Two-stage rectangular stacked microchannel cooler

Abstract

According to the present invention, the two-stage rectangular laminated microchannel refrigerator comprises an upper cover plate, an upper inner cover plate, a plurality of high-pressure channel plates and a plurality of low-pressure channel plates stacked up and down in a staggered manner, a lower inner cover plate, The lower cover plate and the high-pressure channel plate are rectangular, including a heat exchange section and an evaporation chamber arranged in sequence. The heat exchange section includes a first channel section, a pre-cooling section, and a secondary channel section arranged in sequence. The first flow channel, the second flow channel, the third flow channel, the first flow channel, the second flow channel, and the third flow channel are all concave linear grooves, the depth of the concave is less than the thickness of the high-pressure channel plate, and the linear groove is along the first The length direction of the channel section is set, a plurality of first flow channels and second flow channels are adjacent and staggered, the third flow channel is an extension of the first flow channel, the width of the third flow channel is smaller than the width of the first flow channel, pre-cooling The segment is rectangular and has a concave S-shaped groove. The pre-cooling segment communicates with the second flow channel and does not communicate with the first flow channel.

Description

technical field [0001] The invention belongs to the field of throttling refrigeration, in particular to a two-stage rectangular micro-channel 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 pre-cool the incoming h...

AI Technical Summary

Problems solved by technology

However, the above-mentioned throttling refrigerator has low pressure bearing capacity, the inflow gas pressure is limited by the silicon material, and there is limited space for the cooling temperature to drop. At the same time, its structure cannot be stacked in multiple layers, resulting in a small air intake and low cooling capacity.

[0004] In addition, the current multi-layer multi-channel micro-channel throttling refrigerator has limited temperature drop and cannot meet the needs of deep low temperature

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