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usheenthermal
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The development of the modern chemical industry is inseparable from the existence of electricity. It is necessary to use electricity to drive the operation of machines from large factories to small individual workshops. If you use various electrical equipment, it is naturally inseparable from the heat generation. And this This phenomenon cannot be avoided. Electrical equipment generates heat when it is running, because energy loss will occur during energy conversion, and heat will be generated when current passes through the resistor. Heat in the space inside the equipment is not easy to circulate, so it is easy to cause local temperature rise, so that electronic components will be affected by excessive temperature. Performance and service life.
Most people have experience in assembling a computer. When installing a computer CPU, you need to lightly apply a layer of silicone grease on the CPU in advance, and then install the cooling fan directly. If silicone grease is not applied, the temperature of the CPU during use It is still above the safe range, so silicone grease needs to be applied between the cooling fan and the CPU. Although the surface of the CPU and the cooling fan contact sheet are smooth and flat, there is a gap between the two bonding, and the heat transfer will be hindered, so that the heat cannot be effectively dissipated to the outside. The function of the thermal grease is to pass Fill the gap between the two and fill the gap with air, thereby reducing contact thermal resistance and improving thermal conductivity
With the development of science and technology, discrete graphics cards that used to be regarded as high-end accessories have now become popular in most computers, especially personal assembled computers. The performance of discrete graphics cards determines the computer's graphics processing capabilities. Currently sold and developed on the market 3A masterpieces and some image and video rendering require high-performance discrete graphics cards. In electrical equipment, the higher the performance of the equipment, the higher the heat generated, and the higher the heat dissipation configuration required. A large amount of heat will be generated when the computer is running. People often say that the computer burns mainly to describe a certain computer. Components burned due to excessive temperature, and graphics cards, CPUs, motherboards, hard drives, etc. are all key areas.
People often ignore their common problems when using various electrical equipment: fever, such as large servers, security monitoring equipment, assembly line production robots, logistics robots, etc. often need to work 24 hours a day. If the heat dissipation is not done well, It may cause electrical equipment to malfunction or even burn. Electrical equipment will generate a lot of heat when used, because when current passes through the resistor, it will generate heat. The greater the power of the electrical equipment, the more heat it generates. The internal space of the equipment is not easy to circulate heat, and the heat is easy to accumulate, making the local temperature too high. , And high temperature will cause the failure of electronic components, and the high temperature will accelerate the aging rate of the material, so it is necessary to dissipate heat in time.
The heat conduction problem of equipment is the most common phenomenon, such as heat generation of various consumer electronic products, household appliances, industrial machinery, etc. When current passes through the resistor, heat will be generated. Therefore, the operation of electrical equipment must generate heat. of. Temperature is one of the key factors that affect the performance and service life of the equipment, and high temperature will cause the temperature-sensitive electronic components to fail. At high temperatures, the material aging of the equipment will accelerate, which may cause fires in severe cases. In order to ensure the operation of the equipment, a heat dissipation system is necessary.
The problem of mobile phone heating has become a trouble that people often encounter in daily life, and if it is serious, it may cause the mobile phone to ignite spontaneously, so the heat dissipation problem of the mobile phone is the focus of the engineers to solve. Mobile phone heating is unavoidable, because in reality, the energy conversion process is often accompanied by loss, especially the conversion of electrical energy into other target energy is heavier. The operation of mobile phones requires batteries to increase power, and heat will be generated when current passes through the resistor. , And the amount of heat is related to the power of the device, which is why the heat dissipation requirement of 5G mobile phones is much higher than that of 4G mobile phones.
Why can't the radiator directly contact the heat source to dissipate heat, but need to fill the medium between the two? When assembling a computer, people usually apply thermal paste on the surface of the CPU before installing the cooling fan above the CPU, and then install the cooling fan, because there are gaps between the radiator and the heat source, there are many holes and air in the gap, and the heat is The transmission process will be hindered, thereby reducing the heat dissipation effect.
When the machine and equipment are running, the heat is generated when the current passes through the resistance. The heat is not easy to circulate in the interior, which can easily lead to local temperature rise and affect the equipment. It is necessary to install a radiator above or near the heat source to guide the heat from the surface of the heat source to the outside, so as to reduce its temperature.
Thermal conductive material is a kind of new material to solve the problem of heat transfer equipment, machinery and equipment usage will fever is the common fault of the power devices, want to solve the problem of heating is impossible, because in reality is accompanied by a loss of energy conversion, this part of the loss of a large share of energy in the form of heat to the outside, if there is no in time will lead to the external heat, The machine equipment may cause performance damage or even crash due to high temperature.
The heat generated by electrical equipment during operation is mainly because heat is generated when current passes through the resistor. The heat does not flow easily inside the electrical or electronic product, so it is easy to increase the local temperature. It is necessary to install a radiator to guide the heat emitted by the heat source to the radiator , In order to reduce the temperature.
The heat conduction problem is one of the key solutions in the field of thermal management today. Electrical equipment or machinery will generate heat during operation. Because the external current passes through the resistor, it will generate heat. The internal space of the equipment is not easy to circulate heat, which will easily lead to an increase in temperature. The performance and service life of the equipment.
All kinds of electronic products and electrical equipment fill people’s lives and work. The convenience and efficiency of electrical equipment make people deeply dependent on them, just like the status of mobile phones in people’s hearts. In addition to mobile phones, like There are many machines driven by electric energy in large-scale machine tools, electroplating fields, pure electric vehicles, etc., and they also have inevitable problems.
The contact surface of the cooling fan is attached to the surface of the CPU. The excess heat of the CPU will be transferred to the radiator through the contact between the two. However, there is a gap between the contact surface of the radiator and the CPU, even though both are smooth and flat. It is necessary to use a thermal conductive material similar to thermal grease to fill the gap between the two to eliminate air, reduce the contact thermal resistance between the two, and improve thermal conductivity, so as to ensure that the CPU will not malfunction due to excessive temperature during operation.
The thermal gap filling material is a new type of material that solves the heat transfer problem of equipment or electronic products. With the development of science and technology, the development trend of miniaturization, high integration, light and thin dexterity makes the product’s heat dissipation requirements higher, and the general direct Contact heat dissipation can no longer meet its heat dissipation requirements, so the emergence of thermal gap filling materials provides a solution to its heat conduction problem. There are many kinds of thermal gap filling materials, such as silicone thermal film, silicone oil-free thermal pad, thermal gel, thermal conductive silicone cloth, thermal grease, thermal phase change film, carbon fiber thermal pad, etc. Most of the thermal gap filling materials It is made with silicone oil as raw material. Of course, some products that are sensitive to silicone oil or require high operating environment require the use of heat-conducting materials that do not contain silicone oil.
Many electrical equipment and electronic instruments have a prescribed voltage. When current passes through a resistor, heat is generated. The heat is not easy to circulate inside, resulting in an increase in temperature and affecting the equipment. High temperature will cause temperature-sensitive semiconductors, electrolytic capacitors, and processors. When electronic components fail, the aging speed of materials will be accelerated under high-temperature environments, so heat needs to be directed to the outside to reduce the temperature of the equipment.
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