Air Filtration for HVAC Systems in the Transportation Industry

1. Road Transportation

(1) Passenger Vehicles / Bus HVAC Systems

Core Requirements:

Filter PM2.5, pollen, and exhaust particles (e.g., NOx, carbon soot) to improve cabin air quality.

Key Products & Solutions:

· Primary Filter (G4): Captures large particles ≥5μm (e.g., dust, pollen).

· Medium Efficiency Activated Carbon Composite Filter (F7):

PM2.5 filtration efficiency ≥85%.

Adsorbs odors (e.g., VOCs, exhaust fumes).

Advanced Technology:

· Tesla Model Y HEPA (H13) Filter: Achieves 99.97% efficiency for 0.3μm particles, suitable for biohazard protection.

(2) Heavy-Duty Trucks / Construction Machinery

Core Requirements:

Protect engine intake systems from sand and dust abrasion.

Key Products & Solutions:

· Cyclonic Pre-Filter: Separates large sand particles without replacement.

· High-Efficiency Dry Air Filter (ISO 5011 Standard):

Filters 1μm particles with dust-holding capacity ≥500g.

2. Rail Transportation

(1) High-Speed Rail / Subway Cabin HVAC

Core Requirements:

Control PM2.5, bacteria, and CO₂ levels in enclosed cabins.

Key Products & Solutions:

· Primary (G4) + Medium Efficiency (F7) Filters:

Capture rail dust and metal debris.

· High-Voltage Electrostatic Precipitation Module:

Removes 0.1μm particles (e.g., viral aerosols).

Case Study:

Beijing-Zhangjiakou High-Speed Rail: Utilizes "G4 + Electrostatic + Activated Carbon" triple filtration, achieving ≥95% PM2.5 removal.

(2) Subway Stations / High-Speed Rail Station Ventilation

Core Requirements:

Mitigate airborne contaminants (e.g., droplets, PM10) in high-density areas.

Key Products & Solutions:

· Pocket Medium Efficiency Filter (F8):

90% filtration efficiency (ASHRAE 52.2 Standard).

· UV-C Germicidal Lamps: Inactivate pathogens in return air.

3. Aviation

(1) Aircraft Cabin Air Circulation

Core Requirements:

Prevent viral transmission (e.g., COVID-19).

Key Products & Solutions:

· HEPA Filter (H13):

99.99% efficiency for 0.3μm particles; used in Boeing 787 & Airbus A350.

· Real-Time Air Exchange System:

Full cabin air refresh every 2–3 minutes, combined with HEPA for infection control.

(2) Air Cargo Temperature-Control Systems

Core Requirements:

Protect sensitive cargo (e.g., pharmaceuticals, electronics) from dust.

Key Products & Solutions:

· Low-Temperature Resistant Medium Filter (F7):

Withstands -40°C without material brittleness.

4. Marine Transportation

(1) Cruise Ships / Ferry Cabin Ventilation

Core Requirements:

Resist saltwater corrosion in marine environments.

Key Products & Solutions:

· Salt-Resistant Primary Filter (G3):

Stainless steel frame + polyester fiber coating.

· Electrostatic Desalination Module:

Removes 0.01μm salt particles with ≥98% efficiency.

(2) LNG Carrier Ventilation

Core Requirements:

Prevent methane leakage and explosion risks.

Key Products & Solutions:

· Explosion-Proof Activated Carbon Filter: Adsorbs VOCs.

· Infrared Methane Sensors: Trigger forced exhaust systems upon leakage detection.

5. Specialized Vehicles

(1) Ambulances / Negative-Pressure Isolation Vehicles

Core Requirements:

Block airborne virus transmission.

Key Products & Solutions:

· HEPA (H14) + UV-C System:

99.995% filtration efficiency and negative pressure (-30Pa).

Case Study:

Beijing Emergency Center: Dual-layer HEPA redundancy design.

(2) Refrigerated Logistics Vehicles

Core Requirements:

Inhibit mold growth on perishable goods.

Key Products & Solutions:

· Antimicrobial Medium Filter (F7):

Silver-ion coating to suppress microbial growth.