Cooler of pulse tube refrigerator

Abstract

A cooling device for a pulse tube refrigerator, which can smoothly release the heat of the driving unit of the working gas when the external temperature of the refrigerator is high by constructing a compressed refrigerant type cooling loop, thereby increasing the Efficiency, the cooling device includes a drive unit that causes a reciprocating motion of the working gas; a refrigeration unit that includes a pulse tube that has a low-temperature portion generated by the reciprocating motion of the working gas flowing in the drive unit; and a compression induced A refrigerant type cooling element having a compressor, a condenser and an expansion section outside the supplementary cooler, which are sequentially connected to refrigerant pipes communicating with the supplementary cooler.

Description

technical field [0001] The present invention relates to a pulse tube refrigerator, in particular to a cooling device for a pulse tube refrigerator, which can release the heat of the working gas and the drive unit by using an additional cooler as an evaporator to form a cooling cycle , and the additional cooler gives priority to cooling the high temperature and high pressure working gas. Background technique [0002] Generally, a cryogenic refrigerator is a low-vibration and high-reliability refrigerator for cooling small-sized electronic parts and superconductors, and a Stirling refrigerator, a GM refrigerator, or a Joule-Thomson refrigerator is widely used. [0003] Such as figure 1 As shown, a common pulse tube refrigerator includes: a driving unit 100, which causes the working gas to reciprocate; The thermodynamic cycle of the gas produces a low-temperature part; an additional cooler 300, which is connected between the drive unit 100 and the refrigeration unit 200, and ...

AI Technical Summary

Problems solved by technology

[0024] However, when the operating temperature is high, the heat release efficiency of the air-cooled and water-cooled heat exchangers decreases, the temperature of the working gas flowing into the refrigeration unit increases, and the cooling efficiency decreases as the temperature of the working gas increases.

[0025] In order to compensate for the reduction in cooling efficiency, the drive unit has to increase the driving force, so the overall efficiency of the refrigerator is reduced

[0026] In particular, in water-cooled heat exchangers, it is difficult to construct a closed loop because it is difficult to fill the cooling water loop with cooling water, and an additional bubble discharge pipe is required due to the generation of air bubbles, because the circulating water in the loop The cooling water will flow out through the bubble discharge pipe, so it must be replenished at any time

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