Blockage in the water circuit of a refrigeration cycle can lead to a decrease in heat dissipation efficiency, equipment overload, and even malfunction. The core anti blocking logic is "source filtration+regular cleaning+water quality control". The specific methods are classified into "daily prevention, regular maintenance, and special scenario handling" and explained in detail
1、 Daily prevention: Reduce blockage hazards from the source
Strictly control the quality of water replenishment: prioritize the use of deionized water or distilled water, and avoid direct injection of tap water (containing minerals and impurities). If only tap water can be used, it needs to be softened first (by installing a water softener) to reduce the content of calcium and magnesium ions and minimize the formation of scale.
Install multi-stage filtration device:
Install a Y-shaped filter (with a mesh accuracy of 20-40) at the inlet to intercept large particles of impurities (such as rust and sediment), and regularly clean the sediment on the filter screen.
Connect precision filters (precision 5-10 μ m) in series in the circulation pipeline to filter out small suspended particles and prevent them from entering key components such as heat exchangers and valves.
Standardized water replenishment operation: Avoid rapid water flow during replenishment to prevent impurities deposited in the pipeline from being washed up; After replenishing water to the specified level, promptly close the replenishment valve to prevent overflow from carrying external impurities into the system.
Keep the environment clean: Avoid stacking dust and debris around the circulation device, regularly clean the dust on the equipment surface and near the water inlet, and prevent impurities from entering the waterway through ventilation openings or opening covers.
2、 Regular maintenance: Proactively remove potential blockages
Regular sewage flushing:
Open the drain valve at the lowest point of the pipeline every week to discharge a portion of the sewage (approximately 10% -20% of the total water volume), removing impurities and scale deposits at the bottom.
Perform pipeline flushing once a month: turn off the equipment, disconnect key components (such as heat exchangers), reverse flush the pipeline with high-pressure water flow, and remove soft dirt and impurities attached to the inner wall.
Clean core components:
Disassemble and clean the filter screen every month, use a brush to remove attachments, and if necessary, soak it in 5% dilute hydrochloric acid for 10-15 minutes (to remove scale), rinse it clean, air dry and reinstall it.
Disassemble and clean the heat exchange tubes of the heat exchanger and condenser every 3-6 months: use a high-pressure water gun to rinse the inside of the tubes, or use a specialized cleaning brush (matching the pipe diameter) to repeatedly wipe and remove scale and blockages inside the tubes.
Add water quality stabilizer:
Add corrosion and scale inhibitors (such as polyphosphates and organic phosphonates) in proportion to the water volume to suppress scale formation and metal corrosion. Check the water hardness monthly and supplement the chemicals as needed.
If there is slight microbial growth in the waterway (such as greenish or odorous water), an appropriate amount of bactericidal and algicidal agent (such as chlorine dioxide) can be added once a week. After each addition, let it stand for 2 hours before discharging.
3、 Special scenario handling: targeted solutions to high incidence congestion problems
Anti blocking measures after long-term shutdown:
Before shutting down, rinse the pipeline with deionized water 2-3 times to drain the sewage in the system and avoid residual water quality deterioration or scaling.
During the shutdown period, the machine should be turned on and cycled for 30 minutes every month, and at the same time, sewage should be discharged once to prevent bacteria and sediment from accumulating in the pipeline.
Enhanced protection in high humidity/dusty environments:
Increase the cleaning frequency of the filtration device (check the filter screen every 3-5 days), and replace the high-precision filter screen (accuracy 3-5 μ m) if necessary.
Regularly inspect pipeline interfaces and valve seals to prevent external moisture from carrying impurities into the system.
Anti blocking renovation of old pipelines:
Replace aging and rough inner wall pipelines (such as rusted iron pipes) with stainless steel or UPVC pipelines to reduce impurity adhesion and scale deposition.
Install pressure gauges in areas prone to blockage, such as before and after valves, and at the inlet and outlet of heat exchangers. If the pressure difference exceeds 0.05 MPa, promptly investigate for blockage.
4、 Key precautions
It is prohibited to mix different types of water stabilizers to avoid sedimentation caused by chemical reactions, which may lead to blockage.
Avoid using brushes with high hardness or highly corrosive cleaning agents during cleaning to prevent damage to the inner walls of pipelines and components.
If there is an abnormal increase in pipeline pressure, a significant decrease in flow rate, or a sudden drop in equipment cooling efficiency, it is necessary to immediately stop the machine for inspection, identify the blockage location, and clean it to avoid equipment damage caused by forced operation.