Air Shower
Industries such as food, pharmaceuticals, electronics, medical devices, and biological laboratories have stringent requirements for particulate and microbial cleanliness, and personnel and material entry and exit are among the largest sources of contamination in clean areas. The Air Shower uses high-speed clean airflow to blow off dust attached to surfaces of entering personnel in all directions. It is an indispensable "physical barrier" and purification checkpoint between clean and non-clean areas, safeguarding the first threshold of cleanliness from the source.
I. Product Positioning
The air shower cleanroom (Air Shower) is a purification passage equipment for personnel and materials entering and exiting clean factories and cleanrooms, arranged between clean and non-clean areas. It consists of a cabinet, HEPA filter, centrifugal fan, multi-angle nozzles, and a PLC automatic control system. Through circulating clean airflow at high speed, it removes surface dust from human bodies or goods, and then releases them through interlocked doors into the clean area. It can be configured as single-person, double-person, tunnel-type, or cargo shower as needed, and is standard purification equipment for GMP workshops and clean factories.
II. Working Principle (Brief)
Induction Interlock: When personnel/materials enter, photoelectric induction triggers, and the inner and outer doors are electronically interlocked to prevent air from directly passing through between the two sides.
High-Efficiency Filtration: The centrifugal fan draws air, which is filtered through HEPA (≥99.97% efficiency for particles ≥0.3 μm) into clean airflow.
High-Speed Blowing: Multi-angle nozzles emit high-speed clean airflow at 18–30 m/s, forcefully blowing off dust attached to the surface of human bodies/materials.
Dust Circulation: The blown-off dust is pre-filtered and recirculated (or exhausted) to avoid secondary dust dispersion.
Timed Purification: The PLC automatically runs the blowing for 10–30 s as set, with time adjustable on site.
Unlock and Release: After blowing is completed, the clean-side door automatically unlocks, and personnel/materials enter the clean area.
Process flow: Personnel/Materials → Induction Interlock → HEPA-Filtered Clean Airflow → 18–30 m/s Multi-Angle Blowing → Blow Off Surface Dust → Timed Purification → Unlock and Release into Clean Area
The core lies in "high-speed clean airflow + double-door interlock": the high-speed jet strips attached particles from surfaces and filters them immediately, while the electronic interlock ensures no direct passage between inside and outside before blowing is completed, preventing unpurified air from being carried into the clean area with personnel/materials, thereby blocking the largest contamination source—personnel and materials—at the door.
III. Core Advantages
① Effective Contamination Control Blows off surface dust, significantly reducing the contamination load brought into the clean area by personnel/materials.
② Interlock Anti-Bypass Double-door electronic interlock prevents direct air passage between inside and outside, ensuring pressure differential and cleanliness gradient.
③ Multi-Stage Filtration Pre-filter + HEPA combination ensures stable and reliable cleanliness, upgradable to ULPA.
④ Intelligent Control PLC + infrared sensing + adjustable blowing time, user-friendly interface, unattended operation.
⑤ Energy-Saving and Quiet Variable-frequency fan and circulating air design for low-noise operation and controllable energy consumption.
⑥ Modular Configuration Single-person / double-person / tunnel-type / cargo shower customized as needed, flexibly adapting to production lines.
IV. Main Technical Parameters (Range Reference)
Item | Parameter Range / Description | Remarks |
|---|---|---|
Filtration Efficiency | HEPA ≥ 99.97% @ 0.3 μm | Upgradable to ULPA, typical range reference |
Blowing Air Velocity | 18 – 30 m/s (nozzle outlet) | Affects blowing effect, typical range reference |
Blowing Time | 10 – 30 s (adjustable) | PLC setting, typical range reference |
Fan Power | 0.55 – 2.2 kW | According to single/double-person specifications, typical range reference |
Number of Nozzles | ≥ 12 – 36 | According to specifications and blowing surfaces, typical range reference |
Cabinet Material | Stainless Steel 304 / Powder-Coated Cold-Rolled Steel | Choose stainless steel for corrosive environments, typical range reference |
Matching Cleanliness | Up to ISO Class 5 – 8 | Matches cleanroom class, typical range reference |
Door Type | Double-door electronic interlock (optional audible and visual提示) | Core for anti-bypass, typical range reference |
* The above are typical range reference values. Actual specifications, air velocity, and cleanliness are determined by design calculations and site conditions.
V. Typical Application Scenarios
Scenario / Industry | Adaptation Description / Main Function |
|---|---|
Pharmaceutical / GMP Workshop | Personnel entry purification, meeting GMP particulate and microbial control |
Food / Beverage Clean Workshop | Prevents dust and microbial contamination brought in by personnel |
Electronics / Semiconductor / Flat Panel | Blowing at ultra-clean factory entrance, controlling particles to ensure yield |
Medical Devices / Aseptic Workshop | Purification checkpoint at aseptic area entrance |
Biological Laboratory (P2/P3) | Personnel/material entry and exit purification, ensuring biosafety |
Coating / Precision Manufacturing | Dust and debris removal, ensuring coating and assembly cleanliness |
Hospital Operating Room / Clean Corridor | Purification passage for medical staff and instruments |
VI. Applicable Boundaries and Selection Recommendations
This product is suitable for personnel/material purification at clean area entrances. Select single-person, double-person, or tunnel-type based on personnel flow, and cargo shower for goods; for high-humidity or corrosive environments, choose stainless steel 304 cabinet. The air shower is an entry/exit purification device and cannot replace the air purification of the cleanroom itself; it must be used in conjunction with clean air conditioning and pressure differential systems.
Selection is determined by the number of passers, material dimensions, and cleanliness level; filters must be regularly leak-tested and replaced, and blowing time and air velocity set according to cleanliness requirements; installation must maintain a reasonable pressure differential gradient with the cleanroom and reserve maintenance space. Distinguish from the cleanroom (room itself): the air shower is a "gatekeeper" purification passage device, while the cleanroom is the controlled clean space itself.
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FAQ
How much does this equipment cost?
The price varies by treatment capacity, water quality, materials and configuration, so a custom quote is provided based on your actual conditions. We offer free water testing and solution design, with a detailed quote within 1 working day after requirements are confirmed.
What treatment capacity is available? Can it be customized?
Capacity is fully customizable, ranging from tens to thousands of tons per day (e.g. 0.5–30 m³/h), with non-standard design support matched precisely to your inlet/outlet requirements.
How long does delivery take?
Standard equipment typically takes about 2–4 weeks to produce; custom projects depend on scale and process. The delivery date is confirmed at contract signing, with design, manufacturing and shipping progressing on schedule.
Is installation and commissioning included?
Yes. We provide installation, system commissioning, operator training and environmental acceptance assistance, as well as long-term managed operation services on request.
What about after-sales and warranty?
We provide a warranty period and a 24/7 technical hotline, with free repair for non-human faults during the warranty period, plus spare parts supply and regular inspection services.
Safeguard the First Threshold of Cleanliness
Rihong Environmental can provide specification selection, material customization, and cleanroom supporting solutions for air showers (single-person/double-person/tunnel-type/cargo shower). Welcome to call or leave a message for a customized design.
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