Vacuum Microwave Dryer is an efficient drying equipment that integrates microwave internal heating with vacuum low-temperature environment. Its core value lies in solving the dual pain points of traditional drying: 'low efficiency' and 'easy damage to heat-sensitive components'.

I. Core Working Principle: Dual Drive of 'Internal Heating + Low-Temperature Vaporization'

The drying process is based on the synergistic effect of microwave energy and vacuum environment, consisting of 4 key steps:

1. Microwave Penetration and Energy Conversion: The microwave generator (magnetron) produces high-frequency electromagnetic waves at 2450MHz or 915MHz, which directly penetrate the material surface and are absorbed by internal polar molecules (mainly water molecules), converting into molecular motion energy.

2. Molecular High-Frequency Oscillation and Heat Generation: Polar molecules reverse direction with high frequency (billions of times per second) along the electromagnetic field direction, resulting in intense collisions and friction between molecules, enabling uniform heating from the inside of the material and avoiding the drawbacks of traditional drying such as 'external heat and internal cold'.

3. Vacuum Environment Reduces Boiling Point: The vacuum system (vacuum pump) reduces the pressure inside the chamber to -0.06~-0.09MPa, lowering the boiling point of water from 100°C to 30~60°C. Moisture in the material can vaporize quickly at low temperature.4. Rapid Steam Discharge: The vaporized water steam is continuously抽出 from the chamber by the vacuum pump, forming a closed loop of 'heating - vaporization - dehumidification', significantly shortening the drying cycle.II. Key Technical Features: Meeting the Needs of High-Value MaterialsBased on the above principle, the equipment has 3 core advantages, especially suitable for heat-sensitive and high-value materials:• Low-Temperature Protection: The drying temperature is controllable between 30~60°C, which can maximize the retention of heat-sensitive components in the material. For example, the retention rate of active ingredients in Chinese medicine exceeds 90%, and the loss rate of vitamin C in food is less than 5%.• High Efficiency and Energy Saving: Microwaves act directly on the internal part of the material without thermal conduction loss, with a thermal efficiency of over 80%. The drying time is only 1/3~1/5 of that of traditional vacuum drying, saving 30%~50% energy.• Uniform and Undamaged: The penetration of microwaves enables synchronous heating of the inside and outside of the material, avoiding 'surface caking and internal moisture'. The moisture content of the dried material is uniform (deviation ≤1%), with intact shape and stable color.III. Typical Application Fields: Focusing on High-Requirement Drying ScenariosThe equipment is mainly used in fields with high requirements for drying temperature, component retention, and morphological integrity:• Pharmaceutical Field: Drying of Chinese medicine extracts, vaccines, enzyme preparations, and biological reagents to ensure no loss of pharmacological components and compliance with GMP standards.• Food Field: Drying of fruit and vegetable chips, probiotic powders, high-end seasonings, and health products to retain original flavor, color, and nutrition.• New Materials Field: Drying of nanomaterials, lithium-ion battery cathode materials, and special ceramics to avoid high-temperature damage to material structure and improve performance stability.