Water cooling applications

Water cooling is no stranger to IT enthusiasts. IT is a popular cooling method besides air cooling. Due to its bold refit and strong DIY features, IT has won the favor of some players. Water cooling is also flourishing.

So water cooling, in addition to the application of computer cooling, where will be applied? In fact, the application of water cooling is very wide, not exaggerating to say that the use of wind cooling cooling place can be solved with water. It can also be argued that any electrical device that has heat can be cooled with water.

Beauty equipment, LED electronic equipment, medical equipment, commercial printers, automobiles, digital machine tools and so on, can be cooled with water to solve the heating problem. Heat is the number one enemy of electronic devices, and overheating can lead to production inefficiencies, production deviations, life expectancy and other problems.

Traditional air-cooled cooling does have many advantages, but with the continuous development of science and technology, cooling requirements are sometimes not met, so cooling must have a revolutionary change, in order to keep up with the development of The Times.

The essence of water-cooled heat dissipation is the heat transfer process, which is an active heat dissipation mode. When heat is generated, it absorbs heat through water-cooled blocks, and then it is carried away by flowing liquid. The advantages of water cooling are also obvious. It can control the temperature range stably and operate quietly, thus increasing the working efficiency and service life of the equipment.

If you have an electronic device struggling with heat, try water cooling. Lori has a wealth of solutions to heat dissipation in a variety of electronic devices, which can be customized even without a formed device.

From the perspective of the development of the market, water cooling and heat dissipation is an emerging industry, but also has great potential. I believe that with the gradual maturity of water cooling and heat dissipation, its application will be more extensive.

Various industrial equipment can also use water cooling

Water-cooled is the most common desktop cooling. Desktop cooling, cool appearance, cooling good mute and other characteristics, by players love. Then also as an electronic device, the need for heat dissipation is not only desktop. All kinds of industrial equipment and medical equipment need heat dissipation to protect.

Most people don't know much about the heat dissipation of these devices, but as the users of these devices, the heat dissipation often bothers them. For example, laser cutting machine, marking machine, medical detection instrument, detection instrument, projector, LED equipment, these equipment usually work for a long time. If the heat accumulated continuously cannot be effectively lost, then one is to reduce the working efficiency, the other is to seriously affect the life of the equipment.

Air cooling is cheap and practical, but the cooling efficiency of long hours of work also shows a straight downward trend.If the device is used only occasionally, then air-cooled cooling is enough. But for equipment that has been used for a long time, air cooling is not worth the cost.

So many electronic equipment, in fact, heat dissipation principle is the same, like personal computers, find the heat dissipation core, with heat cooling head to cover, with water pipes connected to the pump, cold drainage, constitute a water cooling system, can work. Water cooling can also be based on the actual heating situation, customized water cooling components. For example, if the amount of heat is large, the liquid flow can be increased, and the area of heat dissipation and exhaust can be increased.

Wind power inverter cooling solutions

With the increasing awareness of environmental protection and the need for renewable energy, wind power technology has been increasingly valued. Due to the instability and randomness of wind energy, the electric energy generated by wind generators is alternating current with random changes in voltage and frequency. Only after effective power transformation measures are taken can wind power be sent to the grid. In order to improve the operation performance of wind turbine power generation system, a variable speed wind power generation system based on ac - dc - ac converter has been developed in recent years.

In ac-dc-ac variable speed wind power system, the control technology of inverter is the key. The inverter directly takes the voltage synchronization signal of power grid as the tracking signal of inverter output current, which can make the output current track the power grid voltage quickly. Inverters are used in solar installations to convert direct current generated by solar panels into alternating current that can be used in the grid. Both applications face severe thermal challenges that require complex thermal management solutions and become more difficult as power density increases.

Under the circumstance that the existing heat dissipation cannot be satisfied, the reform of heat dissipation technology is increasingly severe. As a new type of heat dissipation technology, liquid cooling technology has been paid more and more attention by experts. Water cooling has the characteristics of quiet, strong sustainability, high cooling rate, in addition to common used for computer cooling, but also widely used in electric power, medical, led and other industries, it can be said that water cooling has gradually penetrated into the vast majority of the cooling field.

Why does the water head use copper instead of aluminum?

Play cold water friends know, whether it is cold head CPU or video card, are used in the copper material.The heat conductivity of aluminum, which is commonly used for heat dissipation, is also good, so why not use aluminum as a cold head?

Cold head is the chip, heat transfer heat absorption, the material used to have a high thermal conductivity. So with that said, let's talk a little bit about what thermal conductivity is.

The thermal conductivity coefficient refers to the heat transfer through an area of 1 square meter (watt/meter · degree) in 1 second (1s) under stable heat transfer conditions. The temperature difference between the two sides of a material 1m thick is 1 degree (K, ℃).

The general idea is how fast something transfers heat. Take, for example, holding a stone in hot water, your fingers can barely feel the temperature change. If you touch hot water with an iron rod, your fingers will soon feel the temperature change. This is actually the reason for the different thermal conductivity.

In real life, materials with low thermal conductivity are used as insulation materials, such as asbestos and perlite, which are applied because of their slow heat transfer characteristics. Electronic chip heating requires the rapid release of heat, which requires materials with high thermal conductivity, and metal is the preferred material.The thermal conductivity of copper is 377, that of aluminum is 237, and that of silver is 412. Silver is too expensive to be used as a cold head, so by contrast, copper is the best choice.

Then someone said, in the water - cooled computer heat sink row has the aluminum cold row! In fact, this is related to the specific heat capacity, which is the heat required to increase the temperature of a substance per unit mass by 1 degree, copper is 0.39J/kgK, aluminum is 0.9 J/kgK, so the heat emitted by reducing 1 degree of copper is smaller than that of aluminum, that is, copper should dissipate heat faster than aluminum, so why use aluminum?

It turns out that tin is needed for the welding of the channel with cold discharge of copper, and the specific heat capacity of tin is very large, which restricts the heat dissipation speed of copper, while the density of aluminum is obviously lower than that of copper. For the same type of cold discharge, aluminum is thinner and lighter, making it easier to use. So technically speaking, there is not much difference between copper and aluminum

Water cooling solution of personal server

A server is a high-performance computer in a network environment that listens for service requests submitted by other computers (clients) on the network and provides corresponding services. To do this, the server must have the ability to undertake the service and guarantee the service.

Its high performance is mainly reflected in high speed computing power, reliable operation for a long time, strong external data processing capacity and other aspects. For example, in online games, 100 people are online at the same time, which means there are 100 "clients".

The server is running continuously for a long time, which is different from ordinary PC in terms of heat dissipation and appearance. Due to its high configuration and good scalability, it has excellent performance. Servers typically install a dedicated server-level operating system and then set up WEB services. Because of the high performance requirements, the service's processors are more powerful and hotter than those of ordinary desktops.

Using air - cooled heat dissipation, in addition to abnormal noise, heat dissipation effect is not ideal. Personal server cooling is used in the home more, noise is too big to affect life undoubted. Heat dissipation is not good, long-term high temperature, is the use of efficiency is reduced, also greatly shortened the service life of the server. So is there a good solution?

Liquid cold technology heat dissipation can solve most of the heating problems, especially when the indoor temperature is reduced and the effect of air convection is not obvious. Water-cooled can control the cooling core at a very stable temperature, and the operating noise will be reduced several times.

After trying a variety of heat dissipation methods, a number of data show that the advantages of water-cooled heat dissipation are obvious. High heat dissipation efficiency, quiet and stable, can ensure the efficient operation of the server. For individual server users, the cost of retrofitting the water cooling system is not too large, and it is much cheaper than enterprise servers. If you're a home improvement person, consider water cooling.

LED street lamp heat dissipation solution

Modern society is pragmatic and efficient, actively promoting clean energy, wind, solar and other renewable energy is widely used.Clean energy in our lives can be seen everywhere. Familiar street lamps have been widely used with solar power generation and LED lighting. LED is known as the fourth generation lighting source or green light source, with energy-saving, environmental protection, long life and other characteristics. Solar energy and LED are undoubtedly environmental protection resources, but high-power LED street lamps also bring a big problem of heating.

High heat emission and poor heat dissipation control directly affect the working efficiency of LED lamp. According to data, if the luminescence of LED chip is 100% when the junction temperature is 25 ° c, then when the junction temperature rises to 60 ° c, its luminescence quantity is only 90%. When the junction temperature is 100 degrees, it drops to 80%. 140 degrees is only 70%. Therefore, it is very important to improve heat dissipation and control junction temperature. One of the most important benefits of water cooling is that the heat capacity of the liquid is large and the temperature rises slowly. After operation, the temperature rises slowly, especially when the street lamp works for a long time, the continuity of air cooling decreases, which leads to the rise of junction temperature.The stability of liquid cooling is highlighted to ensure the working order.And water cooling heat dissipation efficiency is high, the heat conductivity is more than 20 times of the traditional air cooling, can solve the problem of several hundred to several kilowatts of heat dissipation.

LORI's solution of water cooling and heat dissipation solves a series of problems such as heat dissipation demand and cost limitation. By combining water cooling and heat dissipation with led street lamps, it not only guarantees work efficiency and life, but also reduces the trouble of later maintenance. With the acceleration of China's urbanization construction, a large number of Led street lights need to be applied, and the problem also follows. How to solve the worries of a large number of manufacturers needs to introduce new technologies creatively, so the application of water cooling will be conducive to the healthy development of the led industry.

Water cooling solution for laser treatment instrument

Laser instruments have been widely used in modern life, in addition to industrial marking, cutting, welding applications, but also widely used in the medical beauty industry.Such as oral laser treatment instrument, laser eyebrow washing instrument, laser skin beautifying instrument, greatly convenient our life.

The principle that laser instrument can be used as medical cosmetology is actually that it utilizes the three functions of light on tissues: photothermal effect, photodynamic response and photostimulation. Its painless and fast features are popular. The application of these laser devices has played a good role in promoting social development, and as the users and producers of these devices.Despite the sophistication of the technology, there are some small problems. In particular, heat dissipation is inevitable, but the perfect combination of good heat dissipation and equipment is a tricky problem.

Laser generation is complex, involving light, atoms and other physical knowledge, but no matter what purpose of laser equipment, when working will produce a lot of heat. Heat is the scariest for industrial and medical devices, and can have a big impact if not released in time. Light will burn laser equipment, heavy will affect production and use.Take semiconductor laser for example, 50w needs to use cooling capacity of more than 1200w heat dissipation equipment. In the case of forced convection, the heat transfer coefficient of air is 20-100w/㎡▪k, and the heat transfer coefficient of water is 1000-15000w/㎡▪k. In other words, at the same temperature and area, the heat transfer of water is dozens of times that of air. If using air cooling to achieve the same heat dissipation efficiency can only improve the speed, but also increase the noise. In fact, no matter from a professional point of view, or the trend of cooling solutions, water cooling is a very good solution.

From the application of computer to water cooling, it is not difficult to find that the characteristics of quiet and high efficiency have well proved the reliability of water cooling. If you're still struggling with heat dissipation from laser equipment, consider water cooling.

Water cooling and heat dissipation technology of IGBT

IGBT (Insulated Gate Bipolar Transistor), Insulated Gate Bipolar Transistor, is by the BJT (Bipolar Transistor) and MOS (Insulated Gate field-effect tube) composite composed of full control voltage drive type power semiconductor devices, with high input impedance of MOSFET and GTR low conduction of the advantages of both the pressure drop. GTR has low saturation voltage and high current-carrying density, but high driving current. MOSFET drive power is small, the switch speed is fast, but the conduction pressure drop is large, the current density is small. IGBT combines the advantages of the above two devices, with low driving power and low saturation voltage. Very suitable for dc voltage of 600V and above converter systems such as ac motor, inverter, switching power supply, lighting circuit, traction drive and other fields.

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.

Generally speaking, the current flowing through IGBT module is large and the switching frequency is high, which leads to the high loss of IGBT module devices and the high temperature of devices. However, the IGBT module's poor heat dissipation will cause damage and affect the operation of the whole machine. IGBT overheating reasons may be the drive waveform is not good or excessive current or switch frequency is too high, may also be due to poor heat dissipation.

If the temperature is too high, the working efficiency of the module will decline, which will affect the whole working progress. Especially for those devices that need continuous work, IGBT module is more dependent on, and a good cooling system is needed to ensure. Speaking of heat dissipation, the most commonly used are passive fin heat dissipation, wind cooling heat dissipation, these heat dissipation methods, low cost, easy to use and widely used. However, there are also many constraints. The accumulation of heat is too large to be dissipated in time, and the cooling effect quickly reaches the bottleneck. In this case, IGBT module faces a big dilemma.

In this case, the new heat dissipation mode must replace the traditional heat dissipation mode. As a fast developing way, water-cooled heat dissipation has been prominent in the field of heat dissipation in recent years. Water cooling makes use of the feature that the specific heat capacity of liquid is larger than that of air to absorb heat quickly and fully. After passing through the circulation system, it reaches cooling and exhaust, and then returns to the waterway system. The cycle has been repeated, to continue to heat, if the peak heat, can also be more leisurely to deal with. With the progress and improvement of water cooling and heat dissipation technology, the water cooling and heat dissipation is safer and more durable, and the cost is also reduced. Although installation and maintenance are a little inconvenient, in the long run, water cooling technology is worth putting into use.

How to solve the heat dissipation problem of photovoltaic equipment

Photovoltaic inverter is the core equipment of photovoltaic system, whose main function is to convert the direct current generated by photovoltaic modules into alternating current meeting the requirements of power grid.

As a power electronics device, inverters face the same temperature challenge as all electronic products. According to a survey report from the overall avionics research program of the us air force, the failure rate of all electronic products is up to 55% of the time due to temperature.

The electronic components inside the inverter are also very sensitive to the temperature. According to the 10-degree rule of reliability theory, from room temperature, every 10-degree increase in temperature will halve the service life. Therefore, the design of inverter heat dissipation is very important.

The traditional heat dissipation methods include passive heat dissipation and air cooling heat dissipation. Passive cooling refers to natural cooling, which is often suitable for low-power devices and components with low heat flux and low heat flux due to low temperature control requirements and device heating. Air cooling is a method of forcing the air around the device to flow with the help of fans and so on, thus carrying away the heat emitted by the device. Air cooling can be used in a wide range, but there are also too much noise, dust accumulation and other problems.

As for the problem of air-cooled heat dissipation, water-cooled heat dissipation is well solved. Water cooling is more efficient than air cooling, and it transfers the core temperature to the outside or away from the core, so as to ensure that the overall temperature of the core components will drop, without heat accumulation. The relatively closed space makes the equipment free from dust. In addition, water cooling has the characteristics of longevity and stability, later maintenance, will not be too frequent.

Water cooling and heat dissipation is a major trend in the field of heat dissipation. Despite the disadvantages of high cost and narrow coverage, with the development of production, more and more industries will accelerate the research and innovation of water cooling and heat dissipation. So that more industries with better water cooling solutions.

Are water-cooled computers really safe?

A lot of people who are new to water-cooled computers will be a little skeptical. Will the water leak out and burn the computer? Is it difficult to install such a computer? The safety of water-cooled computers has been largely questioned. So is it easy for water-cooled computers to leak?

In fact, the probability of water-cooled computer leakage is very low, even if the situation of leakage, also mostly due to carelessness.The primary purpose of a water-cooled computer is security. The safety and sealing of water-cooling accessories are very important. Water-cooling accessories are professionally designed to theoretically ensure that there is no possibility of leakage.

On the other hand, the production process of water-cooling accessories is also very advanced, with high precision and very small error, which further ensures the safety.In addition, water-cooled products are tested for leakage before leaving the factory, so that no leakage can leave the factory.These are all pumps, cold head and cold discharge must go through the process, so the possibility of leakage of these accessories is very low, unless the violent extrusion damage, generally not leakage.

Leaks usually occur during installation, where water-cooled fittings need to be connected with water pipes and many joints are used for both hoses and hard pipes. The hose is relatively safer, the number of joints is less, after the tube is inserted and then stuck with the spring card, further ensuring the safety.

And hard pipe water cooling use of quick twist and elbow, extension head more, and each joint has more than one sealing ring, the installation will forget one or two places to install the sealing ring, or pipe grinding is not careful, tied the sealing ring, this case leakage ratio is larger.However, once the pipes are installed, they are tested, so wrap the joints in toilet paper or a towel so you can see where the leaks are. So pay attention to these details, you don't have to worry about leakage.

In addition, some water cooling computer with a long time will also have leakage phenomenon, most of this situation is due to the sealing ring aging, the water temperature is too high for a long time to make the sealing ring aging. Usually pay more attention to waterway temperature, observe the cold head and water pump and other blockage, diligent maintenance of the water cooling computer life has greatly improved.

Liquid cooling solution for power battery

Power battery is the power source that provides power for tools. It mainly refers to the battery that provides power for electric cars, electric trains, electric bicycles and golf carts.

There are many types of power batteries, suitable for different scenarios. Either way, the heat will continue to heat up in the working condition, which is a test for the cooling system. In particular, with the rapid development of electric vehicles, there are more and more long range and efficient batteries, and cooling is always a key technology. In recent years, water cooling technology, also known as liquid cooling technology, began to be introduced.

So what is power battery liquid cooling?

The typical liquid cooling system of power battery must have the following components: water cooling block, circulating liquid, pump, pipe, water tank heat exchanger. A water-cooling block is a metal block made of copper or aluminum with a water channel inside that contacts the battery and absorbs its heat. The circulating liquid is circulated through the pipe by the pump. The circulating liquid that absorbs the heat of the battery will flow away from the water cooler, and the new low-temperature circulating liquid will continue to absorb the heat of the battery.The water pipe connects the pump, water cooling block and water tank. Its function is to circulate circulating liquid in a closed channel without leakage, so that the liquid cooling cooling system can work normally. The water tank is used to store circulating fluid, and the heat exchanger is a finer-like device, in which the circulating fluid transfers heat to a radiator with a large surface area, and the fan on the heat sink carries the heat into the air.

The essence of liquid cooling is the same as that of air cooling, except that liquid cooling USES circulating liquid to transfer the heat of the battery from the water cooling block to the heat exchanger and then gives out, replacing the homogeneous metal or heat pipe of air cooling, and the heat exchanger is almost a copy of air cooling heat sink. The liquid cooling system has two major features: balanced battery heat and low noise work. Due to the heat capacity of the water is very big, so that can absorb a lot of heat and keep the temperature not obvious change, the temperature of the surface cells in the system can get good control, emergency operation will not cause the battery internal temperature instant changes significantly, because of the heat exchanger surface area is large, so only need low speed fan for heat dissipation can play a good effect, so most of liquid-cooled collocation fan rotational speed is low, in addition, the water pump working noise generally is not very obvious, so the whole cooling system compared with air cooling system was very quiet.

Application of water cooling heat dissipation of stone carving machine

Carving machine users have the same feeling, carving machine used for a long time will generate heat, at this time, the motor is too hot will cause some negative effects, we should consider how to heat.When the temperature of stone carving mechanical and electrical machine is too high, you can choose to stop the machine to rest for a period of time, continue to work, you can also add heat radiation in the motor, to ensure the timely emission of heat.

The following to introduce some heat dissipation tips: electrical heating temperature range depends on the carving of electrical machinery insulation. General internal insulation at high temperature (130 degrees) will be destroyed.The motor will not be damaged as long as it does not exceed 130 degrees, but at this time, the surface temperature is below 90 degrees. Therefore, the motor surface temperature at 70-80 degrees is normal. Simple point-of-temperature thermometers are useful, and you can be pretty sure: 1-2 seconds for hands, no more than 60 degrees, and only hands, about 70 or 80 degrees; A few drops of water quickly vaporizes, so 90 degrees.

Engraving machine heat dissipation is also very important, commonly used passive heat dissipation and air-cooled heat dissipation.For the machine of low power, can use passive heat dissipation to solve. Taking advantage of the temperature difference between the environment and the equipment, while cooling naturally, is simpler and cheaper.Suitable for low power, short time working equipment heat dissipation.

Air-cooled heat dissipation is more extensive, most are also used in this way. Air-cooled heat dissipation USES the fan to blow away the heat, so as to rapidly dissipate heat. But air cooling also has many disadvantages.Like the long hours, the noise is really loud. And easy accumulation of dust, resulting in poor cooling effect.

Water cooling is to add a heat absorption head on the surface of the heating core, which can flow through the water, thus carrying away heat to achieve cooling effect. Or an external water-cooling device that works the same way. The disadvantage of water cooling is its high cost. The advantage is that its heat dissipation effect is quite good, and will not be disturbed by dust.

With the increase of high power engraving machine, heat dissipation problem has become increasingly severe, water cooling heat dissipation as a new trend in the field of heat dissipation, will play an increasingly large role.

How do industrial cameras cool their heat with water

Industrial camera is a key component of machine vision system. Its most essential function is to convert optical signal into hd industrial camera into ordered electrical signal. Choosing the right camera is also an important link in the design of machine vision system. The camera not only directly determines the resolution and quality of the collected image, but also directly relates to the operation mode of the whole system.

Industrial cameras are commonly known as camcorders. Compared with traditional civilian cameras (camcorders), industrial cameras have high image stability, high transmission capacity and high anti-interference ability. At present, most industrial cameras in the market are based on CCD or CMOS chips.

With the increasing maturity of science and technology, industrial cameras have developed rapidly. In recent years, foreign industrial camera manufacturers have risen rapidly and become leaders in the field of machine vision. Representative ones include XIMEA camera in Germany, NET camera in Germany, and Unibrain camera in the United States.

At the core of industrial cameras, a large amount of heat is inevitably generated by synchronization when working, and the internal precision components are sensitive to temperature. After reaching the critical value, even a one-degree rise in temperature may lead to a decrease in efficiency. Therefore, the cooling components of industrial cameras are even more important.

As a new trend, water-cooled is gaining more attention. The advantages of water cooling are quiet, stable, efficient and green. The key is to transfer heat from the core to the outside for cooling, so that the temperature of the core area is lower, that is, the temperature is more balanced. Can ensure efficient operation, for industrial cameras is a more appropriate way of heat dissipation.

Heat dissipation of industrial cameras is very important, and water-cooled heat dissipation can help its great development.  

How to distinguish the water cooling plate is good?

See material pledge. Most of the water-cooled heat dissipation plates in the market are designed by burying copper pipes in aluminum plates. This kind of water-cooled plates USES aluminum and copper alloys with high cost performance ratio and relatively low cost. Look at the quality of aluminum and copper, whether there are impurities, that is, the quality of raw materials.

See the process. Material can be the same but different process, the effect of the heat sink is completely different. The process from two aspects, on the one hand is carried out in accordance with the design drawing production, whether from the drawing parameters shown in use vernier caliper to inspect, the error is within 0.05 mm can be regarded as qualified, if demand is high, the accuracy of 0.02 millimeters.

On the other hand, from the work of the water cold plate, because through the copper tube buried aluminum plate technology, there will be a problem of adhesion. If there is a gap between the two, it will affect the heat dissipation effect and even leakage. And copper pipe and aluminum plate through the process of the buried pipe connect together, again by grinding or fly the process for processing, make the whole piece of water-cooled plate to form a smooth surface, whether quality can also be observed from this plane level off, the copper pipe and aluminum have fused into a plane, have crack or uneven will affect the heat dissipation effect.

Through several aspects, we can roughly judge the advantages and disadvantages of a heat sink water cooling plate. If the requirements are higher, we can ask for the measured data of cooling from the supplier, which is more accurate.