Key factors in the selection of laser chillers

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The professionally produced laser chiller is a device specially designed for laser cooling and cooling.

Protection of CO2 laser tubes, YAG solid-state laser crystals and lamp riots during laser processing

In addition,

The full and constant laser cavity temperature is guaranteed by stable laser output power, no thermal deformation of the laser cavity, and consistent laser beam quality.

therefore,

Choosing the right laser cooling system can greatly improve the life and processing accuracy of the laser, and maximize the performance of the laser equipment.

So, how should the laser chiller be properly selected?

Laser chiller

What are the key factors in the selection?

Key factors for laser chiller selection:

one,

Cooling capacity

1, cooling capacity,

As the name suggests, the actual cooling capacity of the cooling system is the first indicator of laser cooling equipment selection.

2,

Generally, we can calculate the calorific value of the laser according to the photoelectric conversion efficiency of the laser, and then choose.

P heat = P laser / μ

Assuming that the thermal efficiency μ of the glass tube CO2 laser is generally 15%, the 80W laser requires a minimum of 80/0.15=533W.

That is to say, while generating an 80W laser, the laser injects 533W of energy, and the ineffective energy needs to be taken away by the water cooler.

3,

We determine the cooling capacity of the laser chiller based on the input power of the laser power minus the output power of the laser. For example, our commonly used RF lasers and solid-state lasers will indicate the rated full-power supply voltage and current. Taking a coherent 70W RF laser as an example, it requires a power input of 48V25A and an instantaneous 36A. It can calculate an input power of up to 1200W.

two,

Water flow and booster pump head

Generally speaking,

The cooling capacity represents the cooling capacity provided by the compressor, and the water flow represents the ability of the chiller to remove heat. This causes the phenomenon that people often see: a chiller with a nominal cooling capacity of 1000W is connected to an 80W glass tube, chiller Showing 25 ° C, the laser tube is hot and hot;

This is related to the water flow.

.

three,

Thermal efficiency and water volume

the above

Two

The concept introduces the concept of water cooling machine thermal efficiency and water volume, which is the working control mode of the compressor and the size of the water tank. Generally, the larger the tank, the better, but the different compressor control methods in design will be very different. This is the same compressor cooling capacity and water volume. The operation control mode with PID feedback function will greatly improve the cooling capacity of the overall system.

four

Temperature control accuracy

This index is completely derived from the requirements of the laser. For semiconductor lasers, the temperature control accuracy must be ±0.1 °C, which requires the compressor to predict the temperature change law, the adaptive load change, and generally the water cooler with integrated temperature control module is impossible to do. To this point. Of course, for CO2 lasers, the temperature requirements are ±2°C to ±5°C, and most of the dedicated water coolers on the market can do this.

Fives,

Water quality requirements and water filtration and water circulation system materials

,

This comprehensive indicator is often ignored, but it is very reusable and directly affects the life of the laser.

six,

For the CO2 glass tube laser, the lens at both ends belongs to the water flow dead angle, and it is easy to retain impurities in the water, resulting in poor heat dissipation. The micro-deformation of the lens directly affects the output beam quality and spot pattern of the laser.

The above is the introduction of Jinan Super Energy on the key factors of laser chiller selection.

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