Head of fan filter unit system is more complex, the control way is varied, including computer group control, several methods such as switch control, remote control, the use of concrete based on clean workshop central air conditioning system, the number of head, such as comprehensive consideration, in order to choose the most economic and reasonable control mode, to provide users with the use of the best solution. Each of these three control methods has its own advantages and disadvantages, so let's analyze them one by one.
I. computer group control
This method is based on bus design of equipment, USES the host conversion interface, from the main router from router, and then to four layers structure of head control module, the master can control up to nine main routers, each main router can manage 30 units from the router, and from a router to the greatest number of not more than two hundred units, each from the router can be controlled 30 head control module.
The advantages of this control method are that it is easy to control, can be adjusted, can achieve more complex applications, but also can achieve the centralized control and supervision of FFU, can achieve the control of the partition, subsystem, and this method also has the effect of energy saving. Its disadvantage is that the structure is more complex, difficult to debug, the cost is large.
Two, multi - switch control
This method refers to the installation of a power supply (with protection) and a speed switch to achieve FFU control. Its advantages are relatively simple structure, stable speed regulation, low cost; The disadvantage is that speed regulation and fault problems are very inconvenient to operate.
Three, remote control
This method is through infrared ray and other methods to convey the micro fan switch and speed control command, so as to achieve the control of FFU. Its advantages are simple structure, stable speed regulation, easy control, lower cost; The disadvantage is that the electromagnetic signal can interfere with the remote control, leading to the wrong operation, so the use of this method depends on the environment.
