Integrated cold head used for co-axial pulse tube refrigerator

Abstract

A kind of integrated cold head is used to the coaxial vas freezer and the cold head is made of the high heat conductivity material and at the bottom along the outside around there is a flanged edge used to weld with the shell of storage cold equipment and in the middle of it opens a round hole and around of the round hole opens radial gap uniformly and the depth of gap is the same with the depth of round hole and there is coaxial opening a ring conduit used to the vas of freezer for inserting. The vas adapts with the inserted ring conduit tightly and the cold head adapts with the shell of storage cold equipment tightly and the flanged edge of cold head welds with the shell of storage cold equipment. So the outside of the ring conduit is the storage cold equipment's cold end gas uniform equipment and the inside of the ring conduit is the vas's cold end gas vane. And the gas in the storage equipment and the vas is conducted by the gap of the bottom of integrated cold head. The maxim merit of it is that: the heat exchange area is large and the affection of guiding flow is well and the points of welding are little and it can deliver the quantity of refrigeration of the vas freezer to the outside face of cold head effectively so it improves performance of the coaxial vas freezer largely.

Description

technical field [0001] The invention relates to a coaxial pulse tube refrigerator, in particular to an integral cold head for a coaxial pulse tube refrigerator. Integral cold head with uniform distributor and cold end heat exchanger. Background technique [0002] Since the pulse tube refrigerator does not have moving parts at low temperature, it has the advantages of small mechanical vibration, small electromagnetic interference, and long life. Furthermore, the structure is simple, the reliability is high, the impact resistance of the cold head is strong, and the control circuit is simple, so it has wide application value in aerospace, mobile communication base station, medical treatment and other fields. According to the position of cold storage and pulse tube in the pulse tube refrigerator, it can be divided into linear type, U type and coaxial type. The coaxial pulse tube refrigerator has the advantages of compact structure and convenient coupling with devices. A typic...

AI Technical Summary

Problems solved by technology

The common disadvantages of the cold heads in the above two patents are that the heat exchange area between the cold end heat exchanger and the working gas is small, and there is a gap between the cold end deflector of the pulse tube, the cold end deflector of the regenerator, and the cold head jacket. Therefore, the cooling capacity of the working gas at the cold end cannot be effectively transmitted to the outer surface of the cold head, thus affecting the utilization of the actual cooling capacity of the pulse tube refrigerator

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