An experiment with air pressure.

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SUMMARY

This discussion centers on an experiment involving air pressure and its effects on a heated fan. When a piece of paper was placed at the back of the fan, it obstructed airflow, leading to overheating and the activation of a thermal switch. This switch prevents the fan from operating until it cools down, which explains the delay in the fan's functionality after removing the obstruction. Similar principles apply to hair dryers, where airflow is crucial to prevent overheating.

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  • Understanding of thermal switches and their function in electrical devices.
  • Basic knowledge of airflow dynamics and its impact on electronic appliances.
  • Familiarity with the operation of fans and hair dryers.
  • Concept of overheating and its protective mechanisms in electrical circuits.
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  • Research the design and function of thermal switches in electrical devices.
  • Explore airflow dynamics and its importance in cooling mechanisms.
  • Learn about the overheating protection features in various household appliances.
  • Investigate the principles of heat dissipation in electrical engineering.
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Electronics enthusiasts, appliance designers, and anyone interested in understanding the thermal management of electrical devices.

jaydnul
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Im at work and i have a heated fan by my side. I decided to do a small experiment with air pressure. I placed a piece of paper at the back of the fan to block in coming air and the whole fan shut off and wouldn't come back on for 5 minutes. What happened inside the fan that made it turn off? If it was a circuit breaker, wouldn't it just turn back on immediately after i removed the paper?
 
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The reduced air flow caused the fan to over heat, and it has a thermal switch to protect it. It then takes some time for the switch to cool down and reset. Same think happens with hair dryers - we used them dry boots, and you had to fan a way that alloed enough air flow to prevent a shut off.
 
The heat has to be dissipated in order to keep everything working within the fan. So if you place the paper behind, it reduces the flow of air thus causing fan to over heat. So, you need some time for it to cool and to reset.
 

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