Freeze drying method and accessory equipment

A drying method and freeze-drying technology, which can be used in drying solid materials, lighting and heating equipment, and drying solid materials without heating. , Improve the effect of freeze-drying efficiency

Active Publication Date: 2014-08-06
SHANGHAI XINXING MEDICINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Using the existing freeze-drying technology, it usually takes more than 30 hours to completely dry the material (reducing the moisture content to below 5

Method used

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  • Freeze drying method and accessory equipment
  • Freeze drying method and accessory equipment
  • Freeze drying method and accessory equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] figure 1 It is a three-dimensional schematic view of the freeze-drying device of the present invention in Embodiment 1, Embodiment 2 and Embodiment 3.

[0029] figure 2 It is a three-dimensional schematic diagram of the freeze-drying supporting equipment of the present invention in Embodiment 1, Embodiment 2 and Embodiment 3.

[0030] Such as figure 1 and figure 2 As shown, the freeze-drying equipment 10 includes: an ultrasonic generator 7 , four ultrasonic vibrators 6 and a flat plate 3 .

[0031] The resonance impedance of the ultrasonic vibrator 6 is 20Ω, the resonance frequency is 28KHz, the diameter of the bottom surface is 59mm, and the height is 68mm. The size of the plate 3 is 200mm*200mm*1.5mm.

[0032] The ultrasonic generator 7 is connected to four ultrasonic vibrators 6 , and the ultrasonic vibrators 6 are uniformly distributed and fixed at four right angles of the plate 3 .

[0033] The freeze-drying method adopted in the present embodiment one comp...

Embodiment 2

[0049]A kind of auxiliary equipment of freeze-drying method, tool is used in conjunction with freeze-drying machine, has the structure identical with embodiment 1.

[0050] The freeze-drying method adopted in the present embodiment two comprises the following steps:

[0051] (1) Peel and slice fresh bananas to obtain banana slices 4 with a diameter of 20 mm and a thickness of 8 mm, and store the apples in a refrigerator at 4° C. for later use.

[0052] (2) Connect the ultrasonic vibrator 6, the ultrasonic generator 7 and the plate 3 according to the same steps as in the first embodiment. Place the plate 3 on the shelf 2 of the freeze dryer 1, turn on the refrigeration function of the freeze dryer 1, set the temperature of the shelf 2 to -40°C, and pre-cool for 2 hours.

[0053] (3) Take out the banana slice 4 from the refrigerator, place it on the center of the four ultrasonic vibrators 6 on the flat plate 3, insert the thermocouple into the geometric center of the banana sli...

Embodiment 3

[0065] A freeze-drying method supporting equipment, used in conjunction with a freeze-drying machine, has the same structure as in Example 1.

[0066] The freeze-drying method adopted in the present embodiment three comprises the following steps:

[0067] (1) Peel and slice fresh apples to obtain apple slices 4 with a diameter of 40 mm and a thickness of 2 mm, and store the apples in a refrigerator at 5° C. for later use.

[0068] (2) Connect the ultrasonic vibrator 6, the ultrasonic generator 7 and the plate 3 according to the same steps as in the first embodiment. Place the plate 3 on the shelf 2 of the freeze dryer 1, turn on the refrigeration function of the freeze dryer 1, set the temperature of the shelf 2 to -50°C, and pre-cool for 4 hours.

[0069] (3) Take the apple slice 4 out of the refrigerator, place it at the center of the four ultrasonic vibrators 6 on the flat panel 3, insert the thermocouple into the geometric center of the apple slice 4; keep the temperature...

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Abstract

The invention discloses a freeze drying method and accessory equipment. The freeze drying method includes the steps that materials to be dried are precooled, and the freeze drying accessory equipment is built; a flat plate in the accessory equipment is placed on a shelf of a freeze drying machine to be precooled; the materials are placed in the center of an ultrasonic wave vibrator on the flat plate, a thermocouple is plugged, material freezing starts; power of an ultrasonic wave generator in the accessory equipment is adjusted, the ultrasonic wave generator is started, ultrasonic wave processing is conducted on the materials; ultrasonic wave processing is stopped, after freezing continues for a period, freezing is finished; the freeze drying machine is vacuumized, the temperature and drying time of the shelf are set, and primary drying and secondary drying are conducted on the materials. The accessory equipment comprises the ultrasonic wave generator, the ultrasonic wave vibrator and the flat plate. The freeze drying method and the accessory equipment have the advantages that the primary drying time is shortened, so that the total freeze drying time is shortened, and freeze drying efficiency is improved.

Description

technical field [0001] The invention relates to a freeze-drying method and supporting equipment, belonging to the technical field of drying. Background technique [0002] Freeze drying is a drying method suitable for the production of high value-added products, and is widely used in processing heat-sensitive and easily oxidized food, pharmaceuticals and biological products. The freeze-drying process is divided into two stages, the freezing stage and the sublimation drying stage. The freezing stage is to freeze the wet material into a solid state at a low temperature of -10°C to -50°C. In the sublimation drying stage, water is directly sublimated from ice crystals to water vapor under a low pressure environment of 10 to 40 Pa. The sublimation drying stage can be divided into primary drying and secondary drying. Primary drying removes free water in the material, and generally can remove 90% to 95% of moisture; secondary drying mainly removes bound water from the material. ...

Claims

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Application Information

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IPC IPC(8): F26B7/00F26B5/06F26B5/02F26B25/00
Inventor 周新丽戴澄张三强
Owner SHANGHAI XINXING MEDICINE
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