NF Group Electric Bus Oil-free Scroll Electric Air Compressor water-cooled

Short Description:

Oil-free scroll compressors rely on the meshing of a **moving vane and a stationary vane** to compress air, generating significant heat during compression. Air-cooled models dissipate heat via fans; however, under high temperatures, thermal expansion of the vanes can lead to contact between components, reduced efficiency, and limited pressure output.

**Liquid cooling (water cooling)**: Closed cooling channels are machined inside the stationary vane, housing, and motor casing. A glycol-water solution circulates through these channels, directly removing heat from the vane body. The compression chamber remains isolated from the coolant, ensuring **0-grade oil-free, clean air**.

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Product Detail

Product Tags

Product Description

The EV oil-free scroll air compressor is a core air supply component developed specifically for new energy commercial vehicles (electric buses, electric heavy trucks, electric light trucks, and fuel cell vehicles). It provides 100% oil-free clean compressed air for vehicle pneumatic braking systems, air suspensions, pneumatic doors, and other pneumatic equipment, replacing the direct-drive air compressor in gasoline-powered vehicles. Utilizing the scroll compression principle, with an integrated design of the motor and driver, the entire unit is compact, low-noise, low-vibration, and requires no oil maintenance.

Product Parameter

COMPRESSOR STYLE	Oil-free scroll compressor
The compression medium	air
Normal speed	1800-3200rpm
Supply voltage	380VAC Three-phase
Compressor cooling method	Forced water cooling
Weigh	44Kg (Includes motor and controller)
Shell	Electroplating on aluminum parts
Install method	bolt connection
Install size	Drawing 4-M10 mounting position and motor metal waterproof connector
Outline dimension	334300354
Suction pipe inner size	outer diameter Φ25
Exhaust pipe inner size	Φ25M22*1.5 Compression fitting
Hydraulic pressure of coolant	<1bar(gauge pressure)
External coolant flow rate	≥10L/min
Coolant inlet temperature	≤65℃

Compressor Performance Curve

Product Features

优化后文本：
1. Delivers 100% oil-free compressed air, eliminating the risk of contamination to brake lines, solenoid valves, and other critical pneumatic components.
2. Features ultra-low acoustic noise and mechanical vibration levels—fully compliant with stringent NVH (Noise, Vibration, and Harshness) requirements for electric vehicles.
3. Integrates the permanent-magnet motor and intelligent inverter controller into a single compact unit, optimizing space utilization and simplifying vehicle integration.
4. Requires no lubricating oil throughout its service life, substantially reducing lifecycle maintenance efforts and total cost of ownership (TCO) across fleet operations.
5. Provides exceptionally smooth exhaust flow with negligible airflow pulsation and highly stable discharge pressure—ensuring reliable actuation performance.
6. Operates reliably across an extended ambient temperature range (–40 °C to +85 °C), maintaining consistent performance under diverse real-world driving conditions, including extreme cold, high-heat, and high-humidity environments.