Automatic wood drying oven – Modern technology used in industry

Automatic wood drying oven

Automatic wood drying oven are one of the modern and advanced technologies widely applied in the wood production industry. With outstanding features, this technology is increasingly focused and prioritized.

Overview of automatic wood drying oven

Definition and operating principle of automatic wood drying oven

Definition: An automatic wood drying oven is an industrial equipment system specifically designed to remove moisture from wood in a controlled manner, using automatic mechanisms to maintain and adjust conditions Optimal drying without constant human intervention.

Operating principle:

Drying process:

  • The wood is placed in a sealed drying chamber.
  • Hot and dry air is circulated through the stacks of wood.
  • Moisture from wood is transferred into the air through diffusion and evaporation.
  • The humidified air is removed and replaced with freshly heated and dehumidified air.

Automatic control:

  • The sensor continuously measures temperature, relative humidity in the drying chamber and moisture content of the wood.
  • The microprocessor control system compares the measured values with the programmed drying schedule.
  • Components such as fans, valves, heating systems and humidification systems are automatically adjusted to maintain optimal conditions.

Drying stage:

  • Heating stage: The temperature in the drying chamber is slowly increased.
  • Main drying stage: Maintains stable temperature and humidity to remove most of the moisture from the wood.
  • Balance stage: Adjust the moisture content in the wood to achieve the desired and uniform moisture level.
  • Cooling phase: Slowly reduce the temperature to avoid heat shock to the wood.

Advantages of automatic wood drying oven in industry

Use advanced drying technology such as hot air drying or vacuum drying
Use advanced drying technology such as hot air drying or vacuum drying

Compare natural drying and automatic oven drying:

Criteria Natural drying Drying by automatic oven
Drying time Several months to a year Days to weeks
Final humidity Uneven, weather dependent Uniform, precise control
Risk of cracking and buckling High Low
Customization capabilities Restrictions Flexible, customized according to wood type

Automatic wood drying ovens bring many outstanding advantages in the wood processing industry, from improving product quality, increasing production efficiency to long-term cost savings and environmental protection. Investing in this technology not only helps businesses improve their competitiveness but also meets the increasing market requirements for quality and sustainability.

Popular types of automatic wood drying ovens

Chamber type automatic wood drying oven

Main characteristics:

  • Also known as intermittent drying oven or batch drying oven.
  • The wood is loaded into a drying chamber and dried in a complete cycle.
  • Once completed, the entire batch of wood is removed and a new batch is introduced.


  • Sealed drying chamber with large door for loading and unloading wood.
  • Fan system for air circulation.
  • Heating system (usually steam pipe or heat pump).
  • Humidification system for humidity control.
  • Ventilation doors to regulate humidity and temperature.


  • Flexible, can adjust the drying cycle for each type of wood.
  • Good quality control for each batch of drying.
  • Suitable for many different types of wood and sizes.


  • Downtime between drying batches (when loading and unloading wood).
  • High energy consumption when starting each new drying cycle.

Continuous type automatic wood drying oven

Main characteristics:

  • The wood is fed into one end of the oven and moves continuously through different drying zones.
  • Dry wood is removed at the other end of the furnace.
  • Continuous operation, without stopping for loading or unloading wood.


  • The drying tunnel is long with many different temperature and humidity zones.
  • Conveyor or trolley systems for moving wood.
  • Multiple fans and heating elements along the tunnel.
  • Humidification systems at specific locations.


  • High performance, large output.
  • Energy saving due to no need to restart after each batch.
  • Suitable for large-scale production with uniform products.


  • Less flexibility in changing the drying process.
  • Difficulty handling different types of wood or sizes at the same time.
  • High initial investment costs.
Helps minimize labor and the risk of errors due to human factors
Helps minimize labor and the risk of errors due to human factors

Vacuum type automatic wood drying oven

Main characteristics:

  • Use low pressure (vacuum) to lower the boiling point of the water in the wood.
  • Heat is transmitted primarily through radiation and conduction, not convection.


  • The sealed drying chamber can withstand low pressure.
  • Vacuum pump system.
  • Heating plate (usually metal plate heated by electricity or steam).
  • Condensing system for steam recovery.
  • Dedicated pressure and temperature sensors.


  • Fast drying, especially effective with wood that is thick or difficult to dry.
  • Minimize the risk of wood cracking and deformation.
  • Low energy consumption.
  • Can be dried at low temperature, suitable for heat-sensitive wood.


  • High investment costs.
  • Drying capacity is usually smaller than other methods.
  • High operational and maintenance technical requirements.

Criteria for choosing the appropriate type of automatic wood drying ovens

  • Production scale: Continuous type drying ovens are suitable for large-scale production, while chamber type drying ovens are more flexible for small and medium production units.
  • Wood type: Vacuum drying ovens can handle difficult-to-dry or precious woods well, while chamber-type drying ovens are suitable for many different types of wood.
  • Quality requirements: If the highest drying quality is needed, a vacuum drying oven is a good choice, although the cost is higher.
  • Investment capital source: Chamber-type drying ovens often have the lowest investment costs, while vacuum drying ovens require the largest investment capital.
  • Available space: Continuous type drying ovens need large spaces, while chamber and vacuum type drying ovens may be suitable for more limited spaces.
  • Flexibility in production: If frequently changing wood type or product size, chamber-type drying ovens will be more suitable.
  • Energy consumption: If energy saving is a top priority, vacuum drying ovens can be a good choice, despite the high investment costs.
  • Drying speed requirements: If rapid drying is required, vacuum drying ovens have advantages, while continuous drying ovens are suitable for stable, continuous production.
Helps optimize every aspect of the production process
Helps optimize every aspect of the production process

The wood drying process uses an automatic wood drying oven

Preparation of wood before drying:

  • Classification of wood by size, moisture content and type of wood
  • Stack the wood into the drying oven, ensuring the distance between the wooden bars for air to circulate
  • Installation of moisture measuring sensors in representative locations in the wood lot

Set parameters for automatic wood drying oven:

  • Enter parameters for wood type, size, initial moisture and target moisture
  • Set temperature, air humidity and wind speed in the drying oven
  • Program the drying cycle to suit each type of wood

Automatic drying and monitoring process:

  • The system automatically adjusts temperature, humidity and air circulation according to the programmed cycle
  • The sensor continuously measures the humidity of the wood and the environment in the furnace
  • The control system automatically adjusts parameters based on data from the sensor
  • Record drying process data for analysis and optimization

Quality check after drying:

  • Measure the final moisture content of the wood using a moisture meter
  • Check for defects such as cracking, buckling, and curvature due to the drying process
  • Evaluate the color and surface quality of wood
  • Classify wood according to post-drying quality

Please contact us immediately to receive professional advice and optimal solutions for your needs.

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