Dual-cooling-head slit-cooling coaxial neamal tube refrigerating machine

Abstract

The invention relates to double fixed junctions slit cooling finger coaxial vessel refrigerating machine. It belongs to refrigeration technical field. Line form compressor is connected to the hot end of the hold over. The cooling end of the vessel is formed a slit type cooling finger. Its bottom and out wall are set groove. The edge of the cooling end cover and the out wall of the hold over are welded. The invention simplifies cooling end structure, enhance heat transfer capability. Thus the performance of the coaxial vessel refrigerating machine is increased further.

Description

technical field [0001] The invention relates to a device in the technical field of refrigeration, in particular to a double cold head slit cold finger coaxial pulse tube refrigerator. Background technique [0002] The pulse tube refrigerator uses high and low pressure gas to charge and deflate the cavity of the pulse tube to obtain the cooling effect. According to the position of cold storage and pulse tube in the pulse tube refrigerator, it can be divided into coaxial type, U type and coupling type. From a structural point of view, for the optimized coaxial arrangement of pulse tube refrigerators, they are more compact and small in size and have attracted widespread attention. People have been improving the structure of the pulse tube refrigerator to further improve its performance. Among them, because the coaxial pulse tube refrigerator is coaxially arranged with the pulse tube and the regenerator, the heat conduction loss of the wall surface of the pulse tube is reduced...

AI Technical Summary

Problems solved by technology

However, the thermal insulation layer structure added by this patent leads to an increase in the radial dimension of the coaxial vessel on the one hand, and on the other hand requires high compatibility between the thermal insulation layer and the vessel wall (to prevent the gas from directly flowing from the thermal insulation layer and the vessel wall. In and out between the vessel walls), and for the structure of the cold-end heat exchanger, the gas directly turns 180 degrees into the vessel after passing through the heat exchanger, which is easy to cause vortices, which greatly affects the laminarization of the gas, and further Affects the performance of the refrigerator, and the current structure of the cold end heat exchanger is relatively complicated

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