What are the types of pass boxes?

There are several main types of pass box:
First, ordinary pass box
Basic structure and principle
A common pass box is usually a box structure with an interlocking device. The interlocking device ensures that the doors on both sides of the transfer window cannot be opened at the same time, which prevents direct air convection between different clean areas. Its main function is to provide a simple physical isolation space for the transfer of items between different cleanliness areas.
For example, in an ordinary electronic component assembly shop, this pass box can be used to transfer small electronic components, tools, etc. When one side door is opened to put in the items, the door is closed, and the other side door can be opened to take out the items, avoiding the air in the two areas in the case of uncontrolled mixing.
Application scenario
It is suitable for industrial places or laboratories where cleanliness is not very high. For example, in some general machining workshops, the transfer window is mainly to prevent the spread of large particle pollutants such as metal debris and dust in the processing process between different areas. In some teaching laboratories, the pass box can be used to transfer laboratory equipment between the preparation area and the experimental operation area to meet basic anti-contamination needs.
Second, the laminar flow pass box
Airflow characteristics and working mode
The core feature of the laminar flow pass box is the laminar flow airflow inside. It is designed with an efficient air filtration system and airflow organization so that clean air flows in a uniform laminar flow state in the transfer window. Laminar airflow can effectively remove particles and microorganisms from the surface of the delivery item, maintaining a high degree of cleanliness inside the pass box.
For example, in the aseptic workshop of a pharmaceutical company, when the pharmaceutical packaging material enters the aseptic filling area from the general cleaning area through the laminar flow transfer window, the laminar flow air will "purge" the surface of the packaging material to remove the microorganisms and dust that may be attached, ensuring that the material entering the aseptic area meets the aseptic requirements.
Application field
It is mainly used in industries with high requirements for cleanliness and sterility, such as biopharmaceuticals, medical device production, high-end electronic chip manufacturing, etc. In cell culture laboratories in the biopharmaceutical industry, laminar flow transfer Windows are used to transfer culture bottles, reagents, and other items to prevent microbial contamination of the cell culture environment and ensure the accuracy of the experiment and the quality of the product.
Three, air shower pass box
Working principle and purification function
Air shower pass box combines the principle of air shower and the function of pass box. When the item is put into the pass box, the internal high-speed clean air will purge the item from multiple angles, blowing off the dust, hair, fibers, and other pollutants on the surface of the item. These blown contaminants are collected by a filtration system to achieve efficient purification of the item.
Just like in some precision optical instrument manufacturing workshops, parts such as lenses are cleaned through an air shower pass box before entering the clean assembly area. The high-speed clean air flow can remove the tiny dust particles that may be present on the surface of the lens, which may affect the image quality of the optical instrument if it enters the assembly area.
Usage scenario
It is often used in industries with high requirements for surface cleanliness, such as optics, precision instrument manufacturing, aerospace parts processing, etc. In the aerospace field, small impurities may have a serious impact on the performance of aircraft parts, and the air shower transfer window can ensure that the surface of the parts reaches a high degree of cleanliness during the transfer of different clean areas.
Fourth, the vacuum transfer window
Special working conditions and principles
A vacuum pass box is a device for transferring items in a vacuum environment. Pumping the inside of the pass box into a vacuum state prevents the oxygen, moisture, and particles in the air from causing oxidation, relaxation, and other damage to some special items (such as materials sensitive to oxygen, medicines susceptible to moisture, etc.). During the transfer process, items are transferred from one area to another in a vacuum environment and then returned to a normal air pressure environment.
For example, in some new materials research and development laboratories, for some highly active metal materials, it is necessary to avoid contact with oxygen in the air during the transfer process, and the vacuum pass box can provide such an oxygen-free transfer environment to ensure that the performance of the material is not affected.
Scope of application
It is mainly suitable for the transmission of special materials or products sensitive to environmental factors such as oxygen and moisture, such as special chemical materials, high-end electronic materials, some biological samples, and other fields. In the semiconductor industry, some chip manufacturing materials that are extremely sensitive to oxidation can be transferred through vacuum transfer Windows, ensuring the stability and performance of the material.