220V Countertop Freeze Dryer 4Kg Food Freeze Dryer For Home Use HM400

• One-key start,fully automatic run
• Color LCD Touch screen
• Powder coated housing
• SUS304 chamber and thermostatic heating trays reliable for food safety and easy for cleaning
• Clear acrylic glass door with direct observation of freeze drying status
• Full accessories, ready for use
• Optional: Premium vacuum pump,vacuum solenoid valve, vacuum pump inlet dust filter, vacuum pump outlet smoke filter, non-stick silicone food mat, SUS304 stainless steel exterior

Freeze-drying, or lyophilization, is an age-old method for preserving perishable items and enhancing their portability. It involves freezing materials and then lowering the surrounding pressure to allow sublimation of water. This technique dates back to Andean Indians in the 13th century but only became a refined, widely accessible technology in the 1950s. During World War II, it was first developed for blood plasma preservation due to its organic compatibility. Post-war, it expanded to consumer foods. Notably, in 1890, German scientist Albert Altmann freeze-dried organ pieces, and in the 1920s, Vansteenberghe and d’Arsonval patented a method for freeze-drying the rabies virus. The 1950s saw broader applications, including camping meals. NASA later adopted it for astronaut food, with freeze-dried ice cream famously used on Apollo and Gemini missions. In 1965, Nestlé launched the first freeze-dried instant coffee, popularizing the process. Historically, even Aztecs and Eskimos used early freeze-drying for biological samples. Modern freeze-drying involves freezing products in specialized chambers with controlled heating to form solid granules, determined by chamber speed and geometry.
Benefits include extended shelf life—7–8 times longer than fresh products—retained nutrition, and convenience. Freeze-dried foods are nutritious, cost-effective, and preserve dairy probiotics.
Senova, a global leader in freeze dryer innovation for 15 years, serves over 80 countries with reliable performance and support, now with an EU office in 2024.