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Miniature throttling refrigerator

A refrigerator and miniature technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of low yield, difficult and complex processing, achieve smooth welding surface, eliminate contact thermal resistance, and beautiful welding surface Effect

Active Publication Date: 2014-11-12
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These processes are relatively complicated, require high processing precision, and are easy to block microchannels during processing, which makes processing difficult and the yield rate is relatively low.
At present, China has not fully mastered the processing technology of MMR refrigerators

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Such as figure 1 , 2 , 3, 4, 5 and 6, the micro-throttle refrigerator of the present invention is a three-channel micro-throttle refrigerator, wherein the middle flow channel is a high-pressure flow channel A, and the flow channels on both sides are the first low-pressure flow channel B 1 and the second low-pressure runner B 2 ; The miniature throttling refrigerator is composed of an upper cover plate 1 and a lower cover plate 5, two heat exchange cores 2, a high-pressure flow channel side wall 3, a cold end head 6 and a hot end head 7; The core body 2 is an upper heat exchange core body and a lower heat exchange core body respectively, both of which are composed of a long flat plate base and upper fins and lower fins on the lower surface vertically fixed on the upper surface of the long flat plate base respectively. Composition; the upper ribs and the lower ribs are flaky fins or needle-like fins with the same height and uniform distribution; the flaky ribs are paral...

Embodiment 2

[0054] Such as Figure 7 , 8 , 9 and 10, the miniature throttling refrigerator of this embodiment 2 is a miniature throttling refrigerator of two flow channels, wherein one channel is a high-pressure flow channel, and the other flow channel is a low-pressure flow channel; The upper cover plate 1, the lower cover plate 5, the heat exchange core 2 and the cold end head 6; the heat exchange core 2 has a length of 150 mm and a width of 14.7 mm, and the upper fin 21 has a height of 3.0 mm and a width of 0.3 mm , the height of the lower fin is 2.5mm, the width is 0.3mm, the base thickness of the upper and lower fins is 0.5mm, and a depth of 30mm is processed on the upper and lower fins, which is the value of the height of the fin or is lower than the height of the fin. 10% to 20%, groove 8 with a width of 0.2mm, in which a longitudinal groove 8 with a depth of fin height and a width of 0.2mm is processed every 3mm within the distance of 30mm in front of the air inlet of the high an...

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Abstract

The invention discloses a miniature throttling refrigerator which is composed of an upper cover plate, a lower cover plate, a heat-exchange core body and a cold-end seal head. An upper rib sheet and a lower rib sheet are fixed on the two sides of a panel base of the heat-exchange core body; channels which are in disjunction distribution and vertical to the long side edges of the panel base are formed in the length direction of both the upper and lower rib sheets; the upper rib sheet is located in a lower groove of the upper cover plate; the lower rib sheet is located in an upper groove of the lower cover plate; a through hole and an air inlet are formed in the top part of one end of the upper cover plate while the other end is unsealed and provided with a throttling hole; a through hole and an air outlet are formed in the top part of one end of the lower cover plate while a throttling hole is formed in the other end thereof; the upper cover plate, the lower cover plate and the heat-exchange core body compose a throttling refrigeration body; the cold-end seal head is arranged on one end, at which the throttling hole is, of the throttling refrigeration body in a sleeved manner; a low-pressure passageway is formed between the upper cover plate and the upper rib sheet; a high-pressure passageway is formed between the lower cover plate and the lower rib sheet; a high-temperature and high-pressure fluid enters into the high-pressure passageway from the air inlet, is changed into a low-temperature and low-pressure fluid after passing through the throttling hole, then enters into the low-pressure passageway, and finally flows out of the air outlet. The miniature throttling refrigerator has big specific surface area and high heat exchange efficiency, can bear high-pressure operation and is easy for large-scale production.

Description

technical field [0001] The invention relates to a miniature throttling refrigerator in the cryogenic field. Background technique [0002] The micro throttling refrigerator in the cryogenic field is a refrigeration device with many characteristics such as simple structure, convenient use, small volume and mass, easy integration of electronic devices, no vibration of the cold head, low noise, and easy miniaturization. As a convenient and reliable cold source, it can be widely used in industrial and experimental research, such as: temperature test of infrared detector, cooling CCD array, cooling of infrared spectrometer specimen, scanning electron microscope specimen cooling, integrated circuit cooling and Temperature stability control, micro-cold pump, cryopreservation of biological tissue, freeze-drying and portable low-temperature treatment equipment, etc. At present, the miniature throttling refrigerator widely used in small and medium-sized and miniature low-temperature r...

Claims

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Application Information

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IPC IPC(8): F25B23/00F25B41/06F25B41/30
Inventor 公茂琼闫彪吴剑峰王昂
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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