What Is an Electric Dryer?
An Electric Dryer is a device that dries objects containing moisture by means of electricity.
Electric drying is not efficient and is not widely used for industrial purposes. It is used for small food products and the production of small parts.
However, it has the advantage that the only utility required is electricity. They are also widely used for household purposes because of their simple and inexpensive construction.
For this reason, the Electric Dryer can be said to be one of the devices that have led the white goods industry both domestically and internationally.
Uses of Electric Dryers
Electric Dryers are used for a wide range of purposes and can be found in many places in the home, making it a device that is deeply rooted in our daily lives.
Typical examples include hair dryers that evaporate moisture from hair and clothes dryers that evaporate moisture from laundry. Some ordinary houses have indoor Electric Dryers built in. They are used in housing complexes in areas where large balconies cannot be taken or where land prices are high.
For industrial use, they are used as food dryers and for drying workpieces. Electric Dryers are mainly used as small dryers because gas drying is less expensive than electric drying when the size of the drying system becomes large.
Principle of Electric Dryer
Electric Dryers are very simple mechanical devices.
First, when the power is turned on, electricity is supplied to the electric heating wire, which releases heat.
In an open system, such as a hair dryer, the blower is activated at the same time, allowing any area to be dried.
In a closed system, such as a food dryer, an exhaust system simultaneously operates to push humidified internal air outward.
The exhaust system is selected to maintain or raise the temperature inside the system, within the capacity of the electric heating wire. In most cases, the exhaust system will continue to operate until the end of drying.
If electricity is continually supplied to the heating wire, the temperature will rise without limit. Therefore, thermoswitches or temperature regulators are used.
Thermoswitches and temperature regulators are used to turn the power supply to the heating wire on and off in order to maintain a constant temperature in the system. Since it is difficult to change the amount of heat generated by the electric heating wire, in most cases it is controlled ON-OFF.
A batch of dryers is completed by a humidity controller and timer control. Timers are often used because they are easy to control and inexpensive.
In large equipment such as plants, the exhaust system may be omitted as a separate unit.