Getting to know Xiaomi’s new cooling technology called Loop LiquidCool

Getting to know Xiaomi’s new cooling technology called Loop LiquidCool

Getting to know Xiaomi’s new cooling technology called Loop LiquidCool Chipsets used in smartphones are faster every year They already do, but as the silicon nodes in the chips progress, it will be normal for them to heat up. This is why the use of cooling systems has become one of the most important factors in the production of smartphones, and the use of steam chambers (or heat pipes) is very common. Recently, we learned that the company Xiaomi has introduced a new technology called Loop LiquidCool invented that by improving the heat pipes, it can double the efficiency of the previous system. The first Xiaomi phones equipped with this system are expected to enter the market in the second half of 2022.

According to Xiaomi this The new technology is inspired by cooling solutions in the aerospace industry. Loop LiquidCool technology uses capillarity to draw the liquid coolant to the heat source, cause it to vaporize, and then effectively disperse the heat to the cooler part until the coolant condenses and passes through a one-way closed-loop channel. gets trapped Next, we explain the details of how this system works with the help of the following image:

When the workload of the smartphone is high and the chipset heats up, the heat of the chipset causes the liquid to evaporate (the part called Evaporator in the picture) specified). This hot steam moves down in the pipe and cools down in the condenser section and turns into a liquid again. Next, this liquid is absorbed and collected by the fine filaments in a chamber called Refill and the required liquid is supplied to the Evaporator section. In this way, the cycle starts again.

This process is similar to what happens in conventional heat pipes, but as already mentioned, the new technology Xiaomi has been developed with some fundamental changes in the previous systems. The first point is that in Loop LiquidCool, hot vapor and cool liquid are kept separately. Meanwhile, in the heat pipe system, the liquid carrier duct and the chamber to which the steam is directed are all located in a metal pipe, and the contact between the two reduces the efficiency of the system. According to Xiaomi, the ring-shaped pump of this new system is designed in such a way that the air resistance is reduced by 30% and the maximum heat transfer capacity increases by 100%.

Another major change is to use Tesla valves ( Tesla Valves) is related. The purpose of placing these one-way valves is to ensure the correct flow of the cycle. As their name suggests, these valves were created by the famous scientist of the 19th and 20th century Nikola Tesla are built and have no moving parts. But their clever design makes it easier to move the liquid in one direction. Also, the existence of these valves makes it possible to implement Loop LiquidCool technology in different designs. For example, according to Xiaomi, if the circuit is designed in a square shape, the manufacturer will have more space to put the battery or camera module in the phone.

That said, the new cooling technology mechanism Xiaomi was on paper. But in order to have a better understanding of this system, Xiaomi manipulated a model of the smartphone Mix 4 has replaced the vapor chamber cooling system of this phone with the new Loop LiquidCool technology. The manufacturing company has designed an experiment to evaluate this new cooling system.

In this test, to increase the temperature of the said phone, the relatively heavy game Genshin Impact is installed on it and the video settings are set to 60 frames per second ( the highest limit) was placed. After 30 minutes of gameplay, the maximum recorded temperature was reported to be 47.7 degrees Celsius, which is about 8.6 degrees cooler than the maximum temperature achieved by the original Mix 4.

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