Differences between the working principles of clean pass box and laminar pass box

Working principle of clean pass box
Mechanical interlocking device: The internal interlocking is realized in a mechanical form. When one door is opened, the other door cannot be opened. The other door must be closed before the other door can be opened. For example, the box of the clean transfer window is made of stainless steel plate, and the two doors are interlocked with an electronic interlocking device. The two doors cannot be opened at the same time. The mechanical interlocking ensures the safety of the object transfer process and prevents cross-contamination.
Electronic interlocking device: Interlocking is realized through integrated circuits, electromagnetic locks, control panels, indicator lights, etc. When one door is opened, the door opening indicator light of the other door is not on and the electromagnetic lock is activated to realize interlocking. When the door is closed, the electromagnetic lock of the other door starts to work, and the indicator light will light up, indicating that the other door can be opened. This electronic interlocking device provides more convenience and safety for the use of clean transfer windows.
Working principle of laminar pass box
Using laminar flow technology, the air is sucked in from one side through the fan and flows out from the other side to form a stable airflow to transfer objects. A Laminar flow pass box is a new type of clean pass box. After low-efficiency filtration, the air is pressed into the static pressure box by a low-noise centrifugal fan and then passes through the HEPA filter. After equalization, it passes through the working area at a uniform wind speed to form a clean working environment. The air outlet surface can also be replaced with a nozzle to increase the wind speed to meet the requirements of blowing off the dust on the surface of the object.
Mechanical interlocking or electronic interlocking devices are used inside to ensure that the doors on both sides cannot be opened at the same time. Mechanical interlocking or electronic interlocking devices are set on both sides of the laminar flow transfer window to ensure that the doors on both sides cannot be opened at the same time, which can reduce the communication between the clean area and the non-clean area. For example, an inspection port is set at the bottom of the pass box for the maintenance of the fan, and a locking device is set at the same time to prohibit the simultaneous opening of the inner and outer doors of the transfer window; when passing in items, it must be ensured that the items stay in the pass box for a specified time to ensure effective disinfection. A dedicated person cleans and disinfects the inner and outer surfaces of the pass box every week, checks the air tightness of the windows on both sides and the working condition of the ultraviolet lamp, and solves problems promptly.