Thermophysical property measuring device

Abstract

The invention relates to a thermal physical property measuring device, which comprises a refrigerating machine (2) and a sealed vacuum cavity (1), wherein the refrigerating machine supplies cold energy to a sample to be measured so as to decrease the temperature of the sample to be measured to a measurement temperature, and the sealed vacuum cavity supplies a vacuum heat-insulating environment for measurement. The thermal physical property measuring device is characterized by further comprising a sealed sample chamber (8), a sample rack inserting pipe (6) and a sample rack (7), wherein the sealed sample chamber holds the sample to be measured; the sample rack inserting pipe is a tubular component; one end of the tubular component is a closed end; the other end of the tubular component is an open end; the closed end extends into the vacuum cavity (1); a first end of the sample rack is connected with the sample chamber (8); a second end of the sample rack is detachably and hermetically jointed with the open end of the sample rack inserting pipe (6); and the sample chamber (8) and the sample rack (7) which are connected mutually are suitable to be inserted into the sample rack inserting pipe (6). The device is mainly used for measuring the thermal physical property of the sample to be measured at a lower temperature, and compared with a conventional thermal physical property measuring device, the thermal physical property measuring device provided by the invention has the advantages that the sample is convenient and quick to replace, the test period is short, and the like.

Description

technical field [0001] The invention relates to a measuring device, in particular to a thermophysical property measuring device. Background technique [0002] Materials have many wonderful physical properties at low temperatures, and research on the properties of materials at low temperatures is of great significance for basic and applied research. Thermophysical property measurement devices for low-temperature and wide-temperature range materials mainly use low-temperature liquids such as liquid helium to provide cold sources. However, with the shortage of helium resources, the cost of liquid helium is getting higher and higher, and it becomes more difficult to conduct low-temperature tests in areas where the supply of liquid helium is difficult, and the cooling of liquid helium is slow. In recent years, thermal physical property testing devices using refrigerators as cold sources have appeared. However, these thermophysical property testing devices that use a refrigerato...

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Problems solved by technology

It can be clearly seen that the defects of this test device are: long samp

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