Tongchi teaches you how to select the cooling fan

When choosing a cooling fan, it is not a random choice. There are steps. You need to choose step by step according to the steps before you can finally determine the type and model of the cooling fan you want. What are the steps for fan selection? Tongchi teaches you a six-step selection method for cooling fans. I hope you can choose the cooling fan you want through these six steps. u003cbru003e u003cbru003e u003cbru003e Step 1: Determine the operating voltage of the fan u003cbru003e u003cbru003e u003cbru003e The general cooling fan voltages are: 12V, 24V, 48V. After the voltage is determined, you can determine whether you need an AC AC cooling fan, a DC DC cooling fan, or an EC fan. The characteristics and advantages and disadvantages of each type are as follows: u003cbru003e u003cbru003e u003cbru003e AC fan: Features: Metal loose frame u003cbru003e u003cbru003e u003cbru003e Advantages: No adapter required, strong surge resistance, low unit price. u003cbru003e u003cbru003e u003cbru003e Disadvantages: The fan has a small rotation range, cannot adjust the speed, has no RD and FG signals, and has stall protection. u003cbru003e u003cbru003e u003cbru003e DC fan: Features: injection molded plastic frame u003cbru003e u003cbru003e u003cbru003e Advantages: safe voltage, more options for installation size and speed range, adjustable speed, optional RD and FG signals, blocking protection, etc. u003cbru003e u003cbru003e u003cbru003e Disadvantages: high speed and high noise u003cbru003e u003cbru003e u003cbru003e EC fan: Features: AC/DC power supply, injection molded plastic frame u003cbru003e u003cbru003e u003cbru003e Advantages: It can be used for full electric voltage, can be used for speed regulation, can be used for RD/FG, wide speed range, and protection such as blocking. u003cbru003e u003cbru003e u003cbru003e Disadvantages: weak anti-surge, high unit price u003cbru003e u003cbru003e u003cbru003e Step 2: Confirm the suitable fan type u003cbru003e u003cbru003e u003cbru003e Optional fan types: cross flow, axial flow, centrifuge, blower u003cbru003e u003cbru003e u003cbru003e Features of cross-flow cooling fan; large air volume, small air pressure u003cbru003e u003cbru003e u003cbru003e Features of Axial Fan: In and Out of Wind in the same direction u003cbru003e u003cbru003e u003cbru003e Features of centrifugal fan: 90 degrees in and out of wind, large air volume, high wind pressure u003cbru003e u003cbru003e u003cbru003e Features of the blower: the inlet and outlet wind is 90 degrees, the air volume is small, and the air pressure is high u003cbru003e u003cbru003e u003cbru003e u003cbru003e u003cbru003e u003cbru003e u003cbru003e Step 3: Confirm the air volume and pressure u003cbru003e u003cbru003e u003cbru003e Reference value: operating point, static value, PQ curve, speed, noise, current u003cbru003e u003cbru003e u003cbru003e Step 4: Determine the basic model parameters of the fan u003cbru003e u003cbru003e u003cbru003e Basic parameters; brand, model, size, voltage, current, speed, air volume, wind pressure, noise u003cbru003e u003cbru003e u003cbru003e Step 5: Confirm the fan bearing and IP protection level u003cbru003e u003cbru003e u003cbru003e Bearing type: oil bearing, hydraulic bearing, ball bearing u003cbru003e u003cbru003e u003cbru003e Bearing life: oil-impregnated bearing: 30000H/25° u003cbru003e u003cbru003e u003cbru003eHydraulic bearing: 30000H/40 degree u003cbru003e u003cbru003e u003cbru003e Ball bearing: 50000H/40 degrees u003cbru003e u003cbru003e u003cbru003e IP protection level: IP55: paint-proof can meet, can be waterproof, IP67: rain and water column can be protected IP68: can work in rain u003cbru003e u003cbru003e u003cbru003e Step 6: Confirm function and installation u003cbru003e u003cbru003e u003cbru003e Fan function selection: FG speed measurement function, RD alarm function, PWM speed control function, self-start function u003cbru003e u003cbru003e u003cbru003e Cooling fan installation; fan frame, lead, terminal, wire sequence u003cbru003e u003cbru003e u003cbru003e Fan frame: The through-hole lock screw must be selected, the fan frame with connecting post. u003cbru003e u003cbru003e u003cbru003e Leads: Leads are divided, paralleled, twisted, and separated by default. The length of the lead is from outside the frame to the terminal. u003cbru003e u003cbru003e u003cbru003e Terminal; commonly used terminal models: HX2.54, PH2.0, 2510, aircraft first. u003cbru003e u003cbru003e u003cbru003e After the above six steps, you have completed the selection of your cooling fan. After the selection is completed, the cooling fan manufacturer will make a product specification for you. After confirming that there is no problem, you can send samples, and the samples are in line with your own products. After that, you can place an order for mass production.