With the rapid development of the handheld laser welding market, in recent years the use of water-cooled cooling method of handheld laser welding machine a large number of sales to the market, compared to the size of the traditional welding machine, the existing water-cooled handheld laser welding machine equipment size and weight still let customers feel too bulky, daily maintenance problems such as frequent maintenance so that the user is still suffering. Users expect the handheld laser welding machine towards miniaturization, lightweight, maintenance-free development trend, water-cooled handheld laser welding machine key breakthrough lies in the use of water-cooled heat dissipation.
At present, the development of handheld laser welding machine technology in the industry for the air-cooled cooling method of the call is particularly obvious, and hope that through the air-cooled cooling technology to further make the laser handheld welding machine more lightweight, miniaturization, maintenance-free, to enhance the user's experience, so that the use of its use is more closely related to the use of the traditional welding machine experience. Therefore, in the air-cooled cooling technology route also gave birth to two different air-cooled cooling program, so which program can better meet the product cooling needs, which program is more stable and reliable?
01. The heart of the laser: semiconductor laser chip
Handheld laser welding machine in the most important components is the fiber laser, regardless of which cooling methods need to ensure that the fiber laser good heat dissipation, and the core of the fiber laser heat dissipation is the laser in the semiconductor laser chip, which can be described as the heart of the laser, if the lasercan not get effective heat dissipation, which means that the chip's failure to increase the risk of long-term use of power attenuation increases, thus affecting the service life of the laser welding machine. If the lasercan not get effective heat dissipation, it means that the risk offailure and long-term use of power attenuation increases, thus affecting the service life of the handheld laser welder, is an extremely critical component. In the current technological development, the working life of the laserwill be rapidly attenuated with the increase of temperature, the normal working temperature of theitself needs to be maintained within 80 ℃, the general safety of the working temperature should be about 60 ℃.
02. Forced air-cooling VS air-conditioning direct cooling
First of all, let's first understand the advantages and disadvantages of the forced air-cooled heat dissipation method in the handheld laser welder;
Advantage: Forced air cooling technology is in the form of heat conduction, the heat generated to the aluminum radiator, through the fan blowing the rapid flow of ambient air, so as to achieve the natural heat transfer to the radiator. Compared to water cooling technology, air cooling does not require additional water cooling tanks, which can reduce the number and size of equipment.
Disadvantage: Due to the natural convection heat transfer method, its heat dissipation efficiency is more obviously affected by the ambient temperature, and it is impossible to guarantee the heat dissipation efficiency in high temperature environments, which leads to the elevation of the semiconductor laser chip, reduces the service life of the laser chip, and fails to meet the continuous and reliable operation in high temperature environments.
Why is it said that the forced air-cooled heat dissipation method can not guarantee the laserat high temperatures will reduce the service life of the laser chip, and even the risk of failure?
Semiconductor laseras a core component is encapsulated in a sealed metal shell, forming a complete semiconductor laser pump, in the work will release a large amount of heat, if a 1500W laser full-power operation, according to the pump electro-optical efficiency of 55% calculation, the semiconductor pump heat dissipation power of about 2100W, when the ambient temperature of 30 degrees Celsius, the semiconductor pump shell temperature of 44 degrees Celsius, the semiconductor pump shell temperature of about 44 degrees Celsius, the semiconductor pump temperature is about 40 degrees Celsius, the semiconductor pump temperature is about 40 degrees Celsius. When the ambient temperature of 30 degrees Celsius, the semiconductor pump housing temperature of 44 degrees Celsius or so, at this time the lasertemperature can reach 75 degrees Celsius or more, if the ambient temperature reaches 35 degrees Celsius or more, the laseroperating temperature will be higher than 80 degrees Celsius or more, facing a very high risk of failure, so for the traditional forced air-cooled cooling, the entire machine 2500W or so of the heat needs to be through the natural convection of the aluminum radiator to heat exchange, the difficulty can be said to be huge, coupled with the lasercooling power of about 2100W. The difficulty can be said to be huge, coupled with the risk of failure of the laserin high temperature operation, can not meet the equipment for long-term reliable continuous operation.
Let's learn more about the advantages and disadvantages of the active air-conditioning direct cooling technology in the handheld laser welding machine.
Advantage: The principle is to combine the air-conditioning compressor with the fiber laser, through the air-conditioning compressor will be gaseous refrigerant compressed into a high temperature and high pressure gaseous state, and sent to the condenser for cooling, cooled into a medium-temperature and high-pressure liquid refrigerant, medium-temperature liquid refrigerant throttled by the expansion valve to reduce the pressure, into a low-temperature and low-pressure gas-liquid mixture, through the internal laser to absorb the heat and vaporization, into a gaseous state, and then back to the The compressor continues to compress and continue the cycle of refrigeration, and the four-way valve makes the flow direction of Freon in the condenser and evaporator opposite to that of refrigeration during heating, so as to achieve the effect of heating.
Disadvantage: Due to the adoption of the technical principle close to the inverter air conditioner, its manufacturing cost is higher than that of the forced air-cooling heat dissipation method of the common radiator, and secondly, the weight of the equipment is slightly higher.
03. Three core advantages, redefine the new benchmark of air-cooling technology.
Compared with the more economical forced air cooling technology, the active air conditioner direct cooling technology has the following three core advantages:
Ultra-low power attenuation, stable performance, long-lasting doubling
Industry insiders know that the laserwill suffer serious irreversible damage above 80℃. Thanks to the "active air-conditioning direct cooling technology" excellent intelligent temperature control system, can ensure that the equipment in the full power of a long period of continuous work conditions, the semiconductor pump key lasercontinues to work below 70 ℃, after a year of continuous operation, the power attenuation ≤ 5%! The traditional forced air cooling technology can not realize the real-time regulation of temperature, lasertemperature can not be controlled in a reasonable range, resulting in forced air cooling technology equipment power attenuation is much higher than the active air-conditioning refrigeration technology, light damage to the laserresulting in shorter service life of the equipment, in serious cases, directly burned out the laser equipment can not be used. The use of active air-conditioning refrigeration technology products both in terms of service life, or power attenuation can perform better, greatly improving the user's equipment life cycle, reduce costs.
Challenging the limits of efficient heat dissipation without fear of cold and heat
Because the forced air cooling is relying on the rapid flow of air in the surrounding environment, take away the internal heat of the equipment, resulting in forced air cooling technology is greatly affected by the ambient temperature, the weather changes in the hot or cold season, the southern or northern regional climate, etc. will have a greater impact on the efficiency and stability of the forced air-cooled equipment, or even directly stop working, affecting the user's processing efficiency and the normal use of equipment. Active air-conditioning refrigeration technology using an independent compressor direct cooling program, making the cooling effect even in extreme weather conditions are still strong. Optical laser innovative ACC intelligent temperature control technology to ensure that the internal temperature of the laser is always stable, so as to protect the stable output of fiber laser equipment.
Higher Heat Dissipation Capability, Continuously Breaking the Upper Limit of Laser Heat Dissipation Power
As the power of the fiber laser rises, the heat generated will also rise linearly. Currently on the market using forced air cooling technology fiber laser power up to 1500W, higher power band laser if the forced air cooling technology, will not be able to take away the heat generated by the equipment, resulting in high internal temperature of the fiber laser, can not work properly. Translated with www.DeepL.com/Translator (free version)
