Put the object in a certain temperature, humidity and pressure environment, and gradually reduce the temperature of the object. When the ambient temperature of the object drops below the "dew point temperature" of the environment, the moisture in the air gradually reaches a saturated state until dew is deposited on the surface of the object. This phenomenon is called dew condensation.
Define the dew point temperature:
Dew point temperature: From an application point of view, the temperature that allows the air around the working environment to release "condensation dew" is the dew point temperature.
Avoid condensation
Avoid condensation inside and outside the laser without air conditioning
Laser damage caused by condensation in the internal environment is not covered by the normal warranty of the laser!
For example, when using a laser that does not have its own air conditioner and is exposed to the working environment, once the cooling temperature is lower than the dew point temperature of the laser environment, moisture will be precipitated on the electrical and optical modules. If no action is taken at this time, condensation will begin to follow on the outer surface of the laser. Therefore, once you see condensation on the laser shell, it means that the internal environment has condensed. The work must be stopped immediately, and the working environment of the laser must be improved immediately.
Laser cooling water requirements
The laser cooling water temperature must be set above the dew point temperature of the most severe operating environment.
Avoid condensation inside and outside the laser with its own air conditioner
Lasers with built-in air conditioners may still cause condensation in the internal environment
When using a laser with its own air conditioner and exposed to the working environment, the cooling and dehumidification of the air conditioner will greatly reduce the dew point temperature of the environment inside the laser. Generally, the cooling temperature of the industrial air conditioner is set to be the same as the cooling water temperature.
When the ambient temperature is lower than 38°C, the industrial air conditioner can maintain the safety of the environment inside the laser, but there may be condensation on the surface of the laser housing. If the condensation does not form flowing water droplets, it is safe. If there are a large number of flowing water droplets and there are obvious water spots around the laser, a safe and non-condensing working environment must be established for the laser with air conditioning.
When the ambient temperature is higher than 38°C, the cooling capacity of the industrial air conditioner is not enough to maintain the safety of the internal environment of the laser, and condensation will still occur in the internal environment. After a long time, the external environment will also follow the condensation. Therefore, there should be no obvious heat source around the laser, and the hot air outlet of the water cooler should not face the laser.
In order to eliminate the risk of condensation in the laser environment, it is recommended to configure an independent air-conditioning room for the laser.
Avoid condensation in the processing head
If the processing is abnormal when the season changes or the temperature changes greatly on the day, you can check whether there is condensation in the processing environment.
Use the dew point temperature lookup table
Training end users to use the dew point temperature look-up table can effectively reduce the risk of condensation in the environment inside the laser and processing head.
The left side of the table is the current working environment temperature, the top side is the current working environment humidity, and the temperature at the intersection of the temperature and humidity parameters is the "dew point temperature" in this environment. That is: any object below this dew point temperature in this environment will have dew condensation on its surface. Therefore, the adjustment principle is as follows:
Dew Point Temperature Lookup Table
The way to avoid condensation is to reduce the temperature difference between the operating environment of the laser and its cooling temperature.
