Mistake 1: copper radiator (or aluminum radiator) is not corrosive. Generally speaking, copper is better than steel in corrosion resistance, but in a certain environment, copper radiator will also have corrosion. For example, if there is too much sludge and sulfur in the system, or the selected copper surface is attached with carbonization layer, etc., it will cause corrosion of copper radiator. In addition, due to the different corrosion principles of materials, although the aluminum radiator has strong anti-oxidation corrosion ability, it is easy to suffer from alkali corrosion and chloride ion corrosion, so when the water quality of a heating system is alkaline (pH value is higher than 8), or the chloride ion content is high (salt content is large), the radiator will have the potential of corrosion and water leakage.
Mistake 2: the leakage of heat collection is the problem of radiators. In this heat collection season, several leakage accidents of radiators were exposed by the media, which also attracted the attention of the heat collection radiator Committee of China Building Metal Structure Association and made a positive response: the association organized the heads of enterprises of brand radiators such as Zehnder, jintage, Florence, Ritter, etc. to discuss "radiator longevity" Life and system problems "and find out some" symptoms "of radiator leakage. Experts at the meeting thought that the water quality of heat supply is complex or the problem of mixed installation and installation of radiators may lead to leakage or non heat of heat recovery radiators. In addition, in the non heating season, the heat sink should be full of water for maintenance, otherwise it is easy to bury hidden dangers. "Draining the water in the heating system in non hot season will cause rapid corrosion of steel radiator, boiler, water pump and valve, and also cause blockage of radiator temperature control valve, heat meter and other products." According to an expert.
Mistake 3: the product wall thickness (or no weld or smooth inner wall) is not afraid of corrosion. The cast iron radiator is not easy to be damaged due to corrosion resistance, not due to wall thickness. In recent years, some small domestic manufacturers try to solve the problem of anti-corrosion of steel radiators by increasing the wall thickness, which is wrong. Because the corrosion of steel radiator is local corrosion of small holes, not uniform corrosion. If according to their theory, if the 1.3mm steel plate is corroded and perforated in 3 years, then the 2.0mm steel plate will surely be corroded and perforated in 5 years, which is also far from meeting the user's requirements for radiator life. In addition, some radiator manufacturers in the market are vigorously promoting their radiator products "no weld, clean and smooth inner cavity" and so on. In fact, it can not play a role in the anti-corrosion of radiator. Because the corrosion of steel radiator does not occur on the weld, this is because the corrosion of steel radiator is oxygen corrosion, so "no weld or smooth inner cavity is no corrosion".
Mistake 4: internal coating is anti-corrosion in the radiator market, the sales staff must be called "anti-corrosion". So far, there are only two types of internal coating anticorrosion in domestic radiator Market: "organic coating" and "inorganic coating". Generally speaking, the cost of inorganic coating is higher than that of organic coating, the process is more complex, the process requirements are more strict, and the anti-corrosion effect is better than that of organic coating. Of course, there are also two processes in the market. For example, the second generation anti-corrosion products produced by Beijing Zehnder are based on the inorganic layer plus an organic layer, double coating, multiple protection, and more security.
Mistake 5: the more fancy and weird the product, the more decorative and unique the radiator will increase the decoration and meet people's personalized needs, but it is not beautiful to be too fancy and weird. For example, the market is full of "vase type", "Violin type" and "moon type" radiators, whose workmanship is rough, and it is difficult to match with other furniture harmoniously in the room. There are also thin and excessively curved pipes that will obviously affect their heat dissipation function.
Mistake 6: where to buy famous brand products, consumers should choose powerful large enterprises and famous brand products when purchasing hot gas and accessories, and the place of purchase should be in large building materials supermarkets and regular brand stores. Don't be greedy for cheap, or to save money, buy radiators in the neighborhood, street shops or private hands. According to the data reflected by many manufacturers, it is the most easy purpose to buy radiators at the temporary sales point in the community: consumers have problems with the radiators at home, which are reflected to the manufacturers, but the manufacturers find that the brand of radiators is fake, or the products that flow into the market through illegal circulation channels.
The above contents are sorted out according to the problems encountered in the actual work of the trainees for reference. If there are any problems, please communicate and correct them in time.
Integrated circuits are widely used in computer components. As we all know, high temperature is the enemy of integrated circuits. High temperature will not only lead to unstable operation and short service life of the system, but also may burn some components. The heat that causes the high temperature does not come from outside the computer, but from inside the computer, or inside the integrated circuit. The function of the radiator is to absorb the heat and then radiate it to the inside or outside of the computer case to ensure the normal temperature of the computer components. Most radiators absorb heat by contacting with the surface of the heating parts, and then transmit the heat to the distance through various methods, such as the air in the case, and then the case transmits the hot air to the outside of the case to complete the heat dissipation of the computer. There are many kinds of radiators, such as CPU, graphics card, main board chipset, hard disk, chassis, power supply and even optical drive and memory. These different radiators can not be mixed, and the most commonly contacted one is CPU radiator.
Heat sink material refers to the specific material used by the heat sink. The thermal conductivity of each material is different, from high to low, which are silver, copper, aluminum and steel. However, if you use silver as the heat sink, it will be too expensive, so the best solution is to use copper. Although aluminum is much cheaper, its thermal conductivity is obviously not as good as copper (only about 50% of copper). The common material of heat sink is copper and aluminum alloy, which have their own advantages and disadvantages. Copper has good thermal conductivity, but the price is expensive, the processing is difficult, the weight is too large (many pure copper radiators exceed the weight limit of CPU), the heat capacity is small, and it is easy to oxidize. However, pure aluminum is too soft to be used directly. Only the used aluminum alloy can provide enough hardness. The advantages of aluminum alloy are low price and light weight, but its thermal conductivity is much worse than that of copper. Some radiators have their own advantages. A copper plate is embedded in the base of the aluminum alloy radiator. For ordinary users, the use of aluminum heat sink has been enough to meet the cooling needs.
The heat dissipation mode refers to the main mode of heat dissipation of the radiator. In thermodynamics, heat dissipation is heat transfer, and there are three ways of heat transfer: heat conduction, heat convection and heat radiation. When matter itself or when matter contacts matter, the transfer of energy is called heat transfer, which is the most common way of heat transfer. For example, the way that the base of CPU heat sink contacts with CPU directly to take away heat belongs to heat conduction. Thermal convection refers to the heat transfer mode that the flowing fluid (gas or liquid) moves the tropics. In the cooling system of computer case, it is more common that the cooling fan drives the flow of gas in the "forced thermal convection" cooling mode. Thermal radiation refers to the transfer of heat by radiation, the most common is solar radiation. These three ways of heat dissipation are not isolated. In the daily heat transfer, these three ways of heat dissipation occur at the same time and work together.
In fact, any type of radiator basically uses the above three heat transfer methods at the same time, but with different emphasis. For example, the common CPU air-cooled radiator, the CPU heat sink directly contacts with the CPU surface, and the heat on the CPU surface is transferred to the CPU heat sink through heat conduction; the air flow generated by the cooling fan takes the heat off the CPU heat sink surface through heat convection; the air flow in the chassis also takes the heat from the air around the CPU heat sink through heat convection until outside the chassis; at the same time, all parts with high temperature It will radiate heat to the parts with low temperature. The heat dissipation efficiency of the radiator the heat conductivity of the radiator material, the heat capacity of the radiator material and the heat dissipation medium, the effective heat dissipation area of the radiator and other parameters are related. According to the way of taking heat away from the radiator, the radiator can be divided into active cooling and passive cooling. The former is common for air-cooled radiator, while the latter is common for radiator. Further subdivision of heat dissipation can be divided into air cooling, heat pipe, liquid cooling, semiconductor cooling, compressor cooling and so on.
