1. Daily appearance and connection inspection
Low temperature cooling circulation pumpBefore starting up daily, check the appearance of the equipment for any physical damage (such as deformation, scratches), and confirm that the connection parts such as inlet and outlet pipes and power lines are securely fastened without looseness. For example, gently shake the connection part to observe whether there is water droplet leakage or looseness, in order to prevent the risk of leakage or electric leakage caused by vibration or thermal expansion and contraction.
2. Coolant level and quality monitoring
The coolant level should be maintained between the lowest and highest marks. If it is insufficient, special coolant or deionized water should be added to avoid impurities or corrosive liquids from entering. Regularly check the condition of the coolant. If contamination (such as discoloration, suspended solids) or deterioration (such as odor, delamination) is found, it should be replaced within 6 months to 1 year to prevent corrosion of internal components of the equipment.
3. Cleaning of equipment surface and control panel
Wipe the equipment casing and control panel with a clean and soft damp cloth every week to remove dust and stains. Do not use corrosive cleaning agents or rough materials. When cleaning the control panel, a dedicated electronic device cleaner can be used to gently wipe it to ensure that the display screen clearly displays operating parameters such as temperature, pressure, and flow rate.
4. Pressure and flow regulation of the circulatory system
Observe the pressure indication of the circulation system during operation to ensure that the pressure is within the normal range. If the pressure rises abnormally, it may be due to pipeline blockage or circulation pump failure, and the machine should be stopped immediately for inspection. Adjust the coolant circulation flow rate according to experimental requirements to avoid excessive flow that increases equipment burden or insufficient cooling caused by insufficient flow.
5. Monitoring of equipment operation sound and vibration
The sound of the monitoring device during operation should be a smooth and low pitched noise. If there is sharp noise or severe vibration, it may be due to foreign objects, damaged components or imbalance inside the pump, and the machine should be stopped immediately for inspection. For example, check whether the impeller is stuck or the bearings are worn, and clean or replace the components in a timely manner.
6. Filter cleaning and seal inspection
Clean the filter every 1-2 months, rinse impurities with clean water after disassembly, and use specialized cleaning agents or ultrasonic cleaners for severe blockage. Check if the filter seal is intact. If any leakage or damage is found, replace it with a seal of the same specification in a timely manner to ensure correct installation.
7. Lubrication of moving parts and maintenance of bearings
Lubricate the pump shaft, bearings, and other moving parts every 3-6 months, select appropriate lubricants, and apply or add them according to equipment requirements. Check the bearing oil level and temperature daily. The oil level line should not exceed the specified value, and the bearing temperature should not exceed 75 ℃ (rolling bearings) or 70 ℃ (sliding bearings). Replace the lubricating oil after 800 hours of continuous operation of the equipment, and then replace it every six months thereafter.
8. Cooling system cleaning and temperature sensor calibration
Regularly clean the condenser dust to ensure heat dissipation efficiency. For example, using compressed air or a soft bristled brush to remove dust from the heat sink can prevent poor heat dissipation from causing equipment temperature to rise and performance to decline. Calibrate temperature/pressure sensors annually, compare and test them with standard thermometers and equipment sensors. If there is a significant deviation, adjust or replace the sensors in a timely manner.
9. Electrical system safety inspection
Check electrical components such as power cords, plugs, switches, relays, etc. every six months to ensure secure connections, no damage or leakage. Use a multimeter to check insulation resistance, grounding resistance, and other parameters to ensure compliance with safety standards (such as grounding resistance ≤ 4 Ω). If any electrical system problems are found, immediately contact a professional electrician for repair.
10. Maintenance and restart inspection of long-term disused equipment
ifLow temperature cooling circulation pumpLong term shutdown requires draining the coolant and rinsing the circulation system with clean water to remove residual liquid. Store the device in a dry, well ventilated place, away from direct sunlight and humid environments, and cover it with a dust cover. Before restarting, check the performance of the device, run it on power for 10-30 minutes, observe whether the parameters are normal, and promptly identify potential problems.