Self-adaptive liquid accumulator with vapor bubble injection function

Abstract

The invention discloses a self-adaptive liquid accumulator with the vapor bubble injection function, applied to a vapor-liquid two-phase fluid circulation cooling loop. The liquid accumulator is a pressure vessel, at least two pipelines penetrate through the inside of the vessel, one pipeline is thicker, one end of the pipeline is connected with an outlet of an evaporator, the other end of the pipeline is connected with a heat side inlet of a condenser, the thinner pipeline is at least provided with a small opening in the vessel, the small opening has a certain height with the bottom of the vessel, or extends to a position with a certain height in the vessel through another small pipeline, one end of the pipeline in the vessel is connected with an outlet of a pump, and the other end of the pipeline in the vessel is connected with an inlet of the evaporator. Under the condition that the saturated liquid flows in the pipelines, the liquid accumulator can inject vapor bubbles to the pipelines through the opening of the pipeline penetrating through the inside of the liquid accumulator. The liquid accumulator can efficiently eliminate the common phenomenon of overheating in the hot start process of a two-phase circulation cooling system, enable the loop system to stably start, and can also self-adaptively regulate a working point according to the heat emission quantity when the loop system works, thereby reaching the purpose of more energy saving.

Description

technical field [0001] The invention relates to a liquid storage device, in particular to an adaptive liquid storage device with bubble injection function applied to a two-phase loop heat dissipation system. Background technique [0002] Mechanical pump drive (hereinafter referred to as pump drive) two-phase loop cooling system has the advantages of high heat dissipation efficiency, good temperature uniformity, high stability, and is especially suitable for dispersing heat source heat dissipation and long-distance heat dissipation. Thermal management fields such as detection and data center cooling have huge applications and market potential. [0003] For example, Chinese Patent Application No. 200810198088 discloses a two-phase loop heat dissipation system driven by waste heat, which is suitable for heat dissipation of electronic equipment with high heat flux density in closed equipment cabins such as computer rooms, aircraft, and ships. In this two-phase loop heat dissipa...

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Problems solved by technology

[0008] For the application of the two-phase loop heat dissipation system in the heat dissipation of electronic equipment, another challenge is the overheating problem that often occurs during hot start, that is, when the thermal load of the electronic equipment is turned on, the working fluid needs to go from liquid to vapor-liquid Two-phase transformation, since the liquid-vapor phase transformation is a first-order phase transformation, the phase transformation often occurs after the temperature is higher than the saturation temperature (the difference is called superheat), and the superheat sometimes exceeds 20°C, and then In addition, the heat transfer coefficient of liquid is much lower than that of two-phase flow boiling heat transfer. Therefore, when the heating electronic equipment is started, the temperature may be too high; Cause pressure pulses, which will have a negative impact on the system and its components. Overheating is a phenomenon that system designers do not want to see or need to eliminate; moreover, the "bumping" of superheated liquid will cause pressure shocks on the system and even cause cause system instability and damage

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