Microchannel Throttling Cooler

Abstract

The micro-channel throttling refrigerator according to the present invention includes: an upper cover plate stacked in sequence, a plurality of recuperation throttling parts stacked up and down, and a lower cover plate, wherein the recuperation throttling parts include high-pressure recuperative throttling parts stacked up and down The channel plate and the low-pressure channel plate, the high-pressure channel plate includes a high-pressure inlet and outlet section, a high-pressure heat exchange section, and a high-pressure evaporation chamber arranged in sequence, and the high-pressure heat exchange section includes a first-stage channel section, a high-pressure pre-cooling section, and a second-stage channel section arranged in sequence , the first flow channel and the second flow channel are two concave S-shaped grooves respectively, the two ends of the S-shaped grooves are arranged along the length direction of the first channel section, and a plurality of X-shaped convex structures are arranged in the high-pressure pre-cooling section , a plurality of X-shaped protrusions are arranged in a rectangle, the third flow channel and the fourth flow channel are two concave S-shaped grooves respectively, the two ends of the S-shaped grooves are arranged along the length direction of the first channel section, and the third flow channel One end of the passage communicates with the pre-cooling section, the other end communicates with the fourth passage, one end of the fourth passage communicates with the third passage, and the other end communicates with the evaporation chamber.

Description

technical field [0001] The invention belongs to the field of throttling refrigeration, in particular to a series-connected two-stage S-shaped laminated microchannel throttling refrigerator with a precooling device. Background technique [0002] With the miniaturization of electronic products, rapid cooling technology in a small space has attracted extensive attention from scholars at home and abroad. As a kind of cryogenic refrigerator, the miniature J-T effect throttling refrigerator is characterized by small size, short cooling time, and especially no moving parts. At present, the main J-T effect refrigerators are mostly Hampson type (spiral finned tube type). The stainless steel tube with an outer diameter of 0.5mm-1mm is wound around the mandrel, and the high-pressure gas flows through the entire stainless steel tube and enters the capillary throttling of the tube head. . The throttled low-pressure gas flows back and skims the outer fins of the stainless steel tube to ...

AI Technical Summary

Problems solved by technology

However, the temperature drop of multi-layer multi-channel micro-channel throttling refrigerators at this stage is limited, which cannot meet the needs of deep low temperature

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