Some might think that the biosafety cabinet is an iron box with a centrifugal fan and some HEPA filters; Actually the biosafety cabinet is much more complicated. Similarly, maintaining the safety factor of biosafety cabinets is much more complicated than "removing and replacing filter devices on time". Below people detailed master the clean room biosafety cabinet of the organization and each characteristic.

Air filter: air filter is an important part of the biosafety cabinet, the key part of which has the function of microorganism and dust particles, can clean into the safe working area of the blow and steam blowing out of the body. The filtration device of safety cabinet needs full consideration and efficiency, otherwise it cannot achieve the effect of safe protection against microbial damage. Aluminosilicate fiberglass should be used as the raw material for the filter. At present, in the safety cabinet, 0.3 year old floating objects mostly choose the high-efficiency 99.99% HEPA high-efficiency air supply port and 99.99% ULPA high-efficiency air supply port. The latter has a better caring efficiency, a closer structure and a larger total area of corporate care to provide the same level of cleanliness as ISO3 for the working area.

Head centrifugal blower system software: comply with national safety standard centrifugal blower system software can automatically compensate the exhaust, would reduce the pressure of the filtering device to a certain range, should be fully automatic compensation function of exhaust, stable flow cyclone separator has hot maintenance function of motor, external was 1.15 times the rated current of the centrifugal fan for clean manufacturing, is considered a centrifugal fan outer rotor fan compared with ordinary centrifugal fan, small structure, light weight, balance is good, the heat pipe heat faster, speed control 100%, reliability and long lifetime.

Cyclone control and the definition of "cyclone safety coefficient area" : cyclone control is the key technology of biosafety cabinet. As a standard biosecurity cabinet, cyclone speed must be specified, cyclone must also be specified, reliability and symmetry to consider the adverse effects of microbial experiment.

International biosafety cabinet specifications often require a basic cyclone safety category, such as the UKNSF49 standard, with secondary biosafety containers at least 0.5 m/s; Ec EN12469 requires a minimum value of 0.40 m/s. The cyclone speed of the safety cabinet along the road must be the appropriate standard value, not too high not too low. The higher the cyclone rate is, the more likely it is to cause seepage and loss of maintenance. Too low to give full play to adequate maintenance (air pollutants in the tank are very likely to hit and run out of the work area). The optimal preset rate of different biosafety cabinets is different, and the optimal setting rate can make the safety cabinet give full play to the larger safety protection effect. Manufacturers shall conduct cyclone detection of all types of safety cabinets produced and manufactured, specify the safety coefficient range of cyclones, determine the specified value of cyclones, and submit them to customers for reference.

Control and alarm system: during the full intelligent operation, use the safety cabinet automatic control system to monitor the operation value of the biosafety cabinet, timely deal with all common failures and operating errors, and inform the customer of effective, fully automatic and effective interlock safety precautions. The system software includes a water flow controller with a certain degree of compensation, which can measure the actual water flow of the cyclone separator, including the inlet cyclone separator, the descending cyclone separator, and the discharging cyclone separator (b2). For the low height and width of the front window or unsafe situation, the system software is the light control alarm.

Microbiological safety laboratory third edition states that the entire cleaning process, the time at which contaminated gases are discharged from safe storage, should be eliminated at least five minutes before and after work. Care of biosafety cabinet needs relative steps of floor heating and closure, customers can set time respectively. Torrent is severely configuring the common fault intelligent detection system warning common fault information content. Adhere to the password management work, to avoid non - authority personnel transfer major parameters and operational errors.

The automatic control system that disables the safety of the clock can make the hardware configuration of the electronic parts of the biosafety disk operate without damaging the safety factor in the case of common failures. When invalid, the biosafety disk will be fully restarted automatically, setting all the main parameters within the safe range. When controlling all the functions on the control panel, you can also set the main parameters, upgrade the monitoring software and analyze common faults according to a socket on the RS232 computer. The client's project investment is maintained: the software for the Stementeltm automated control system can be downloaded and upgraded based on the website.

"Centrifugal fan time recorder" can be used to count down the specific application time of the safety cabinet, which is conducive to the working time of the monitor ULPA filter device and the immediate dismantling. "Ultraviolet sterilizing lamp time timer" is used to count down the working time of ultraviolet sterilizing lamp. Unique "maintenance mode" can be used for maintenance, it can bypass the main parameters set by the safety cabinet, control and lock, all the key parameters and output can be observed for common fault analysis.

Security cabinet interlock includes the following aspects:

(1) emissions traffic alerts interlock system software (B2) : if emissions cyclone warning level is less than the minimum, or reduce the cyclone is higher than the highest alert level, full intelligent automatic control system will soon electric alarm and turn off safety cabinet lower cyclone gas path centrifugal fan, outside smoke fan runs again, avoid because of diminished into the cyclone to actual operation staff produce risk.

(2) aspect ratio of front window alarm interlock system software: once the aspect ratio of front window of safety cabinet is shifted, in order to avoid the risk to the actual operation staff, the system software warns the customer with light control (type B2 will also turn off the internal centrifugal fan according to the interlock system software to ensure the stability of the cyclone).

(3) ultraviolet sterilization lamp interlock effect: in order to avoid the worker exposure in the ultraviolet radiation source, the safety cabinet should have the ultraviolet sterilization lamp interlock effect. Can be completely laminated glass front window closed, ultraviolet sterilization lamp can stimulate words; If ultraviolet sterilizes before window in whole process to be appeared by accident slowly rise, ultraviolet sterilizes the lamp to be turned off automatically.

Clean room water science design idea: as a kind of clean air purification system, the safety cabinet solidifies the core idea of clean water science in the design idea. The features of clean water in biosecurity cabinet design include: the mesa and the working area cavity are formed with 304 stainless steel plates, the edges are solved by arcs, the surface layer is free of screws, and the joints are easy to clean. The outlet tank is also selected as a whole forming design concept, and the bottom drainage method slope design concept; The design concept of the convex air inlet and the drainage method hole ensures that there is no cyclone blind area in the working area. Anti-bacterial coating is used on the surface of human body to avoid the growth of harmful bacteria. In addition, the external exhaust pipe adjustment plate installed on the top of the safety cabinet can improve the reliability of the cyclone.

Ergonomics design concept: ergonomics is a new subject, which is a scientific research on the three elements of human, machine and natural environment of human-computer natural environment system software, in order to deal with the efficiency and health problems of system software to provide the basic theory and method of scientific research. The application of human engineering has created personality factors for the design of biosafety cabinet. The design idea and structure of safety cabinet have integrated the adaptability of human body shape, human body posture, vision and sunlight lighting noise, and produced the characteristics of human engineering design. It includes the front window 10 Angle design, the choice of the frame, the personal inclination of the LCD panel, the installation location of the power plug and the liquid valve, the front window design, etc.

Other safety design features: decades of biosafety cabinet application experience has improved the safety cabinet organization. Fei insists on introducing a/b4 and b2 civil biosafety cabinets into the air pressure around the positive pressure, that is, all positive pressure areas in the safety cabinet will be surrounded by the air pressure, in order to avoid the filter leakage reliable.

Overseas safety cabinet manufacturers have just started to adopt a more reliable "three-layer outer wall design concept" : the interior space between the first and second floors on the inside is attributed to air pressure, while the additional third floor on both sides can also have maintenance effects. Even if the outer wall is damaged, there is no risk of waste leakage. Compared with the design concept of laminated glass side window and two-layer outer wall in the same industry, this kind of three-layer outer wall design concept has stronger safety factor.

As the additional safety consideration of front window design idea, a part of safety cabinet manufacturers just started to choose two layers of glass film safety explosion-proof glass. The toughened glass adds another layer of toughness viscous PVB material between two layers of toughened laminated glass. Under the condition that laminated glass is impacted by high compressive strength, this layer of PVB raw material can stick to pulverized laminated glass tightly, avoid laminated glass flying crack, on the one hand, avoid the physical damage that will be caused to the operator; On the other hand, it can still maintain the credibility of the front window cyclone, so as to maintain the safety of operators and the natural environment, and has excellent anti-ultraviolet effect.

Electrical safety inspection and verification: one or more of the following national standards must be considered for the electrical circuits of biosafety cabinets: iec din 61010-1, ec en 61010-1, UK ia61010-1, Australia CSAC52.2 No. 1010.1-92 and China electrical equipment testing standard BG4793.1. All safety cabinets shall be inspected by electronic devices and an inspection report shall be attached. Biosafety ark authority authority attestation standard assures your safe ark can be trusted, apart from want to master the concerned element that says, had better be faster the most convenient discern.