How do servers and networks dissipate heat
Network switch
With the rapid development of science and technology, our society has entered the information age. In this society, the Internet has become an indispensable part of people's lives. With the rapid development of the information age and the gradual popularity of cloud services, the amount of data storage in all walks of life is increasing rapidly due to the popularity of cloud services. Large-capacity expansion of servers also brings more demand for switches. I believe everyone knows routers, but most people generally don’t know what it is when it comes to network switches. What can it do for our network?
The network switch is an important component for connecting servers and network equipment to construct a data center. However, due to the high density of network equipment caused by the popularization of cloud services, the surge in the number of connected devices makes the load on the switch even greater. The new switch faces the problem of balancing performance improvement and power consumption reduction.
The industrial switch integrates the MAC switch module, PHY interface chip, main control chip, memory and other devices. Because excessively high temperature has a fatal impact on industrial switches, when designing such products, in addition to equipment components to choose industrial components with a wide temperature range, more attention should be paid to the thermal design of the equipment. In order to meet the reliability application requirements of industrial-grade switches, most of the whole machines adopt fanless heat dissipation design. For chips with a relatively large amount of heat, thermally conductive silicone gaskets and thermally conductive phase change materials can be used to fill the gaps between the contact surfaces to form a heat conduction channel from the chip surface to the shell, so as to ensure that the chip works in a safe temperature range and the switch is in a high temperature environment Down, work reliably and safely. The heat dissipation structure of the switch includes a switch shell and a circuit board: the circuit board is provided with an upper thermal pad, a metal heat sink is provided on the thermal pad, and a thermal pad is provided under the circuit board. The thermal pad is connected to the shell of the switch. The inner surface is attached; the thermal pad is a certain elastic object, which can effectively ensure that the thermal pad is closely attached to the inner surface of the switch shell; part of the heat generated by the circuit board is transferred to the metal heat sink through the upper thermal pad and then diffused to the switch Inside, it is diffused into the air through the switch shell, and a part of the heat is transferred to the switch shell through the lower thermal pad and then diffused into the air; this solution is especially suitable for small switches, which can effectively avoid the increase in volume caused by the installation of cooling fans. Problems such as increased cost and easy damage.
Thermally conductive silicone gaskets are mainly used for heat conduction and heat dissipation between the motherboard and the housing. The main purpose of selecting thermal silica gel gasket is to reduce the contact thermal resistance between the surface of the heat source and the contact surface of the heat sink. The thermal silica The contact surface between the heating source and the radiator is in better and full contact, and real face-to-face contact is achieved, and the temperature response can reach the smallest possible temperature difference; the thermally conductive silicone sheet not only has insulation properties, but also has the effect of shock absorption and sound absorption .
Computer server
People often use network technology in their daily work and life. It can be said that the current society cannot do without communication networks. In ancient times, the connection between the South and the North could only be done through letters. If the distance is far, it may take several months to arrive. , And now people connect with each other through the Internet, ignoring distance and time. As a node of the network, a computer server that stores and processes 80% of the data on the network needs to work uninterrupted 24 hours a day, 7 days a week.
The composition of computer servers is basically similar to that of microcomputers, including processors, hard disks, memory, system buses, etc., which are specially formulated for specific network applications. Therefore, computer servers and microcomputers are in terms of processing capacity, stability, reliability, security, There are big differences in scalability and manageability.
Computer server is a kind of high-performance computer. Network terminal equipment such as microcomputers in homes and enterprises must go online to obtain information, communicate with the outside world, and entertain. Leading these devices. A long-term and efficient computer server is a must-have for an enterprise. There are many factors that affect computer servers, and heat dissipation is one of the main factors. Computer servers are high-performance computers, and they are also very power-consuming machines. They emit a lot of heat. Some large enterprises will set up computer servers. An exclusive air-conditioned machine room. Heating of computer server equipment is a widespread phenomenon in daily life, mainly because electric energy cannot be completely converted when it is converted into target energy.
Most of the energy will be lost in the form of heat, which leads to heat generation during operation of machinery and equipment. Air is a poor conductor of heat, and the heat transfer efficiency will be reduced when passing through the air, resulting in poor heat dissipation.
Thermal conductive materials are used to solve the problem of low heat transfer efficiency. There are many kinds of thermal conductive materials, such as thermally conductive silicone sheet, thermally conductive silicone grease, thermally conductive gel, thermally conductive double-sided adhesive, thermally conductive adhesive, thermally conductive silicone cloth, etc. All kinds of thermal conductive materials have their characteristics and areas of expertise. Although they have various differences, their purpose is to improve heat transfer efficiency.
In the internal structure of the computer server, there is a gap between the heat source and the radiator. Even if it is two smooth and flat surfaces, there are still some pits, and there are gaps when the two are attached. There is a lot of air in the gap. Therefore, the efficiency of heat transfer will be reduced, and the thermal conductive material is to fill the gap between the two, filling large and small pits, reducing the contact thermal resistance, so that the heat source and the radiator can be in close contact, thereby improving the heat dissipation effect, so as to ensure the machine The equipment runs stably for a long time.
