Freeze-drying method and apparatus for the same

摘要

A freeze-drying method by a far infrared heater including the steps of: mounting the frozen objects to be dried prior to heating in the containers in which an absorption power of the radiant heat from the far infrared heater and a thermal conductivity are high, respectively; mounting the said objects which are contained in the containers into the reduced pressure tank under an atmospheric pressure; heating the containers by the radiant heat from the far infrared heater disposed in the reduced pressure tank; and sublimating the frozen water contents of the objects in a reduced pressure state where sublimation of the objects occurs in the reduced pressure tank.

主权项

1. A freeze-drying apparatus is characterized in that the said freeze-drying apparatus includes a reduced pressure tank in which a far infrared heater is disposed along a sidewall, or the sidewall and a ceiling; a container carrier which conveys a plurality of containers to contain mounted objects to be dried into the reduced pressure tank, and supports the containers in a drying step; the containers having a high absorption power of radiant heat and mounted via a space in multistage of the container carrier; the frozen objects to be dried which are contained in the containers; a tray support member of the container carrier in which the respective containers containing the frozen objects to be dried are vertically arranged via the space on multistage so that the containers are evenly irradiated with heat radiated from the far infrared heater and in which the containers mounted on the respective stages are tilted at the same angle or at such angles that the containers are evenly irradiated with the radiated heat; and inside the reduced pressure tank, a control section including a heating temperature detecting section and a pressure detecting section is arranged in order to sublimate the objects to be dried in the reduced pressure state where the sublimation of the objects to be dried occurs in the reduced pressure tank; and outside the reduced pressure tank, a heating temperature control section of the far infrared heater to the containers and a pressure control section which controls the pressure inside the tank are arranged.