Transparent constant-temperature heating apparatus and method with self-detection and calibration function

Abstract

The invention discloses a transparent constant-temperature heating apparatus and method with a self-detection and calibration function, which belongs to the field of contact melting and heat transferresearch, is used for heating and melting a phase-changing material at a constant temperature by combining a laser interference measuring technique, and assists the research on the thickness change ofa micro liquid membrane in the contact melting process. The transparent constant-temperature heating apparatus comprises a water-bath heating module, a temperature monitoring module, a computer collection and processing module and a feedback heating module. The basic constant-temperature heating function is realized by using the high heat conduction of foam metal and strong disturbance characteristic of a convection field; the passing of an interference light path is ensured by using conductive glass coated with an antireflection film; the temperature field on a flat surface can be monitoredonline during the operation of the apparatus by using a single-value correspondence between the resistance and temperature of a temperature measuring unit; an instruction is transmitted by the feedback heating module by using a temperature signal collected by the computer collection and processing module; and a heating circuit of the feedback heating module is used for realizing a self-calibrationcompensation temperature control function, so that the constant-temperature overall heating with higher accuracy can be realized.

Description

technical field [0001] The invention belongs to the field of contact melting heat transfer research, and mainly cooperates with laser interferometry technology to heat and melt phase change materials at a constant temperature, and to assist in exploring the thickness change of micro-liquid film in the contact melting process. Background technique [0002] Close contact melting has a wide range of applications in industrial fields, such as energy storage, nuclear technology, subtractive manufacturing, etc. Therefore, accurate prediction of the heat and mass transfer process and mechanism in the melting process is of great significance to engineering. At present, there are many theoretical predictions in this field, but they cannot meet the experimental requirements well. [0003] In the melting process, the thickness of the micro-liquid film and the flow state have a great influence on the heat and mass transfer. Laser measurement has the advantages of non-contact and high m...

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Problems solved by technology

For constant heat flow heating, ITO glass can be directly used for electric heating, which is easy to operate, but it is difficult to create a constant temperature heating environment, so most experiments stop at constant heat flow heating

In addition, in the current constant temperature heating method, another difficulty is that it is impossible to judge the constant temperature performance during the heating process. If a large number of thermocouples are laid in it, it will inevitably affect the thermal conductivity and light transmittance of the constant temperature heating platform.

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