282 results about "Biosafety cabinet" patented technology

Method and apparatus for testing the operation of an alarm for a ventilated enclosure, such as a fume hood or bio-safety cabinet. Flow of gas being exhausted from the enclosure may be adjusted to a known value below or above a threshold value at which the alarm provides an indication that flow is unacceptably low or high. Adjustment of flow to the known value may be performed without requiring a manual measurement of flow, e.g., by performing a traverse in a duct leading from the enclosure.

A movable laboratory with high biological safety is composed of primary experiment cabin, person cleaning and technological supporting cabin including clothes exchanging room, buffering room and substance transfer window between them, air-tight flexible connection channel between said both cabins, and the connected water and air pipelines, cables and signal lines.

A biosafety cabinet has an air bypass system. The air bypass system reduces air noise and static pressure in the biosafety cabinet, and continues a supply of air to the blower, when the view screen or door is fully closed by providing an alternate path for the air entering the cabinet. The air bypass system further includes an armrest provided on the door sill. The armrest may have perforations on the front and rear surfaces of the armrest to allow the air to travel under the armrest, through an air inlet. The air bypass system additionally blocks germicidal light generated inside the biosafety cabinet from escaping when the view screen or door is fully closed.

An improved system and method for monitoring contamination loading of a filter in a biological safety cabinet comprising a housing defining a work chamber and a filtration chamber, a system for circulating air between the work chamber and the filtration chamber via a fan which draws air under negative pressure from the work chamber and delivers the air under positive pressure through the filter and into the filtration chamber. The filter monitoring system determines a pressure differential between the negative and positive air pressure at opposite sides of the fan, and evaluates the degree of contamination loading of the filter on the basis of the pressure differential. An air flow baffle is disposed within the filtration chamber adjacent the fan for dividing the pressurized air delivered by the fan and partially redirecting a portion thereof for more uniformly delivering the air to the filter.

A biosafety cabinet includes at least one cable port disposed in a wall of the cabinet that allows small tubing and / or cables to enter the cabinet through the walls. The cable port eliminates problems associated with running the tubing and / or cables through an open door at the front of the cabinet. The cable ports enable the user to fully close the view screen door, while maintaining the ability to connect various tubes and / or cables to devices in the interior work area of the cabinet. The biosafety cabinet further includes a double wall configuration with negative pressure air space between the two walls. Air and byproducts or contaminants attempting to escape from the cabinet into the room or enter the cabinet from the outside environment is captured in the negative pressure area between the walls and transported directly to an air filter.

A biosafety cabinet includes one or more air filters below the work surface and a system for holding, sealing, replacing and disposing the air filters through the work access opening of the biosafety cabinet. The air filters under the work surface of the biosafety cabinet capture particulates entering the cabinet from the exterior environment and the particulates within the cabinet's work chamber. Instead of a mechanical clamp, the perimeter of the air filters are sealed using a gasket and a tape, eliminating the accumulation of the contaminants around mechanical clamps. The air filters may be accessed through the work access opening of the biosafety cabinet, packaged for disposal and removed from the biosafety cabinet without being exposed to the exterior environment. A filter cover with an adhesive surface is used to cover and lift the used, contaminated air filter within the biosafety cabinet.

The workability of operation to be performed, while preventing chemical or biological contamination, using a biosafety cabinet and gloves attached to the cabinet is improved. A biosafety cabinet includes a workspace formed in a main body cabinet thereof. Air in the workspace is discharged to outside via filters. A vertically movable front shutter is disposed on a front of the workspace. A front opening is formed below the front shutter to be at a front of the workspace. The front shutter includes plural laterally movable small windows which are overlapped like layered sliding doors. One of the plural small windows is provided, on the workspace side thereof, with a pair of glove ports to which a pair of gloves for use in operation in the workspace can be air-tightly attached.

The invention relates to an outer rotor fan-typed whole wind discharge biological safe cabinet. The invention comprises an upper cabinet part, a purifying working area, an operating table area, a bracket area and an appliance controlling part; the upper cabinet part is arranged on the bracket; the upper and front part of the upper cabinet is the purifying working area and the lower part is the operating table area; the appliance controlling part is positioned in the upper cabinet part and the purifying working area part; the upper and back part of the upper cabinet is provided with a subpressure bag; the wind sending high efficiency filter and the wind discharging filter all adopt the double surface tightening sealing; the middle naked part is positioned in a subpressure area and a zero pressure area to ensure that the purifying working area has no leaking pollution and that the polluted air does not be discharged out of the machine. The invention adopts the filter tightening buckle device, the front and back sealing covers and the high efficient filter support structure, therefore the invention not only has the airproofness of the whole machine and the stably operation, but also brings convenience and safety to the exchange of the high efficient wind discharge filter.

The invention discloses a device for blending medical vein medicines. The device comprises a baseplate, a clamp, a bottleneck scribing mechanism, a bottle opener, a liquid absorption and injection device, a medicinal oscillator and an administration device. The device aims to overcome the defect of low efficiency of blending medicines mutually in the prior art. According to the device, the baseplate is fixed to a platform in a biological safety cabinet; ampoules and a seal bottle clamp group are arranged on the baseplate; bottlenecks of ampoules of different specifications are scribed by a horizontal expansion piece and a vertical expansion piece; the liquid absorption and injection device and an air cylinder piston rod are fixed with a fixed plate of an injector piston rod by a screw cap; and an injector group is inserted into the fixed plate of the injector piston rod and a groove on a fixed plate of an injection vat. According to the device, manual operation is replaced by a linkage structure to realize the medicine blending processes of the absorption and injection of liquid medicine, dissolution by vibration and administration. The invention has the advantages that the device is convenient to use and economic and is operated by power in the process, and blending efficiency of the medicines is improved greatly. The device is suitable to be applied to vein medicine blending centers of hospitals.

The invention relates to a nucleic acid removing agent, which belongs to the field of molecular biology. The nucleic acid removing agent contains the following components in percentage by volume: 5%-10% of an oxidant, 0.1%-3% of a chlorine-containing reagent, 0.1%-3% of an acid-containing reagent, 0.1%-2% of a stabilizer, 1%-8% of a surfactant and the balance deionized water. The nucleic acid removing agent is odorless, is mild in properties, possesses no irritation effect, is simple and convenient to operate, is convenient to store and long in storage period, can be directly sprayed on the ground, wall surfaces and tabletops of laboratories, the tabletops of biosafety cabinets, the surfaces of pipettors, the outer surfacess of various instruments, the outer walls of centrifugal tubes andthe like during use, and can also be directly used for wiping the instruments, the tabletop, the tabletop and the like. By using the nucleic acid removing agent, nucleic acid fragments can be effectively degraded within several minutes, and laboratory aerosol pollution is prevented.

The invention relates to an outer rotor fan style bio-safety cabinet, which cabinet body part is arranged on a bracket part. An upper part of the cabinet body part is cleaning work area, and an lower part is an operating part. A control part is arranged on front of the cabinet body part via relative electric appliances and circuit, an air supply filter of the cleaning work area is arranged on a I-shaped bracket, and an air supply plenum box is arranged on the air supply filter compressed sealed by an upper and lower faces . The I-shaped bracket and the air supply plenum box are pressed on the air supply filter, the central part is positioned on a zone of negative pressure. The air supply plenum box is provided with a baffle, an anechoic guide vane, and an outer rotor fan, and an air exhausting filter and an air exhausting plenum box pressing tightly on the air exhausting filter are arranged above the air supply plenum box. The invention can effectively increase cleanliness and laminar flow uniformity and regulate ratio size of air volume flowing through a front and a bock return air inlets, and the invention has advantages of stable operation, reliable seal and low noise.

This patent application is for an apparatus to safely expose guinea pigs and other small animals to biohazardous aerosol. It is composed of three main chambers housed in an outer box which fits within a conventionally sized biosafety cabinet. The animal chamber contains a removable housing unit for four or eight guinea pigs. The aerosol chamber is separate to minimize fur contamination. The nebulizer chamber is also sealed to reduce risks from leakages. This apparatus is easily decontaminated by immersion in disinfectant. The first version of the prototype, tentatively named the AXS1, has been tested for safety, ergonomics, efficiency of rodent exposure to bacteria, airflow, access points, seal mechanisms, and size.

The invention relates to a biosafety cabinet capable of prompting life of an ultraviolet lamp. A control panel of the biosafety cabinet is provided with a life preset device, a time processing device and an alarming device. The life preset device is used for presetting a service life of the ultraviolet lamp; and the time processing device is used for recording cumulative operation time of the ultraviolet lamp and calculating the residual service life of the ultraviolet lamp according to a formula: the service life of the ultraviolet lamp=(the preset life-the cumulative operation time) / the preset life*100%. When the residual service life of the ultraviolet lamp is less than 10%, the alarming device sends out an alarming signal to prompt a user to replace the ultraviolet lamp. The provided biosafety cabinet capable of prompting the residual service life of the ultraviolet lamp is simple in device and low in cost, and can greatly save work load of the user to check the ultraviolet lamp.

A biological safety cabinet (BSC) has an air curtain to isolate air inside and outside the BSC. A most preferable slight concave curtain of air can be obtained. With the curtain, neither contamination in the BSC leaks out nor outside contamination enters the BSC. Furthermore, no circulation is formed in the BSC by blowing the air curtain. Thus, the operator using the BSC and the product in the BSC are both well protected.

An improved filter mounting mechanism for laboratory work cabinets, especially biological safety cabinets, enables simple and quick removal and replacement of a filter supported in the cabinet housing between a work chamber and a filtration chamber. The filter mounting mechanism comprises a stationary filter support surface between the work chamber and the filtration chamber, and a filter clamping surface movable toward and away from the filter support surface between a clamping position relatively proximal to the filter support surface for holding the filter in an operational disposition against the filter support surface and an installation position relatively distal to the filter support surface for permitting insertion and removal of the filter between the filter support and clamping surfaces. An extensible and retractable linkage mechanism, e.g., a scissors mechanism, is connected to the filter clamping surface for selectively actuating movement of the clamping surface between the clamping and installation positions.

A biological safety cabinet is provided that includes a frame. The frame defines a protected work area and encloses the work area on all but one side. A sash is coupled to the frame that at least partially encloses the side that is not enclosed by the frame. A blower is coupled to the frame generally above the work area. The blower is adapted to circulate air through the work area to make the work area a negative pressure area so that harmful materials are confined. A sash grill is coupled to the frame generally below the sash that has a curved top surface. The curved sash grill provides a superior and less turbulent air-flow into the work area, thereby better containing any harmful materials. The curved sash grill is perforated, and the curvature and perforations of the sash grill compensate for partial blockage by such things as the user's arms and other objects. The curvature of the sash grill also avoids a sharp angle at the same height as the work surface which reduces the chance of contact and possible breakage of labware as it is moved into the cabinet.

A biological safety cabinet with several air flow directional control enhancements. A perforated air intake grille within the work chamber inwardly adjacent the user access opening has a forwardly facing make-up air intake surface and a rearwardly facing internal air intake surface angled in converging relation to promote a physical division between intake of ambient air and internal air into the cabinet's air recirculation system. An aerodynamic user arm rest is affixed to a support stand to extend alongside the access opening at a spacing outwardly from the housing to assist in directing make-up air to the ambient air intake opening without cross-contamination between the arm rest and the work chamber. An air transmission grille above the work chamber has a horizontal main extent terminating at a spacing from the sash and an upwardly angled extent adjacent the sash to direct increased laminar air flow downwardly along the sash.

The invention discloses a chlorine dioxide gas disinfection device, which has the characteristics of quick and thorough disinfection, no corrosion or residue, compact structure, convenience of operation, visible and controllable disinfection process, simple maintenance and the like. The chlorine dioxide gas disinfection device comprises a chlorine dioxide gas generating device, an online concentration detection device, a man-machine interactive platform, and an auxiliary pipeline, wherein the man-machine interactive platform is respectively connected with the chlorine dioxide gas generating device, the online concentration detection device and the auxiliary pipeline; and a detection pipeline provided with a temperature sensor, the online concentration detection device and a circulating fan in turn is communicated with a disinfection space and a chlorine dioxide delivery pipeline respectively. The chlorine dioxide gas disinfection device can be used for high-level disinfection on occasions such as biosafety laboratories, experimental animal rooms, biosafety cabinets, contagious wards, operating rooms, high-efficiency air filter units and the like.

The invention relates to a biosafety cabinet provided with easily-assembled and disassembled filters, belonging to the field of bioexperiment technology. The biosafety cabinet comprises an upper fan cover (2), a lower fan cover (4), the air exhaust filter (1) and the descending filter (5), wherein the upper fan cover (2) is fixedly connected with the lower fan cover (4); the air exhaust filter (1) is pressed at an air exhaust hole in the upper fan cover (2) by n air exhaust filter fixing rods; the descending filter (5) is pressed in the lower fan cover (4) by m descending filter fixing rods; and m and n are integers which are more than or equal to 2. According to the biosafety cabinet provided by the invention, the filters are very convenient to assemble and disassemble, so that maintenance personnel can work safely and reliably.

This invention relates to a kind of automatic zeropoint calibration way of wind speed sensor of biosafety tank. Each wind speed sensor will first takes standardization to normal state before using. Zero initial value and high spot initial value of standardization will be saved as reference zero baseline value and reference high spot baseline value, and used for figuring out reference curve. While every time using of latter day, first unclose blower fan, but blower fan not start-up. first sensor warm-up, keeping wind speed around sensor as 0, stabilizing for 15 seconds to 5 minutes, picking currently wind speed sensor zero value, and comparing currently wind speed sensor sampling value with reference zero baseline value, if occurring drift, then figure out correction curve corrected value. According to corrected value of correction curve to amend sampling value of currently wind speed sensor, figure out correction curve, amend drift of sensor. The merit is preventing unnecessary hazard caused by sensor drift.

The invention relates to a movable biological examination laboratory. The movable biological examination laboratory comprises a carriage fixedly arranged at a vehicle frame located at a rear part of a cab. A side wall of the carriage is provided with a side door. In the carriage, a buffer room and an air-conditioning equipment room are arranged at positions corresponding to the side door. An air-conditioning external unit room is arranged in the carriage at a front end of the air-conditioning equipment room. A laboratory room is arranged in the carriage at a rear end of the buffer room. An exhaust cleaning equipment room is arranged at a carriage rear part located at a corner of the laboratory room. A transfer window is arranged between the buffer room and the laboratory room. A biosafety cabinet, a sterilizer, an incubator, a refrigerator, a hand washing machine and a vehicle-mounted hand-washing system are arranged in the laboratory room. The movable biological examination laboratory can provide on-site biosafety detection for a large-scale assembly, can be used for on-site detection in great and sudden biotic factor-related public health events and accidents, and also can be used for pathogen detection of natural focal diseases at ordinary times.

The invention relates to a design scheme of a mobile microbiological detection vehicle. According to the design scheme of the mobile microbiological detection vehicle, an air purifying barrier space capable of developing microbiological detection testing works is designed in a box type automobile; and a super clean bench / biological safety cabinet, a microbiological incubator, an electric heating box, a freezer, a refrigerator, an ozone generator, an R / O membrane small-sized sterile water producer, an article storage cabinet / drawer with an air self-cleaning function, a transmission window and aterminal display of an information management system are designed in the air purifying barrier space. The mobile microbiological detection vehicle is suitable for field food safety and hygiene detection, microbiological detection of a traditional Chinese medicinal material collection and processing plot, harmful microorganism detection of farms and planting fields, field medical microorganism detection, crime scene investigation of criminal detection cases, microbiological detection in the military field and microbiological detection sample collection and transportation in these fields.

The invention relates to a high efficient particle filter biological detecting method and a safety cabinet detecting system. The front end of the high efficient particle filter at an exhaust outlet of the biological safety cabinet is provided with a microorganism aerosol generator and an air microorganism biological sampler; meanwhile, the rear end of the high efficient particle filter is provided with one to four air microorganism biological samplers, a microorganism culture dish is arranged inside each sampler; when the air is delivered to a front window operating opening of the cabinet body, the analog indicating microorganism is produced artificially, the analog indicating microorganism is the bacterium and virus which do not exist in the natural air and are not harmful to human, animals and the environment; the analog indicating microorganism is collected by the culture dishes arranged inside the front air microorganism biological sampler and the rear air microorganism biological sampler of the high efficient particle filter; the counting is realized after the culture; the filter efficiency of the efficient particle on the microorganism is obtained by counting the ratio of the pre-counting result to the post-counting result of the high efficient particle filter.

The invention discloses a balance hanging system of biologically safe cabinet glass door, which comprises the following parts: movable pulley group, fast-pulley group, spring group and dragline, wherein the dragline is extended by movable pulley group and fast-pulley group anchored by spring when elevating or drawing down the glass; the left and right balancer realize random elevation and location of the glass according to the balance elementary. The invention increases the resistance of glass door switching, which avoids extra damage of error operation for operators completely.

A biological safety cabinet includes a work chamber having a contaminated air discharge opening, a fan enclosure above the work chamber, a conduit extending from the chamber air outlet to the top of the fan enclosure, a first HEPA filter in the top of the fan enclosure, a second HEPA filter between the fan enclosure and the work chamber, and a fan within the fan enclosure to convey air through the conduit from and the first HEPA filter into the fan enclosure, and to discharge air under positive pressure from the fan enclosure through the exhaust port and through the second HEPA filter into the work chamber. Due to the construction of the cabinet, the fan can be repaired or replaced without the need to observe biohazard procedures.

The invention relates to a biological safety device, in particular to a three-grade biological safety cabinet. The three-grade biological safety cabinet comprises a cabinet body, wherein a first filter chamber, a work chamber, a second filter chamber and an air exhaust passage are arranged in the cabinet body, the first filter chamber and the second filter chamber are respectively arranged above and under the work chamber, the air exhaust passage is arranged at the back side of the first filter chamber, the work chamber and the second filter chamber, the air exhaust passage is mutually sealed with the first filter chamber and the work chamber, the top of the first filter chamber is provided with a primary effect filter, an air blasting high-efficiency filter is arranged between the first filter chamber and the work chamber, a first wind exhaust fan and a first wind exhaust high-efficiency filter are arranged between the second filter chamber and the air exhaust passage, a second wind exhaust fan and a second wind exhaust high-efficiency filter are arranged in the air exhaust passage, the second wind exhaust fan and the second wind exhaust high-efficiency filter are arranged near an outlet of the air exhaust passage, and a glove window and a transfer window are respectively connected on the front side and the lateral side of the work chamber in a sealed way. The invention has the advantages of high filter efficiency and stable work performance.

A method for decontaminating a biological safety cabinet with a falling film evaporator, the method comprising the steps of:providing a falling-film evaporator within a cavity of a biological safety cabinet, the evaporator having a housing defining a cavity and an evaporation element disposed in the cavity;conveying a liquid decontaminant from a source of liquid decontaminant to the evaporation element such that the liquid decontaminant flows along a surface of the evaporation element;conveying a carrier gas through the cavity of the housing wherein the carrier gas is conveyed along the surface of the evaporation element to evaporate the liquid decontaminant thereby forming a mixture of the carrier gas and the vaporized decontaminant; andexhausting the mixture into the cavity of the biological safety cabinet to decontaminate articles and surfaces in the cavity.