The overall working principle of the oxygen concentrator includes the following steps:
1. Air compression: The oxygen concentrator compresses the air to a higher pressure through an air compressor.
2. Molecular sieve separation: The compressed air enters the molecular sieve bed. The molecular sieve uses its difference in adsorption capacity for different gas molecules to adsorb impurities such as nitrogen and carbon dioxide, while oxygen passes through the molecular sieve.
3. Oxygen enrichment: The concentration of oxygen in the gas separated by the molecular sieve is significantly increased, reaching the standard for medical or industrial use.
4. Pressure release and regeneration: When the molecular sieve bed is saturated, the impurities adsorbed on the molecular sieve are desorbed and discharged by reducing the bed pressure, and the adsorption capacity of the molecular sieve is restored.
5. Cyclic operation: The above process is usually carried out in a cycle in the oxygen concentrator to ensure the continuous output of high-concentration oxygen.
Types of oxygen concentrators include:
1. Molecular sieve oxygen generation: This is the most commonly used technology for home oxygen concentrators. Molecular sieves have the ability to selectively adsorb gas molecules, and separate oxygen from impurities through the pressure swing adsorption (PSA) process.
2. Membrane separation oxygen production: Use special polymer membranes to separate oxygen and nitrogen in the air, and oxygen molecules preferentially pass through the membrane to obtain oxygen-enriched air.
3. Chemical oxygen production: Use chemical reactions to produce oxygen, but it is rarely used in household oxygen generators because the reaction raw materials need to be replaced regularly and the operation is complicated.
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