In the production environment of refrigeration in a dust-free workshop, the stable operation of refrigeration equipment directly affects the cleanliness and production efficiency. Based on the temperature and humidity characteristics of the Grain Rain season in April 2025 and the daily maintenance requirements, the following systematic maintenance strategies are sorted out from three dimensions: daily maintenance, regular maintenance, and professional maintenance.

I. Daily Maintenance: Basic Support and real-time monitoring

Filter cleaning and replacement

Primary/medium efficiency filters: Check once a month. If dust accumulation causes the pressure difference to exceed the initial value by 50%, they need to be cleaned or replaced.

High-efficiency filter (HEPA) : Monitor once every six months. Force replacement when the pressure difference is ≥ 200% of the initial value to prevent blockage and insufficient supply air volume.

Cleaning method: Use a vacuum cleaner or compressed air to remove surface dust. Do not wash the high-efficiency filter with water.

Basic maintenance of condensers and evaporators

Condenser fin cleaning: Use a soft-bristled brush to remove willow catkins and dust every week to prevent a decline in heat dissipation efficiency.

Evaporator drain pipe blockage prevention: Check the drain outlet daily and flush the water pan with food-grade disinfectant to prevent algae growth.

Rapid inspection of the electrical system

Inspection of the electrical control cabinet: Confirm daily that the terminal blocks are not loose and the waterproof rubber strips are not aged. Start the dehumidifier when the humidity exceeds 60%.

Sensor calibration: The accuracy of the temperature and humidity sensor is spot-checked every week. If the deviation exceeds ±1℃ or ±3%RH, recalibration is required.

Ii. Regular Maintenance: Efficiency Optimization and fault Prevention

Deep maintenance of the lubrication and refrigeration systems

Compressor lubricating oil: Check the oil level and quality every 500 to 700 hours of operation. Replace it when it is cloudy or the water content is greater than 0.1%.

Refrigerant pressure monitoring: Use a composite pressure gauge to measure the high and low pressure values every quarter to ensure that the refrigerant charge meets the equipment standards.

Drying filter replacement: Replace the filter element once a year to prevent moisture from entering the system and causing ice blockage.

Maintenance of fans and transmission components

Bearing lubrication: Apply high-temperature grease to the bearings of the fan and water pump every quarter to reduce friction loss.

Belt tightness adjustment: Check the drive belt every six months. If the downward deformation exceeds 10mm, it needs to be tightened or replaced.

Intelligent system parameter optimization

Inverter load calibration: Adjust the frequency curve according to the seasonal load changes. In summer, increase the start-up threshold of the compressor to reduce energy consumption.

Heat recovery system commissioning: Utilize the heat energy from exhaust air to preheat fresh air, regularly clean the surface of the heat exchanger, and increase the recovery efficiency by more than 20%.

Iii. Professional Maintenance: Systematic Detection and Risk Control

Annual system leak detection and security verification

Refrigerant leakage detection: Use a halogen leak detector or an electronic leak detector to inspect the pipe interfaces and repair micro-leakage points.

Safety valve calibration: Entrust a third-party institution to conduct an annual inspection to ensure that the pressure relief value is within the range of 1.05 to 1.1 times the rated pressure.

Comprehensive assessment of air ducts and cleanliness

Internal cleaning of the air duct: A robot equipped with a dust collection device is used to clean the accumulated dust, and a suspended particle counter is used to verify the cleanliness.

Airflow uniformity test: Observe the airflow direction through smoke test and adjust the Angle of the deflector plate at the supply air outlet.

Emergency response plans and simulation exercises

Fault simulation: Every quarter, scenarios such as compressor overload shutdown and sudden power outage are practiced to test the switching response time of the standby unit (target ≤5 minutes).

Microbial contamination prevention and control: Microbial sampling should be conducted at the air supply outlets of the air conditioning system every six months. When the number of colonies exceeds the standard, the disinfection plan should be upgraded.

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Jiangsu Jincheng Air Conditioning Engineering Co., Ltd. is a comprehensive manufacturer of special air-conditioning equipment design, production, installation, and commissioning of clean room, electricity, tobacco, civil air defense engineering, medical clean room, clean room, electricity, tobacco, civil air defense engineering, medical clean room. Mainly produce JCZK combined air conditioning unit, cooling tower, glass steel ventilated galvanized sheet pipe, stainless steel pipe, polyurethane ventilation pipe and air conditioning accessories, Jincheng air conditioner is wide, the type, the unique model, superior performance, and user Favused.