Ceramic heater anti-leakage precautions
How do ceramic heaters prevent leaks? The quality of the ceramic heater itself and improper operation by the user may lead to leakage. To summarize here: Promise that the heating element will work under the following conditions: a. The relative humidity of the air does not exceed 95%, and there is no explosive or corrosive gas. b. The working voltage should not be greater than 1.1 times the extra value. The enclosure should be effectively grounded. C. Insulation resistance and dielectric strength ≥1mω: 2kv/1min.
The electric heating tube should be fixed, the heating area should be completely immersed in liquid or metal solid, and exhaust is strictly prohibited. When it is found that there is scale or carbon deposits on the surface of the tube body, it should be cleaned and used from scratch, so as not to affect the heat dissipation and shorten the service life. 3. When heating the air, the parts should be evenly arranged in a cross shape, so that the parts have excellent heat dissipation conditions and the air flowing through is fully heated.
When heating fusible metals or solid salts, alkalis, extracts, white wax, etc., the operating voltage should be lowered first, and then raised to the extra voltage after the medium is melted. Safety measures should be considered when heating saltpeter to avoid blasting. The wiring elements should be placed outside the insulation to avoid contact with corrosive, explosive media and moisture. The wire should be able to withstand the temperature and thermal load of the wire joint for a long time, and avoid excessive force when tightening the screw of the wire joint.
These parts should be stored in a dark place. If the insulation resistance is lower than 1ω for long-term storage, it can be smoldered in an oven at about 200 ° C, and heated under reduced pressure until the insulation resistance is restored. The magnesium oxide powder at the outlet of the electric heating tube should be maintained at the application site to avoid the entry of pollutants and moisture, so as to avoid leakage.