The heat dissipation of the consumer electronics
Wireless charger : Wireless charging technology breaks the traditional connection line charging. It is a wireless charging technology that uses smart power transmission to improve the efficiency and convenience of charging. In recent years, wireless charging of mobile phones has been widely recognized, and the usage rate is increasing. High, once became a hot product in the mobile phone charging industry.
Wireless charging works by the principle of electromagnetic induction. Since it is a magnetic field cutting method, it will inevitably generate heat. Because of its small size, the operating temperature of the internal electronic components of the wireless charger needs to be solved first. The heat not only affects the efficiency of the wireless charger, but also conducts heat to the mobile phone. In order to better dissipate heat, it is necessary for the wireless charging shell to use metal material instead of plastic material as much as possible, and the thermally conductive silicone gasket provides its heat dissipation solution and solves this problem.
In order to make the heat dissipation efficiency better, the bottom of the wireless charger is generally made of a metal material with a thermal silica gel shock-proof pad, which can lay a good foundation for the heat dissipation of the internal electronic components, and can also achieve the effect of anti-skid, shock-proof and not easy to wear.
In the part of the internal coil of the wireless charger, this part includes the part where heat is concentrated in the middle. Therefore, a main temperature probe is installed in the middle of the coil to ensure that the operating temperature of the charger is within a safe temperature range.
Remove the screws of the coil metal substrate, and you can see the internal structure of the bottom shell of the product. The bottom shell is made of integral metal, which is also the key to heat dissipation. The use of metal is to better pass the heat inside the product through the bottom. The shell is conducted to the outside, so that the internal working temperature is always treated in a safe state, thereby delaying the service life of the product.
Since the wireless charging circuit board is connected to the bottom case, all the components are concentrated on one side of this PCB. The circuit board is an irregular whole, so there is no way to directly and seamlessly connect with the bottom case. The bottom shell is pasted with a thermal conductive silicone gasket and conductive foam to fill the gap between the bottom shell and the circuit board, so that the heat of the circuit board is guided to the bottom shell through the thermal conductive silicone gasket and conductive foam to dissipate it, which can also be used To the role of electromagnetic shielding.
Driving recorder
High temperature is the enemy of integrated circuits. It will not only cause unstable operation of the equipment, shorten the service life, and even cause the equipment parts to burn out. If it is a portable electronic device, it will also cause harm to the human body. The heat that causes high temperatures comes from inside the electronic device, or inside the integrated circuit. The function of the heat dissipating component is to absorb the heat and radiate it to the inside or outside of the equipment to ensure that the temperature of the electronic components is normal.
Faced with the complex road conditions and the situation where the masters of collisions cannot be prevented, the 4G driving recorder has become an intelligent product for car owners to record driving videos. Especially now many recorders are equipped with 1080P ultra-high-definition video recording, and they can drive during work. The recorder keeps recording, the main device has a large amount of processing data, and the chip is in a high-speed operation state, and the amount of heat emitted is also very large. If the key components are not heat-dissipated, the recorder will stop recording, restart, or even burn.
In particular, many driving recorders are hung on the front windshield and exposed to the sun. After a long period of time, they will “dead” in the sun, and will become hot and crash as soon as they are turned on. What should I do if the driving recorder freezes due to fever? Then the problem of heat dissipation of the recorder needs to be solved in the product design plan, and the application of thermally conductive silicone sheet is the current mainstream solution. You may think that it’s no problem if I buy a light-fast and high-temperature dash cam. The key is to prescribe the right medicine. The most fundamental thing is to start with the heat dissipation structure inside the dash cam and choose a suitable thermal silica gel. Chip to solve this problem of heat dissipation.
The main function of the thermal conductive silicone sheet is to conduct heat to the main components to cool down, and to dissipate heat for the 4G driving recorder to ensure normal operation. The cooling principle of the thermal conductive silicone sheet is to conduct the heat of the DSP main control chip and DDR2 chip of the driving recorder to the shielding cover, and then radiate the heat to the air through the shielding cover and conduct heat dissipation through the grounding layer of the motherboard.
