Product Name: Snail Fan
Product Code: KX1907 Snail Fan
Size: 160*120*105mm
Weight: About 100g
Material: Wood + EVA + Battery Box + Motor + Plastic Components....
Packing: 200pcs
Box Specification: 600*550*450mm

I want to climb step by step, flying forward with the leaves at a higher point. The little sky, the tears and sweat that flowed, there is always my day. I want to climb step by step, flying forward with the leaves at a higher point. The little sky, the tears and sweat that flowed, there is always my day. Should I put down the heavy shell and find where the blue sky is? With the gentle wind gently floating, the injuries feel no pain. I want to climb step by step, waiting for the sun to look at its face quietly. The little sky has a big dream, the heavy shell wraps the gentle gaze. I want to climb step by step, flying forward with the leaves at a higher point. The little sky, the tears and sweat that flowed, there is always my day. Let the wind dry the tears and sweat that flowed, there is always my day. A nice snail song reminds us of the cute little snail. Next, let's make a snail fan and cool down in the hot summer.

Electric fans are an indispensable household appliance for us in summer to cool off and relieve heat. But do you know why opening a fan will bring a cool breeze that makes us feel cool? Do you know how fans rotate? I believe that after learning this experiment, you will understand the scientific principles behind it.

Experimental Focus:

Through DIY, I have a preliminary understanding of the working principle of a fan.

Experimental Purpose:

Understanding the Structure of a Simple Fan.

Experimental Cognition

The invention of the fan It is now difficult to find relevant information on who actually invented the fan. It is said that in 1882, the director technician of Crockard's Engine Works in New York, USA, Huie Scates Hoyera, was the first to invent a commercially available fan. The following year, the factory began mass production, with the initial fans being tabletop models with only two blades. In 1908, the American company, the Eck Engine and Electric Company, successfully developed the world's first electric fan with a wheel drive that can swing left and right. This type of fan prevented unnecessary 360-degree head movement, making it the mainstream for future sales.

Scientific Principles:

The main components of an electric fan are: an AC motor. Its working principle is: a wire coil in a magnetic field experiences force to rotate. The form of energy conversion is: electrical energy is mainly converted into mechanical energy, and since the coil has resistance, some electrical energy is inevitably converted into internal energy. Can an electric fan make the indoor temperature lower? The indoor temperature not only does not decrease, but it will increase. The reason for the temperature increase is: when an electric fan is working, due to the current passing through the coil of the electric fan, the wire has resistance, so it will inevitably generate heat, which will release heat, so the temperature will increase. But why do people feel cool? Because the body surface of the human body has a large amount of sweat, when the electric fan works, the air in the room will flow, so it can promote the rapid evaporation of sweat, combined with "evaporation needs to absorb a lot of heat", so people will feel cool.

Experimental steps:

1. Recognizing the Experiment Device
2. Use double-sided tape to fix the motor to the battery box.
3, install the fan blades on the motor, turn on the switch on the battery box, and the small fan will start spinning.

Hint:

The positive and negative leads of the battery box should not be in direct contact to prevent burning the hands of children.
You cannot use the electricity from household or school outlets directly for experiments, to prevent electric shocks and potential harm to people.

Science Expansion:

The possible reasons for a DIY electric fan not spinning.
1. Maintenance is poor, and there has been a long-term lack of lubricant. The fan shaft part needs to ensure that there is lubricant, otherwise the wind blade cannot be dragged by the motor above. If you are at home, you can choose to turn off the power, and then turn the wind blade, if it rotates stiffly, it is basically without lubricant.
2. Wear caused by long-term use. If an air conditioner is used for a long time, the motor will wear out, and the shaft sleeve of the motor will easily burn out after wear.
3. Overheating causes the fan to stop spinning. In the fan device, there is a motor, and there will be an overheating circuit breaker inside the motor. If there is a short circuit in the winding, it will cause the heat to increase within a short period of time, and under this condition, the motor will stop working.
4. The capacity of the starting capacitor decreases. As fans age, the capacitor's capacity decreases, leading to a reduction in the motor's starting torque, which is unable to drive the load.
5. Electrical faults, such as damaged wiring.

Scientific Inquiry: My assembled fan doesn't work (it's reversed), what should I do?