| 摘要 |
A vacuum drying apparatus is provided to increase energy efficiency with higher drying efficiency, as a chamber used for drying a dry object maintains high vacuum state by a dry type screw vacuum pump. In a vacuum drying apparatus capable of evaporating water contained in foods as a dry object(12) under low temperature and high vacuum conditions for drying the food to be dried while maintaining its original shape, the apparatus comprises a case-like chamber(10), a pumping unit(20), a heat exchanger(30), and a drain line(40). The chamber is where the dry object is accommodated therein, comprising a hot plate(11) heated by hot water circulation, and a hot water circulating pump(13) connected to the hot plate with its one end to supply hot water. The pumping unit is connected to the chamber to maintain a high vacuum state in the chamber, comprising a dry type screw vacuum pump(21), a cooling water circulating pump(22) preventing overheating of the vacuum pump, and a radiator(23) removing cooling water circulating via the cooling water circulating pump. The heat exchanger is for discharging water produced from the dry object within the chamber and condensing it. The drain line discharges the condensed water from the heat exchanger.
|
