How does an oil-free scroll air compressor work?

At present, there are various models of vortex air compressors on the market, and the price of small oil-free models is usually around 2000 to 8000 yuan, depending on power and configuration. A vortex air compressor is a volumetric device that utilizes the meshing motion of dynamic and static vortices to achieve gas compression. It is known for its low noise, oil-free, and high efficiency.

How does it work?

The core of a vortex air compressor lies in the coordinated motion of two spiral vortex discs.

1. Structural composition:

It mainly consists of a fixed vortex disk (stationary disk) and a moving vortex disk that rotates eccentrically around it.

2. Compression process:

Air is drawn in from the periphery and enters the crescent shaped cavity formed by the engagement of the vortex disk.

As the rotor continues to rotate, the chamber moves towards the center and gradually shrinks in volume, compressing the gas continuously.

The final high-pressure gas is discharged from the center of the stationary disk, without any suction or exhaust valves, and the airflow is stable without pulsation.

3. Technical features:

No metal contact: The dynamic and static disks rely on precise gaps or oil film seals, resulting in minimal wear.

Continuous compression: suction, compression, and exhaust are carried out simultaneously, with small torque changes and low vibration.

What are the advantages compared to other air compressors

Compared with piston and screw air compressors, vortex compressors perform better in specific scenarios, but there are also limitations.

1. Core advantages:

Ultra quiet: The operating noise is usually between 50-65 decibels, with some models as low as 48 decibels, suitable for sensitive environments such as offices and hospitals.

Oil free and clean: Oil free models can provide Class 0 oil-free air without the need for oil removal devices, meeting the requirements of the food and pharmaceutical industries.

Efficient and energy-saving: With a volumetric efficiency of over 95% and no loss of clearance volume, it saves about 30% energy compared to piston engines of the same specifications.

Easy maintenance: few moving parts (only moving the disc), no vulnerable parts, long maintenance cycle.

2. Main limitations:

Capacity limitation: A single machine has a small displacement and is usually suitable for scenarios below 50HP. Multiple machines need to be connected in parallel for high flow demands.

High manufacturing cost: The high precision requirements for spiral line machining lead to higher initial purchase costs than piston machines.

Pressure range: The exhaust pressure is usually between 0.8-1.0MPa (8-10 bar), which is not suitable for high-pressure applications.

Where is it suitable for use?

Vortex air compressors are mainly used in fields with strict requirements for air source quality and environmental noise due to their characteristics.

1. Medical and pharmaceutical: Hospital gas supply systems and medical oxygen concentrators require absolute oil-free and pollution-free air.

2. Food and electronics: Food processing and packaging, as well as electronic component production, require clean compressed air to come into direct contact with the products.

3. Business and Laboratory: Offices, laboratories, dental clinics, can be directly placed in the work area due to low noise, without the need for a dedicated computer room.

New energy and heat pumps: New energy vehicle air conditioning systems, air source heat pumps, utilizing their high efficiency and miniaturization characteristics.

JOY MACHINERY always adheres to the corporate vision of "building a leading brand of oil-free air compressors in the world", and hopes to provide high-quality, clean and safe air for food, beverage and other production enterprises on the road of oil-free air compressor research and development, production and sales. Source protection, and also contribute a little bit to people's health and safety.

JOY MACHINERY oil-free air compressor series is widely used in the food and beverage processing industry due to its clean air source and continuous and stable gas transmission. If you have any needs, please contact us! JOY Machinery (Shanghai) Co., Ltd. has a professional design team with rich experience and welcomes customization. Diversified products can meet most applications and meet your one-stop shopping needs. The air compressor series includes power frequency screw air compressors, variable frequency screw air compressors, permanent magnet variable frequency screw air compressors, two-stage compression screw air compressors, integrated screw air compressors, laser cutting air compressors, medium and high pressure air compressors. Air compressors, oil-free water-lubricated screw air compressors (special oil-free screw air compressors for the medical industry), diesel-moving screw air compressors, electric-moving screw air compressors and other products.

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