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Double-chamber differential pressure type microwave vacuum freeze drying equipment

A technology of microwave vacuum and drying equipment, which is applied in the direction of drying solid materials, lighting and heating equipment, and combination of methods to dry solid materials, etc., which can solve the problems of reducing drying rate and so on.

Inactive Publication Date: 2009-12-23
NANJING AGRI MECHANIZATION INST MIN OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while reducing the microwave power and increasing the vacuum degree, the drying rate is also correspondingly reduced.

Method used

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  • Double-chamber differential pressure type microwave vacuum freeze drying equipment
  • Double-chamber differential pressure type microwave vacuum freeze drying equipment
  • Double-chamber differential pressure type microwave vacuum freeze drying equipment

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Embodiment 1

[0018] The double chamber body differential pressure type microwave vacuum freeze-drying equipment of the present embodiment is as figure 1 and figure 2 As shown, the upper rectangular chamber body is divided into an upper first chamber 2 and a lower second chamber 15 by a horizontally arranged polytetrafluoroethylene material transmission partition plate 3 . The side of the first chamber 2 is provided with an upwardly inclined microwave feeding device, which is composed of an upwardly inclined microwave feeding port 4 and a magnetron 1 placed at its end. Therefore, microwaves can be emitted to the top of the first chamber 2, and through reflection, the first chamber 2 becomes an ideal resonant cavity. The inside of the first chamber 2 is normal pressure (research shows that the absolute vacuum degree should be less than the discharge critical value of 3000Pa).

[0019] The material carrying device in this embodiment is a material tray 14 supported on the guide rails 12 on ...

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Abstract

The invention relates to double-chamber differential pressure type microwave vacuum freeze drying equipment and belongs to the technical field of food and drug machines; the equipment essentially consists of a chamber body which is provided with a microwave magnetron, and a cold trap which captures the water vapor; a material bearing device is arranged in the chamber body which is divided into a first chamber and a second chamber by a transmission flow-separating plate; the magnetron is positioned in the first chamber, the relative vacuum degree of which is less than the discharge critical value; and the material bearing device is located in the second chamber which is linked with the cold trap through a shielding overflowing sheet. By adopting the microwave vacuum freeze drying equipment, not only can adequate microwave generation power and ideal vacuum degree be maintained, thereby ensuring the required drying rate, but also the generation of discharge phenomena can be avoided as the discharge boundary conditions are inhibited respectively in the first chamber and the second chamber.

Description

technical field [0001] The invention relates to a freeze-drying device, in particular to a double chamber body differential pressure microwave vacuum freeze-drying device, which belongs to the technical field of food and drug machinery. Background technique [0002] Vacuum freeze-drying is to freeze the wet material to the temperature below its eutectic point first, so that the water in it becomes solid ice, and then sublimates the ice directly into water vapor under an appropriate vacuum degree, and then uses a water trap to remove the water. The technique of condensing the steam and thus obtaining the dried product. [0003] Freeze-drying has been widely used in the preservation of food, medicine and biological products, but the existing freeze-drying equipment usually adopts conventional heating methods such as electricity and steam, and it is difficult to overcome the shortcomings of low speed, long time and high energy consumption, which restricts its further developmen...

Claims

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Application Information

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IPC IPC(8): F26B7/00
Inventor 胡志超王海鸥钟挺胡良龙陈有庆吴峰王建楠谢焕雄曹士峰彭宝良
Owner NANJING AGRI MECHANIZATION INST MIN OF AGRI
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