Adsorption heat desorption device

Abstract

The invention provides an adsorption heat desorption device. The adsorption heat desorption device comprises a refrigerator and an enrichment pipe and further comprises heat conducting bodies and a heat insulation cover, wherein the heat conducting bodies are installed on the refrigerating surface of the refrigerator, the enrichment pipe is buried in the heat conducting bodies in a bent mode, the heat insulation cover is arranged on the periphery of the first heat conducting body and the second heat conducting body and fixed to the refrigerator, and an air inlet and an air outlet are formed in the heat insulation cover. The adsorption heat desorption device has the advantages of being small in size, convenient to dismount and the like.

Description

technical field [0001] The invention relates to chromatographic analysis, in particular to an adsorption thermal desorption device. Background technique [0002] Low-temperature adsorption and thermal desorption devices are widely used in the analysis of the separation of low-boiling volatile organic compounds. Usually, samples are enriched at low temperatures and samples are desorbed at high temperatures to achieve sample separation. [0003] At present, the commonly used low-temperature adsorption methods mainly include: low-temperature refrigeration of semiconductor components; refrigerants (such as low-temperature refrigeration of liquid nitrogen); and ultra-low temperature adsorption and analysis devices for refrigerators. [0004] Semiconductor refrigeration has the disadvantage of low refrigeration temperature, the lowest refrigeration temperature is only -30 degrees; [0005] Refrigerant refrigeration has the problem of high refrigerant consumption. [0006] The lo...

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Problems solved by technology

[0007] 1. Difficult to maintain. The enrichment tube is placed in the copper tube of the refrigerator. When replacing it, a large number of joints and wiring need to be disassembled in a small space; then the enrichment tube is pulled out from the copper tube, and the left and right spaces of the instrument are required to be sufficient Large, which will cause the volume of the instrument to become larger

[0008] 2. There is a large amount of icing in and at the source of the cooling copper tube, which is easy to short circuit with the heating wire of the enrichment tube, and icing may cause serious problems such as inaccurate temperature measurement of thermocouples

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