Solid wood furniture is pure solid wood furniture, which is made of natural wood without further processing and does not use any artificial board. The natural texture gives the solid wood furniture a different kind of beauty and is also loved by people. The quality of solid wood furniture is mainly affected by external and internal aspects.

1.Temperature

Temperature is the main factor affecting the drying speed of wood. As the temperature rises, the water pressure in the wood increases, and the viscosity of the liquid free water decreases, which is conducive to promoting the flow and diffusion of water in the wood; the copper wire drying medium’s ability to dissolve moisture increases, accelerating the evaporation rate of water on the wood surface. But it is worth noting that if the temperature is too high, it will cause cracking and deformation of the wood, reduce the mechanical strength, discoloration, etc., and should be properly controlled.

2.Humidity

Relative humidity is an important factor affecting the drying rate of wood. At the same temperature and airflow rate, the higher the relative humidity, the greater the partial pressure of water vapor in the medium, the more difficult it is for the wood surface to evaporate into the medium, and the slower the drying speed; when the relative humidity is low, the surface moisture evaporates quickly The surface water content decreases, the water content gradient increases, the water diffusion increases, and the drying speed is fast. However, if the relative humidity is too low, it will cause cracking and drying defects such as honeycomb to occur or even increase.

3.Air circulation speed

Air circulation speed is another factor that affects the drying speed of wood. High-speed airflow can destroy the saturated steam boundary layer on the wood surface, thereby improving the heat and mass transfer conditions between the medium and the wood, and speeding up the drying speed. For hard-to-dry wood or when the wood moisture content is low, the moisture movement within the wood determines the drying speed; it is not practical to increase the evaporation rate of surface water by increasing the flow rate of the large medium, but will increase the water content gradient and increase the drying The risk of defects. Therefore, difficult-to-dry materials do not require a large medium circulation speed.

4.Wood species and structural characteristics

The wood of different tree species has different structures. The size and number of the pores and the size of the micropores on the pore membrane are very different. Therefore, the difficulty of water moving along the above path is different, that is, the wood species is affected The main internal cause of drying speed. Due to the large amount of filler in the ducts and pores of the hardwood broad-leaved wood (such as rosewood) and the small diameter of the micropores in the pore membrane, its drying speed is significantly less than that of the diffuse-hole broadleaved wood; in the same tree species, the density increases , The resistance of water flow in the large capillary increases, and the diffusion path of water in the cell wall is extended, making it difficult to dry.

5.Wood thickness

The conventional drying process of wood can be approximated as a one-dimensional heat and mass transfer process along the thickness of the wood. As the thickness increases, the distance of heat and mass transfer becomes longer, the resistance increases, and the drying speed decreases significantly

6.Wood texture direction

Wood rays are conducive to water conduction. The water conduction along the radial direction of the wood is about 15% -20% greater than that along the chord direction. Therefore, the chord cutting board usually dries faster than the radial cutting board.

Although the internal factors cannot be controlled, as long as the characteristics of the wood are guided according to the situation, the reasonable use of drying equipment and technology can also increase the drying speed, which can not only reduce unnecessary losses, but also improve the drying effect while maintaining the wood properties.

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