Low-temperature refrigerator with large-plane uniform-temperature cooling platform

Abstract

The invention provides a low-temperature refrigerator with a large-plane uniform-temperature cold platform, and relates to the technical field of low-temperature refrigeration, the low-temperature refrigerator comprises a cold plate, a cold finger and a hot end, a cavity structure is arranged in the cold plate connected between a heat dissipation device and the cold finger, heat conduction ribs are arranged in the cavity structure, and the cavity structure is connected with a first side plate and a second side plate; one end of the cold finger away from the second side plate is connected with the hot end. The heat conduction ribs at different positions can correspondingly generate different deformations according to the temperature distribution state, so that the deformation of the cold plate is reduced, and the good contact between the refrigeration plane and the heat dissipation device is ensured; in addition, the cavity structure is filled with the working medium, so that the heat conduction performance of the cavity structure can be improved; according to the cold platform, deformation generated in the refrigeration process of the cold platform can be reduced, the heat transfer effect and the temperature uniformity of the cold plate can be guaranteed, the mass of the cold plate can be reduced, the requirement for the strength of the supporting structure is lowered, the supporting structure with the smaller sectional area can be adopted, and then the cooling capacity loss of the supporting structure is effectively reduced.

Description

technical field [0001] The present disclosure relates to the technical field of low-temperature refrigeration, in particular to a low-temperature refrigerator with a large-plane temperature-equalizing cooling platform. Background technique [0002] In the fields of aerospace, superconductivity, electronics, etc., many heat dissipation devices need to be able to work normally in a low temperature environment, so it is necessary to use a cryogenic refrigerator to cool these heat dissipation devices. The heat dissipation of the heat dissipation device is gradually increasing, and the size of the heat dissipation plane is also gradually increasing, so the size of the cooling plane coupled with it is required to be continuously increased. Therefore, higher requirements are put forward for low-temperature refrigeration equipment, not only the temperature uniformity requirements of heat dissipation devices and the efficient transmission of cold capacity of low-temperature refrigera...

AI Technical Summary

Problems solved by technology

On the one hand, as the area of ​​the large plate increases, the temperature gradient of the entire cooling plane increases, and the influence of thermal stress after the room temperature drops to a low temperature increases, and the deformation of the plate after being subjected to thermal stress affects heat transfer, and even causes damage to the cooled device

On the other hand, in order to meet the temperature uniformity requirements, the plate needs to be designed thicker, and at the same time, in order to meet the vibration requirements, the support structure design of the plate must be strengthened, which will further increase the cooling capacity loss of the cryogenic refrigerator

[0004] Therefore, the current low-temperature refrigerators with large cooling planes have problems such as poor temperature uniformity of large planes, severe deformation due to thermal stress, and large loss of cooling capacity of supporting structures.

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