Direct resistance heating and indirect resistance heating are two types of cold hydrogenation electric heaters. The former applies the power voltage directly to the heated object, causing it to heat up as current flows through it. The latter is easy to install, allows for quick replacement of the heating furnace, but requires a voltage regulating device during operation, has a shorter lifespan than alloy heating elements, and is generally used in high-temperature furnaces, where the working temperature exceeds the allowed temperature for metal heating elements, and in certain special applications. When starting the explosion-proof electric heater, the power switch must be turned on, and the emergency stop must be engaged. With no fault alarms, pressing the start button causes the contactor to engage, and the top of the voltage regulator becomes electrified. Since the heated object and heating element are separated, the type of heated object is generally unrestricted, and operation is simple. Main products include single-end, coarse diameter, special-shaped, high-power, and high-performance explosion-proof electric heating tubes.
Electric heaters are widely used appliances, including electric kettles, electric funnels, electric heaters, and more, all categorized under electric heating equipment.
The resistance wire of the duct electric heater is made of nickel (nie) and chrome (ge) alloys. When the temperature reaches above 800°C, due to the higher power of the electric heater, users may inadvertently overlook safety, which could easily lead to a fire. The factors contributing to a fire in an electric heater include:
(1) Placing an electric heater on or near flammable objects could lead to a fire under prolonged exposure to high temperatures.
(2) Inserting the wire end directly into the outlet without a plug can cause a short circuit and potentially lead to a fire.
(3) In the event that a heater becomes dislodged during operation, it is crucial to immediately disconnect the power source. Failing to do so could result in the electric heater continuing to heat up as the temperature rises, potentially igniting nearby flammable objects.
Therefore, when using electric heaters, it is imperative not to place flammable objects near them and maintain a safe distance. Electric heaters should be placed on a non-flammable base that does not easily overheat. They must be attended when in use and the power should be unplugged when not in use. In the event of a power outage during use, promptly disconnect the heater. Remember, avoid using electric heaters with excessively modified resistance wires as much as possible; replace the resistance wire promptly.
