Regenerative throttling plate, assembly, w-shaped micro-channel throttling refrigerator and refrigeration device

Abstract

According to the regenerative throttling plate, assembly, W-shaped micro-channel throttling refrigerator and refrigeration device of the present invention, the W-shaped micro-channel throttling refrigerator is formed by a plurality of W-shaped regenerative throttling assemblies interlaced, and the W-shaped throttling The heat throttling assembly includes two regenerative throttle plates stacked up and down. The regenerative throttle plate includes an inlet section, a channel section and an expansion section connected in sequence. There are multiple W-shaped folding line grooves arranged in parallel on the channel section. The W-shaped folding line grooves on the two regenerative throttle plates are interlaced and connected at the intersection to form a regenerative throttle channel. The W-shaped corrugations in the two plates are inverted to form a mesh contact, and the working fluid flows in the channel. In the middle, a mesh swirling flow will be formed, which can enhance the heat exchange efficiency between the plate and the working fluid.

Description

technical field [0001] The invention belongs to the field of enhanced heat exchange, and in particular relates to a recuperation throttling plate, a recuperation throttling assembly, a throttling refrigerator and a refrigeration device. 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 throttl...

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

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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