Temperature control device in chassis

The invention discloses a temperature control device in a chassis. The temperature control device belongs to the technical field of electronics, and comprises a temperature detection circuit, a signalprocessing circuit, an automatic control circuit, an alarm circuit and a power supply circuit, wherein the temperature detection circuit is used for converting temperature in the chassis into a voltage signal; the signal processing circuit is used for analyzing and processing the voltage signal output from the temperature detection circuit, so as to determine a temperature T in the chassis and send out a corresponding control signal; the automatic control circuit is used for controlling a fan to operate when b< =T, controlling the fan to continue operation when the temperature T in the chassis is reduced to c