixedly installed adjacent to each other on the left and right inside the filter bin 103 on one side of the exhaust fan 9. The three groups of filter mounting frames 12 are sequentially fixedly installed with a primary filter 13, a medium efficiency filter 14 and a high efficiency filter 15, and the front end face and the lower side of the side of the cabinet 1 are respectively fixed with an air-conditioning door 2 18 and an air-conditioning door 1 16.
[0019] The upper and lower front and rear sides of the filter mounting frame 12 are fitted and welded to the inner bottom surface of the cabinet 1, the bottom surface of the lower isolation plate 10 and the inner side surface of the cabinet 1, and the high-efficiency filter 15 is installed at one end of the filter bin 103 away from the exhaust fan 9; the outside air can enter the filter bin 103 through the opened air-conditioning door 16 under the suction of the exhaust fan 9, and is effectively filtered in turn through the primary filter 13, the medium-efficiency filter 14 and the high-efficiency filter 15. When the transfer window 5 is opened to remove the experimental items or the vaporized solvent in the operating bin 101 needs to be sucked, pollution sources such as dust particles and bacteria in the outside air are prevented from entering the operating bin 101 and contaminating the experimental items.
[0020] The air conditioning door 2 18 is installed on the front end surface of the cabinet 1 between adjacent filter mounting frames 12, and the air conditioning door 1 16 is installed on the side of the cabinet 1 close to the high-efficiency filter 15; the operator can open the air conditioning door 16 and the air conditioning door 2 18 to conveniently load, unload and replace the primary filter 13, the medium-efficiency filter 14 and the high-efficiency filter 15 installed in the filter bin 103.
[0021] The isolation window 2 is provided with slots adapted to fit the double-grooved wrist rings in the two-hand bare hand cuff 3 and the single-hand bare hand cuff 4, and the gloves in the two-hand bare hand cuff 3 and the single-hand bare hand cuff 4 are arranged on the inner side of the operation chamber 101; the operator can open the door of the transfer window 5 on the inner side of the operation chamber 101 through the two-hand bare hand cuff 3 and the single-hand bare hand cuff 4, and safely operate the experimental items isolated in the operation chamber 101.
[0022] The front door of the transfer window 5 faces the rear end face of the isolation window 2, and the other end of the branch air duct 11 passes through one side of the upper isolation plate 17 and passes through the interior of the transfer window 5; when the exhaust fan 9 is working, the filtered positive-pressure gas delivered to the transfer window 5 through the branch air duct 11 can effectively reduce the amount of dust particles entering the interior of the transfer window 5 when the operator opens the door of the transfer window 5.
[0023] The front and rear end surfaces of the isolation strip 6 are fixedly attached to the front and rear inner side surfaces of the cabinet 1; the isolation strip 6 can play a dividing role to prevent the operator from touching the experimental products placed in the operating compartment 101 when opening the inner compartment door of the transfer window 5.
[0024] The upper side of the air supply pipe 7 is provided with a plurality of air outlet slots 701 arranged in an equal sequence; the positive pressure airflow generated by the exhaust fan 9 when working can be evenly delivered to the operating chamber 101 through the air outlet slots 701, thereby improving the gas replacement effect.
[0025] The working principle and use process of the utility model are as follows: after connecting the air duct joint 8 to the exhaust pipe, the operator first opens the air conditioning door 16, and then starts the exhaust fan 9. At this time, the exhaust fan 9 sucks the gas in the filter bin 103, and draws the external gas into the filter bin 103 through the air conditioning door 16, and filters it in turn through the primary filter 13, the medium efficiency filter 14, and the high efficiency filter 15. A part of the clean gas after filtration enters the transfer window 5 through the air distribution pipe 11, so that a positive pressure relative to the outside is generated inside the transfer window 5, and then the door of the transfer window 5 located on the outside of the cabinet 1 is opened, and the required experimental instruments and solvents are placed in the transfer window 5. After closing the door, the self-equipped ultraviolet lamp of the transfer window 5 is turned on to enter Disinfection is performed, and then the operator turns off the exhaust fan 9 to avoid ineffective waste of energy; after the transfer window 5 is disinfected, the operator inserts his right hand into the single-hand bare hand cuff 4, opens the door of the transfer window 5 located on the inner side of the cabinet 1, takes out the disinfected items and places them on the upper isolation plate 17, and then inserts both hands into the two-hand bare hand cuffs 3 to conduct the experiment; when it is necessary to suck the vaporized solvent in the operating chamber 101, the operator turns on the exhaust fan 9, at this time, a part of the positive pressure clean gas generated when the exhaust fan 9 is working enters the air supply pipe 7 through the air duct joint 8, and then is evenly delivered to the operating chamber 101 through the air outlet groove 701, and enters the air duct joint 8 together with the vaporized solvent for subsequent exhaust gas purification treatment.
Claims
1. A closed biological safety cabinet, characterized in that: The cabinet comprises a cabinet body, the interior of which is divided into a mutually independent operation compartment, an intermediate compartment and a filter compartment by an upper isolation plate and a lower isolation plate, an isolation window is fixedly installed on the front face of the cabinet body, and two-hand bare-hand cuffs and a single-hand bare-hand cuff are fixedly installed on the isolation window, a transfer window is fixedly installed on the rear face of the cabinet body, an isolation strip is fixedly installed on the top face of the upper isolation plate on one side of the transfer window, an air supply duct is fixedly installed on the inner side face of the cabinet body away from the transfer window, the bottom end of the air supply duct is connected through an air duct joint and one end of the air distribution duct, the other end of the air duct joint is fixedly connected to the air outlet of an exhaust fan, the exhaust fan is fixedly installed on the bottom face of the lower isolation plate, three groups of filter mounting frames are fixedly installed adjacent to each other on the left and right sides of the filter compartment on one side of the exhaust fan, and the three groups of filter mounting frames are sequentially fixedly installed with a primary filter, a medium-efficiency filter and a high-efficiency filter, and an air-conditioning door 2 and an air-conditioning door 1 are fixedly provided on the lower side of the front face and the side face of the cabinet body respectively.
2. A closed biological safety cabinet according to claim 1, characterized in that: The upper and lower front and rear sides of the filter mounting frame are fitted and welded to the inner bottom surface of the cabinet, the bottom surface of the lower isolation plate and the inner side surface of the cabinet. The high-efficiency filter is installed at one end of the filter bin away from the exhaust fan.
3. A closed biological safety cabinet according to claim 1, characterized in that: The second air-conditioning door is installed on the front end surface of the cabinet between adjacent filter mounting frames, and the first air-conditioning door is installed on the side of the cabinet close to the high-efficiency filter.
4. A closed biological safety cabinet according to claim 1, characterized in that: The isolation window is provided with slots adapted to fit the double-grooved wrist rings in the double-hand bare-hand cuffs and the single-hand bare-hand cuffs, and the gloves in the double-hand bare-hand cuffs and the single-hand bare-hand cuffs are arranged on the inner side of the operating chamber.
5. The closed biological safety cabinet according to claim 1, characterized in that: The front door of the transfer window faces the rear end face of the isolation window, and the other end of the air distribution duct passes through one side of the upper isolation plate and passes through the interior of the transfer window.
6. A closed biological safety cabinet according to claim 1, characterized in that: The front and rear end surfaces of the isolation strip are fixedly attached to the front and rear inner side surfaces of the cabinet.
7. A closed biological safety cabinet according to claim 1, characterized in that: A plurality of air outlet slots arranged in equal sequence are provided on the upper side of the air supply pipe.