What is the cause of the infrared camera hot?

The problem of heat dissipation in infrared cameras has been around for a long time, which is a problem that many manufacturers have headaches. Shenzhen Xiangfei Yang Party explained that the biggest power consumption of infrared cameras comes from infrared lamps. Many manufacturers are pursuing night vision effects and deliberately increasing the power of infrared lamps to achieve good video monitoring at night. According to industry insiders, the efficiency of converting LED light from electric energy to light energy is only 25%, and simply increasing the operating current for irradiation longer distances can only be counterproductive. The other 75% of electrical energy is converted into heat, which leads to its heat. If it is raised, if the heat is not discharged for a long time, it will not only damage the infrared lamp itself, but also affect the life of the camera CCD. Therefore, the heat dissipation problem of the infrared camera has not been completely solved yet, but many manufacturers have also made corresponding improvements to this problem.

Shi Lina, product engineer of Tianjin Yaan Electronic Technology Co., Ltd. said that the use of infrared lamps requires special attention in structural installation and circuit design. Because the heat is rising, if the infrared lamp is installed lower, it will cause the heat to rise to affect the camera work, so the LED light should be installed relatively higher; in addition, the infrared light is used in the circuit design, using the infrared light to turn on the camera and the day and night. The conversion function linkage control mode automatically turns on the infrared light when the camera is switched to the night mode, compensates the image brightness of the camera in the night mode, and improves the sharpness of the image. This is also a very important test for the circuit design of the manufacturer.

It is also the practice of some manufacturers to isolate the infrared lamp from the CCD. Zhang Yukun, authorized design engineer of Guangzhou Meite Bell Electric Technology Co., Ltd., said that the company uses two glass plates to isolate the CCD, lens and infrared lamp from each other. The iron ring is used in the middle and the iron ring is protruded, so that part of the heat can be dissipated. Can reduce the ambient temperature at which the camera works.

In addition, some manufacturers add heat sinks or fans to the infrared camera. For example, Wang Qiang of Jiaxinjie can install a layer of aluminum substrate under the infrared light board, and use the thermal conductivity of the aluminum substrate to fully conduct heat to the outer casing. In response to this, Huang Yizhe, manager of R&D department of Shanghai Kentong Electronics Co., Ltd. explained that the previous infrared light board uses a glass fiber board with a low thermal conductivity, and the aluminum substrate currently used has better thermal conductivity and is installed by infrared light. On the aluminum substrate, heat can be transferred to the aluminum substrate through the infrared lamp holder to dissipate heat. The infrared camera mostly uses Sony CCD, and the maximum temperature of the CCD is 65 °C. If the heat emitted by the infrared lamp does not exceed 65 °C, the camera will not be damaged. Therefore, the use of high-quality infrared lamps is the fundamental solution to the problem of heat dissipation.