Phase modulation type push piston pulse tube refrigerator and phase modulation method thereof

Abstract

The invention relates to a phase modulation type push piston pulse tube refrigerator and a phase modulation method thereof. The phase modulation type push piston pulse tube refrigerator comprises a compressor, a push piston system, a regenerator hot end heat exchanger, a regenerator, a cold end heat exchanger, a pulse tube and a pulse tube hot end heat exchanger, wherein the regenerator hot end heat exchanger, the regenerator, the cold end heat exchanger, the pulse tube and the pulse tube hot end heat exchanger are connected in sequence; the push piston system comprises a push piston front chamber and a push piston rear chamber; a compression chamber is arranged inside the compressor; the push piston front chamber communicates with the pulse tube hot end heat exchanger via a push piston front chamber connecting pipe; the push piston rear chamber communicates with the compression chamber via a push piston rear chamber connecting pipe; the compression chamber communicates with the regenerator hot end heat exchanger via a connecting pipe; and the push piston front chamber connecting pipe and / or the push piston rear chamber connecting pipe are / is provided with a resistance element. Compared with the prior art, only the push piston front chamber connecting pipe and the push piston rear chamber connecting pipe are changed, so that the phase modulation type push piston pulse tube refrigerator provided by the invention is simple in structural configuration and convenient to adjust.

Description

technical field [0001] The invention relates to a pulse tube refrigerator, in particular to a phase-modulating type moving piston pulse tube refrigerator. Background technique [0002] Since Gifford and Longsworth invented the first generation of pulse tube refrigerators in 1964, which is the basic type of pulse tube refrigerators, pulse tube refrigerators have been widely used. The low temperature part of pulse tube refrigerators has no mechanical moving parts and has mechanical vibration and The advantages of small electromagnetic interference, long life, and simple structure, high reliability. According to the theoretical research of pulse tube refrigeration, reducing the phase angle difference between the pressure wave and the velocity wave of the cold end heat exchanger of the pulse tube can improve the efficiency of the pulse tube refrigerator. At present, the commonly used phase-modulating pulse tube refrigerators include small hole type and inertial tube type. The ...

AI Technical Summary

Problems solved by technology

[0004] The piston stroke can be adjusted by adjusting the diameter of the piston push rod, the mass of the piston, and the diameter of the piston. This method needs to change the structure of the piston part of the refrigerator, which is inconvenient to operate and wastes materials.

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