An electric fan or fan is an electrically driven device that is used to create airflows to benefit people (especially to reduce body heat, lower body temperature, and help people feel cool and comfortable. roof), ventilation, ventilation, cooling, or any air-related effects in the habitat.

When operating, the electric fan consists of rapidly rotating blades that create air flows. Manufacturers design each electric fan to have different levels of rotation from the highest to the lowest. The operating principle of an electric fan is used a lot in everyday life, for example, a speedometer (an anemometer) and a wind turbine are often designed similarly to an electric fan.
Some of the most typical applications include air conditioning, temperature reduction systems, human convenience (such as electric table fans), ventilation (such as exhaust fans), screening (such as for separation of grain), remove dust (like a vacuum cleaner). People often use electric fans to dry clothes, hair, towels,

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Cooling Mechanism

The electric current flows into the motor of the fan, which will make the propeller rotate and push the airflow to the user. When there is no wind, the body always emits heat to stabilize the body, so it heats up the surrounding air, making us feel hot and sweaty. When the fan is turned on, the blades will rotate and form a wind that evaporates the sweat and creates a layer of cool air around the body. So the user will feel cooler. In fact, only humans and sentient creatures feel cooler when there is wind, but the actual ambient temperature does not decrease.

The first electric fan

The first electric fan was born in 1832, and one of its creators was Omar-Rajeen Jumala, who named his fan the centrifugal fan. The first electric fan with two blades was produced by the Croker and Curtis Electric Motor Company (C&C). Early propellers were usually made of fabric similar to windmills. Fans consisted of the following main parts: fan body with speed control switch, fan cage, impeller, fan motor, and diverter. Some fans have additional decorative accessories, such as lights, clocks, ….

Structure

The main parts of the fan

Fan motor. The fan motor is the electrically driven part of the fan through the electromagnetic principle. The motor is the heart that creates the wind for the fan. Today’s electric fan motors are created according to strict criteria of motor performance, vibration and noise during operation. A fan is considered to be of good quality if it has low vibration, low noise and generates less heat.

Propeller: It is the part that directly produces the wind. By the rotation of the engine, the propeller moves, and this movement creates a pressure difference between the front and rear, which generates the wind. Today, there are several rear wing models. 3 or 5-bladed, thin and thick wings. The factor that makes the wing effective is the strong wind when the fan is running, and the design of the wing will determine this.

Fan cage: The simplest part of the fan, but it is important to protect the fan user from the dangers of collision between the fan and the user.

Fan body. The fan body is the part that supports the motor and the propeller and helps the fan to stand in the right position during operation. The fan body is usually dynamically designed and can be inserted or removed as needed.

Fan base: Only a small circuit board is used to divide the numbers or a place to receive power from the wires.

The structure of the motor part of the fan

The copper coil (stator) wound on a ferromagnetic core is made up of many thin corrugated silicon iron sheets connected to avoid Focker currents.

The rotor is also made of many thin pieces of iron connected together and has a cast aluminum section connected to steel bars to connect the propeller to the tail to create movement for the splitter.

Capacitors are used to generate out-of-phase currents.

The aluminum housing is used for the coupling between the rotor and the stator.

The brass has a lubricant seat to reduce friction.

Operating Principle

When there is current flowing in a conductor wound on a ferromagnetic core made of thin silicon corrugated iron (also called silicon surface), many pieces are placed together to create a force acting on the rotor. Due to the different placement of the coils (running and starting wires) and the phase difference effect of the capacitors, attractive forces will be created in the stator that are not in the same direction as each other (collectively referred to as the effect of the tuning capacitors). (The AC reverse current creates 1 direction of rotation mainly for the propeller). Since these two attractive forces are different in time and direction, a rotating magnetic field is created inside the stator that spins the rotor.

To vary the speed of the fan, one winds some electric coils common to the running coils, creating a stronger or weaker magnetic field as the current increases or decreases due to changes in coil resistance. The fan runs faster or slower.

Classification

Types of fans, such as.

Vertical fans: used on the ground, the height can be changed and can be rotated.

Tabletop fans: These include ordinary tabletop fans and box fans. Ordinary tabletop fans can rotate but are fixed at a fixed height. Box fans usually have two layers of blades, which have the advantage of being easy to move.

Ceiling fans. There are two types: regular ceiling fans and decorative ceiling fans.

Wall fans

Ice fan

Fan from electronic tools

Box fan: This type of fan is quite neat, rectangular, square or spherical, with a barrier that rotates in different directions, avoiding children’s hands into the fan, keeping it safe if there are small children in the house.

Tree fan

Ventilators