High pressure tripping is the most common malfunction of refrigerated dryers when used in high-temperature environments. The staff conducted inspections as usual, but suddenly the equipment turned on a red light. No matter how it was restarted, the equipment continued to malfunction, alarm and shut down. At this moment when the staff were at a loss, the high-temperature product gas, which had not been dried and was filled with water vapor, was rushing into the rear production process, corroding the products and valve components. In severe cases, it could even cause the production line to stop! But there's no need to worry now, because next I'll reveal all the headache inducing reasons for jumping in high-temperature environments.

1、 Improper cleaning
Scenario: The air-cooled condenser has been in the forced convection zone caused by the fan for a long time, resulting in a large amount of willow catkins tightly adhering to the heat dissipation fins like insulation cotton, forming dirt thermal resistance and hindering the heat transfer of the copper tube.
Through enthalpy difference experiments, it was found that when the average thickness of ash on the heat transfer area of the fins reaches 4mm, the attenuation rate of fin heat dissipation is as high as 23.9%.
The situation continues to deteriorate, and the refrigerant will not be able to fully liquefy due to the lack of cooling, resulting in a continuous increase in condensation pressure.
Finally, if the pressure value on the high-pressure gauge exceeds 23 kilograms, the refrigerated dryer will trip.

Solution:
1. Usually, the "water washing method" is used
The disadvantages of this method are obvious. When the water pressure is too high or the operation is improper during cleaning, it can cause the fins to bend and deform, affecting the heat transfer efficiency of the condenser when it is used again.
In addition, this method is extremely wasteful of manpower and water resources when there are a large number of devices.
2. The "wind reversal method" can also be used
If there are professionals on site, they can try to modify the circuit to reverse the operation of the fan, changing the negative pressure zone from the previous forward rotation to positive pressure, and using the positive pressure of the airflow to remove dust attached to the gaps and surfaces of the fins.

2、 The ambient temperature is too high
1. Non explosion proof refrigerated dryers are mostly placed in air compression stations
There may be various external factors that can cause the aircraft to jump here
(1) The ventilation of the air compression station is too poor
Solution: Set up a separate air duct, which requires air compressor selection personnel to design according to the user's usage environment and requirements. The hot air that has undergone heat exchange is exported out of the air compressor room through the air duct, and even a fan or blower is installed at the outlet to enhance the export effect.
(2) A large number of devices working simultaneously within the station
Solution: Using water mist to cool the condenser has certain safety hazards. The condenser fins are made of aluminum, the pipes are made of copper, and the pH value of tap water is basically neutral. There is about 2.5 × 104mol/L oxygen dissolved in the water, which may cause oxygen consuming corrosion to the metal. A better approach is to add axial flow fans or regular fans to increase forced convection.
(3) Air compressor and refrigerated dryer are placed in the same space
Solution: Extend the pipeline connecting the air compressor and the refrigerated dryer, and transfer the refrigerated dryer to another room. If there are no conditions, insulation boards made of porous materials, vacuum insulation materials, or heat reflection materials can be used to insulate air compressors and dryers.

2. Explosion proof refrigerated dryers are generally placed outdoors
The most common reason for high-voltage tripping of explosion-proof refrigerated dryers placed outdoors in summer is direct sunlight.
Solution: Make a sunshade, which is economical and practical, and can greatly reduce the chance of jumping off the machine!

3、 Selection is too small
When choosing a refrigerated dryer, the buyer and seller failed to have rigorous communication on the specific parameters of the dryer, resulting in a smaller selection of the dryer model. If the flow rate of the user exceeds the rated flow rate of the dryer, it will cause the evaporation temperature to be too high, and the pressure will continue to rise until high pressure protection is achieved.
Solution: In the early stage of communication, the buyer should confirm whether the parameters they provide are accurate, and the refrigerated dryer manufacturer should also repeatedly review the technical solution.

Conclusion
With the continuous development of a global service network, creating value for customers has become a trend. The after-sales issues discussed today are actually directly or indirectly related to whether the initial communication is complete. This is also one of the directions that we at Lino are most concerned about. Until today, Lino still puts customer expectations and success in the forefront.
However, cooperation should be based on good cooperation between both parties, as the ancient saying goes: the ruler, minister, father, son, and son should each hold their own position. Every enterprise has its own positioning and areas of expertise, and companies need to learn from each other's strengths and weaknesses. Therefore, we believe that a successful innovative enterprise not only needs to understand what customers can do, but also needs to truly understand the limitations of their capabilities.