Passbox combined with air shower function for cleanroom pass through

Pass Box with Air Shower Function

Key Features & Functions

1. **Basic Overview**
   - **Definition**: The air shower pass-through is an auxiliary device installed in cleanrooms, primarily used for transferring small items between clean zones and non-clean zones or between areas of different cleanliness levels.
   - **Function**: It uses high-efficiency filtered clean airflow to blow over the surfaces of items, removing dust particles and reducing the risk of contamination when transferring items into the clean area.

2. **Working Principle**
   - **Air Filtration**: High-efficiency filters are used to purify the air, ensuring that the air delivered to the items is clean.
   - **Air Shower Process**: The filtered air is ejected from rotating nozzles in various directions onto the goods, rapidly removing dust particles.
   - **Recycling**: The removed dust particles are captured again by the filter and reused, improving energy efficiency.

3. **Main Features**
   - **Structural Material**: The outer walls are usually made of high-quality cold-rolled steel with plastic spray treatment, while the internal working surface is made of stainless steel, which is wear-resistant and easy to clean.
   - **Interlocking Device**: The doors on both sides have mechanical or electronic interlocking devices to ensure that the doors on both sides cannot be opened simultaneously, preventing cross-contamination.
   - **High Air Speed Design**: The air outlet speed of the nozzle can reach more than 20m/s, effectively removing dust particles from the surface of items.

4. **Application Fields**
   - **Semiconductor Industry**: Used for transferring sensitive components such as chips, avoiding contamination from dust and microorganisms.
   - **Pharmaceutical Industry**: Ensures that drugs are not contaminated by external factors during production and packaging.
   - **Food Industry**: Ensures hygiene and safety during food processing, avoiding foreign matter contamination.

In conclusion, as an important component of cleanrooms, the design and use of air shower pass-throughs aim to minimize contamination and maintain the cleanliness of the production environment. Proper selection and use of air shower pass-throughs are crucial for maintaining the cleanliness of cleanrooms.

1.

Q: How does the integrated air shower function work, and what kind of filter do you use?

A: Our pass-through chamber is equipped with a built-in air shower system. When both doors are interlocked, high-speed purified air, typically more than 25m/s, is blown through stainless steel nozzles to remove surface particles from materials or samples passing through. The standard filter grade is HEPA filter with 99.99% @ 0.5um. This ensures that no cross contamination occurs during material transfer between cleanrooms of different grades.

2.

Q: What safety and interlocking systems do you have to prevent both doors from opening at the same time?

A: We use an electromagnetic interlocking system. When one door is open, the other door remains electronically locked until the first door is fully closed. This complies with GMP standards. As an option, we can also provide mechanical interlocking or an electronic control module with a timer that automatically locks both doors during the air shower cycle. An emergency unlock button is included for safety.

3.

Q: Can the air shower duration and nozzle direction be customized, and is the unit compatible with cleanroom monitoring systems?

A: Yes, the air shower time is adjustable via a digital timer, typically from 1 to 99 seconds. Nozzle direction can be customized (fixed-angle or oscillating) based on your product size and contamination risk. For integration, we offer an optional RS485 Modbus communication module, allowing remote monitoring of door status, air shower cycles, and filter clogging alarms through your BMS or cleanroom control system.