DEVICE FOR PREVENTING HEAT TRANSFER OF PULSE TUBE REFRIGERATOR

摘要

PURPOSE: A device for preventing heat transfer of a pulse tube refrigerator is provided to efficiently interrupt the transfer of compressed air generated by the acting of a driving unit installed on a compression unit of a pulse tube refrigerator to a cooling unit by the contact of a cylinder unit and a pre-cooler of an upper frame. CONSTITUTION: The device for preventing heat transfer of a pulse tube refrigerator has the components such as:a closed case(110) consisting of a closed shell(114) preventing the leakage of the acting gas; a driving motor(120) installed inside of the closed case(110) to generate the driving force; a driving shaft(130) combined to an actuator(122) of the driving motor to reciprocate in a straight line; and a piston(140) inserted into a cylinder unit(110a) of the closed case(110) as well as connected to the driving shaft to pump the acting gas while reciprocating in a straight line with the driving shaft.