▎ 摘　　要

NOVELTY - Polymerase chain reaction (PCR) instrument comprises semiconductor refrigerator (1), radiating fin-type radiator (2), heat pipe type radiator (3) located between semiconductor refrigerator and radiating fin type radiator and embedded on one surface of radiating fin type radiator towards the semiconductor refrigerator, where heat pipe type radiator comprises a flat type heat pipe or a cylindrical heat pipe, or the heat pipe type radiator comprises a micro heat pipe array. USE - PCR instrument for amplifying and amplifying specific DNA fragments, and is regarded as special DNA replication in vitro in the technical field of gene detection. ADVANTAGE - The PCR instrument adopts semiconductor refrigerator to realize temperature rise and temperature reduction of PCR reaction tube, side of semiconductor refrigerator, which is back to PCR reaction tube is provided with heat-radiating fin type radiator, heat-pipe type radiator is arranged between the heat-radiating fin type radiator and semiconductor refrigerator, temperature is rapidly conducted, and rapid temperature rise and fall is realized by combining heat-radiating fan and PID temperature controller, for example, at least 40 temperature cycles is completed within 5 minutes, so that detection time is effectively shortened, and detection efficiency is improved. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the polymerase chain reaction instrument. 1Semiconductor refrigerator 2Radiating fin type radiator 3Heat pipe type radiator 4First heat conducting layer 5Second heat conducting layer 6Radiating fan 7Polymerase chain reaction microfluidic chip