Heat pump type circulation heat pipe radiator

Abstract

The invention relates to a heat pump type circulation heat pipe radiator for emitting the heat of an integrated LED (Light-Emitting Diode) chip, which is characterized by being formed by welding and assembling a circulation heat pipe, a lamp shell, a working medium pump and radiating fins as elements; the head end of an evaporation zone of the radiator and the tail end of a condensation zone of the radiator are communicated by a throttle valve or a throttle pipe or communicated with the throttle pipe through the working medium pump to form a sealed circulation heat pipeline; the heat emitted from the LED chip is utilized to make a working medium boiled so as to form an evaporation high-pressure section; along with exchanging heat with the environment, a condensation low-pressure section is formed at the tail end of the circulation heat pipe, wherein the working medium generates phase change and pressure difference by utilizing the heat to push the working medium to circulate in one way in the circulation heat pipe; the heat exchange area is enlarged by utilizing the external space of the lamp shell; and the four elements are assembled into various types of radiators. The radiator is especially applicable to LED chips with high heat-flow density and high power, does not need a fan, ensures the low temperature rise of a node and takes the positive actions on energy saving and environment beautifying.

Description

Technical field [0001] The invention relates to a cooling device for distributing the heat of an integrated LED (Light Emitting Diode, English abbreviation for light-emitting diode) chip, especially a heat dissipation device capable of dissipating its high heat flux density and high-power heat without a fan, so as to keep the nodes of the LED chip at a uniform temperature rise Heat pump type circulating heat pipe radiator. Background technique [0002] At present, the heat sink used to dissipate the heat of highly integrated high-power LED chips is a well-known representative heat pipe radiator. Its working principle is: in the heat-receiving section of the heat pipe, the working fluid in it receives heat and boils and evaporates, and carries the heat to the condensation section. Exchange heat with the tube wall, the working fluid condenses and is absorbed by the siphon in the liquid-absorbing core, and flows back to the heating section by gravity and siphon force, forming a...

AI Technical Summary

Problems solved by technology

[0002] At present, the heat sink used to dissipate the heat of highly integrated high-power LED chips is a well-known representative heat pipe radiator. Its working principle is: in the heat-receiving section of the heat pipe, the working fluid in it receives heat and boils and evaporates, and carries the heat to the condensation section. Exchange heat with the tube wall, the working fluid condenses and is absorbed by the siphon in the liquid-absorbing core, and flows back to the heating section by gravity and siphon force, forming a circulation of the working fluid and completing the heat dissipation process. A typical heat pipe is between the heating section and the condensation section. The constant temperature section, the constant temperature pipe section is used vertically and horizontally, it can be longer, the heat transfer speed is fast, but it cannot be bent, if the bend is more than 90°, if there is a horizontal distance, this section cannot use gravity, only relying on siphon force, the working fluid in the siphon channel is prone to If there is less flow or no flow, if there is not enough working fluid in the heating section, the evaporation of the working medium will be insufficient, and if the reflux working medium cannot be obtained, dry burning without evaporation will occur, and the heat transfer capacity will drop sharply, or even lose. , the existing LED heat pipe radiator must be bent at 90° to be used, and there is a horizontal section, which leads to the limitation of the total length of the heat pipe, which cannot use a wide space, and can only conduct heat exchange nearby. In order to increase the condensation speed, a fan has to be used to blow the cooling fins. In order to prevent the low flow and cut-off of the working fluid, once the fan is damaged, the condensation of the working fluid is insufficient or the temperature of the LED chip junction is ≥80°C, the LED lighting quality will be greatly weakened and the chip will be burned.

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