19040433A

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DC fans have become more and more popular in recent years. Generally speaking, DC fan is a fan driven by a DC motor. At present, its application and working principle can be roughly divided into three categories, which are 190403A and 19040433A.

190403A is a simple DC fan. It is equipped with an external control circuit, and the fan speed can be adjusted by controlling the external control circuit. The main components of the fan are made up of DC motor, impeller and external control circuit. The DC motor is used to provide power for the fan, and the impeller is used to generate airflow. When the DC motor starts running, it drives the impeller to rotate and generate a certain amount of air flow. The external control circuit is used to adjust the rotation speed of the DC motor and the output air flow.

The external control circuit of 190403A is composed of resistors, capacitors, transistors and other components. When adjusting the fan speed, the resistance of the resistors will be adjusted, which will cause the voltage on the collector of the transistors to change. Then the voltage on the collector will control the rotation speed of the DC motor, so as to achieve the purpose of adjusting the air flow.

19040433A is more complex than 190403A, which can use electronic integrated circuit (IC) control. It is mainly composed of DC motor, impeller, IC control circuit and other components. The main purpose of IC control is to provide the necessary electronic signals for the DC motor to make it rotate at the required speed, so as to achieve the purpose of adjusting the air flow. The external control circuit of 19040433A is composed of ICs, resistors, capacitors and transistors. The ICs can receive signals from the external control circuit, and then output different driving signals to the DC motor according to the signals, so as to adjust its rotation speed and consequently the air output.

In summary, 190403A and 19040433A are both DC fans. The difference between the two lies in their external control circuit. The external control circuit of 190403A is composed of resistors, capacitors, transistors and other components, while the external control circuit of 19040433A is composed of ICs, resistors, capacitors and transistors. The former is only able to adjust the fan speed manually, while the latter can use ICs to control and adjust the fan speed.

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