CN203882259U - Immersed host oil cooling circulation and heat dissipation system - Google Patents

Abstract

The utility model relates to a submerged main engine oil cooling circulation heat dissipation system, which comprises a main engine box, a power supply installed in the main engine box, a hard disk, a main board and a heat dissipation component installed on the main machine box, and injecting into the main machine box accounts for 1/3 of the volume of the main machine box. 2-2/3 of the transformer oil, so that the power supply, main board and cooling components can be immersed in the transformer oil, and the circulation pump and heat exchanger are arranged outside the main box, so that the transformer oil forms a circulating and cooling circuit. This system uses the transformer oil to directly contact the electronic devices in the computer mainframe to cool down the electronic devices on the main board in all directions, thereby improving the heat dissipation efficiency of the whole machine. And it can intelligently adjust the speed of the fan on the heat exchanger, so that the electronic components on the main board can basically maintain a constant temperature state. Not only can it speed up the calculation speed of the computer, but also the transformer oil in the device can slow down the oxidation loss of the electronic components of the motherboard, prolong the service life of the computer, and achieve the purpose of energy saving in many ways.

Description

A Submerged Main Engine Oil Cooling Circulation Heat Dissipation System

technical field

The utility model belongs to the field of heat dissipation, and relates to the heat dissipation of a computer mainframe, in particular to a submerged mainframe oil cooling cycle heat dissipation system.

Background technique

At present, the development trend of computer electronic components is towards the direction of high micro-nano integration. Although CPU and graphics card manufacturers actively improve the manufacturing process to make the power smaller and smaller, it is inevitable that the stronger the computing power of the CPU and The heat dissipation problem of the graphics card is getting more and more serious, and the noise of the fan when it rotates at high speed is very loud, which affects the mood of computer users for work and entertainment. The existing fan air cooling technology has developed to the bottleneck stage, and it has become a trend to improve the degree of heat dissipation by improving the rationality of the chassis structure and the layout of electronic components on the motherboard. Although water-cooling technology has a good heat dissipation effect, it is not suitable for popularization due to factors such as cumbersome assembly and the need for specific chassis and computer power supplies.

Through the search, the following two related published patent documents were found:

1. A noiseless liquid-cooled computer case (CN201035493Y), which includes a heat-dissipating case shell made of a heat-conducting material with a high thermal radiation coefficient. in insulating heat-conducting liquids.

2. An oil-cooled cycle computer mainframe box (CN103616939A), which has a box body for accommodating a mainboard and onboard equipment, a mainboard fixed on one side of the box body, a CPU radiator, a graphics card and memory fixed on the mainboard; The inside of the box body is filled with mineral oil, and the mineral oil absorbs the heat dissipated by the CPU radiator, graphics card and memory to dissipate heat. The two ends of the box are respectively provided with external circulation pipelines, and the external circulation pipelines are connected with oil pumps; in the running state, the mineral oil filled in the box enters the external circulation pipelines for circulation through the oil pumps; the outer circulation pipelines The outer surface is provided with a plurality of cooling fins, and the heat of the mineral oil flowing through the external circulation pipeline is absorbed and dissipated by the plurality of cooling fins.

Although the above-mentioned patents solve the same technical problem as this patent application, none of them refits the electronic components, and the heat dissipation effect achieved has not been verified by experiments, which is essentially different from the technical solution adopted by this application.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a submerged main engine oil cooling circulation heat dissipation system with scientific and reasonable structural design, which can dissipate heat from the main engine in all directions and keep the temperature of the main engine constant.

The technical solution adopted by the utility model to solve technical problems is:

A submerged main engine oil cooling circulation heat dissipation system, including a main engine box, a power supply installed in the main box, a hard disk, a main board and a heat dissipation component installed on the main box, and injecting into the main box accounts for 1/2-2/3 of the volume of the main box 3. Transformer oil, so that the power supply, main board and cooling components can be immersed in the transformer oil, and a circulating pump and heat exchanger are arranged outside the main box to make the transformer oil form a circulating and cooling circuit.

Moreover, the heat dissipation assembly is composed of heat pipes, heat dissipation fins and fasteners, and the fasteners are assembled from a pressing plate and a backplane. The backplane is installed on the back of the motherboard corresponding to the position of the CPU, and the heat pipes are closely arranged on the upper surface of the CPU on the front of the motherboard. , the heat pipe is U-shaped, the opening is placed in the horizontal direction, and the whole can be divided into three sections: an upper flat part, a lower flat part, and an arc-shaped part. The upper flat part of the heat pipe is bonded to the pressing plate above it, and a cooling fin is embedded between the upper flat part and the lower flat part of the U-shaped heat pipe.

Moreover, a copper sheet is respectively pasted on the inner and outer sides of the arc portion of the heat pipe.

Moreover, the space surrounded by the lower flat parts of two adjacent heat pipes and the CPU is filled with thermal conductive silicone grease.

Moreover, the heat exchanger is a temperature-controlled adjustable circulation radiator.

Advantage and positive effect of the present utility model are:

1. This system uses the characteristics of transformer oil insulation, large specific heat capacity, and good thermal conductivity to make it directly contact with the electronic devices in the computer host, which is equivalent to replacing the heat dissipation medium in the host, and conducts all-round electronic devices on the motherboard. Cool down, thereby improving the heat dissipation efficiency of the whole machine.

2. This system adopts the oil cooling method to cool down the computer mainframe. In addition to reducing the temperature of various components of the computer, since the transformer oil isolates the electronic components from the air, the electronic components in the mainframe will not be slowly oxidized by the air, and can also greatly reduce the temperature. Significantly extend the life of the computer.

3. The heat exchanger of this system is an adjustable temperature control device. By adjusting the fan speed on the heat exchanger, the temperature in the chassis can be kept basically unchanged.

4. This system can not only speed up the calculation speed of the computer, but also reduce the power loss of the fan when the CPU and the graphics card are independently cooled, and the power loss caused by the high temperature of the electronic components of the motherboard.

5. This system uses an external circulation device to cool the transformer oil, so that the original air-cooled heat dissipation device of the computer can be discarded, which avoids the influence of the wear and tear of the fan in the chassis on the heat dissipation effect, and at the same time gets rid of the trouble of cumbersome dust removal of the original equipment.

6. This system is common to all types of main boards, and does not need to consider the structural layout of the main board, which is beneficial to reduce costs, save energy and protect the environment.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is an enlarged view of the structure of the cooling assembly in Fig. 1;

FIG. 3 is a top view of FIG. 2 .

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the utility model.

A submerged main engine oil cooling cycle heat dissipation system includes a main engine box 2, a power supply 11 installed in the main engine box, a hard disk 1, a main board 9 and a heat dissipation component 10 installed on the main machine.

The innovation point of the present utility model is:

1. Inject the transformer oil 8 which accounts for 1/2-2/3 of the volume of the main box into the main box, so that the power supply, main board and cooling components can all be immersed in the transformer oil, and configure the circulation pump 7 and heat exchange outside the main box Connect the oil suction pipe 4 between the circulation pump and the main chassis, connect the oil discharge pipe 3 between the heat exchanger and the main chassis, and connect the oil guide pipe 6 between the circulation pump and the heat exchanger. The transformer oil enters the circulation pump through the oil suction pipe, and then enters the heat exchanger through the oil guide pipe. After exchanging heat in the heat exchanger, it returns to the main chassis through the oil discharge pipe, thereby forming a circulation and cooling circuit of the transformer oil.

2. The heat dissipation assembly is composed of heat pipes, heat dissipation fins 14 and fasteners. The fasteners are assembled from a pressure plate 12 and a back plate 17. The back plate is installed on the back of the main board corresponding to the position of the CPU 16, and is closely spaced on the upper surface of the front CPU of the main board. The heat pipes are arranged. The heat pipes are U-shaped, and the openings are placed in the horizontal direction. The whole can be divided into three sections: the upper flat part 13, the lower flat part 15 and the arc part 19. The lower flat part of the U-shaped heat pipe is connected to the upper surface of the CPU. Bonding, the upper flat part of the U-shaped heat pipe is bonded to the pressing plate above it. Radiating fins are embedded between the upper flat part and the lower flat part of the U-shaped heat pipe. Pass through the backplane, heat dissipation fins and pressure plate, and then engage and lock with nuts, so that the heat pipe and heat dissipation fins are closely attached to the CPU for effective heat transfer.

3. The heat exchanger is a temperature-controlled adjustable circulating radiator, which adjusts the speed of the fan on the water row through the temperature control signal sent by the temperature measuring element, so that the temperature of the electronic components in the chassis is maintained at a certain temperature below 40°C. A stable range, which can make the CPU run in a good state. The structure of the heat exchanger is a prior art, and will not be described here.

In order to make the connection between the heat pipes tighter, not loose, and reduce the gap, a copper sheet 18 is pasted on the inner and outer sides of the arc of the heat pipe, and the arc of the U-shaped heat pipe is sandwiched in the middle, so that the original independent The heat pipes are connected together.

In order to effectively transfer the heat of the CPU to the heat pipe, keep the temperature of the CPU at a stable working level, and prevent the CPU from being damaged due to poor heat dissipation, heat-conducting silicon is filled in the gap between the lower flat part of the two adjacent heat pipes and the CPU. fat (not shown in the figure).

In order to transfer the heat of the transformer oil evenly and effectively, the oil suction pipe is divided into two paths, the nozzles of which are respectively facing the two ends of the heat pipe, and the nozzle of the oil discharge pipe is placed above the heat pipe so that it can directly flush the heat pipe and The heat dissipation fins perform forced convection heat dissipation on the heat dissipation fins, and transfer the heat generated by the CPU work to the transformer oil.

The design principle of the utility model:

Transformer oil is a fractionation product of petroleum, and transformer oil has a much higher dielectric strength than air. Immersing electronic equipment in oil not only improves the insulation strength, but also prevents it from being corroded by moisture. Transformer oil has a higher specific heat than air and is often used as a coolant. This cooling system is designed by taking advantage of these characteristics of transformer oil. Except for the mechanical hard disk in the computer main case, all other parts will be immersed in oil. Use the above-mentioned characteristics of transformer oil to dissipate heat from all aspects of the computer main box.

The CPU is the main heat-generating device in the main chassis, and the heat generated by the CPU is exported by using the heat pipe with good heat conduction effect. Installing cooling fins between the upper flat part and the lower flat part of the heat pipe indirectly increases the contact area between the CPU and the transformer oil. The transformer oil flows out from the oil discharge pipe above the heat pipe, scours the cooling fins of the CPU, performs forced convection heat exchange on the cooling fins, and transfers the heat generated by the CPU to the transformer oil. Use the circulation pump to pump out the high-temperature transformer oil near the cooling fins of the CPU. Through the forced convection heat exchange of the heat exchanger, the heat in the transformer is lost to the air. The cooling fins on the top achieve the effect of forced convection heat exchange. It also exerts an effective disturbance to the transformer oil in the case. Of course, the whole heat dissipation process is controlled by the temperature measuring element, and the speed of the fan on the heat exchanger is changed by the temperature, so that the temperature in the chassis is relatively stable. In this way, the main heat dissipation circuit is formed to ensure the effective heat dissipation of the CPU. Secondly, when the CPU is running at very high power, the temperature of the CPU may be close to a "dangerous" temperature. The temperature of the CPU is measured by the temperature measuring element. When the temperature of the CPU reaches a "dangerous" temperature approximately, the circulation pump flow rate The variable speed switch will be turned on accordingly, and cooperate with the heat exchanger to enhance the heat dissipation effect, strengthen the heat dissipation of the CPU, and make the temperature of the CPU within a relatively suitable temperature range.

Theoretical design calculation of the utility model:

After experiments, when the computer is running under high load, the computer motherboard is immersed in 10L transformer oil, and the transformer oil rises by 15°C without an external circulation pump and heat exchanger. According to the physical parameters of transformer oil, the density of transformer oil is 0.895gcm ³ , and the specific heat capacity is 2.09J (g·℃).

According to the knowledge of heat transfer, it can be calculated that the heat absorbed by the transformer oil within one hour (ignoring the natural convection heat exchange between the heat exchanger oil and the air) is:

Q=cmΔt=2.09×10000×0.895×15=280582.5J

The performance index parameters of the circulating pump, the head H is 6 meters, the flow q _V is 500L/h, and the power is 12W.

Through actual measurement, the oil temperature near the CPU is about 3°C higher than that in other places. Assume that the temperature of the oil drawn by the circulating pump from the vicinity of the CPU is 10°C higher than the air temperature (the room temperature is calculated as 20°C). By checking "Heat Transfer Science", the heat transfer coefficient of oil forced convection heat transfer is 50-1500W (m ² ·K) (here the convective heat transfer coefficient is calculated as 200W/(m ² ·K)), and the air forced convection heat transfer The heat transfer coefficient is 20-100W/(m ² ·K) (here the convective heat transfer coefficient is calculated as 30W/(m ² ·K)), the heat exchange area of the oil side of the heat exchanger is about 0.2m ² , and the air side is added With fins, the ribbing factor is 10, and the total rib efficiency is 0.6.

Through experiments, the temperature of the air passing through the heat exchanger increases by 2°C, and the temperature of the transformer oil drops by 8°C. The logarithmic mean temperature difference Δt _m of the heat exchanger is:

By checking "Heat Transfer", the temperature correction coefficient ψ=0.9 of the heat exchanger can be obtained, so the final convective heat transfer temperature difference Δt _m ' of the heat exchanger is:

Δt' _m = ψΔt _m = 0.9 × 4.32 = 3.90°C

The heat transfer coefficient K is (ignoring the heat transfer coefficient of the metal):

$\mathrm{<span\; class="notranslate">\; K</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{{\mathrm{<span\; class="notranslate">\; h</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}<span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{{\mathrm{<span\; class="notranslate">\; \&eta;h</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}\mathrm{<span\; class="notranslate">\; \&beta;</span>}}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 200</span>}}<span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 0.8</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; 30</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; 15</span>}}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 128.6</span>}\mathrm{<span\; class="notranslate">\; W</span>}<span\; class="notranslate">\; /</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; m</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; \&CenterDot;</span>\mathrm{<span\; class="notranslate">\; K</span>}<span\; class="notranslate">\; )</span>$

From this, it can be calculated that the heat Q _s lost by the transformer through the heat exchanger within 1 hour is:

Q _s ＝KAΔt′ _m ＝128.6×0.15×3.90×3600＝270831.6J

By comparing Q and Q _s , it can be clearly seen that with the function of the circulation pump and heat exchanger, the heat in the transformer oil in the chassis can be effectively dissipated into the air, so that the transformer oil can maintain a relatively constant temperature, and then the main board The temperature can be effectively controlled to improve the working stability of the computer.

Performance benefit analysis of the present utility model:

1. Energy saving benefit analysis

The submerged host oil-cooled circulation cooling system seems to consume more energy than the ordinary cooling system, but compared with the conventional water-cooling system, the two energy consumption is the same, but the conventional water-cooling system can only be used for specific parts of the motherboard. Heat dissipation, while the submerged main engine oil cooling circulation cooling system can dissipate the overall heat dissipation of the motherboard, and some heat-producing components (such as north and south bridges, memory sticks, etc.) that are usually not concerned can also effectively dissipate heat. With the same energy consumption water product, better heat dissipation effect is achieved than water cooling, which is another way of energy saving.

In addition, the motherboard as a whole is at a suitable working temperature, and all electronic components can work under the best working conditions, which reduces the extra power loss caused by excessive temperature.

2. Economic benefit analysis

The submerged main engine oil cooling circulation cooling system can achieve better heat dissipation effect and reduce the extra power loss caused by the high temperature of the electronic components of the main board. Taking an Internet cafe with 100 computers as an example, each computer can save 20W of electricity per hour on average, so the Internet cafe can save 17520kW of electricity a year. Calculated at 0.5 yuan per kilowatt-hour, Internet cafes can save 8,760 yuan a year.

The above is calculated from the perspective of saving electric energy. The submerged computer host oil cooling system can also effectively isolate the contact between the electronic components of the motherboard and the air, slow down the oxidation loss of electronic components, and protect the effective connection of various interfaces; It will also speed up the loss rate. According to the data, the operating reliability will decrease by 3.8% when the chip temperature increases by 1°C, and the service life will increase by 50% when the chip temperature decreases by 10%. Therefore, the use of the submerged computer mainframe oil cooling system can extend the replacement period of the computer mainframe and save the cost of replacing various electronic components.

3. Social benefit analysis

The submerged oil cooling circulation heat dissipation is a brand-new heat dissipation mode, which breaks the traditional heat dissipation concept, and also brings considerable economic benefits, making people's life more efficient and convenient. Through the dissemination and promotion of immersion oil cooling and heat dissipation, the concept of energy saving and emission reduction will also be deeply rooted in the hearts of the people, and it will also help people conduct more in-depth exploration on the road of energy saving and emission reduction.

At the same time, the popularization and application of submerged oil cooling cycle heat dissipation will also drive the development of an industrial chain, including the product development, production, sales and improvement of the heat dissipation structure of the oil used. At the same time, in the submerged oil-cooled environment, chip manufacturers are allowed to carry out research and development of related products in the new environment. With the support of chip manufacturers, the electronic devices are combined with the submerged oil-cooled environment, and the performance of the computer reaches a higher level. , so that the user experience is further improved, which is conducive to the development of the computer industry.

Claims (5)

1. A submerged main engine oil cooling circulation heat dissipation system, comprising a main engine box, a power supply installed in the main engine box, a hard disk, a mainboard and a cooling assembly installed on the mainboard, it is characterized in that: in the main box, inject 1/2-2/3 of the transformer oil, so that the power supply, main board and heat dissipation components can be immersed in the transformer oil, and the circulating pump and heat exchanger are arranged outside the main box, so that the transformer oil forms a circulating and cooling circuit. 2. The submerged main engine oil cooling circulation heat dissipation system according to claim 1, characterized in that: the heat dissipation component is composed of heat pipes, heat dissipation fins and fasteners, the fasteners are assembled from a pressure plate and a back plate, and the back plate Installed on the back of the mainboard corresponding to the position of the CPU, heat pipes are closely arranged on the upper surface of the CPU on the front of the mainboard. The heat pipes are U-shaped, and the opening is placed in the horizontal direction. The whole can be divided into three parts: the upper flat part, the lower flat part and the arc part Section, the lower flat part of the U-shaped heat pipe is attached to the upper surface of the CPU, the upper flat part of the U-shaped heat pipe is attached to the pressing plate above it, and is embedded between the upper flat part and the lower flat part of the U-shaped heat pipe cooling fins. 3. The submerged main engine oil cooling circulation heat dissipation system according to claim 2, characterized in that: a copper sheet is pasted on the inner and outer sides of the arc portion of the heat pipe. 4. The submerged main engine oil cooling circulation heat dissipation system according to claim 2, characterized in that: the gap surrounded by the lower flat part of two adjacent heat pipes and the CPU is filled with thermal conductive silicone grease. 5. The submerged main engine oil cooling circulation heat dissipation system according to claim 1, characterized in that: the heat exchanger is a temperature-controlled adjustable circulation radiator.