Regenerative throttling assembly, combined microchannel throttling refrigerator and device

Abstract

The invention relates to a regenerative throttling assembly, a combined microchannel throttling refrigerator and a device. The refrigerator is the overlaid chute-shaped and wave-shaped combined microchannel throttling refrigerator and is formed by staggeredly overlaying multiple chute-shaped and wave-shaped regenerative throttling components; each regenerative throttling component comprises a regenerative throttling upper plate and a regenerative throttling lower plate overlaid up and down; the regenerative throttling upper plates and the regenerative throttling lower plates comprise inlet sections, regenerative throttling sections and expansion sections connected sequentially; multiple line grooves in parallel are arranged on the regenerative throttling upper plates; multiple W-shaped fold line grooves in parallel are arranged on the regenerative throttling lower plates; the line grooves on the regenerative throttling upper plates and the fold line grooves on the regenerative throttling lower plates are staggered and communicate at the staggered part; the expansion sections communicate with the inlet sections through the regenerative throttling sections so as to form multiple regenerative throttling channels; and a working medium forms a mesh-shaped whirl mesh flow when flowing in the channels, so that the disturbance is improved, and the heat exchange efficiency between platesheets and the working medium is improved.

Description

technical field [0001] The invention belongs to the field of enhanced heat exchange, and in particular relates to a stacked chute-shaped and wave-shaped combined microchannel throttling refrigerator and a device. 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 incoming high-pressure gas. However, the Hampson-type throttling refrigerator has only ...

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.

Images