Introduction to pressured tube processing technology of LORI’s liquid cooling plate

The liquid cooled heatsink has a very good effect on the heat dissipation of high-power devices, so many users will choose the heat dissipation scheme of the liquid cooled heatsink. The production process of the liquid cooling plates is more complicated than that of the general air cooled heat sink, and the liquid cooling heat dissipation requires higher reliability on the process, so only the strong technical precipitation manufacturers can provide reliable technical support. LORI heat sink has been providing customers with high quality liquid cooled heatsink and liquid cooling solution for many years.

Pressured tube technology is the most used liquid cooling heat sink production custom process, generally speaking, is aluminum base buried copper tube, the aluminum base with CNC machining milling groove, and then using a press will have been bent shape of copper tube pressed to aluminum base, brazing welding, and then after processing into water cooling plate. Buried tube type liquid cooling plate generally has three forms: one is shallow buried tube liquid cooling plate; Second, deep buried tube liquid cooling plate; Three is the welding pipe technology; Four is the double-sided clamp tube technology liquid cooling plate.The three forms of technology are not different, the processing difficulty is the same. Some liquid cooling principles originally designed for high-power switching devices can also be used for reference in power battery cooling systems.

Do you really know anything about liquid cold plate

Liquid cold plate manufacturers pose a great threat to modern electronic equipment, which will lead to unstable operation of the equipment system, shorten the service life, and even burn some parts. Because of the high temperature caused by the paralysis of a lot of equipment, people came up with many ways to solve the problem. Heat sink is the measures to solve the heat dissipation). In many electronic products have Heat sink, such as computer, etc. As a result of product variety more, heat sink variety. liquid cooling plate are one of them.

A cold plate heat sink is a forced circulation of a pump-driven liquid to take away its heat. Compared with the air cooling heat sink , it has the advantages of quiet, stable, little dependence on the environment, etc., The heat dissipation efficiency of the heat sink manufacturer of water cooling plate is related to the thermal conductivity of the heat sink material, the heat capacity of the heat sink material and heat sink medium and the effective radiant area of the heat sink.

Want to know more information on the cost of cold plate, please click on "Cold Plate Manufacturing Cost ".

According to the way of heat taking, the Heat sink is divided into two categories: active heat dissipation and passive heat dissipation.The former is the air cooling Heat sink, the latter is the Heat sink cooling further subdivision can be divided into air cooling, heat pipe, liquid cooling, semiconductor making and compressor refrigeration.Air cooling is the most common and very simple, that is to use the fan to take away the heat absorbed by the Heat sink it has the advantages of relatively low price, simple installation, the goal of the environment is very strong physical such as when the temperature and rate is too high, its thermal performance will be greatly affected

According to the way of heat taking, the Heat sink is divided into two categories: active heat sink and passive heat sink .The former is the air cooling Heat sink, the latter is the Heat sink cooling further subdivision can be divided into air cooling, heat pipe, liquid cooling, semiconductor making and compressor refrigeration. Air cooling is the most common and very simple, that is to use the fan to take away the heat absorbed by the Heat sink it has the advantages of relatively low price, simple installation, the goal of the environment is very strong physical such as when the temperature and rate is too high, its thermal performance will be greatly affected.

How about water cooled plate manufacturer current development situation ?

Water cooling technology of water cooled plate manufacturers has been used for a long time for heat dissipation of mechanical parts, but due to the limitation of some processes or material, has not been widely used. Technical constraints such as machining, pipe embedding, bonding, coolant and leakproof need take a long time to develop and verify. Another reason for the limited application of water cooling plate is the manufacturing cost of water cooling plate

In recent years, with the progress of processing technology and the improvement of machining accuracy of machine tools, the production of liquid cooling cold plate such as microchanneled liquid cooling cold plate is more and more easy to realize.

Lori as a high power heat sink manufacturer, has increased the investment in liquid cooling research and development, the maturity of key processes such as buried pipe and welding, the cost of cold plate decline year by year, no doubt is one of the important advantage promoting water cooled heat dissipation, the application of water cooling technology is in constant expansion, the original is only applicable to automobiles, data center and other large equipment,  now can be used for home computer heat dissipation.

In the recent two years, new energy industry is developing rapidly, more and more new energy use in the field of cold plate , such as a new energy of power battery, electric car controller, pv inverter, wind energy converter are all use liquid cold plates cooling. we can say, in the future, further development of new energy water cooling technology will meet  more widely application. The application and promotion of cold plate liquid cooling technology is based on the high efficiency of water cooling plate. Compared with other cooling methods, water cooling plate has incomparable advantages. Through reasonable heat dissipation design, can effectively and quickly take away the heat, achieve the fast cooling of mechanical parts, ensure efficient operation of machine parts.

Aluminium cold plate

For high-end electronic products, the cooling structure is required to take up as little space as possible. the weight of the lighter the better, the more reliable performance, the better, air cooling heat sink obviously unable to meet this requirement, the designers gradually change from air cooling heat sink to water cooling plate, the solution involves what process can be used to process the custom cold plate to achieve the design intention.

Currently, there are three options:

1. Heat pipe heat dissipation;

2.The aluminum plate buried copper pipe to form a channel heat dissipation;

3. One cold plate, directly milling groove in the aluminum plate , cover plate welding to form a channel. The above three water cooling plate design schemes are analyzed as follows:

Heat pipe heat dissipation: basically is in the vacuum of the tube body form self-cooling cycle, but the scheme can not do large cold plate, at the same time inconvenient maintenance.

Buried pipe heat dissipation: the production cost of buried pipe heat dissipation is relatively low. The grooves are milling out in the aluminum plate and buried into the copper pipe according to the grooves to form a closed channel. The copper tubes and aluminum plates are filled with a gelatin.The scheme can meet the requirements of heat dissipation, but the disadvantage is that a large heat dissipation interval cannot be formed locally and it cannot meet the requirements of heat dissipation of some structural parts.

Integral cold plate: direct groove in the aluminum plate, plate welding forming channel, this needs to choose a kind of welding process on base plate and the cover plate sealing, preliminary selection of brazing process, brazing solder are the shortcomings of easy to loss, loss of solder may clog waterways, loss of the position of the solder will appear the phenomenon of not welded, led to the channel leakage.The yield is subject to manual proficiency, sense of responsibility, consistency of solder and control of the temperature in the furnace. The yield is about 80%.Too many uncertainty factors lead to the use of this process welding liquid cold plate is not reliable, especially on the important structure is rejected this process.

Because of the unreliability of the brazing process, the radar electronic heat sink has sought for the friction stir welding process to produce the aluminum cold plate. The friction stir welding process has shown its incomparable advantages in this product:

1. Welding under normal temperature without groove opening, filler, vacuum or gas protection;

2. Pleasant working environment, no noise, arc and radiation during welding;

3. High yield, numerical control operation, independent of manual proficiency;

4. High efficiency, with the same material and correct parameters, the yield is 100%.

The way of water cooling plate will replace the air cooling heat sink , and friction stir welding process will be favored by the structural designer with incomparable advantages!

Development of friction stir welded cold plate

High performance Cold Plate has been developed by Friction Stir Welding Porcess; The Copper pipe was embedded in the machined groove of aluminum base plate by using Friction Stir Welding , thermal performance of the Cold Plate are approximately 30% higher than that of the conventional Cold Plate fixed by bolts. Strong bonding between copper and aluminum was established by optimizing the  Friction Stir Welding conditions. Lori Quality Engineering was used to seek optimum robust conditions of Friction Stir Welding. Eight control factors were selected from Friction Stir Welding conditions and dimensions of the parts, and noise factors were determined by the gap between the copper pipe and groove of the aluminum base plate. SN ratios of eighteen welded specimens were calculated by thermal performances of specimens. The factorial effects graph was considered from the data of the SN ratios of 18 combinations, the optimum condition was determined by choosing the control factors that had the highest SN ratio. Stable and higher thermal performance was obtained because the Cold Plate was produced under optimum robust condition, even if there were large gaps between copper pipe and aluminum groove before Friction Stir Welding. The Quality Engineering is very effective to seek robust production conditions, many variety of high performance Liquid Cold Plates have been manufactured in short preparation period based on this technique in our company.

Cold plate heat sink experts look into the future of new energy vehicles

Some time ago, many countries have issued a ban on fuel cars timetable, for new energy vehicles is undoubtedly a great benefit, but also to the development of new energy vehicles into a strong power, so the development of new energy vehicles in the future is what? the following cold plate heat sink experts for everyone analysis.

For the development of new energy vehicles, the Chinese government is undoubtedly the most powerful in promoting the development of energy saving and new energy vehicles (2012-2020), which points out that the production capacity of pure electric vehicles and plug-in hybrid electric vehicles in China will reach 2 million by 2020, and the cumulative production and sales volume will exceed 5 million. According to the statistics of water-cooling radiator experts, by the end of 2017, China's new energy vehicle ownership reached 1.53 million, according to the planned development space, the future growth rate will be greater.

In the future, policies on new energy vehicles will be more reasonable. The plan of withdrawing fiscal subsidies for electric vehicles in 2020 has been determined, and the dual-point policy for new energy vehicles will be formally implemented soon. Measures will continue to be taken to expand the sales quota of new-energy vehicles, explore new markets for Shared cars, and improve the construction of charging facilities. In addition to subsidy policies, technical standards on the comprehensive capacity and emission of new energy vehicles will also be improved. Water cooled plate  experts also pointed out that the policy innovation for new energy vehicles will be further promoted. In the future, policies will be guided from the perspectives of carbon trading system, electricity price reform, business model innovation, automatic driving planning layout, and diversified power sources.

New energy vehicle technology innovation will become the focus. New energy vehicles pure electric and intelligent is the future of the most important direction of development, in addition to the water cooling radiator experts think the industry will further increase the research and development of fuel cell engine, fuel powered cars will become in addition to power battery cars a bright spot. The future of new energy vehicles will also be combined with the implementation of major artificial intelligence projects, the development of intelligent networking, automatic driving technology platform. New energy vehicles will also evolve into mobile personal application space and interactive terminals. It can be seen that intellectualization will be an important feature of new energy vehicles in the future.

The market for new energy vehicles is very broad.The innovative development of emerging business models such as Shared cars and self-driving rentals will greatly promote the popularization of new energy vehicles. New energy vehicle enterprises will also gradually transform from a single provision of automobile products to a combination of products, services, charging, operation and other links and a new business model. New energy vehicle will develop into a systematic thing.

The development of new energy vehicle related facilities will be more complete. Charging ways, charging interface will form a unified standard further, new energy vehicle in electricity infrastructure system in field of private and public charging charging pile pile will maintain steady growth, the unit interior than charging infrastructure construction to speed up the pace, regional car pile will be further optimized, charging service platform that integrates development, accelerates the development of intelligent at the same time, can be activated at the same time the application of new energy, new energy and form a good interaction.

Liquid cooling vs. air cooling: What you need to know

Every computer, from the smallest of home theater PCs to the most hulking of gargantuan gaming rigs, generates heat during operation—heat that can kill your PC’s precious internals if you’re not careful.

While you don’t have anything to worry about if you bought your computer from a big-box retailer or straight from a manufacturer like HP, you’ll be faced with a potentially crucial decision if you’re building (or custom-buying) a fire-breathing, benchmark-eating computer: Should you chill your PC with a traditional air cooling solution or a pricier, yet more efficient liquid-cooling system? That question has many aspects to consider before you can answer it.

Cooling methods explained

The secret to harnessing the cooling power of air lies in fans—lots of fans. Your typical air-cooled PC is packed with case fans, graphics card fans, and a CPU fan or two—positioned atop a big metal heat sink—to keep your expensive components nice and frosty.

A water-cooling system, on the other hand, employs a series of coolant-filled tubes, a radiator, water blocks (the equivalent of heat sinks), and a couple of other components to keep your PC feeling refreshed. You’ll even need a few fans to push around all the water!  Our guide to setting up a liquid-cooled PC explains a basic (ha!) system in exacting detail.

Got it? Good. Defining air cooling and liquid cooling is the easy part. The trickier bit is making the decision to use one or the other. 

Air cooling

One of the great joys of using fans to cool your system is that, in a lot of circumstances, you really don’t have to do anything to create a decent cooling setup. If your system’s chassis is of the non-bargain-bin variety, odds are high that its manufacturer has already installed exactly what you need—namely, an intake fan in the front that pushes outside air over your hard drives and an exhaust fan that shoots hot air flying out of the rear of the chassis.

Graphics cards and computer processors pretty much always ship with powerful stock fans—you know, the ones that sound like a plane taking off when they roar into action. Those, combined with case fans, make up the Holy Trifecta of air cooling within a typical desktop PC.

Water cooling

Let’s start with the pleasant bits. One of the key benefits of a strong liquid cooling setup is that it allows you to cool specific system components to a greater degree than if were you to use fans—not the most applicable setup for someone running a typical stock-clock processor, but one that’s definitely of interest to anyone looking to overclock their chips a bit (or a ton).

Even if you don’t tax your rig enough to need a bigger cooling boost, a cheap self-contained water cooling loop—more on those later—can help lower your PC’s sound output. Water cooling is much quieter than stuffing your case full of fans.

There’s also the issue of space. A huge heat-sink/fan combination might perform well enough, but the best CPU coolers eat up a ton of real estate inside your case. Liquid cooling requires much less space, and it looks a lot niftier to boot. You can’t discount the cool factor of a case full of colorful, liquid-filled tubes!

Conclusion

So, which is better? Air cooling or water cooling? The answer depends on your particular usage needs.

One size does not fit all when it comes to case cooling, but most people can get by with fans alone. It’s easy, and it’s cheap. If, on the other hand, you’re an enthusiast who needs the best cooling possible for your flaming CPU and a gaggle of graphics cards, a DIY water-cooling setup is in your future. Finally, try a sealed liquid cooler if you’re considering liquid cooling either to keep your overclocked processor chilled or simply to benefit from reduced system noise.

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.