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Oxygen Concentrators

Oxygen Concentrators. Topics. Principle of Operation Diagrams Applications Safety Operation Preventive Maintenance Common Failures/Troubleshooting. Principle of Operation. Concentrates oxygen by pulling in air and absorbing nitrogen Sieve beds are made of zeolite (aluminum silicate)

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Oxygen Concentrators

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  1. Oxygen Concentrators

  2. Topics • Principle of Operation • Diagrams • Applications • Safety • Operation • Preventive Maintenance • Common Failures/Troubleshooting

  3. Principle of Operation • Concentrates oxygen by pulling in air and absorbing nitrogen • Sieve beds are made of zeolite (aluminum silicate) • Zeolite has selective affinity for nitrogen at high pressures • Air is compressed and passed through sieve beds • Output is max 95.6% oxygen http://unothisblogiscool.blogspot.com/2010_11_01_archive.html

  4. Principle of Operation • Pneumatic Components • Gross particle filter • Compressor inlet filter (0.1 um) • Compressor (20 PSI) • Heat exchanger • 4-way solenoid-controlled valve • Sieve canisters with zeolite • Pressure equalization valve • Check valve • Pressure regulator • Product canister • Outlet filter (0.3 um) • Flow meter

  5. Principle of Operation • Electrical Components • Power Cord • Circuit Breaker (spring-type, thermal, resettable) • Power Switch • Circuit Board • Cooling Fan • Compressor • Capacitor (stores power for alarm) • Transformer • Solenoid • Pressure Equalization Valve • Alarm

  6. Principle of Operation • Oxygen Sensor • Monitors concentration of oxygen leaving product canister • Sounds alarm when concentration too low • Pressure Sensor • Monitors pressure in the canisters • Sounds alarm when pressure is too high or low

  7. Diagrams Pneumatic Diagram Compressor Sieve Bed Sieve Bed Air Exhaust Four-way Valve • Directs air from compressor into sieve beds • Directs exhaust nitrogen out of sieve beds

  8. Diagrams

  9. Diagrams • Solenoid & Pressure Equalization Valve • Coil and pin assembly • 800-1000 Ohms indicates good coil • 24 V DC signal from circuit board http://www.plastomatic.com/pomsolenoid.html

  10. Applications • Patients with diminished lung function need extra oxygen • Oxygen cylinders are not always available or too expensive for patients

  11. Safety • Near the concentrator DO NOT: • SMOKE • CREATE A SPARK • IGNITE A FLAME • Oxygen is extremely flammable • Always use PPE • Before using, read the owner's manual • Check filters are clean • Do not come in contact with concentrator if wet • Unplug machine when working on it

  12. Operation • Place concentrator at least 3“ away from other items in room • Avoid placing on deep pile carpets or near heaters, radiators or hot air registers • Plug concentrator into electrical outlet. Extension cords are never to be used. • Connect tubing • Turn unit ON and set flow rate. • Alarm will sound for ~5 seconds • To set flow rate, put ball on top of the L/min line of the flow meter • NOTE: Flow must be set after all delivery apparatuses have been connected • The concentrator may be used during initial warm up period (approximately 30 min) while waiting for O2 purity to reach max • Alarm will sound if: • Concentrator is On and Unplugged • The oxygen concentration is below 85% for more than 15 minutes

  13. Preventive Maintenance • On Each Inspection: Record date of service. Record hour meter reading. Clean cabinet filters. Check prescribed L/min. flow rate. • Every 180 Days (4380 Hrs): Check oxygen concentration. • Annually or During PM Schedule: Clean/ replace cabinet filters. Check outlet filter. Check compressor inlet filter. Check O2% and power loss alarm. • As Required: Clean heat exchanger. Replace exhaust muffler. Rebuild top end of compressor.

  14. Common Failures/ Troubleshooting • Low or No Oxygen Output • Filters may be blocked & need replacement • Check Gross Particle Filter • Check Compressor Inlet Filter • Sieve Canisters may need to be replaced • Humidifier Bottle is not screwed on properly • Compressor • Leaks at fitting or tubing • Work cup seals or gaskets • Heat Exchanger tubing leak

  15. Common Failures/ Troubleshooting • Unit won’t turn on/power loss • No power at outlet • Power cord is frayed, broken or damaged • Issue with on/off switch • Faulty Switch • Disconnected wires • Tripped Circuit Breaker • PC Board • Damaged • Loose Connector

  16. Common Failures/ Troubleshooting • Internal Power Loss • Transformer Assembly • Faulty • Connector Loose or Disconnected • Faulty wiring • PC Board • Faulty

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