Visual experiment device for researching critical heat flux density of ultra-thin vapor chamber

Abstract

The invention relates to a visual experiment device for researching critical heat flux density of an ultra-thin vapor chamber. The device comprises an annular side plate, a sample is connected to thelower end of the side plate, the sample and the side plate are semi-enclosed to form a working medium accommodating cavity, a first transparent heat insulation plate is detachably connected to the upper part of the side plate, a liquid adding hole communicated with the working medium accommodating cavity is formed in the upper end of the first transparent heat insulation plate, the lower end of the first transparent heat insulation plate abuts against the upper end of the sample, a gap between the first transparent heat insulation plate and the sample forms a working medium flow channel, the distance between the first transparent heat insulation plate and the sample can be adjusted, and the sample is provided with a heating device and a temperature sensing device. The gas-liquid change condition of the working medium in working medium flow channels with different sizes can be observed, and more experiment requirements are met. By controlling parameters such as working medium temperature, heating heat flow and a working medium flow channel, research on convective heat transfer and bubble dynamic characteristics of supercritical pressure fluid in the working medium flow channel underthe multi-boundary condition coupling effect is achieved.

Description

technical field [0001] The invention relates to the field of ultra-thin vapor chambers, in particular to a visualization experiment device for researching the critical heat flux of ultra-thin vapor chambers. Background technique [0002] The critical heat flux is the heat transfer limit of flow boiling, and it is of great significance to accurately predict the critical heat flux value for the design of the vapor chamber. Ultra-thin vapor chambers are widely used in electronic products that require small volume or rapid heat dissipation due to their advantages such as compact structure, good temperature uniformity, and large heat transfer area. [0003] Some empirical relational formulas for predicting critical heat flux in vapor chambers are obtained by fitting based on their own experimental data. The accuracy strongly depends on the similarity of the experimental working conditions and cannot be extended to other working conditions. Therefore, the direction of research is...

AI Technical Summary

Problems solved by technology

Although this structural design can visually observe the growth of bubbles from the side, the gap between the two insulation plates in this device cannot be adjusted, and the adaptability is not strong, so it is impossible to study the influence of the gap effect on the flow

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