What is a hand dryer?

Abstract: Friends who often go out to eat should be common. There are hand dryers in the bathrooms of hotels, hotels and restaurants, which can dry their hands in less than ten seconds, which is not only convenient and quick, but also avoids cross-infection and social embarrassment caused by wet hands. Hand dryer is a kind of sanitary ware used to dry hands or blow dry hands in bathroom. What is the principle of hand dryer? This paper introduces the related knowledge of hand dryer for everyone. Principle of hand dryer What is a hand dryer? Classification principle and maintenance method of hand dryers

What is a hand dryer?

a hand dryer is a sanitary appliance used in bathroom to dry hands or blow dry hands. The hand dryer overcomes the shortcoming that the existing hand dryer can't discharge air in multiple directions, which is easy to cause the skin temperature of hands to be too high. It aims to provide a hand dryer that can circulate air in multiple directions. It adopts the technical scheme that an air guide device is arranged at the air outlet of the hand dryer, and the air guide device is provided with air guide blades, so that the hand dryer can circulate air in a non-directional way through the rotation of the air guide device or the swing of the air guide blades.

Principle of hand dryer

1. The sensor detects the signal;

2. The heating circuit relay and the blowing circuit relay are controlled to be turned on according to the signal;

3. Start heating and blowing;

4. When the signal detected by the sensor disappears, the contact is released, and the heating circuit and the blowing circuit relay are disconnected;

5. Stop heating and blowing.

Classification of hand dryers

Heating-based type:

Power size: high heating power, above 1W, low motor power, less than 2W

Features: high air temperature, slow hand drying

Advantages: low noise, suitable for quiet space in office buildings

Disadvantages: slow hand drying, generally more than 3 seconds < It can reach more than 13m/s

Advantages: quick hand drying, generally within 1 seconds, suitable for food factories, pharmaceutical factories and electronic factories

Disadvantages: high price, suitable for factories and high-end places

Jet hand dryer:

Power: high-speed wind up to 95m/s

Features: energy saving, sanitation and intelligence.

2. Weight: Whether the installation location and materials are capable of bearing the weight of the hand dryer;

3. color: white and stainless steel are the best, and stainless steel paint is also a good choice;

4. Starting principle: infrared induction and light blocking induction can effectively avoid cross infection;

5. Installation mode: It is recommended to install on the wall, which is stable and durable;

6. Working noise: as small as possible under the condition of meeting the speed of hand drying;

7. Running power: the lower the better under the condition of meeting the dry hand speed and keeping comfortable; 8. Standby current: The smaller the better;

9, hand drying time: the shorter the better, the best is within 1 seconds; 1. Air temperature: The air temperature is between 35℃ and 45℃.

Manual for cleaning and maintenance of hand dryers

1: Periodic cleaning. Clean once a day, and thoroughly clean the inside and outside.

2: professional cleaner. Use professional cleaning products, and don't use them immediately after cleaning.

3: keep the appearance neat, clean and free of dirt.

Conclusion: With people's pursuit of health, convenience and quickness, hand dryers are increasingly favored in large factories, hotels, restaurants and office buildings, but hand dryers installed at home have not been widely popularized. In fact, hand dryers installed in the bathroom at home are used to replace towels and paper towels, which not only avoids cross infection, but also saves paper towels and avoids unnecessary embarrassment. Although the installation cost of hand dryer is high, many people think it is unnecessary, but it still depends on personal needs. If the bathroom at home is large and conditions permit, you can consider installing hand dryer to improve your quality of life!