How does home communication equipment dissipate heat?
1.Router
The router is mainly composed of memory, power supply, transmission medium (that is, cable), CSU/DSU, supplier's medium, CPU, interface, module, etc. With the increase of working frequency and working intensity, but also in order to save cost and space, routers produced by router manufacturers are getting smaller and smaller. In this case, the heat dissipation problem has become the most headache for engineers. In order to solve the router In the thermal design of routers, engineers usually use thermally conductive silicone sheets in combination with the shell to dissipate heat. Adopt thermal conductivity of 2.0W/mk; ShoreC test hardness of 35 degrees; high temperature resistance, stable work in -40~200℃ environment, good insulation and compressibility; and the thermal conductive silicone sheet solution that meets environmental protection requirements can meet the requirements. Customer product usage requirements.
2. Network set-top box
The digital video conversion box, usually called a set-top box or a set-top box, is a device that connects a TV set with an external signal source. It can convert the compressed digital signal into TV content and display it on the TV. Signals can come from wired cables, satellite antennas, broadband networks, and terrestrial broadcasts. In addition to the images and sounds that analog TV can provide, the content received by the set-top box is also capable of receiving digital content, including electronic program guides, Internet web pages, subtitles, and so on. Enable users to watch digital TV programs on existing TV sets, and conduct interactive digital entertainment, education and commercial activities through the Internet. Now people's living standards are getting better and better, and people's lives are getting richer and richer. Network TV set-top boxes The emerging products of this era are convenience, fashion, trend, and future.
At present, the quality of set-top boxes on the market is uneven, and most of them are simple in structure. When used in summer, it is easier to generate a lot of heat in the set-top box. The large amount of heat generated by the set-top box during use affects daily use, resulting in unstable video signals. Even the set-top box is burned down, causing safety hazards in the home, and the fan of the general set-top box is easy to accumulate dust.
In the internal structure of the set-top box body, the outer wall of the set-top box is provided with a signal output interface, and the outer wall of the set-top box is provided with a power interface. There is a fan brake motor, a box body is arranged on the right side of the set-top box body, a heat conduction cover is arranged on the top of the box body, a heat conduction copper pipe is fixedly connected to the top of the heat conduction cover, a first water tank is fixedly connected to one side of the box body, and one side of the first water tank is fixed A switch is connected, one side of the first water tank is fixedly connected with a spray head, the other side of the box body is connected with a second water tank, two sides of the heat conducting copper pipe are respectively fixedly connected with fins, the right outer wall of the set-top box body is provided with a heat dissipation port, and the set-top box body The bottom side surface is provided with a first movable buckle, the bottom side surface of the set-top box body is provided with a second movable buckle, and one end of the set-top box body is fixedly connected with an antenna.
At the same time, there are three set-top box fans, and the fans are evenly arranged on the heat-conducting copper pipe with the center of the right side of the heat-conducting copper pipe as the symmetry axis. The bottom of the box body is fixedly arranged on the set-top box body, and a baffle plate is arranged around the box body. The diameter of the heat-conducting cover is three to five centimeters, and a fan is fixedly connected to the bottom of the heat-conducting cover. The nozzle is set at the center of the top of the fan, and the nozzles are evenly distributed with fine holes.
If the set-top box is used in an area with high temperature all year round, it is not enough to rely on the fan to dissipate heat. Therefore, many network set-top box manufacturers reform the fan installed inside the set-top box, including heat dissipation methods, heat conduction materials, etc., to fundamentally solve the problem that the set-top box cannot work continuously The problem.
The thermal conductive silicone sheet is soft, thermally conductive and insulating, especially its compressibility is good, the thickness can be adapted to the space range of different set-top boxes, and the controllability is good. Generally speaking, if the heat generated by electrical appliances such as induction cookers, rice cookers, set-top boxes, microwave ovens, etc. cannot be exported in time, the junction temperature of the electrical appliances will be too high, which will affect the product life cycle, use efficiency, and stability. Performance, and the relationship between electrical junction temperature, operating efficiency and life. The set-top box transfers the heat of the chip to the shell through the thermally conductive silicone sheet, and dissipates heat through natural convection, so there is no need to worry about burning the set-top box because the shell is too hot. Use a soft thermally conductive silicone sheet between the main IC or high temperature component of the set-top box and the heat sink or the shell of the set-top box, which can reduce the temperature by about 18 degrees.
The thermal conductive silicone sheet fills the air gap between the heating element and the heat sink or the metal base. The flexibility and elasticity of the thermal conductive silicone sheet allows it to be used to cover very uneven surfaces. The heat is conducted from the separate device or the entire PCB to the metal casing or diffusion plate, thereby improving the efficiency and service life of the heating electronic component. The application of thermally conductive silicone sheet on the set-top box enables it to dissipate heat faster and thus the product has a longer service life.
