261 results about "Biosafety cabinet" patented technology

The invention provides an intelligent ventilation control method and system for a biological laboratory. The method comprises the steps that if it is monitored that the operation state of an air exhaust system is changed into a shutdown state, first working parameters of a ventilation system of the biological laboratory are determined according to shutdown parameters of the air exhaust system, and the ventilation system is controlled to execute weak air exhaust operation according to the first working parameters; shooting high-definition image data of an operation area of the biological safety cabinet, extracting biological experiment data from the high-definition image data, predicting the generation amount of harmful gas residues according to the biological experiment data, and determining a second working parameter of the ventilation system according to the generation amount of the harmful gas residues, and the ventilation system is controlled to execute strong exhaust operation according to the second working parameter. According to the scheme, after the air exhaust system of the biological safety cabinet is shut down, harmful gas in the biological laboratory can be exhausted by regulating and controlling the ventilation system in the biological laboratory, and it is ensured that a healthy air environment is kept in the biological laboratory all the time.

The utility model discloses a biosafety cabinet capable of double-layer filtration, which comprises a cabinet body, an operation chamber is arranged in the cabinet body, and a bottom air duct is arranged at the bottom end of the operation chamber. By arranging the reducing pipe, the exhaust pipe, the exhaust outlet, the filter box, the exhaust filter, the air disc and the high alcohol, double-layer filtration of exhausted air is achieved, air can be exhausted into the reducing pipe through operation of the exhaust fan, airflow can be concentrated and pressurized through arrangement of the reducing pipe, meanwhile, the air is conveyed into the filter box, and the filtering effect is improved. The air disc divides air into a plurality of small bubbles and increases the contact area with the high-alcohol, the high-alcohol can kill bacteria in the air and adsorb particle dust and various suspended solids, then the air is conveyed into the air exhaust opening, secondary filtering is conducted when the air passes through the air exhaust filter, and the exhausted air is purified; therefore, the exhausted air does not carry germs, the environment is prevented from being polluted, and the use safety is improved.

The invention discloses a biological safety cabinet quality detection system and a method thereof, belongs to the technical field of detection, comprises a detection device and an upper computer, solves the technical problems of dynamically analyzing the flow consistency of a main air duct and a branch air duct and providing accurate information of global suction air flow distribution of the system, ensures the accuracy of flow data, and improves the detection efficiency. The adaptability and data stability of the system under different environmental conditions are remarkably improved, data log generation, alarm prompt and analysis result display are supported, it is ensured that accurate information of global flow distribution of the system is obtained, meanwhile, rapid alarm of abnormal flow distribution is achieved, and turbine rotating speed and liquid flow data are combined.

The utility model provides a biosafety cabinet, which relates to the technical field of biosafety cabinets and comprises a purification part and an operation cabinet arranged at the bottom of the purification part, tempered glass is arranged at the opening end of the operation cabinet, a convex lens is arranged at the top of the tempered glass, a through hole is formed in the surface of the tempered glass, and protective gloves are mounted on the inner wall of the through hole. The side, close to the tempered glass, of the bottom of the inner wall of the operation cabinet is provided with an air filtering pipe, and the side, close to the tempered glass, of the air filtering pipe is provided with a one-way air valve. In the working process of the safety cabinet, an operator can observe objects in the operation cabinet through the convex lens and the tempered glass, air can enter the air filtering pipe through the one-way air valve, impurities are filtered out through the air filtering pipe, then the air enters the operation cabinet, and the operator does not need to additionally wear a plurality of gloves in the operation process; and direct operation is carried out only through the protective gloves.

The application provides a biological safety cabinet, which comprises a cabinet body, a fan assembly and a filter assembly. The cabinet body has a working cavity and an air flow circulation cavity. A partition member is arranged in the cabinet body and is inclined relative to the bottom wall of the cabinet body, so as to divide the air flow circulation cavity into a first circulation cavity and a second circulation cavity. The fan assembly comprises a first fan unit and a second fan unit. The cabinet body is provided with an air outlet and an air inlet. The first fan unit is configured to drive the circulation of the gas in the air flow circulation cavity. The second fan unit is configured to provide a negative pressure for the working cavity. The first fan unit comprises a first bellows. The filter assembly comprises a first filter member. The side wall of the first bellows towards the partition member has an extension direction consistent with the inclination direction of the partition member. The first bellows is rotationally connected with the partition member, so as to mount the first filter member between the air outlet and the first bellows. The biological safety cabinet has different levels of biological safety protection and is convenient to assemble.

The utility model discloses a biosafety cabinet with controllable exhaust air rate, which comprises a cabinet body and an operation room, the cabinet body is provided with a fan, an air inlet, an air outlet and an exhaust outlet, a circulating air duct is formed on the periphery of the operation room, and the tail end of the circulating air duct is respectively provided with an air supply and exhaust high-efficiency filter. The device is characterized in that the air outlet is communicated with the interior of the circulating air duct through an air exhaust duct, and an air exhaust efficient filter is arranged in the air exhaust duct; an adjusting assembly is arranged on the inner side of the air outlet and comprises a movable plate, a differential pressure sensor and a movable plate controller, the movable plate covers the air outlet, and the movable plate controller adjusts the opening degree of the movable plate relative to the air outlet after collecting the detection value of the differential pressure sensor. The adjusting assembly is arranged at the exhaust outlet, the opening degree of the movable plate is controlled by detecting the pressure difference change, the exhaust air rate is stable, and the use safety is improved.

The utility model discloses a biosafety cabinet with a dust cover, which comprises positioning support blocks fixedly connected to the left side and the right side of the biosafety cabinet, the surfaces of the two positioning support blocks are rotatably connected with positioning connecting pieces, and the dust cover is fixedly connected between the two positioning connecting pieces. The left side of the dust cover is fixedly connected with a thickened connecting block, the rear side of the thickened connecting block is welded with a round head plate, the left side of the biological safety cabinet is fixedly connected with a perforated L-shaped plate through a bolt, and an inner cavity of the perforated L-shaped plate is slidably connected with a round rod. The dust cover pushes the round rod to slide backwards, then the resilience force of the spring pushes the round rod and the inclined surface block to reset, and then the positions of the round head plate and the dust cover are fixed, so that the purpose that the operation window is subjected to dust prevention treatment before and after use, and the interior of the biological safety cabinet can be better kept in a clean state can be achieved.

The utility model belongs to the technical field of biological safety cabinets, and particularly relates to a closed type biological safety cabinet which comprises a cabinet body, the interior of the cabinet body is divided into an operation bin, a middle bin and a filtering bin which are mutually independent through an upper isolation plate and a lower isolation plate, and an isolation window installed at the front end of the cabinet body is provided with a two-hand bare-hand oversleeve and a single-hand bare-hand oversleeve. A delivery window is installed at the rear end of the cabinet body, the bottom end of an air supply pipe installed in the cabinet body is connected with an air pipe connector and one end of an air distribution pipe, three sets of filter installation frames are installed on one side of an exhaust fan connected with the other end of the air pipe connector in a left-right adjacent mode, and a primary filter, a medium-efficiency filter and a high-efficiency filter are installed on the three sets of filter installation frames. The lower side of the cabinet body is provided with the second air-conditioning door and the first air-conditioning door, external air can be effectively filtered through the primary filter, the medium-efficiency filter and the high-efficiency filter in sequence, and when the delivery window is opened to move experimental articles or a vaporized solvent in the operation bin needs to be sucked, the experimental articles are prevented from being polluted by pollution sources such as dust particles and bacteria in the external air.

The utility model relates to the technical field of biosafety cabinets, and discloses a biosafety cabinet convenient to replace a filter screen, which comprises a fixed bottom plate, a biosafety cabinet main body and an air supply box, an air supply fan is mounted at the top end of the air supply box, and a filter screen is fixed in a flow distribution hole. The air supply box is installed at the top end of the biological safety cabinet body, the air supply fan is used for supplying air in the working process, air is filtered through the air filter in the air supply process, and when the air filter is used for a period of time and needs to be replaced and cleaned, the air filter can be moved out after the handle is held. The air filter is moved out of the slot after moving along the limiting plate, then the air filter is correspondingly cleaned or replaced, and then the air filter is re-inserted from the slot and is re-mounted along the limiting plate; and the sealing blocks are used for sealing the side edges, so that the overall replacement and cleaning convenience is better improved in the working process.

The invention discloses a laboratory ventilation system, and belongs to the technical field of laboratory equipment. Comprising a biological safety cabinet ventilation system and a whole house ventilation system, the biological safety cabinet ventilation system comprises a cabinet body air inlet pipe, a cabinet body air outlet pipe, a cabinet body air inlet pump, a cabinet body air outlet pump and a filter box. The whole house ventilation system comprises an air inlet pipe, an air outlet pipe, an air inlet pump, an air outlet pump and a filtering assembly. According to the difference of ventilation air requirements of the specified area and the whole area, ventilation guiding and exhausting operation is carried out in a differentiated mode; the internal environment of the laboratory is ventilated and air is clean; and for the biosafety cabinet, the higher level of ventilation air is clean and sterile. The ventilation system solves the problems that although an existing ventilation system of a laboratory is respectively provided with a regional ventilation system and a whole-house ventilation system, only the discharge end is substantially distinguished, the two systems adopt the same guiding and discharging control system, the provided air quality is the same, and the ventilation system is possibly not suitable for the ventilation standard in a biological safety cabinet.

The application belongs to the technical field of experimental equipment, and particularly relates to a biological safety cabinet. The application aims to solve the problem that the biological safety cabinet can only meet single experimental requirements and needs to be configured with multiple types of biological safety cabinets. The biological safety cabinet of the application has the following advantages. Part of the gas in the working area enters the circulating air duct through the air inlet and enters the working area again through the air outlet, and is recycled, which is conducive to reducing power consumption. Another part of the gas in the working area enters the exhaust air duct through the air inlet and is discharged through the indoor air outlet or the outdoor air outlet. When the outdoor air outlet is used for air exhaust, it is suitable for experiments of harmful chemical gas, chemical volatile gas and the like. When the indoor air outlet is used for air exhaust, it is conducive to improving the cleanliness of the air of the first workbench area and is suitable for standard microorganism experiments and the like. The biological safety cabinet of the application has low power consumption, is suitable for experiments with different requirements, and has a wide application range.

The utility model relates to a biological safety cabinet technical field, concretely relates to a biological safety cabinet internal wind circulation structure, include: wind circulation part, set up at the safety cabinet cabinet body top wind circulation cavity department, including the top bracket and bottom bracket of up and down parallelly arranged, bottom bracket with top bracket on respectively install a plurality of circulating fan, this biological safety cabinet internal wind circulation structure, can form independent wind circulation in wind circulation cavity through the wind circulation part that is equipped with, and can improve the distribution uniformity of airflow based on the distribution structure of circulating fan, simultaneously, this wind circulation structure can keep wind circulation protection performance, and it is convenient for compression reduces the cabinet body space height, can improve the passability of biological safety cabinet in turn.

Relates to the field of safety cabinets, and discloses a biological safety cabinet with a steel wire rope anti-falling device, which comprises a safety cabinet, a box door movably arranged on the safety cabinet, a steel wire rope arranged at the upper end of the box door and a balancing weight arranged on the rear side of the safety cabinet and connected with the steel wire rope. The guide wheel device is arranged at the upper part of the safety cabinet, is connected with the steel wire rope and is used for guiding the steel wire rope; the guide wheel box is arranged at the upper end of the safety cabinet and used for protecting the guide wheel device; according to the guide wheel device for the biological safety cabinet, the steel wire rope is effectively prevented from loosening or falling off from the guide wheel device in the using process, and therefore the operation safety of the biological safety cabinet is remarkably improved.

The invention relates to the technical field of biological laboratory automatic treatment, and discloses a double-fan biological safety cabinet which comprises a cabinet body, an inner container is arranged below the cabinet body, a pressure inlet cavity and a negative pressure cavity are formed in the upper portion of the cabinet body, the pressure inlet cavity is communicated to an upper air inlet of the inner container through a lower efficient filter, and the negative pressure cavity is communicated to a lower air outlet of the inner container through a lower efficient filter. A side cavity is formed between the rear side edge of the inner container and the cabinet body, the bottom of the side cavity is communicated to the interior of the inner container through side discharging holes in the lower portion of the inner container, a first centrifugal fan and a second centrifugal fan are arranged in the negative pressure cavity, and air inlets of the first centrifugal fan and the second centrifugal fan are both located in the negative pressure cavity. An air outlet of the first centrifugal fan is located in the pressure inlet cavity, and an air outlet of the second centrifugal fan is communicated to the outside of the cabinet body through an upper efficient filter above the cabinet body. Positive pressure is generated through the pressure inlet cavity, negative pressure is generated through the negative pressure cavity, circulating air is formed in the inner container, and accurate adjustment of the negative pressure in the inner container is achieved through the two centrifugal fans.

The utility model discloses a biosafety cabinet with an exhaust device, which relates to the technical field of biosafety cabinets, and comprises a biosafety cabinet body, an adjusting component is arranged on one side of the biosafety cabinet body close to an exhaust component, the adjusting component comprises a support plate, an eccentric shaft is arranged at the bottom of the support plate, and the exhaust device is arranged on the eccentric shaft. A connecting shaft is fixed to the eccentric shaft, an arc-shaped rod is connected to the side, away from the eccentric shaft, of the connecting shaft, a fixing ring is arranged on the side, away from the connecting shaft, of the arc-shaped rod, a second clamping base is arranged on the biological safety cabinet body, and a sliding rail is arranged on the biological safety cabinet body and inserted into the second clamping base and the fixing ring. A baffle is slidably connected into the sliding rail, a lantern ring is fixed to the top of the baffle, the bottom of the arc-shaped rod is fixed into the lantern ring, the adjusting assembly is arranged, different experiments may need bolts, different airflow speeds and directions are achieved, and the adjustable exhaust outlet provides higher flexibility and adaptability.

The utility model belongs to the technical field of biological safety cabinets, and particularly relates to a laboratory biological safety cabinet which comprises a base, a safety cabinet body is vertically connected right above the base in a sliding mode, two symmetrically-arranged storage grooves are formed in the surface of the base, and protection mechanisms are arranged in the storage grooves. The front position of the safety cabinet body is blocked by arranging the protection mechanism, the placement frame and the warning tape, personnel are prevented from mistakenly entering the area of the safety cabinet body, the personnel are prevented from approaching and driving air to flow, the probability of cross contamination between the personnel and samples or between the samples is further reduced, and the working efficiency is improved. The safety cabinet has the advantages that the safety cabinet is simple in structure and convenient to use, the accuracy of the safety cabinet body in the test process is improved, the safety and stability of the safety cabinet body in use and the accuracy in the subsequent test process are guaranteed, the occupied area can be reduced when the safety cabinet body is not used, the safety cabinet body can be quickly unfolded when needed, meanwhile, the placement frame can be stably stored, and the equipment convenience is improved.

This invention discloses a biosafety cabinet with an ultraviolet (UV) disinfection lamp, comprising a cabinet body and an air filtration device disposed above the cabinet body. Below the air filtration device is a working area. A sliding window is provided on the front side of the cabinet body. The key feature is that an UV lamp device is provided within the working area. The UV lamp device includes a flip-up plate, a traction mechanism, and a mounting compartment. A partition chamber is provided between the inner side panel of the working area and the back panel of the cabinet body. The mounting compartment is located within the partition chamber, with one end hinged to the inner side panel via the flip-up plate, and the other end connected to the sliding window via the traction mechanism. The UV lamp is disposed within the mounting compartment and gains the freedom to rotate from the partition chamber to the working area through the rotation of the flip-up plate. In this invention, the UV lamp switches between the partition chamber and the working area via the mounting compartment, avoiding interference with airflow and improving the safety of UV disinfection.

The utility model relates to the technical field of biosafety cabinets, in particular to an air supply device and a biosafety cabinet, the air supply device comprises a static pressure box, a filter plate and a first fan, the static pressure box comprises a box body, the lower end of the box body is provided with a downward air outlet, and the filter plate is connected to the lower end of the box body to block the air outlet; the first fan is fixed to the outer side of the box body, an air outlet of the first fan is communicated with an inner cavity of the box body, the air outlet faces the filter plate and is obliquely arranged downwards, the first fan is arranged on one side of the static pressure box, the total height of the air supply device is reduced, and the air outlet of the fan faces the filter plate and is obliquely arranged downwards. According to the filter plate, air blown out of the fan can be obliquely blown to the upper end face of the filter plate, compared with the mode that the air outlet is perpendicular to the filter plate, the direct contact area of the air blown out of the fan and the filter plate is increased through the obliquely-arranged air outlet, and the filtering efficiency of the filter plate is conveniently improved.

The utility model relates to the technical field of biological experiment instruments, in particular to a hanging accessory used in the separation process of umbilical cord blood hematopoietic stem cells, which is mainly used for being connected with a grid at the top of a biological safety cabinet and comprises a fixed end connected with the grid at the top of the biological safety cabinet, and a hook used for being connected with a blood bag is arranged below the fixed end. The fixing end comprises a clamping ring, a torsional spring clamping opening capable of being clamped into a grid is formed in the clamping ring, a limiting sliding groove is formed in the inner side of the clamping ring, and a limiting rod capable of moving up and down along the inner wall of the clamping ring is slidably connected into the limiting sliding groove. A reset spring capable of resetting the limiting rod upwards is arranged between the bottom of the limiting sliding groove and the limiting rod. The technical problems that in the prior art, a blood bag is connected with a grid in a biological safety cabinet through a paper clip, then the blood bag is hung, shaking is large, the blood bag is prone to falling off, a sample possibly needs to be centrifuged many times, and the motility rate of the sample is affected are solved.

The application discloses a biosafety cabinet high-efficiency filter replacement operation method and relates to the technical field of biosafety cabinets.The existing filter purifies air through filtration, so as to ensure the cleanness of the biosafety cabinet.However, the filter needs to be replaced when the purification effect is poor, and the filter needs to be replaced for a period of time, so that the high replacement frequency brings inconvenience to the use of the biosafety cabinet.The application purifies air through the arrangement of different cover plates in sequence, and the dust in the air is removed during the purification.However, bacteria and other microorganisms are accompanied in the dust and other impurities, and the pre-treatment of the bacteria and microorganisms can avoid the delivery into the biosafety cabinet, so that the cleanness of the biosafety cabinet is ensured.The replacement of the biosafety cabinet filter is usually because the ideal filtering effect cannot be achieved, so that the filter needs to be replaced, the filtering effect is improved, the filter life is prolonged, the replacement operation frequency is reduced, and the operation is relatively more convenient.

The utility model relates to the technical field of safety cabinets, and discloses a multifunctional double biological safety cabinet which comprises a cabinet body, two symmetrical fixing plates are fixedly connected to the interior of the cabinet body, a top plate is fixedly connected to the tops of the two fixing plates, adjusting grooves extending out of the fixing plates are formed in the two fixing plates, and the top plate is fixedly connected to the tops of the two fixing plates. The multifunctional double-person biosafety cabinet comprises a push frame, an adjusting groove is formed in the push frame, two symmetrical connecting frames are connected to the interior of the adjusting groove in a sliding mode, a sliding rail is fixedly connected to one side of each connecting frame, and a containing plate is connected to the interior of each sliding rail in a sliding mode. The push frame can position and fix the test tubes in the placing groove through the convex blocks, the test tubes can be placed more stably and firmly, meanwhile, the convex blocks are driven to move through the transmission wheel connecting frame, workers can position the test tubes at the same time after placing one row of test tubes at the same time, and therefore the test tubes are more convenient to position.

The utility model relates to the technical field of PCR (Polymerase Chain Reaction) inspection, and discloses a biological safety cabinet for PCR inspection, which comprises a safety cabinet body, a plurality of transverse storage cavities are distributed in the safety cabinet body at equal intervals, a longitudinal conveying channel is longitudinally arranged in the safety cabinet body, and the transverse storage cavities are communicated with the longitudinal conveying channel. The interior of the longitudinal conveying channel communicates with the interiors of the transverse storage cavities, an opening is formed in one end of the longitudinal conveying channel, the opening of the longitudinal conveying channel is formed in the exterior of the safety cabinet body, and a driving assembly is installed in the longitudinal conveying channel; a conveyor connected with the driving assembly is movably mounted in the longitudinal conveying channel, an ultraviolet lamp is mounted in the conveyor, a to-be-detected container is placed in the conveyor, and the ultraviolet lamp is mounted in the conveyor, so that air entering the conveyor and the surface of the container can be sterilized; and bacteria are prevented from entering the safety cabinet body.

The utility model relates to the technical field of carriers, in particular to a carrier of a biological safety cabinet for dispensing, which comprises a liftable hand-push forklift, a limiting mechanism is arranged on the hand-push forklift, the limiting mechanism comprises a fixing block fixedly arranged on the hand-push forklift, a limiting frame is slidably arranged on the fixing block, and the limiting frame is fixedly arranged on the hand-push forklift. A side plate is arranged on the side, away from the limiting frame, of the fixing block, and the limiting frame and the side plate abut against the two sides of the safety cabinet correspondingly so as to fix the safety cabinet. And the locking assembly is used for locking the limiting frame. Through the arranged limiting mechanism, the safety cabinet is placed on the fixing block on the hand-push forklift, the hand-push forklift is lifted, the safety cabinet is lifted, the limiting frame is moved towards the side plate, the limiting frame and the side plate abut against the two sides of the safety cabinet correspondingly, the position of the limiting frame is locked through the locking assembly, and therefore the safety cabinet is limited; the safety cabinet is prevented from sliding and being damaged in the moving process of the hand-push forklift, and potential safety hazards are eliminated.

The invention provides a gonococcus transport and preservation method, which comprises the following steps: step 1, taking out one strain which is not freeze-dried from an ultralow-temperature refrigerator, placing the strain at room temperature for later use, after the strain is slightly dissolved, taking out a certain amount of bacterial liquid from a biosafety cabinet by using a pipettor, inoculating the bacterial liquid onto a pre-heated culture medium, marking lines in four regions, and then placing the culture medium in an incubator with a candle jar or a CO2 incubator at 36 DEG C for culturing for 36 hours; 2, picking pure bacteria in a biosafety cabinet by using a disposable inoculating loop, inoculating the pure bacteria to a pre-heated culture medium, and placing the culture medium in a 36-DEG C incubator with a candle jar or a CO2 incubator for culturing for 24 hours; and step 3, taking one sterile glass test tube, adding 1mL of sterilized normal saline, scraping bacterial lawn by using a disposable inoculating loop, grinding along the tube wall, putting on a vortex device, sufficiently and uniformly mixing, and adding into sterilized skim milk. The strain is subjected to freeze-drying preservation through a vacuum freeze-drying technology, so that energy expenditure for preservation of gonococcus is saved, and benefits are brought to distribution of national gonococcus interventricular quality assessment substances and transportation of national gonococcus drug-resistant monitoring point specimens.

The application belongs to the technical field of experimental equipment, and particularly relates to a biological safety cabinet system. The application aims to solve the problem that the instability of pressure in the existing laboratory affects the experiment in the biological safety cabinet. When the biological safety cabinet system is in the first mode, part of the gas in the safety cabinet body is discharged to the room through the exhaust device, and the other part circulates in the safety cabinet body; the air supply device is configured to be closed; when the system is in the third mode, part of the gas in the safety cabinet body is discharged to the outside through the exhaust device, and the other part circulates in the safety cabinet body; when the system is in the second mode, the gas in the safety cabinet body is discharged to the outside through the exhaust device. In the third mode and the second mode, the air supply device is configured to be started to make the air pressure in the room meet the preset pressure. Through the above setting, the air supply device and the exhaust device are linked to meet the indoor pressure requirement, and the air supply device and the exhaust device have no time difference in action, which is beneficial to improving the stability of the indoor pressure in the laboratory.

The utility model relates to the technical field of biological experiment equipment, and discloses a waterproof lifting type biological safety cabinet which comprises a cabinet body, the bottom of the cabinet body is fixedly connected with a cleaning cabinet, the inner side wall of the cleaning cabinet is rotatably connected with a rotating shaft, the surface of the rotating shaft is sleeved with an overturning plate, the top surface of the overturning plate is fixedly connected with two sets of rotating bolts, and the rotating bolts are fixedly connected with the bottom of the cabinet body. The surface of the rotating bolt is rotationally connected with a lifting assembly. According to the waterproof lifting type biological safety cabinet, through the arrangement of the lifting assembly, when an experiment board needs to be lifted, a hydraulic rod is started according to the height needing to be lifted, the hydraulic rod pushes a sliding rod to slide in a sliding groove of a limiting block, then a pushing block is driven to move, and a push rod drives a supporting rod to rotate on the surface of a rotating bolt; and then the push rod and the supporting rod push the experiment plate to lift, so that the effect of lifting the experiment plate is achieved, the appropriate height can be conveniently adjusted according to the heights of different persons, and the comfort and adjustability of the biosafety cabinet in an experiment are improved.

The utility model relates to the technical field of biological safety cabinets, and discloses a biological safety cabinet for sample preserving fluid, which comprises a cabinet body, a ventilation component arranged at the top of the cabinet body, an opening arranged on the front side of the cabinet body, an operation component arranged inside the cabinet body, a limiting component arranged on one side of the bottom of the cabinet body, and a control component arranged on the other side of the cabinet body. A support is fixedly connected to the bottom of the cabinet body, a filter is fixedly installed in the cabinet body, the operation assembly comprises a damping column, the bottom of the damping column is fixedly connected to the interior of the cabinet body, a supporting plate is fixedly connected to the top of the damping column, a working platform is placed on the top of the supporting plate, and a first glass door is installed at an opening of the cabinet body. The bottom of the first glass door is rotationally connected with a second glass door, and the bottom of the second glass door is fixedly connected with a supporting rod. According to the utility model, by operating the assembly device, the fatigue of the arm is reduced, meanwhile, the visual operation at a short distance can be realized, and the detailed reaction of observing a sample can be clearer.

A biosafety cabinet including a plenum and a divider positioned in the plenum. The divider divides the plenum into a supply section and an exhaust section. A blower is positioned adjacent the plenum and in fluid communication with the plenum. The blower is configured to simultaneously supply air to both the supply section and the exhaust section of the plenum. An exhaust filter is positioned between the exhaust section and an exhaust outlet. The air supplied to the exhaust section from the blower passes through the exhaust filter. A supply filter is positioned between the supply section and a work area. The air supplied to the supply section from the blower passes through the supply filter. An adjuster may be coupled to the divider to adjust a position of the divider in the plenum.