The working principle and performance characteristics of the ultra-clean workbench

The clean environment of the ultra-clean workbench is formed
in a specific space, and the clean air (filter air) flows in a set direction.
Divided by the direction of air flow, the existing ultra-clean table can be divided into vertical, inward-outward and lateral-facing type
.
Considering the quality of operation and the impact on the environment, the vertical type is superior
.
The clean air supplied by the air supply filter plate descends through the operating area at a specific speed, separated in the middle of the approximate operating area, sucked away by the front air suction hole and the rear suction window, the air sucked in by the front and rear of the lower part of the operating area is mixed together, and pumped into the rear positive pressure area by the blower, in the upper part of the machine, 30% of the gas is discharged from the top through the exhaust filter plate, and about 70% of the gas re-enters the operating area
through the oxygen supply filter plate.
To replenish the air discharged from the exhaust port, the same volume of air is replenished
from the room air through the operating port.
This air does not enter the operating area, but simply forms an air barrier
.
UV lamps should be illuminated for 30-40 minutes before use of the ultra-clean workbench, and various openable doors and windows around the operating area should be checked in the working position
.
Operation takes place in the center of the operating area, which is a relatively safe area by
design.
Before proceeding, you should have a preliminary understanding of the experimental material, and understand the performance and safety
of the equipment you are using.
Strict implementation of laboratory safety procedures
.
The use of specific pathogens in any ultra-clean bench must be evaluated
for safety.
If the experimental material will cause environmental pollution to the surrounding environment, it should be avoided in models without exhaust filter plates, because operating in flowing air is no different from
loose du.
Any advanced equipment does not guarantee the success of the experiment, and the use of ultra-clean benches in animal quarantine laboratories is aimed at sterility and avoiding cross-contamination, so skilled operation and clear sterility essentials
are indispensable.
The advantage of the ultra-clean workbench is that it is easy to operate, relatively comfortable, high work efficiency, short preparation time, more than 30 minutes to start the machine can be operated, basically can be used
at any time.
In factory production, when the inoculation workload is very large and it is necessary to work for a long time, the ultra-clean table is an ideal equipment
.
The ultra-clean table is powered by a three-phase motor, with a power of about 145 to 260W, and the air is blown out through the "filter" composed of a special microporous foam sheet superimposed, forming a continuous dust-free and sterile ultra-clean air laminar flow, that is, the so-called "efficient special air", which removes dust, fungi and bacterial spores greater than 0.
3μm
.
The flow rate of ultra-clean air is 24~30m/min, which is enough to prevent pollution caused by possible disturbance of nearby air, and such a flow rate will not hinder the use of alcohol lamps or Bunsen lamps to burn and disinfect
equipment.
The staff operates under such sterile conditions to keep the sterile material free from contamination
during transfer inoculation.
However, in the unlikely event of a power outage during operation, material exposed to unfiltered air will not be spared contamination
.
At this time, the work should be completed quickly, and a mark should be made on the bottle, if the material in the inner stage is in the proliferative stage, it will no longer be used for proliferation and transferred to rooting culture
.
If it is a general production material, it can also be discarded because it is extremely rich
.
If it is in the rooting process, it can be reserved for later planting
.