Array cylindrical group type multi-stage lamination micro-channel throttling heat exchange refrigerator

Abstract

The invention discloses an array cylindrical group type multi-stage lamination micro-channel throttling heat exchange refrigerator. The refrigerator comprises an upper cover plate, multiple upper sheets, multiple lower sheets, and a lower cover plate, wherein the upper cover plate, the upper sheets, the lower sheets and the lower cover plate are overlapped in sequence; each upper sheet comprises achannel segment, and each channel segment comprises a first runner, a second runner, a third runner and a fourth runner; the first runners, the second runners, the third runners and the fourth runners are provided with inwards-concave S channels arranged in the length direction of the channel segments, multiple protruding cylindrical needle ribs are arranged in the first runners, the third runners and the fourth runners, the density of the cylindrical needle ribs in the fourth runners is larger than that of the cylindrical needle ribs in the third runners, the density of the cylindrical needle ribs in the third runners is larger than that of the cylindrical needle ribs in the first runners, the first runners are adjacent to the second runners, lengths, along the channel segments, of the first runners and lengths, along the channel segments, of the second runners are same, one ends of the third runners are in communication with the first runners, the other ends of the third runners communicate with the fourth runners, one ends of the fourth runners communicate with the third runners, and the other ends of the fourth runners communicate with evaporation cavities.

Description

technical field [0001] The invention belongs to the field of enhanced heat exchange throttling refrigeration, and in particular relates to an array column group type multi-stage laminated microchannel throttling heat exchange refrigerator formed by microchannel two-stage throttling precooling. Background technique [0002] Miniature throttling refrigerators use the Joule-Thomson effect (J-T effect) for refrigeration, and are widely used in occasions with small size and space, such as inner cavity cryotherapy, infrared night vision devices, etc. At present, the main J-T effect refrigerator still adopts the 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 incomi...

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.

In addition, the existing micro-channel refrigerator is a single-stage heat recovery, throttling refrigeration, using a refrigerant, the final cooling temperature is limited

[0004] In summary, the existing micro-channel throttling refrigerators have small air intake, low heat transfer efficiency, and limited cold-end temperature, which restricts the application and development of micro-channel throttling refrigerators.

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