Anti-gravity loop heat pipe and production method thereof

Abstract

The invention discloses an anti-gravity loop heat pipe. The anti-gravity loop heat pipe comprises an evaporation segment, an insulating segment, a condensation segment and a liquid conveying segment, which are connected end to end to form a loop. The liquid conveying segment comprises at least one capillary tube, and two ends of every capillary tube are connected with the evaporation segment and the condensation segment respectively; the inner diameter of the capillary tubes is smaller than that of the pipe body of the evaporation segment and the pipe body of the condensation segment; a liquid-absorbing core passage is formed in the evaporation segment. The anti-gravity loop heat pipe drives liquid working medium to quickly move in the pipe by capillary force, has fine return speed stability and higher heat transfer efficiency, and is applicable to the complex fields having high radiating condition requirements, such as aerospace, photoelectrons, chemical industry and power engineering. The invention further provides a production method of the anti-gravity loop heat pipe.

Description

technical field [0001] The invention relates to heat transfer equipment technology, in particular to an anti-gravity loop heat pipe and a manufacturing method thereof. Background technique [0002] Thermal control has always been a key consideration in the design of electronic instrument components, because electronic instruments operate better within a certain temperature range. However, with the advancement of industrial design densification and miniaturization, the trend of smallest functional devices, stronger functions, and faster processors has led to a constant increase in the heat dissipation per unit area of ​​the system, especially with increasingly dense high-heat flux components. The multi-chip module was born. This means that various thermal resistances from the internal heat source to the external heat sink must be reduced, and new requirements are placed on heat transfer and heat dissipation technologies. [0003] The traditional loop heat pipe radiator show...

AI Technical Summary

Problems solved by technology

However, for the traditional loop heat pipe radiator, the distribution of temperature is changed according to the location of the heat source, when the distance from the heat source increases, so the traditional loop heat pipe radiator has poor heat transfer efficiency due to the loop heat pipe, resulting in low cooling efficiency

At the same time, as the distance increases, the heat transfer performance of the traditional loop heat pipe is also greatly limited. The return velocity of the working medium is unstable, the temperature fluctuates greatly, and it is difficult to ensure that the temperature control is within the specified working range.

Especially under anti-gravity conditions, the heat transfer capacity is greatly reduced, and even low power failures may occur

Under anti-gravity conditions, due to the influence of gravity, the burden of the return flow of the working medium of the loop heat pipe is greatly increased, resulting in unstable return flow of the working medium

The unstable circulation velocity of the working medium will lead to fluctuations in the temperature of the heat source, especially when the heat sink is far away from the heat source or the temperature of the heat source is not working under the target load of the loop heat pipe design, it will inevitably lead to severe fluctuations in the temperature of the heat source

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