Ventilating and heat-radiating device of indoor transformer

The utility model discloses a ventilating and heat-radiating device of an indoor transformer. The ventilating and heat-radiating device comprises a microcontroller, wherein an input end of the microcontroller is connected with a temperature sensor and a temperature setting device respectively; and an output end of the microcontroller is connected with an air curtain motor, an axial flow fan and an air curtain fan respectively. The temperature sensor is a platinum resistor temperature sensor. According to the ventilating and heat-radiating device, the temperature of a,main transformer chamber can be controlled by adopting a fuzzy PID (Proportion Integration Differentiation); the ventilating amount of the main transformer chamber is adjusted through the deviation between an actual room temperature and a set temperature value so as to keep the indoor temperature of the main transformer chamber within a set value range, so that the transformer can be operated normally and the service life loss and even faults, which are caused by over-temperature operation, can be avoided.