Integral Stirling cryocooler for low-temperature refrigerator

Abstract

The invention discloses an integral Stirling cryocooler for a low-temperature refrigerator. The cryocooler comprises a shell and an integrally-welded cold finger assembly coaxially arranged at one end of the shell, a piston assembly is arranged in the shell in a sliding mode and comprises an air cylinder mechanism, a pushing piston mechanism and a compression piston mechanism, the pushing piston mechanism slides in the air cylinder mechanism in a reciprocating mode, the pushing piston mechanism comprises a hollow piston head composed of a guide piston and a pushing piston, the guide piston and the pushing piston are made of a good heat conductor and a poor heat conductor respectively, and the compression piston mechanism is arranged between a pushing piston connecting rod at the upper end of the guide piston and the air cylinder mechanism in a sliding mode. The cryocooler provided by the invention can provide the refrigerating capacity exceeding hundred watts at the temperature of -86 DEG C, has high refrigerating capacity for the cooling requirement of the low-temperature refrigerator with the same volume and the same temperature zone, and can avoid the cooperative use of a plurality of refrigerating machines with small refrigerating capacity, so that the manufacturing cost of the Stirling low-temperature refrigerator is reduced.

Description

technical field [0001] The invention relates to a refrigerator, in particular to an integral Stirling refrigerator for a low-temperature refrigerator. Background technique [0002] Traditional low-temperature refrigerators usually use a cascade refrigeration system as a cold source. In recent years, with the increasingly stringent requirements for environmental protection and energy saving, the cascade refrigeration system has been greatly restricted, which has promoted the development of new cold sources for low-temperature refrigerators, such as the Stirling refrigeration system. The use of Stirling refrigerators has achieved the goals of high efficiency, high reliability, long life, green refrigerants, and wide cooling temperature ranges for low-temperature refrigerators. [0003] The existing integrated Stirling refrigerators for low-temperature refrigerators are mainly concentrated in the isothermal zone of -86°C to provide cooling capacity, but most of the cooling cap...

AI Technical Summary

Problems solved by technology

[0003] The existing integrated Stirling refrigerators for low-temperature refrigerators are mainly concentrated in the isothermal zone of -86°C to provide cooling capacity, but most of the cooling capacity can only meet low-temperature refrigerators with small storage capacity, the cooling efficiency is low, and the cooling temperature is high. With the increase of the storage capacity of low-temperature refrigerators, generally multiple refrigerators are required to cooperate with refrigeration, which is not conducive to the reduction of the cost of Stirling low-temperature refrigerators, and the cooperation of multiple refrigerators makes the refrigeration system poor in reliability and difficult to install and manufacture

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