Double-door vacuum freeze-drying device

Abstract

The invention relates to a double-door vacuum freeze-drying device. The double-door vacuum freeze-drying device comprises a vacuum freeze-drying chamber, a trolley and a cold trap. The vacuum freeze-drying chamber comprises a chamber body, a traveling mechanism, double chamber doors and a drainage mechanism, wherein the drainage mechanism is arranged at the bottom of the inner side of the chamberbody; the traveling mechanism is arranged above the drainage mechanism; one or more sublimation pipelines are arranged between the cold trap and the top of the chamber body in a communicating mode. According to the scheme, the double-door vacuum freeze-drying device adopts the design structure of the double chamber doors. After being freeze-dried, products can directly go to a low-temperature discharge area. The possibility that the products are affected with damp again and suffer from bacterium breeding is reduced, the dry-wet separation effect is further improved, and the product quality isprotected better.

Description

technical field [0001] The invention relates to the field of freeze-dried food, in particular to a double-door vacuum freeze-drying device. Background technique [0002] Freeze-dried food is fast-frozen, dehydrated in vacuum ice, retains the original color, aroma, taste, nutrients and the appearance of the original material, and has good rehydration, and does not contain any additives. It is an ideal natural food Hygienic food. [0003] Vacuum freeze-drying, referred to as freeze-drying technology, refers to the use of the sublimation principle in a vacuum state at a low temperature of about minus 30-50 degrees, so that the moisture in the pre-frozen food is directly sublimated into water vapor in an ice state without melting the ice. Remove, thereby drying the food. [0004] Usually the freeze-drying plant is mainly composed of semi-finished product warehouse (feeding area), low-temperature warehouse (discharging area), cleaning area, weighing shop area and control room, ...

AI Technical Summary

Problems solved by technology

[0006] (1) Since the incoming material and the outgoing material are the same door, and the humidity in the feeding area is usually high, the material is in contact with the moisture in the feeding area again after freeze-drying, and it is easy to be damp again, resulting in insufficient dry-wet separation;

[0007] (2) The humidity in the feed area is relatively high, so it is difficult to control the growth of microorganisms, which increases the possibility of product contamination by microorganisms and affects product quality;

[0008] (3) During the operation, since the freeze-drying warehouse is in the form of one-in and one-out, the trolleys for feeding and discharging must abide by the principle of first-out, last-in, which will not only affect the efficiency of the operation, but also may affect the delay of the trolley There is a risk of slow freezing of materials due to the time of loading materials into the furnace, resulting in increased costs;

[0009] (4) When the existing material trolley enters and exits the freeze-drying warehouse, it needs to manually carry or squeeze the material tray on the trolley into the freeze-drying furnace in parallel, and the labor intensity is relatively large;

[0010] (5) The material trolleys of some manufacturers adopt the ceiling guide rail method, and the material trolleys are guided to the freeze-drying warehouse through the ceiling guide rails. However, after long-term use, iron filings or condensed water are easily dropped from the suspension rails to the material trolley due to friction. on materials that contaminate the product

Moreover, setting up the hanging rails also requires investment in construction costs, and there are restrictions on the site configuration of the factory area;

[0011] (6) The freeze-drying warehouse needs to be cleaned and drained regularly when in use, so a drainage ditch is often designed below it, and in most cases, the cleaning water flows directly to the freeze-drying warehouse door and is discharged into the drainage ditch, which causes The humidity near the warehouse door is high and mosquitoes are easy to breed

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