Method for measuring moisture content of objects to be dried, vacuum drying device and control method thereof

Abstract

The invention provides a method for measuring the water content of a dried object, a vacuum drying device and a control method of the vacuum drying device. The method for measuring the water content of the dried object is used for calculating the water content of the dried object in a drying container in the vacuum drying process. The method calculates the water evaporation amount of the dried object at the drying temperature according to the system parameter values of the drying container in the closed state and calculates the current water content of the dried object according to the water evaporation amount. The method for measuring the water content of the dried object is simple, convenient to use and easy to achieve, efficient in the measuring process, and wide in measuring range and reliable in measuring result. The invention further provides the vacuum drying device and the control method of the vacuum drying device. The vacuum drying device controls the drying process by conducting real-time measurement on the water content of the dried object, the control method can meet the requirements for rapidness and continuity, manual intervention is not required, and the preset target water content of the dried object can be accurately and rapidly achieved.

Description

Technical field [0001] The present invention relates to the technical field of vacuum drying, in particular to a method for measuring the current moisture content of the object to be dried during the vacuum drying process, a vacuum drying device designed based on the method, and drying the object to be dried to a target content through the vacuum drying device The method of water control. Background technique [0002] The device and technology for drying the object to be dried to a specific moisture content at room temperature or below the boiling point of water is widely used in all walks of life because of its characteristics of not destroying the physical, biological and chemical properties of the object to be dried . [0003] For example, U.S. Patent WO 1988002279A1 discloses a grain crushing process, and its solution requires that the water content of crushed grains be at least 23% but not higher than 30%. US patent WO2001092268A1 discloses a method for drying amoxicillin me...

AI Technical Summary

Problems solved by technology

[0009] The first object of the present invention is to provide a method for measuring the moisture content of the dried object, which can quickly and accurately measure the moisture content of the dried object during the vacuum drying process, and provide a basis for controlling the dried object to reach the target moisture content, thereby Overcome the existing measurement methods with long period, low efficiency, difficulty in meeting the requirements of speed and continuity, and the measurement results are easily affected and the accuracy is low.

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