Adjustable heat transfer area ratio heat pipe

Abstract

The invention provides a heat pipe for adjusting the heat exchange area ratio and particularly relates to the heat pipe which comprises a shell, an auxiliary liquid absorption core, a circulating heat exchange pipe and a heat pipe work medium. When the temperature of the evaporation segment of the heat pipe is increased to exceed the design value, the inner surface of the circulating heat exchange pipe participates in heat exchange, the condensation speed of the work medium of the heat pipe is increased so that the condensed heat pipe work medium liquid can meet the requirement for the evaporation amount, the accident of heat pipe failure caused by drying-up of a liquid absorption core of the evaporation segment is avoided, and it is guaranteed that the heat pipe can operate safely when the temperature of thermal fluid is fluctuated. When the temperature of the evaporation segment of the heat pipe is lower than the design value, the inner surface of the circulating heat exchange pipe does not participate in heat exchange, and the heat pipe recovers normal operation.

Description

technical field [0001] The invention relates to an adjustable heat exchange area ratio heat pipe, which relates to a heat pipe, in particular to an adjustable heat exchange area ratio heat pipe which adopts a circulating heat exchange pipe to increase the heat exchange area of ​​a condensing section. Background technique [0002] The heat pipe is composed of a tube shell, a liquid-absorbing core and a heat pipe working medium. The working section of the heat pipe is divided into three parts: the evaporation section, the adiabatic section and the condensation section. When the evaporating section absorbs the heat of the hot fluid, the heat passes through the shell to evaporate the working medium of the heat pipe soaked in the liquid-absorbing core, and the steam of the working medium of the heat pipe flows to the condensing section under the action of the pressure difference formed between the evaporating section and the condensing section, and the cold fluid The shell absorb...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcoming that when the temperature fluctuation of the thermal fluid causes the temperature of the evaporation section of the heat pipe to be higher than the design temperature, the ordinary heat pipe is prone to capillary limit and boiling limit, which will cause the temperature of the heat pipe shell to rise sharply, and even burn the heat pipe. When the temperature of the evaporating section of the heat pipe increases, the heat exchange area of ​​the condensing section of the heat pipe can be increased, that is, the ratio of the total heat exchange area of ​​the condensing section of the heat pipe to the total heat exchange area of ​​the evaporating section of the heat pipe can be increased, the condensation speed of the working medium of the heat pipe can be accelerated, and the condensed heat pipe can be accelerated. The working medium liquid can meet the evaporation capacity, and avoid heat pipe failure accidents due to the dryness of the liquid absorption core in the evaporation section. Adjust the heat transfer area ratio heat pipe

Images