Electrical control heat dissipation device and NTC thermistor.SMD Photosensitive sensor

　　Electrical is the general term for disciplines or engineering fields such as electricity production, transmission, distribution, use, and electrical equipment manufacturing. With the development of electrical equipment automation, more and more electrical equipment has emerged, and the heat dissipation of electrical equipment has also received attention, thereby promoting the progress of heat dissipation systems. The heat dissipation device of electrical equipment is also very important.

　　The electrical control heat dissipation device is equipped with NTC thermistors, springs, traction ropes, electric wire wheels, sliding plates, cold air fans, fan blades, rotating shafts, and motor structures. When it is in use, the heat dissipation window is opened to dissipate the heat generated by the equipment through the heat dissipation window. Whenever the internal temperature of the box reaches a certain level, the resistance value in the negative temperature coefficient thermistor decreases, which increases the current passing through the motor and causes the motor to be in an open state. This then drives the shaft to rotate, causing the fan blades to rotate and blow out cold air, cooling the inside of the box. At the same time, the electric wire wheel operates through the spring The cooperation between the traction rope and the electric wire wheel causes the sliding plate to move left and right on the chute, thereby expanding the cooling range of the cold air fan. Once the temperature inside the box drops to a certain extent, the resistance value in the negative temperature coefficient thermistor increases, which reduces the flow of electricity through the electric machine and causes the motor to be in a closed state, causing the cold air fan to stop working, thereby saving power resources and solving the problem when opening the device, The refrigeration mechanism will work, but at certain times, it only needs to dissipate heat through the heat dissipation holes, avoiding the problem of wasting resources.

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