Heat dissipation device with three-dimensional pulsation heat pipes

Abstract

The invention discloses a heat dissipation device with three-dimensional pulsation heat pipes. The heat dissipation device comprises an evaporation unit, a condensation unit, and a heat insulation unit, wherein a plurality of evaporation pulsation heat pipes and a plurality of condensation pulsation heat pipes are arranged in a plane; one end of each evaporation pulsation heat pipe communicates with one end of the corresponding condensation pulsation heat pipe through a first elbow, and the other end of each evaporation pulsation heat pipe communicates with the other end of the corresponding condensation pulsation heat pipe through a second elbow; and the plurality of evaporation pulsation heat pipes communicate with the plurality of condensation pulsation heat pipes through the pluralityof first elbows and the plurality of second elbows to form a closed-loop passage. According to the heat dissipation device with the three-dimensional pulsation heat pipes, on the basis of existing two-dimensional heat pipes, an evaporation section and a condensation section are arranged on two parallel planes which are parallel to each other, the evaporation section and the condensation section are connected through the elbows to form the closed loop, and the burning-dry phenomenon caused by excessive quantity of the elbows of a traditional heat pipe evaporation section is avoided; and a flat-plate structure can be well connected with a heat source, unnecessary heat resistance is avoided, and heat exchange performance is improved.

Description

technical field [0001] The invention belongs to the field of heat dissipation of electronic equipment, and in particular relates to a heat dissipation device with a three-dimensional pulsating heat pipe. Background technique [0002] The pulsating heat pipe (also known as the oscillating heat pipe) is a new type of heat pipe proposed by the Japanese scholar Akachi in the early 1990s. It can be formed by bending a capillary in a serpentine shape. It has a simple structure and does not require a liquid-absorbing core. As a typical representative of the new heat pipe technology in recent years, the pulsating heat pipe not only inherits the characteristics of the traditional heat pipe, such as simplicity, reliability, low price, and no power consumption, but also overcomes its limitations such as portability and boiling. The disadvantage of low thermal limit has the advantages of fast thermal response, outstanding heat transfer capacity and strong environmental adaptability. It ...

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Problems solved by technology

[0004] However, most of the pulsating heat pipes currently used for electronic cooling are two-dimensional or flat-shaped pulsating heat pipes, which limits the relative positions of the heat source and the heat sink, and heat can only be transferred from one side of the heat pipe to the other; Secondly, there are a certain number of elbows in the evaporation section of most pulsating heat pipes. When the heating power increases to a certain level, it is easy to burn out and affect the performance of the pulsating heat pipe.

[0005] In addition, there are certain deficiencies in the traditional way of connecting the heat source of the heat pipe to the evaporation section. In the prior art, such as figure 1 The shown pulsating heat pipe is directly connected to a section of horizontal pipe from head to tail in order to realize closed-loop circulation and liquid filling, and the inlet and outlet are connected with a horizontal pipe and a one-way valve to form a closed loop

At the same time, incomplete condensation will also occur in the condensation section, which will cause the working fluid to return to the evaporation section and appear dry.

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