Composite cooling device and equipment with zigzag microchannel throttling refrigerator

Abstract

The invention discloses a combined cooling device with a saw tooth-shaped micro-channel throttling refrigerator and equipment. The combined cooling device comprises the saw tooth-shaped micro-channelthrottling refrigerator and a vibration heat pipe segment, the saw tooth-shaped micro-channel throttling refrigerator is formed by staggering and overlapping multiple saw tooth-shaped backheating throttling assemblies, each saw tooth-shaped backheating throttling assembly comprises two backheating throttling plates which are overlapped vertically, the backheating throttling plates comprise inlet segments, channel segments and expansion segments, multiple saw tooth-shaped fold line grooves are formed in the channel segments in parallel, the saw tooth-shaped fold line grooves in every two backheating throttling plates are staggered and communicated at staggering positions to form a backheating throttling channel, the saw tooth-shaped fold line grooves in every two plates are staggered to form net-shaped contact points, working media will form net-shaped rotary net flows when flowing in the channels, and the heat exchange efficiency of the plates and the working media can be enhanced.

Description

technical field [0001] The invention belongs to the field of enhanced heat exchange, and in particular relates to a composite cooling device with a zigzag microchannel throttling refrigerator. Background technique [0002] Miniature throttling refrigerators use the Joule-Thomson effect (J-T effect) for refrigeration. Because of their simple structure, small size, and rapid cooling, they are widely used in occasions with small space sizes, such as cryotherapy in the inner cavity, Infrared night vision devices, cryosurgical probes, missile guidance systems, electronic equipment cooling and other medical, military, industrial and other fields. 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-...

AI Technical Summary

Problems solved by technology

However, the Hampson-type throttling refrigerator has only one or two air intake channels, and the cooling capacity is small, and the central support shaft occupies a large space inside the refrigerator. The refrigerator structure is not compact and the heat transfer efficiency is low.

[0003] With the development of micro-channel technology, micro-channel throttling refrigerators have been widely researched and applied. In order to ensure the processing accuracy of micro-channels, they are generally made of non-metallic materials such as glass and silicon. However, micro-channel throttling refrigerators made of the above materials The pressure bearing capacity of the device is low, the inflow gas pressure is limited by the material, and the cooling temperature drop space is limited; at the same time, the general microchannel is mostly a single-layer heat exchange structure, resulting in a small air intake and low cooling capacity; the existing Although the side wall of the rectangular microchannel effectively supports the plate, it increases the axial heat conduction of the channel wall, and the heat loss of the microchannel throttling refrigerator is high; Heat conduction, but its pressure bearing capacity is reduced, and there is still room for increased pressure drop in the channels of rectangular and cylindrical plates, so the temperature drop is not sufficient

[0004] In addition, the existing refrigerators mostly use the method of direct heat exchange between the cold end and the heat source that needs to be refrigerated, and the uniformity of heat exchange is poor.

[0005] In summary, the existing micro-channel throttling refrigerators have small air intake, low heat transfer efficiency, and limited pressure bearing capacity, which restrict the application and development of micro-channel throttling refrigerators.

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