Gravity heat pipe based on dual-power drive enhanced heat transfer

Abstract

The invention discloses a gravity heat pipe based on dual-power drive enhanced heat transfer. The gravity heat pipe comprises an evaporation section and a condensation section, wherein a heat insulation section is arranged between the evaporation section and the condensation section; the evaporation section is filled with a liquid working medium, the liquid working medium absorbs heat and evaporates in the evaporation section to produce bubbles, the bubbles release heat and are condensed to form liquid drops after entering the condensation section, and the liquid drops return to the evaporation section through gravity; and a self-driven reciprocating motion module is arranged in the gravity assisted heat pipe and realizes full-coverage reciprocating automatic liquid scraping in the condensation section under the dual-power driven of the bubbles and the liquid drops. By using the gravity heat pipe, through the falling impact effect of condensate liquid drops and the buoyancy effect of rising bubbles produced by boiling, springs are driven by double power to deform and oscillate, a hollow table body is further driven to move, and the disturbance effect of a working medium in the evaporation section is enhanced; and in addition, by arranging liquid drainage rings in a segmented mode, segmented liquid scraping of the condensation section can be achieved, and therefore full-coverage liquid scraping of the condensation section is achieved.

Description

technical field [0001] The disclosure belongs to the technical field of heat pipes, and in particular relates to a gravity heat pipe based on dual power drives to enhance heat transfer. Background technique [0002] Gravity heat pipe is an efficient heat transfer element, which is widely used in waste heat recovery, heat dissipation of electronic equipment and other fields. It is generally composed of three parts: evaporation section, adiabatic section and condensation section, and the condensation section is located on the upper part of the evaporation section. The working principle is as follows: The continuous phase change process of the internal working fluid is used to absorb and release the latent heat of vaporization, and return to the evaporation section under the action of gravity, so that the heat is transferred from the evaporation section to the condensation section in a cycle. [0003] At present, the heat transfer of heat pipes is mainly enhanced through the tr...

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Problems solved by technology

However, there are three unreasonable points in this technology: First, the design and layout of the lifting box and the return plate are unreasonable. The lifting box only has an opening at the top and the return plate is a square thin plate. The cross-sectional area of ​​the two almost reaches the cross-sectional area of ​​the steam ascending channel. 60%-80% of the condensing section of the steam will be greatly hindered, thereby hindering the gas-liquid circulation inside the heat pipe, which directly leads to a significant decrease in the heat transfer performance of the heat pipe; secondly, the two types of return plates are arranged alternately, but The second reflux plate is lower than the first reflux plate, resulting in a scraping blind area during the movement of the second reflux plate, resulting in uneven heat transfer in the condensation section; finally, after the gravity of the condensing working medium and the spring force reach dynamic stability, the first reflux plate The actual scraping distance from the second reflux plate is limited, and it is impossible to scrape off the liquid film with full coverage on the inner wall of the condensation section

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