Thermal solution for network set-top box

Thermal solution for network set-top box

A digital video converter box, commonly referred to as a set-top box or set-top box, is a device that connects a television to an external signal source. It converts compressed digital signals into TV content and displays it on the TV. Signals can come from cable, satellite dishes, 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 more capable of receiving digital content, including electronic program guides, Internet 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 It is the emerging products of this era that are convenient, fashion, trend and future.

network set-top box
Android TV set top box receiver with remote controler isolated on white

At present, the quality of set-top boxes on the market is uneven, and most of them have simple structures. 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 will affect daily use, resulting in unstable video signals. Even burning the set-top box, causing a safety hazard in the home, and generally the fan of the 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, the outer wall of the set-top box is provided with a power interface, one end of the power interface is fixedly connected with a first wire, the first wire is connected in series with a second wire, and one end of the second wire is connected to 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, a nozzle is fixedly connected to one side of the first water tank, a second water tank is connected to the other side of the box body, fins are fixedly connected to both sides of the heat-conducting copper tube, and a heat dissipation port is opened on the right outer wall of the set-top box body. One side surface of the bottom is provided with a first snap button, a side surface of the bottom side of the set-top box body is provided with a second snap button, and one end of the set-top box body is fixedly connected with an antenna.

Thermal solution for network set-top box

At the same time, the number of fans of the set-top box is three, 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 arranged at the center of the top of the fan, and the fine holes are evenly distributed on the nozzle.

If the set-top box is used in areas with high temperature all the year round, the fan alone is not enough for heat dissipation. Therefore, many network set-top box manufacturers have modified the fans installed inside the set-top box, including heat dissipation methods, thermal conductive materials, etc., to fundamentally solve the problem that the set-top box cannot work continuously. The problem.

thermal pad
thermal pad

The thermally conductive silicone sheet is soft, thermally conductive and insulating, especially its compressibility is good, and its thickness can be adapted to the space range of different set-top boxes, with good controllability.

Generally speaking, if the heat energy generated by household appliances such as induction cookers, rice cookers, set-top boxes, microwave ovens and other electrical appliances during normal operation 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. properties, 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.

thermal pads
thermal pads

Using a soft thermal conductive silicone sheet between the main IC of the set-top box or high temperature components and the heat sink or the shell of the set-top box can reduce the temperature by about 18 degrees.

The thermally conductive silicone sheet fills the air gap between the heating device and the heat sink or metal base. The flexible and elastic characteristics of the thermally conductive silicone sheet allow it to be used to cover very uneven surfaces. Heat is conducted from discrete components or the entire PCB to the metal enclosure or diffuser plate, increasing the efficiency and lifespan of heat-generating electronic components. The application of thermally conductive silicone sheet on the set-top box enables it to dissipate heat faster so that the product has a longer service life.

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