博文

目前显示的是 八月, 2019的博文

Why can't copper and aluminum coexist in a water-cooled computer?

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Anyone who has used a water-cooled computer knows that copper and aluminum should be avoided in the water-cooled circulation system.   The fear is that the two produce galvanic battery reaction, will corrode the cold head or cold row. So why does this happen?   First we need to figure out what a galvanic reaction is, and in a galvanic cell, the chemical reaction that happens is REDOX.   There are electrons flowing out of the electrode where the oxidation reaction takes place, and the substance losing electrons is the reducing agent.   Electrons flow through the negative electrode of the galvanic cell through the wire to the positive electrode, where the oxidant gets electrons and a reduction reaction occurs.   Galvanic cells convert chemical energy into electrical energy through chemical reactions. There are four indispensable conditions for the formation of a galvanic cell: 1. Two kinds of metals with different activity make up the electrode. 2. Electrolyte solutio

Heat dissipation scheme of machine tool

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The  machine tool  is an important tool for processing parts. The machine tool is affected by the change of environment temperature in the workshop, the heating of electric motor and the friction heating of mechanical movement, the heating of cutting and the cooling medium, resulting in the uneven temperature rise of all parts of the machine tool, resulting in the change of the machine tool shape precision and machining precision. For example, when a 70mm×1650mm screw is processed on a CNC milling machine with ordinary precision, the cumulative error can vary by 85mm compared with the workpiece processed between 7:30-9:00 am and 2:00-3:30 PM.   Under constant temperature, the error can be reduced to 40mm. Influence factors of internal heat of machine tool (1) structural heat source of machine tool.   Motor heating, such as spindle motor, feed servo motor, cooling and lubrication pump motor, electric control box, can generate heat.   These conditions are allowed for the

LED application prospect and trend

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At present, lighting consumption accounts for about 20% of the total electricity consumption, greatly reducing lighting consumption is an important way to save energy, in order to achieve this goal, the industry has developed many kinds of energy-saving lighting appliances, and achieved certain results.But, distance "green illume" requirement still is far from enough, development and application are more efficient, reliable, safe, durable new illuminant imperative. LED with its inherent superiority is attracting the attention of the world.   The United States, Japan and other countries and Taiwan have predicted the efficiency of LED lighting . In the United States, 55 percent of incandescent lamps and 55 percent of fluorescent lamps are replaced by LED, saving 35 billion us dollars in electricity bills and reducing 755 million tons of carbon dioxide emissions annually.   Replacing 100% incandescent lamps with leds in Japan can reduce the power generation of one or

Lori cooling keeps your electronics safe

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The development of society is inseparable from science and technology, and the development of science and technology is inseparable from electronics.   Without the rise of the electronic industry, there would be no third industrial revolution that has lasted till now. Nowadays, electronic equipment has penetrated into all walks of life, and it has dominated the majority of production and life.   Moreover, it has seriously captured the freedom of human beings. We need computers for office work, televisions and mobile phones for leisure and entertainment. It seems that without it, human beings lose the ability to live independently. Electronic development is extremely rapid, and electronic equipment heat dissipation also experienced natural heat dissipation (passive heat dissipation) to air-cooled heat dissipation, and then to water-cooled heat dissipation, this is a period of exploration and summary of actual combat experience in the progress of electronic development. T

Semiconductor applications and heat dissipation

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A semiconductor is a silicon crystal whose electrical conductivity is between a conductor and an insulator. Semiconductors are solid materials that guide the electrical capacity between metals and insulators.   Semiconductors are similar to insulators in that they contain just enough valence electrons to fill the valence band and are separated by the forbidden band and the conduction band above.   The difference between semiconductors and insulators is that the gap is narrow, below 2 to 3 electron volts. Typical semiconductors are covalently bonded, such as crystalline silicon and germanium.   A semiconductor conducts electricity by electrons in the conduction band or by holes in the valence band.   Its conductivity is usually controlled by mixing atoms with impurities instead of atoms.   If the added atom has one more valence electron than the original atom, the electron conducts electricity. If the impurity atom is one less valence electron than the original atom, hole c

Power industry equipment chip cooling solutions

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Nowadays, with the rapid development of the industry, there are more kinds of equipment. Many equipment is running in a 24-hour long cycle, and some equipment cannot even run in a safe and stable long cycle, which makes many technicians in the power industry have a headache.   Therefore, in order to solve this problem, LORI   can process and customize power industry equipment and chip cooling for users according to the current situation of the power industry.   Below small make up for you to briefly introduce the full cover type of some of the board, the details are as follows: The fully covered water-cooled plate processed by LORI is welded with aluminum alloy instead of steel plate, and its structural weight can be reduced by more than 50%. It has the characteristics of light weight, high strength, good corrosion resistance, non-magnetic, good formability and good low-temperature performance, which are mainly used for heat dissipation of power equipment chips.   At the sa

The printer can also use water cooling

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We are all familiar with the printer, one of the necessary office tools for work.   From inkjet, needle, laser, to the current popular 3D technology, the development of printers is relatively fast.   At the same time of gradual improvement in performance, the price is also reducing, making the office more convenient. 3D printing technology  is still far away from us. We are most exposed to printers in daily office.   Careful friends will notice that the printer after a long time of work, the printing efficiency is significantly reduced, and the fuselage is easy to get hot, even in emergency to shut down the rest to restore the printing speed.   There are many factors affecting the printer, temperature, hardware aging, working time will directly affect the work efficiency of the printer.   Replacing old parts, wiping the body to speed up cooling, and turning it off when not in use are common options for smaller printers.   But for some large printers, it's not so easy.  

Beauty instrument cooling solution

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Since the 1990s, science and technology professionals and technical equipment in the fields of medicine, chemistry, electricity and optics have entered the beauty industry, bringing more raw materials, equipment and high-tech to the industry.   Beauty instrument is born in the high-tech products.Scientific and technological beauty equipment for many people to support the courage to lose weight, thin body, so that high-tech research and development of beauty equipment finally returned to a simple, convenient operation, this is the benefit of scientific and technological progress, always can let the beneficiaries save a lot of trouble. With the continuous progress of the society, there are more and more beauty products. With the progress of industry and the improvement of engineering design ability of different industries, the rapid development of beauty industry is facilitated by shrinking all kinds of products into smaller and more powerful functions. With the constant incre

How to avoid CPU overheating

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1.  Try not to run the CPU at full load for a long time. 2.  Check whether the CPU fan is normal. On the one hand, check whether the fan rotation is normal; on the other hand, check whether there is a gap between the heat sink fin and the CPU. The back of the heat sink  fin can be coated with silica gel to improve the heat conduction. 3.  Ensure the air circulation of the chassis and control the indoor temperature.If the chassis is not cleaned for a long time, dust will block the air inlet and outlet, reducing heat dissipation efficiency.   Run the same program in summer and winter, but the CPU temperature is greatly affected by the outside temperature. 4.  H igh-end computer suggested to change the way of heat dissipation, you can choose water cooling heat dissipation , there are currently integrated water cooling and split water cooling, is the current mainstream installation scheme .

Where does the heat of cpu come from?

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You know how the CPU radiates heat , but where does the heat come from? Let's analyze it here. Cpus are made on extremely pure silicon.   A CPU chip contains millions of delicate transistors. Transistors are chemically etched or lithographed onto a silicon wafer the size of a fingernail.   Thus, in this sense, the CPU is composed of transistors.   In simple terms, transistors are tiny electronic switches that are the building blocks of cpus. You can think of a transistor as a light switch.   This switch on and off corresponds to the switch off and on of the transistor: 1. Joule heat is the heat generated when an electric current is connected to the microelements in the CPU. 2. The amount of heat generated when an electric current passes through a capacitive or inductive element, which is relatively small. The CPU is an extremely large stack of transistors made of monocrystalline silicon. 3. The leakage of electricity between two wires, that is, the heat generat

Why is the cooling of electronic devices so important?

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Electronic equipment, all away from the topic of heat dissipation. Small to our life and office computers, large to industrial medical and other industries of large equipment , all are unable to escape the problem of heat.   So why is cooling so important? Speaking of heat dissipation, the first to understand why heat, take the computer CPU for example.   The CPU is made up of hundreds of millions of transistors, which act as circuit switches.   The heat generated when an electric current is connected to a microelement in the CPU is called joule heat.   The amount of heat released by the current as it passes through the pn junction, which is the majority, is usually proportional to the frequency, proportional to the square of the current.   So the faster the computer, the more work the processor does, the more heat it generates. How much heat can these chips emit?   Some netizens have tested, running large games, unplug the CPU or graphics card heat sink , just removed the

Why is the CPU frequency increasing more slowly?

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CPU frequency is an important parameter to judge CPU performance, the higher the frequency, the faster the efficiency, the faster the computer runs.   Since the higher the main frequency, the faster the speed, vigorously research and development of high main frequency of the CPU can, why now the maximum frequency of the CPU is not more than 5GHZ, and vigorously do multi-core CPU? Let's first understand how the transistor power is calculated, the static power is the conventional voltage times the current, W=V x I.   However, the transistor generates dynamic power consumption, W=V2 x F, according to the conversion frequency when converting between analog signals. Obviously, the higher the frequency, the higher the power consumption.   Our semiconductor technology continues to improve, and we are now able to produce 10nm and 7nm in volume. According to dennard's scaling, the process improvements, which allow transistors to make smaller, lower switching voltages, appare

What if the server workstation generates too much heat?

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A server, also known as a server, is a device that provides computing services.Since the server needs to respond to the service request and handle it, generally speaking, the server should have the ability to undertake the service and guarantee the service. The structure of the server includes the processor, hard disk, memory, system bus, etc., which is similar to the general computer architecture. However, due to the need to provide highly reliable services, it requires high processing capacity, stability, reliability, security, scalability, manageability and other aspects. In the era of IT Internet, the exchange of electronic information is highly dependent on the server, and the positive response can be reflected in the user's experience.   We often see in the news that the server crashes due to a large number of users visiting a large website or APP, which is why the server plays an important role in the era of electronic information. Since the server is import

CPU cooling has to be considered

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In recent years, DIY machines have been paying more and more attention to the cooling problem of CPU . Air cooling does not seem to meet most people's needs. Water-cooled cooling is more popular. On the one hand, water-cooled cooling is really efficient. On the other hand, its unique shape and built-in lighting make it look better. Integrated CPU cooling Water is cold come loose come loose is popular, because the price of radiator of an one piece water is cold, also do not pass two 300 yuan, differ not quite with the wind cold radiator of high-end a bit.   And the fresh way, always young people like. Of course, some people like split-type water cooling, which can connect the CPU and gpu to achieve multiple cooling. Opting for water-cooled cooling means it costs more. For example, if you choose to use water cooling mode to dissipate heat, you need a better chassis, because the space and principle of water cooling radiator need a better chassis for support. Especially the

IGBT water cooling solutions

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IGBT is the core device of energy transformation and transmission, commonly known as "CPU" of power electronic devices. As a national strategic emerging industry, IGBT is widely used in rail transit, smart grid, aerospace, electric vehicles and new energy equipment and other fields.   From the function, IGBT is a circuit switch, used in the voltage dozens to hundreds of volts magnitude, current dozens to hundreds of amperes magnitude of strong electricity.   (relatively speaking, mobile phone, computer circuit board running low voltage, mainly to transmit signals, are weak electricity.)   You can think of it as a transistor with very high voltage and current. IGBT temperature will rise due to its own power loss.There are two main reasons for the heating of power devices: one is the on-state loss when the power devices are switched on;   The second is the switching loss in the process of switching on and off power devices.   IGBT power consumption is mainly compose

How to solve the heat dissipation problem of concert stage lighting

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Stage lighting is one of the means of stage art modeling.Use of stage lighting equipment, such as lighting lamps and lanterns , lantern, control system, etc.) and the technical means, with the development of the plot, with light color according to the environment and its change, apply colours to a drawing atmosphere, highlight the central character and create stage space feeling, sense of time, portray the external image of the stage, and provide the necessary lighting effects (wind, rain, cloud, water, lightning). As market of lamps and lanterns expands ceaselessly, the lamps and lanterns that people tends to have high quality characteristic more to the requirement of stage lamplight is like: "energy-saving and efficient, colourful, use convenient, long life" wait for a characteristic to be the primary choice of the user.At the same time as the stage lights are shining, the stage lights will also heat up naturally, in order to keep the stage lights running normall

How does the high power CPU dissipate heat?

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In August, AMD's thread ripper ii will be released, with a 32-core 64 thread and a power consumption of 250W.   This is twice the power consumption of mainstream CPU, heat can be imagined. If it's 250 watts you have to have a more powerful heat sink  to suppress it.   Choose air - cooled, the basic only consider the top, such as owls.   Owl serves as high-end heat sink , actual strength nature is intrepid, nevertheless the price is not low.   However, it can solve more than 200 W of heat is the industry leader. In addition to high-end air cooling, there are also integrated water cooling can be used.   Aim at such quantity of heat, also want 1000 yuan of above ability to suppress very well at least.360 cold exhaust must not be less, even so the estimated temperature is about 80 degrees.   The ultimate solution, or split water cooling. In the last two years the CPU has clearly begun to move towards multi-core development, and the main battleground in the f