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Vacuum freeze drier

A technology of freezing equipment and vacuum drying, which is applied in the direction of drying solid materials, lighting and heating equipment, and drying solid materials without heating. The effect of power drop

Inactive Publication Date: 2007-10-03
SHUNDE POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the motor power of the vacuum pump or vacuum pump group is basically unchanged within this working range, and it is in a full-load working state, the energy consumption of the equipment is large.

Method used

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  • Vacuum freeze drier

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Embodiment Construction

[0010] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0011] As shown in Figure 1, it includes a drying chamber body 1, a heating shelf 2 located in the drying chamber body, a water vapor condenser 3 for condensing sublimated water vapor in the heated material, and a vacuum sensor for inductive drying chamber body 1. A gauge 5, a vacuum pump 4 for vacuuming and a frequency converter 6 for receiving the signal output by the vacuum gauge and performing frequency conversion; the frequency converter is electrically connected to the vacuum pump 4. The steam condenser 3 can be placed in the drying chamber body 1, or can be set separately. Adopt one vacuum pump 4 in the present embodiment, it also can be to adopt multiple vacuum pump groups.

[0012] When working, when the frozen material is put into the drying chamber 1, the vacuum pump 4 is started to vacuumize the drying chamber 1. When the vacuum...

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Abstract

The vacuum freeze drier includes one drying bin, heating shelves inside the drying bin, one water vapor condenser for condensing water vapor from the heated material, and one vacuum pump for vacuumizing. It features that the vacuum freeze drier includes also one vacuum gauge to sense the vacuum degree inside the drying bin, and one frequency converter to receive the output signal of the vacuum gauge and to output variable frequency, with the frequency converter being connected electrically to the vacuum pump. The present invention has the advantages of no aeration to the drying bin during drying, no contamination of the inflated air on the dried material, varying frequency of the vacuum pump motor, and lowered power consumption.

Description

technical field [0001] The invention relates to a vacuum freeze-drying equipment, especially a large-scale food vacuum freeze-drying equipment. Background technique [0002] In the design of vacuum freeze-drying equipment, the vacuum pump is selected according to the maximum demand. However, in the vacuum freeze-drying process, the requirements for the vacuum degree in the drying chamber are different depending on the type of material and at each stage of the drying process. The pumping speed of the vacuum pump or vacuum pump group is basically unchanged within this working range, so the existing vacuum freeze-drying equipment generally has an inflation valve in the drying chamber, and the vacuum degree in the drying chamber is controlled by controlling the inflation amount of the inflation valve. . Since the motor power of the vacuum pump or vacuum pump group is basically unchanged within this working range, and it is in a full-load working state, the energy consumption of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B5/06
Inventor 徐言生夏睿杨泽亮陈礼
Owner SHUNDE POLYTECHNIC
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