DRYING APPARATUS

Provided herein is a drying apparatus, which includes at least one oven and an external circulation system for providing hot air to the inside of the oven. The external circulation system includes a heating device, an air inlet duct and a linkage damper, wherein the air inlet duct comprises a high-temperature air duct and a low-temperature air duct, the outlets of which are connected to the oven through the linkage damper, and the inlets of which are communicated with the external air through a fan. The heating device is arranged on a pipeline of the high-temperature air duct, and an airflow ration of the high-temperature air duct to the low-temperature air duct can be controlled by adjusting the linkage damper. The oven can realize the temperature adjustment, and the adjustment is simple and results in high precision in temperature control.