Hair dryers are one of the most commonly used hair care appliances. But while they may seem straightforward, there’s a lot of engineering that goes into making a hair dryer safe for use. 

First, hair dryer manufacturers have to anticipate how their products might be misused. They then try to design a hair dryer that will be safe in the widest variety of conditions. Some common safety features found in hair dryers include automatic shut-offs, tip-over switches, and heat-resistant materials. These features help to prevent fires, electrocution, and other injuries that can occur when using a hair dryer. With so many safety features to consider, it’s no wonder hair dryers are such complex devices.

  • Safety cut-off switch. Believe it or not, hair dryers can get hot enough to cause serious burns. In fact, the air coming out of the barrel can reach temperatures of up to 140 degrees Fahrenheit (approximately 60 degrees Celsius). To prevent this from happening, hair dryers are equipped with a heat sensor that trips the circuit and shuts off the motor when the temperature gets too high. This hair dryer and many others use a simple bimetallic strip as a cut-off switch. When the strip is heated, it bends and breaks the circuit, shutting off the hair dryer. So next time you’re using your hair dryer, be grateful for this little safety feature.
  • Bimetallic strip. If you’ve ever used a hair dryer, you’ve likely noticed that it has a strip of metal near the grille. This strip is made out of two different metals that expand at different rates when heated. When the hair dryer is turned on, the strip heats up and starts to bend. This is because one of the metal sheets has expanded more than the other. Once the strip reaches a certain point, it trips a switch that cuts off power to the hair dryer. This safety feature helps to prevent accidents by making sure that the hair dryer doesn’t get too hot.
  • Thermal fuse. Most hair dryers have a thermal fuse included in the heating element circuit. This fuse will blow and break the circuit if the temperature and current are excessively high. This is a safety feature that helps to protect against overheating and catching fire. If your hair dryer stops working, it is likely that the fuse has blown. You can check this by opening up the hair dryer and inspecting the heating element. If you see a blackened or melted spot, this is an indication that the fuse has blown. Replacing the fuse is a relatively simple task that you can do yourself. However, if you are unsure or uncomfortable doing this, you can always take the hair dryer to a qualified technician for service.
  • Insulation. To understand why hair dryers need insulation, it helps to know a little bit about how they work. When you plug in a hair dryer, electricity flows through a coil of wire inside the barrel. The coil gets very hot, and the air flowing past it is heated as well. If the hair dryer didn’t have insulation, the outside of the barrel would get just as hot as the coil. That would make it too hot to hold, and you could seriously burn yourself. The insulation keeps the heat from escaping, so it stays where it belongs – inside the hair dryer. As a result, you can use your hair dryer without worrying about getting burned.
  • Protective Screens. Hair dryers work by drawing in air and blowing it over a heating element. As the air is drawn in, it also pulls other objects towards the hair dryer. This is why you’ll find wire screens covering the air intakes on hair dryers. Over time, lint and dust build-up on these screens, reducing the airflow and making the hair dryer less effective. To clean a hair dryer screen, simply remove it and brush away the lint. You can also use compressed air to blast away any stubborn debris. By keeping your hair dryer clean, you can ensure that it will work effectively for years to come.
  • Front grill. Hair dryers are a common hotel appliance, and most of us use them on a regular basis without giving much thought to their safety features. However, it’s important to remember that hair dryers can get very hot, and if you’re not careful, you could easily burn yourself. That’s why the end of the hair dryer barrel is covered by a grill made out of heat-resistant material. This screen helps to prevent small children (or other inquisitive people) from sticking their fingers or other objects down the barrel of the dryer, where they could be burned by contact with the heating element. So next time you reach for the hair dryer, take a moment to appreciate its safety features – they could literally save you from a painful injury.

This article is reproduced from We have full authority to do this as we are the designated Australian Agent for the full range of Aolga’s electrical appliances.

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