Cleanroom laminar flow workstation's functions:
1. Core Functions
A clean bench (Laminar Flow Workstation) is a critical localized purification device in cleanrooms, providing ISO Class 5 (Class 100) clean and sterile environments through HEPA/ULPA filtration systems. Its primary functions include:
- Contamination Isolation: Creates a unidirectional airflow barrier (vertical/horizontal) to block external dust and microorganisms from entering the work area.
- Product Protection: Ensures precision electronic components, biological samples, and pharmaceuticals remain contamination-free, significantly improving product yield (e.g., semiconductor chip pass rates can increase from 10% to over 90%).
- Operator Safety: In biomedical applications, prevents exposure to hazardous pathogens or chemicals.
2. Technical Principles
- Air Filtration:
Fan draws in air → Pre-filter (primary) → HEPA/ULPA filter (≥99.97% efficiency @0.3μm) → Clean air discharged vertically/horizontally.
- Airflow Control:
- Vertical Flow: Top-down airflow, bottom return (ideal for sterile pharmaceutical operations, higher noise).
- Horizontal Flow: Front-to-back airflow (quieter but more susceptible to operator interference).
3. Key Applications
| Industry |
Applications |
Airflow Type |
| Electronics |
Chip packaging, precision instrument assembly (prevents micro-dust-induced short circuits) |
Horizontal |
| Biopharma |
Cell culture, vaccine filling (sterile environment required) |
Vertical |
| Food Testing |
Microbial testing, aseptic packaging (HACCP compliant) |
Vertical |
| R&D Labs |
Gene sequencing, optical experiments (prevents sample contamination) |
Horizontal |
4. Additional Features & Maintenance
- Smart Controls: Some models include UV sterilization, pressure gauges, and touch panels for real-time filter monitoring.
- Maintenance Requirements:
- Regular filter replacement (pre-filters every 3-6 months, HEPA/ULPA every 1-2 years).
- Wipe surfaces with 70% ethanol to prevent chemical corrosion.
