There are many methods for wood drying in wood industry. Such as air drying, solar kiln, conventional kiln, lumber vacuum kiln, and HF vacuum wood dryer kiln. Among of them vacuum kiln drying have special advantages in wood drying. And the vacuum kiln machine getting more and more popular for woodworking. Some friends ask what’s the difference between HF vacuum wood dryer kiln with lumber vacuum kiln?
No matter HF vacuum wood dryer kiln or vacuum timber dryer, they are both belong to vacuum wood dryer. The vacuum principle is same. Both of them is use a vacuum pump suck air out. The wood drying process is under vacuum condition. As all we know, vacuum is lower the water boiling point. Water molecule start to vaporize at 40-50℃ when the vacuum chamber at -0.07 ~ -0.08Mpa. So the timber is drying by low temperature and without oxygen it is helpful to faster drying process and keep wood nature color.
Heating Methods Of Common Vacuum Timber Dryer Kiln.
For the common vacuum kiln it is use heat plates. Each pcs of lumber is sandwiched by heated plates (filled with water and oil) use electricity to heat the water and oil inside the plate. And then transfer the heating to lumber. This kind of heating methods of vacuum kiln dryer for lumber is same with conventional or traditional kiln drying. It is heating transfer from wood surface to the core of wood. So this is kind of dryer kiln for lumber which is thin thickness. But if for some thick slab drying. It is need longer time and more power to avoid inside wet but surface dried.
Heating Methods Of HF Vacuum Wood Dryer Kiln
The high frequency vacuum wood dryer kiln is high frequency medium heating. It is also called radio frequency heating. It is advanced heating methods in wood drying industry. The principle is using electricity field to make make the water molecule in the wood make high speed fabrication. And then creating heating from wood inside to outside. It is using the wood as capacitor, from the stacking picture you can see the difference. There is no any stick or plate between two pcs of wood. It is kind of directly heating. So the temperature is uniform inside and outside. For hundreds mm thickness wood slabs drying process it is also no problem. If you want to know more information about the HF vacuum wood dryer kiln, welcome contact us.
