The Air Handling Unit (AHU) is a centralized air handling system that originates from a centralized hot air heating and ventilation system that distributes heated air through the ducts. The basic centralized system is an all-air single-zone system that typically includes fans, heaters, coolers, and filter components. The AHU mentioned here refers to a return air system. The basic working process is: after the fresh air from the outside is mixed with a part of the return air in the room, the dust, smoke, black smoke and organic particles in the air are filtered through the filter.Harmful Substance.
Air humidification section
There are the following humidification methods: steam humidification; high pressure spray humidification; wet film humidification; moisture permeable membrane humidification; ultrasonic humidification;
Box (except for customers)
The selection principle of the cabinet is 2300mm and below, and the whole machine is transported. The unit height is more than 2300mm and the parts are transported. When the total high modulus of the unit is greater than or equal to 25 or the width modulus is greater than 25, the base channel is 100mm and the rest are 80mm.
Cooler selection
Table cold selection type water temperature deviation ± 0.5 ° C range
The water resistance is within 110Kpa (the coil can be graded before and after the water resistance is too large, or left and right)
When the oncoming wind speed > 2.9 m/s, it is necessary to add a water retaining plate (in areas with high humidity, such as Guangzhou, Shenzhen, etc., it is recommended to install a water retaining plate when the wind speed of the cold coil is higher than 2.8 m/s)
Fan selection
When the unit full pressure > 1200Pa, the rear inclined fan is selected.
Fan air outlet wind speed: direct air fan, tuyere wind speed "13m / s
No direct air blower, tuyere wind speed "15m/s
No volute fan: must be found by the manufacturer, no vortex fan function section is arranged on the flow before the fan section. For the direct connection of the fan motor, it is generally necessary to match the variable frequency motor.
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