Benefits Of Hand Dryers
Last Updated on June 3, 2021 by Gabriel Goddy
Hand dryers are widely used tools. This is because of the benefit they serve. Have you considered knowing the benefits of hand dryers, and how they work? If you haven’t, then you are implored to read through this guide. As you read, do so with keenness, so you can grasp the important points.
What Is A Hand Dryer?
A hand dryer is an electric machine that makes use of a heating element and an air blower to dry the hands after hand washing. It is commonly used in public toilets as a cost-effective alternative to paper towels. It may either operate with the push of a button or automatically using a sensor.
The basic utility of a hand dryer is to dry hands using an electric source. Hand hygiene is a very important aspect in preventing the spread of communicable diseases. A washroom is a place where the presence of disease-causing microorganisms is very high as compared to other places. And if a washroom is meant for public use, then one can imagine the concentration of microorganisms in there.
Since many disease-causing germs spread through touch, hand dryers were devised so that people can dry their hands without actually touching the roll of paper towels available for common use in public restrooms.
Hand drying machines not only help in maintaining hygiene but also help in reducing the waste produced by the use of paper towels. Very often we use this machine in public restrooms or at home without actually knowing how it works. So, let’s see how a hand drying machine works.
The earliest hand dryer was patented in 1921 by R.B. Hibbard, D. J. Watrous, and J.G. Bassett for the Airdry Corporation of Groton New York. This machine was sold as a built-in model or freestanding floor unit that consisted of an inverted blower (much like a handheld blow dryer) that was controlled by a floor pedal. Known as “Airdry The Electric Towel”, these units were used in restrooms, barbershops, and factories. Airdry Corporation moved to Chicago and San Francisco in 1924 to centralize their distribution.
The hand dryer was later popularized in 1948 by George Clemens, who founded World Dryer and invented the Model A, World Dryer’s flagship model.  In 1993, Mitsubishi Electric introduced a new type of hand dryer “Jet Towel” that blows jets of air on both sides of the hand, pushing the water off rather than evaporating it.
Types of Hand Dryers
There are three main types of hand dryers available.
- Push-button Hand Dryers
These are the traditional hand dryers that most users are familiar with. You push a button to start the dryer. Although they are relatively inexpensive, some low-power models can take up to a minute to dry hands, thus consuming more energy.
- High-speed Hand Dryers
To address concerns with the energy use and time drawbacks with traditional hand dryers, manufacturers have developed higher-speed dryers, which can dry hands in 30 seconds or less time. The disadvantage is that they cost more than traditional dryers and, because they are more powerful, they tend to be noisier.
- Automatic Hand Dryers
One concern with push-button dryers is that they can be unsanitary because of all the germs that are on people’s fingers, resulting in germs being deposited on the dryer button. Automatic hand dryers, as the name suggests, start automatically when users hold their hands near them. This eliminates the need to touch the surface of the dryer. It is also more energy-efficient because it stops automatically when the hands pull away from the dryer.
Benefits Of Hand Dryers Are:-
Speed – The majority of hand dryers have a super-fast drying time. You can usually be good to go in less than 10 seconds which is brilliant for high traffic areas. They are also quick to fix if you do run into any problems. Hand dryers are quick and easy to maintain and it can take as little as a few minutes to finish the job.
Hygiene – Hand dryers are perfect for heavy traffic areas because they do away with the mess and waste which is caused by dirty paper towels. Dryers provide a hygienic alternative to paper towels as there is little risk of cross-infection from used towels. They are also more environmentally friendly as there would not be rubbish overload due to an excess of paper towels. Often people throw paper towels down toilets but the installation of dryers prevents this which is the customary cause of clogged toilets. Due to the hygiene advantages of hand dryers, they are beginning to replace the widespread use of paper towels in many public places.
Noise – It has long since been the case that high-performing hand dryers are thought of as being noisy. This is especially important in school bathrooms as lots of children find excessively noisy appliances fairly frightening. Modern hand dryers commit to reduce noise and manufacturers now frequently raise the bar in the manufacture of even quieter hand dryers.
Cost – As it has already been said, although they are more costly than buying a box of paper towels in the short term, in the long run, the costs matter. When selecting a hand dryer, you need to compare the cost performance against various criteria such as power consumption, ease of maintenance, and longevity.
It will not be a surprise to learn that the longer a hand dryer lasts, the lower the overall costs per dry and the increased return on your investment. Low on-going costs should be considered the perfect solution for very busy settings. When paper towels can often be found lying across the floor, a washroom will need constant cleaning and the prevention of blockages and related expensive repairs.
Hand Dryer Features and Benefits are numerous. They can be said to be a perfect option for the majority of situations and they can even save you money in the long term.
Features Of Hand Dryers
Before looking at specific models of hand dryers, it can help to spend some time thinking about what features you require.
- Eco vs high-speed
Airspeed is probably the biggest deciding factor when it comes to hand dryers. Along with air temperature, airspeed is what determines how quickly the user’s hands are dried. It may not seem like a long time, but most people are prepared to spend around ten seconds in front of the dryer before giving up in frustration and leaving with soggy hands – hardly good for user experience, or hygiene, for that matter.
As a rule, high-speed models are quieter and dry hands faster; the downside is that they are more expensive and use more electricity. Eco models are (unsurprisingly) more eco-friendly because they use less electricity, but they tend to be louder and take a longer time to dry; that being said, some high-end eco models boast impressively low decibel levels and drying times.
Quieter eco hand dryers may be preferable in venues such as care homes or schools, where a quiet and peaceful environment is desirable.
- Button vs hands-free
When it comes to operation, there are two basic choices: button and sensor. Button-operated hand dryers tend to be cheaper, but the fact that the user has to make physical contact with the unit means that there’s a higher risk of cross-contamination.
Sensor-operated hand dryers use infrared technology to ensure a completely hands-free drying experience, making them more hygienic, but you can expect to pay a little more than you would for a button-operated unit.
- Hands-under vs hands-in
With a traditional hand dryer, the user places their hands underneath the unit, while newer, blade-style models require the user to place their hands within the dryer itself.
Blade-style models have quicker drying times and are more efficient; however, the trade-off is that they can be less hygienic since there is a risk of the user making physical contact with the unit.
How It Works
- It starts with a sense
Much like the technology used in an automatic door, motion sensors are an essential part of how to hand dryers work. And – although they’re automatic – sensors work in quite a sophisticated way.
Emitting an invisible ray of infrared light, the sensor on a hand dryer is triggered when an object (in this case, your hands) moves into its path, bouncing the light back into the sensor.
- The hand dryer circuit comes to life
When the sensor detects the light bouncing back, it immediately sends an electrical signal via the hand dryer circuit to the hand dryer’s motor, telling it to initiate and draw power from the mains supply.
- Then it’s over to the hand dryer motor
How to hand dryers work to remove excess moisture will depend on the model of dryer you use, but all dryers have two things in common: the hand dryer motor and the fan.
Older, more traditional models use the hand dryer motor to power the fan, which then blows air over a heating element and through a wide nozzle – this evaporates the water from the hands. However, due to its higher power consumption, this technology is becoming a thing of the past.
How do hand dryers work today? Well, engineers have developed new types of dryer such as blade and high-speed models which force air through a very narrow nozzle, relying on the resulting air pressure to scrape water from the skin’s surface.
These models still use a hand dryer motor and a fan, but because no energy is needed to provide heat, the modern method is vastly quicker and makes the hand dryer less expensive to run.
- How to hand dryers beat the bugs
To blow air out, a hand dryer first has to draw air in from the surrounding atmosphere. Because washroom air contains bacteria and microscopic fecal particles, some people have jumped to conclusions about the safety of hand dryers – but the truth is, dryers are better at destroying germs than spreading them.
These days, it’s common for hand dryers to be built with a high-efficiency particulate air (HEPA) filter inside them. This clever piece of kit enables the hand dryer to suck in and trap over 99% of airborne bacteria and other contaminants, meaning that the air flowing onto users’ hands stays incredibly clean.
The Sterile – a new and revolutionary breed of the hygienic dryer – is the world’s first and only hand dryer that also continuously disinfects washroom air. Harnessing the power of UV light, The Sterillo breaks down harmful micro-organisms by removing their reproductive capabilities and effectively destroying them – that makes it the healthiest hand dryer on the market today.
So, there you have it – now you know the secrets of how to hand dryers work.
A hand dryer is a one-time investment that can serve its purpose for a long duration of time. Regular cleaning of the dryer is essential to maintain its efficiency. Janitors in charge of cleaning hand dryers must ensure that the air passage of the device is clean to maintain a steady flow of air.