Flooded copper-evaporating heat-exchanging pipe for electric refrigerator set

Abstract

A flooded copper evaporation heat-exchange tube for electric refrigerating units comprises a polish rod pant, a fins part and a transition part for connecting the polish rod with the fins part. Between the fins is formed a single vaporization chamber and in the position extending upward from the bottom of the single vaporization chamber are disposed fins, which divide the single vaporization chamber into at least two small cavities. Between the fins of the single vaporization chamber there is an evaporation fin mouth. Because of setting several small cavities, on the base walls of the small cavities is formed the refrigerant film easily and then evaporated, and the formed bubbles escape from the evaporation fin mouth.

Description

technical field [0001] The invention relates to an evaporation heat exchange tube, in particular to a flooded copper evaporation heat exchange tube used in an electric refrigeration unit. Background technique [0002] In recent years, the rapid development of refrigeration and air-conditioning technology has promoted the continuous updating of the manufacturing technology of the two devices. Efficiency, miniaturization, light weight and replacement of new refrigerants are still the main development directions of the two devices, and the design and technical application of the evaporation tubes for the two devices are also constantly updated and developed. There are several ways to improve the evaporation tube commonly used at present: 1) Increase the heat transfer area of ​​the surface, which is generally achieved by adding fins on the outer surface of the tube or directly processing fins on the outer surface of the tube, but adding fins on the outer surface Fins usually pr...

AI Technical Summary

Problems solved by technology

There are several ways to improve the evaporation tube commonly used at present: 1) Increase the surface heat transfer area, which is generally achieved by adding fins on the outer surface of the tube or directly processing fins on the outer surface of the tube, but adding fins on the outer surface Fins usually produce thermal resistance between the fins and the outer surface of the tube, and processing fins on the outer surface is often limited by the process and the size of the tube and cannot fully meet the heat dissipation requirements; The space formed by the bubble nuclei is easy to form bubbles in the above-mentioned space. The bubbles are driven by heat to become larger when they are close to the surface of the evaporation tube. Due to the effect of the surface tension of the liquid, the bubbles can only leave the surface when they are large enough to overcome the surface tension of the liquid. Some tube surfaces have a large space to promote the formation of bubble nuclei, and the volume required for the bubbles to overcome the liquid tension also needs to be large enough, so it is not conducive to quickly taking away the heat on the surface, and it is also not conducive to quickly leaving space for new bubbles Formation; 3) At present, the transition length of the incomplete fin between the smooth surface of the evaporator tube and the surface with fins is about 60 mm, and the greater the transition length of the incomplete fin, the more incomplete fins , the more detrimental to the improvement of condensation performance

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