Heat exchanger blocks up detection device

Heat exchanger blocks up detection device, including hot air fan, hot air fan passes through pipeline and air heat exchanger import intercommunication, air heat exchanger's export and cylinder import intercommunication, cylinder export and hot air fan import intercommunication, have a pressure difference switch in that air heat exchanger both ends are parallelly connected, the air heat exchanger entry end is connected to pressure difference switch's malleation, and the air heat exchanger exit end is connected to the negative pressure, pressure difference switch is connected with the controller electricity, pressure difference switch's the pressure differential that triggers sets up to 100MPa, the controller is the PLC controller, the controller is connected with alarm device, the pipeline is hot air conduit. The utility model discloses whether simple structure, function practicality block up through detecting the poor heat exchanger that detects of heat exchanger both ends hot blast pressure, whether need timely clearance to make radiator normal operating, heated air circulation reaches and stabilizes the state in the desiccator, has guaranteed the controllability of interior tobacco leaf moisture of desiccator and temperature, improves product quality.