On the issue of professional efficiency and heat dimming system
Time：2015/1/14  Viewnum：4077

Currently, the popular closet cooling system in the world there are three kinds: forced air, forced ventilation and intelligent ventilation.

     (1) forced air

     The cooling system is installed at the bottom of the blower in the closet, so that fresh air enters from the bottom of the closet accelerate blow up, so take away the heat generated by the SCR.

     The advantage of this approach is highly efficient, with a small fan can put a lot of tropical away. Its disadvantage is pumped from below into the flow of cold air on the way up the continuous heating power is SCR, SCR temperature so much higher than the top of the bottom, resulting in the top of the thyristor reliability and lifetime decreased.

     (2) Forced ventilation

     The design of this system is the exhaust fan mounted on top of the closet. Through the appropriate process design allows fresh air to enter from the front of each SCR, and then through the ventilation of hot air discharged outside the closet.

     This approach through sophisticated design (fluid dynamics) and rigorous process control, can be done from the top in the end the Ministry of every SCR roughly the same amount of wind, so you can make every thyristor in an acceptable within the operating temperature range, to ensure the reliability of each thyristor. However, this design also has the disadvantage that drag large, need to increase the power of the exhaust fan, so noise is also bigger.

     (3) intelligent ventilation

     Under normal operating conditions due to the dimming system is rarely full, so that the desired amount of ventilation can be relatively reduced. Intelligent ventilation is based on this theory, temperature probe inside the closet, and then decide the amount of ventilation, under normal operating conditions the fan just low speed, the noise is relatively lower, but when the load increases, the fan will accelerate accordingly. Thus, not only retains the advantages of forced ventilation, and also solve the shortcomings of high noise.

     Finally, it is worth mentioning that, even with the high efficiency and good dimming cooling system, but the dimming system is always a great deal of electrical power systems. And the emergence of high-temperature arcing phenomena is impossible to completely avoid. Only in high efficiency and good heat dissipation on the basis, supplemented by the necessary high temperature and fire prevention measures (such as the use of high-temperature flame-retardant line) before use to ensure the safety of the entire dimming systems.