High frequency vacuum wood dryer is advanced wood drying equipment, which only needs electricity without boiler, environment friendly and easy to handle with. Comparing with conventional kiln dryer, HF vacuum wood dryer capacity is small and flexible, less factory space needed; efficiency is much higher (more than 10 times faster than kiln dryer). After seasoning, timber is kept straight and in high quality without cracking. Out-turn percentage of timber increased. HF vacuum wood dryer is the best choice for small and medium furniture manufacturers.
For industrial processing with high-frequency (Hf) electric current, two different frequency ranges may be distinguished: radio frequencies (Rf) below 100MHz, using open wire circuits, and microwaves at frequencies above 500MHz, using waves guides to transfer power to material contained in them. The term dielectric heating refers to both and the effects on materials, such as polarization and conduction, are similar. For industrial processing, international agreement designated the frequencies in Table 1 that are related to wavelengths in free space. However, other frequencies have been used for equipment with proper shielding.