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As the summer of 2025 approaches and temperatures gradually rise, the textile industrial air conditioning will face a severe test in a high-temperature and high-humidity environment. The environment in the textile workshop is special, with a large amount of fiber dust in the air. Coupled with the fact that pathogenic microorganisms such as Legionella can easily multiply under hot and humid conditions, the maintenance of the air conditioning system is not only related to the efficiency of the equipment, but also directly affects the production cost, product quality and employee health. This article will systematically introduce the key points of air conditioning maintenance in the textile industry, ranging from filter maintenance to refrigeration system inspection, from special component maintenance to safety protection measures, helping enterprises establish a scientific air conditioning maintenance system to ensure the stability and safety of the production environment in summer.
I. Cleaning and Disinfection of Air Conditioning Systems: Prevention is better than Cure
In early summer, the temperature rises and the air humidity increases, creating ideal conditions for the reproduction of various microorganisms. The cases of Legionella pneumonia reported successively in Chengdu and Changsha in May 2025 have sounded the alarm for us. All these patients were infected due to the use of unclean air conditioners. One of the diabetic patients even developed severe symptoms such as persistent fever and apathy. Xu Xiaomei, director of the Department of Infectious Diseases at the Fifth People's Hospital of Chengdu, pointed out: "Legionella bacteria particularly prefer to grow in water and humid environments. The hot and humid summer is an excellent opportunity for their reproduction." This reminds us that the cleaning of air conditioners in the textile industry must be comprehensive and thorough, with particular attention paid to the following key links:
Hierarchical maintenance of the filtration system is the first line of defense in air conditioner maintenance. The air in the textile workshop contains a large amount of fibers and dust. The clogging of the filter will significantly reduce the air circulation efficiency and increase energy consumption. According to the technical specifications of Jiangsu Rongquan Technology, textile air conditioning filters should be subject to hierarchical management: the primary filter should be inspected once every 1-2 months, and it needs to be replaced when the resistance reaches 50-100Pa. The medium-efficiency filter should be inspected every 3 to 6 months and replaced when the resistance reaches 150 to 250Pa. High-efficiency filters should be inspected every 6 to 12 months and replaced when the resistance reaches 250 to 400Pa. When cleaning the filter screen, be sure to operate with the power off. Rinse the back (concave surface) with clean water and gently scrub it. After cleaning, place it in a cool place to dry to avoid bacterial growth in a humid environment.
The deep cleaning of the condenser and evaporator directly affects the heat exchange efficiency. The dust and dirt accumulated by these components during long-term operation can increase the energy consumption of the air conditioner by more than 20%. It is recommended to clean the fins with a high-pressure water gun or a dedicated cleaning agent every quarter. Dr. Liu Da from Changsha Central Hospital particularly reminds: "When cleaning the evaporator, a household air conditioner cleaning agent should be used for spraying, but be careful not to spray outside the evaporator to avoid short circuits after the machine is turned on." After spraying, reinstall the dried filter screen and panel, and let it stand for 10 minutes. Then turn on the air conditioner and adjust the air volume and cooling capacity to the maximum, maintaining for 30 minutes to ensure thorough drying.
Unblocking the drainage system is the key to preventing the growth of microorganisms. Check the drainage pipes to prevent blockage and remove accumulated water. Especially for air conditioning systems that have been out of use for a long time, the remaining water must be completely drained before use. Legionella bacteria multiply highly in stagnant water bodies and spread through water mist produced by air conditioners. When inhaled by humans, they can cause respiratory infections. The humidity requirement in the textile workshop is relatively high, so it is even more necessary to pay attention to the smoothness and cleanliness of the drainage system to avoid it becoming a breeding ground for bacteria.
Ii. Inspection and Maintenance of Key Components: Ensuring Efficient operation
Textile industry air conditioners, as key equipment for maintaining a stable production environment, the state of their core components is directly related to the overall operational efficiency. The health of the refrigeration system is particularly important. Regularly checking the pressure of the refrigerant is an indispensable maintenance item. Abnormal pressure is often a precursor to system problems. A pressure that is too low may indicate leakage, while a pressure that is too high may suggest poor heat dissipation of the condenser or excessive refrigerant charge. Professional technicians should use pressure gauges for detection. If any abnormality is found, the refrigerant should be adjusted or replenished in time. It should be particularly noted that when replenishing the refrigerant, a product of the same model as the original must be selected. Mixing refrigerants of different models may lead to a decrease in system efficiency or even damage to the compressor.
The maintenance of fan systems is particularly important for textile air conditioners. Due to the large amount of fiber dust in the workshop, the fan impeller is prone to accumulate dust, resulting in dynamic balance imbalance and increased vibration. It is recommended to check the lubrication of the bearings every day and listen for abnormal noises. Clean the dust on the blades every month and check if the fastening screws are loose. According to the experience of industrial air conditioning maintenance experts, when lubricating moving parts, the lubricating oil or grease recommended by the manufacturer should be used. Keeping the motor bearings and fan bearings in good lubrication condition can reduce friction losses and extend their service life by more than 30%. If obvious vibration or abnormal noise of the fan is found, it should be stopped immediately for maintenance to prevent the fault from expanding.
Electrical safety inspection is the basis for preventing accidents. The electrical failure rate increases significantly during the hot season. Regularly check whether the circuit connections are firm, whether the terminals are oxidized or corroded, and whether the insulation is intact. The environment in the textile workshop is complex. Aging wires or loose connections may lead to serious consequences. A comprehensive inspection of the electrical system should include: measuring the insulation resistance of the motor (which should not be less than 1MΩ), checking the contact status of the contactor, and testing the reliability of the protection device, etc. It is recommended to conduct a comprehensive electrical inspection before the arrival of summer to eliminate potential hazards.
Calibration of the control system ensures the accuracy of environmental parameters. Textile production has strict requirements for temperature and humidity. The sensors in the air conditioning control system may drift, resulting in the displayed value not matching the actual value. Regularly calibrate the temperature and humidity sensors, check whether the controller display and operation are normal, and whether the actuator actions are sensitive. Factories with the necessary conditions may consider upgrading their intelligent control systems to automatically adjust operating parameters based on the temperature and humidity in the workshop. This not only ensures environmental stability but also significantly reduces energy consumption.
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