Air purging is a key daily maintenance operation for home nitrogen generators, which is used to remove residual mixed air, moisture, impurities and condensed water inside the equipment pipeline and molecular sieve cavity, effectively preventing nitrogen purity decline, pipeline blockage, and equipment corrosion. Household nitrogen generators will accumulate a small amount of air and moisture in the internal pipeline after each use and long-term standby. If not purged regularly, the mixed air will mix with newly produced nitrogen, resulting in unqualified purity and affecting the use effect of tire inflation and food fresh-keeping. For novice users, air purging is a simple automated and manual combined operation, which is recommended to be carried out before each startup and after every 5 uses.
The first step of purging is pre-operation preparation. Place the generator in a ventilated environment, ensure the gas output hose is connected normally, and open the gas output port to keep it unobstructed (do not connect tires or other equipment). Turn on the equipment power, start the system self-check according to the standard startup procedure, and wait for the equipment to enter standby mode. Confirm that the ambient air is dry and clean, avoid purging in humid and dusty environments to prevent secondary pollution of the internal pipeline. Check that all pressure parameters are normal, and no fault alarm is displayed on the panel, to ensure the purging process is carried out normally.
The second step is formal air purging operation. Most home nitrogen generators are equipped with a one-key automatic purging function; directly press the “Purge” or “Air Release” button on the control panel, and the system will automatically start the purging program. The equipment will increase the internal flow rate instantaneously, discharge all residual mixed air in the air inlet pipeline, compression cavity, adsorption tower and output pipeline through the gas outlet, and the purging duration is automatically controlled by the system for 2–3 minutes. For old models without automatic purging function, manual purging can be adopted: keep the gas output switch open, adjust the flow rate to the maximum gear, let the machine run idle for 3–5 minutes, and use high-speed gas flow to take away residual air and moisture in the pipeline. During purging, observe the gas output state; the initial discharged gas is mixed air with low purity, and when the output gas becomes stable and dry, the purging is completed.
After purging is completed, close the gas output switch, let the machine idle for 1 minute to stabilize the internal pressure, and then carry out formal nitrogen production and gas supply operation. In addition to regular use purging, thorough purging must be carried out before long-term storage of the equipment and after long-term idle (more than 7 days) reuse, to completely remove internal moisture and prevent molecular sieve mildew and pipeline rust. Standard air purging operation can effectively ensure the high purity and stability of nitrogen output, reduce equipment failure rate, and greatly extend the service life of household nitrogen generators.
