Standard Analysis of Full Oil-free Air Compressor

1. Definition and Classification

1. Definition
full oil-free air compressor refers to the compression process does not use lubricating oil, and the compressed gas does not contain oil in the high cleanliness of the equipment. Its core is to achieve oil-free compression through water lubrication, ceramic bearings or magnetic levitation technology, which is suitable for medical, food, electronics and other industries with extremely high air quality requirements.

2. Classification

• structure type:
  • scroll: Suitable for small flow scenarios (≤ 4m & sup3;/min), with noise as low as 68dB.
  • water lubricated screw type: Suitable for large flow requirements, single-stage energy efficiency is 35% higher than traditional models.
  • dry oil-free screw type: The screw is protected by resin materials to avoid high-speed friction damage.
  • Reciprocating: The working principle is similar to that of a centrifugal pump, suitable for low-pressure scenarios.
• Application Scenarios:
  • medical grade: such as breathing equipment, oxygen machine, to meet the oil-free, sterile requirements.
  • Industrial Grade: Such as chip manufacturing, spraying workshop, need ultra-low oil content.
  • General Level: Such as pneumatic tools, light machinery, to meet the basic oil-free needs.

2. Core Technical Standards

1. Oil-free performance

• oil content limit:
  • the oil content of the compressed air shall conform to ISO 8573-1:2010 Class 0 standard, I .e. oil content ≤ 0.001 mg/m & sup3;, which is 10 times stricter than the old standard.
  • Oil testing by third-party testing agencies (such as CNAS accredited laboratories) is required and an oil-free certification report is provided.
• Filtration system:
  • configure multi-stage filters (such as activated carbon filters) to ensure that the oil content is stable at ≤ 0.001 mg/m & sup3;.

2. Energy efficiency requirements

• energy efficiency grade:
  • comply with GB 28373-2012 "air compressor energy efficiency limit value and energy efficiency grade", the energy efficiency grade shall reach the first level standard.
  • specific power(Power consumed per unit volume flow) shall be lower than the value specified in Table 1, for example, when the driving power ≤ 22kW, the specific power ≤ 9.5kW/(m & sup3;/min).
• energy saving design:
  • frequency conversion technology is adopted to dynamically adjust the output according to the gas consumption, and the pressure fluctuation is controlled within ± 0.05MPa.

3. Noise control

• noise limits:
  • the noise of medical-grade equipment should be ≤ 52dB, and that of industrial-grade equipment should be ≤ 70dB, meeting the noise measurement standard of GB/T 4980-1985.
• noise reduction measures:
  • low vibration design with silencer or sound enclosure.

3. Design and Manufacturing Specification

1. Material requirements

• key components: Screw, cylinder and other parts need to use corrosion-resistant, high wear-resistant materials (such as stainless steel or special alloy).
• Seal use food-grade or medical-grade materials (such as silicone) to avoid contamination of compressed air.

2. Structural optimization

• water vapor separation system: Equipped with high-efficiency separator to ensure the dryness of compressed air (pressure dew point ≤ 5 ℃).
• Heat dissipation design: Optimize the cooling system (such as water cooling or air cooling) to ensure that the exhaust temperature is stable at 70-90 ℃.

3. Safety protection

• electrical safety: Comply with GB 4706.1-2005 standard, including insulation resistance> 1MΩ and grounding resistance <0.5 Ω.
• Safety device: Configure overheat protection and pressure relief valve to prevent equipment damage or accidents.

4. Testing and Verification Standards

1. Performance test

• test Method test the displacement, power, noise, vibration and other indicators according to GB/T 3853-2015 Performance Test Method for Volumetric Air Compressors.
• Durability test: Continuous operation for more than 500 hours to evaluate equipment stability.

2. Air quality inspection

• oil detection: Use a laser particle counter to ensure that the oil content is ≤ 0.001 mg/m & sup3;.
• dryness monitoring: The pressure dew point shall be detected by dew point meter and shall be stable at ≤ 5 ℃.

3. Certification requirements

• international Certification: Through CE, ROHS certification.
• Medical Equipment USP<85> biocompatibility testing is required to ensure no cytotoxicity.

5. industry application standards

1. Medical field

• compressed air requirements: oil content ≤ 0.001 mg/m & sup3;, bacterial filter accuracy ≤ 0.01 μm.
• Special configuration: Automatic drain valve, anti-corrosion gas storage tank to ensure sterile output.

2. Food and Pharmaceutical

• regulatory Compliance: Comply with EU EC 1935/2004 regulations, compressed air in contact with food must be oil-free.
• Filtration system: Configuration of activated carbon filter, adsorption of residual odor or organic matter.

3. Electronic industry

• ultra clean standard: Oil content ≤ 0.0001 mg/m & sup3;, to avoid contamination of the chip manufacturing process.
• dust removal filtration: Equipped with high-efficiency dust removal filter, particle size ≤ 0.1 μm.

6. Maintenance and Maintenance Specification

1. Daily inspection

• drain valve: Drain the condensate from the gas storage tank every day and check whether the drain valve works normally.
• Filter: Clean the air intake filter every week and replace the filter element (if necessary).

2. Regular maintenance

• lubrication inspection: Check the bearing lubrication every 500 hours and supplement the high temperature lithium base grease.
• Comprehensive detection full inspection every 2000 hours, including electrical system, cooling system and compression parts.

3. Troubleshooting

• troubleshooting sequence: Follow the troubleshooting sequence of "Electrical & rarr; Control & rarr; Machinery" and use multimeter, pressure gauge and other tools to diagnose the problem.
• After-sales support: For complex faults, contact the manufacturer after sales, and use the original certified parts when replacing parts.

7. Conclusion and Implementation Path

all oil-free air compressor standards need to cover oil-free performance, energy efficiency, noise, safety and other indicators, and through strict testing and certification to ensure compliance with industry requirements. The user can select the appropriate criteria according to the specific application scenario:

• medical field: Priority to meet the requirements of oil-free and sterile, equipped with high-precision filters.
• Industrial field: Balancing energy efficiency and cost, using frequency conversion technology to optimize operation.
• General Scenario: Select the basic oil-free model, regular maintenance to ensure stable performance.

Through the implementation of the above standards, the quality and reliability of all oil-free air compressors can be systematically guaranteed to meet the stringent needs of different industries.