How to DIY notebook computer cooling

The heat dissipation of notebook has been criticized by people, but also the primary problem of restricting notebook development. The source of the notebook has a lamp, hard disk, memory, graphics card, but the largest source of heat is generally the CPU. Although the notebook has done a lot of work on the heat dissipation of the CPU, there is no way to satisfy the people. Smart DIYer will use their own methods to solve the problem of laptop heat dissipation, to give the notebook adequate cooling also has a certain degree of knowledge.

Notebook CPU heat dissipation principle:

CPU heat dissipation of the main use of aluminum plate cooling structure plus exhaust fan mode, of course, the aluminum plate may also be embedded with heat conduction medium copper tube, used to speed up the CPU heat transfer speed, in the aluminum plate below also equipped with small exhaust fan, the aluminum plate around the hot air blown out. In addition, most laptops use a shell or a keyboard with an aluminum backplane as an auxiliary cooling device.

The principle of thermal control of notebook computer such as: monitoring the temperature of the CPU through the temperature sensor, when the temperature reaches the critical value, the cooling fan starts, through the heat conduction aluminum plate one-way cavity, will the hot air blow out, through the forced circulation wind, will the temperature reduce. When the temperature sensor monitors the CPU temperature down below the critical value, the fan stops, and as long as the system is running, the cycle process is ongoing. According to this principle, if the aluminum sheet thermal efficiency is high enough to completely emit the heat from the CPU, so that the temperature sensor to monitor the temperature values below the set threshold, the fan will not start. If the number of fan startup is greatly reduced, the noise will be greatly reduced, which will not only prolong the fan life, but also reduce the possibility of system failure.

Notebook Cooling Fan DIY:

The first step: first with a small screwdriver to withstand the top of the keyboard clamp, the keyboard gently lift.

At this point can see the whole machine cooling part, pressure on the CPU of a cast aluminum plate, which has a curved compressed copper tube, glued embedded in the aluminum plate groove, one end on the CPU, the other end extends to the most outer end of the heat sink. According to the author's testing and use, found that the design of the factory to improve the effect of heat dissipation is very small, because when the heat accumulation to a certain extent, the heat pipe and aluminum plate temperature is the same, can not form a large temperature difference. The fan does not reduce the number of times it is opened.

The second step: according to the Heat sink on the text label, the fixed screws in the order of 1-3-2-4 to remove. This is done to prevent the edge of the CPU from being crushed by uneven pressure.

Take care to lift the heatsink, and note that the power plug for the cooling fan on the board and the motherboard is unplugged. At this point, you can see a soft, pewter-like sheet of metal in the underside of the heatsink that touches the CPU. According to the test, the author found that this thin slice is superfluous, not only can not increase the tightness of contact, but also may increase the heat dissipation of the difficulty, so the author removed this slice, to apply the graphite powder of silica gel, Reduces the likelihood of producing gaps.

The third step: drill on the surface of the heat-cooled aluminum plate drilling some diameter 5mm, depth 3mm about Keng.

Drill diameter can be selected to smaller, preferably with a fixture fixed aluminum plate, but the attention can not drill through! Preferably in the upper and lower surface of the aluminum plate drilled such a dense row of Keng, through the calculation, the entire aluminum plate heat dissipation area at least increased 60%~68%, and will not affect the mechanical strength and heat capacity of the aluminum plate. Finally remove burrs and debris, the heat sink plate installed, pay attention to the thermal silica gel.

The fourth step: replace the black sponge behind the keyboard, put on copper or aluminum.

Remove the black sticker sponge behind the keyboard, find a thin piece of aluminum or copper, pay attention to the thickness of the keyboard is the best behind the black sponge, the area is best to cover the cooling aluminum plate is appropriate, if there is uneven place the best leveling, it is possible to contact the electronic components of the place can be affixed with transparent self-adhesive, to prevent short-circuit.

Fifth Step: Finally the keyboard carefully installed, boot test. At room temperature 31 ℃, the continuous boot 24 hours, open more than one work window work at the same time, the machine about 2 hours before starting the fan, lasts about 3 minutes, the fan is stopped, compared with the previous, the fan start frequency greatly reduced, and after the start-up operation time is greatly shortened. Thus, in the premise of not changing the original basic heat dissipation structure, through a variety of ways to deal with, expand the heat dissipation area, so that the heat distribution speed greatly accelerated, bringing the effect is very obvious.