1. When purchasing cabinet cooling fans, first confirm the size of the cabinet, select the appropriate fan model and appearance for installation, and then determine the parameters such as voltage, airflow, speed, current, noise and other parameters.

2. Cooling fan voltage, which can be divided into DC voltage 5v, 12v, 24v and 48V; AC voltage 110V, 220v, 380v. If the wrong voltage is connected, the cooling fan will be burned out, and the cabinet will also be damaged, causing adverse effects.

3. Confirm the service life of the cabinet cooling fan. The service life of sleeve bearing is about 30,000 hours, the service life of the hydraulic bearing is about 40,000 hours, and the service life of the ball bearing can reach about 80,000 hours.

4. The quality of the stator and copper wire will also affect the quality of the cooling fan of the cabinet. (Copper wire includes pure copper wire, aluminum clad copper, and even iron clad copper. The stator is also divided into pure steel and steel strip). The quality of copper wire and stator directly affects the service life of the cooling fan. Good copper wire and stator increase the speed and directly affect the service time of the cabinet.

5. The power line is also very important. Confirm the required length of the line. If the power line is peeled off or copper wire is exposed at the welding place, do not use it. It will cause personal injury and electric shock if the consequences are serious.

6. Generally, the frame and blades of DC cooling fans are made of PBT material. Usually, the operating temperature of the cooling fan is between -10 ~ +70°C, and the humidity is between 20% ~ 85%. Beyond this range, the AC cooling fans made of aluminum alloy can be selected.