Automatic drainage device for intercooler of engine and control method

The invention discloses an automatic drainage device for an intercooler of an engine and a control method, which can effectively avoid the phenomena that a large amount of accumulated water enters a cylinder to cause engine flameout and the intercooler is frozen due to deposited water after standing for a long time in a low-temperature environment, so that the engine can be effectively protected. An air inlet pipe is arranged on one side of an intercooler body, an air outlet pipe is arranged on the other side of the intercooler body, an electromagnetic valve body, a liquid level sensor and an electric heating rod are arranged in a liquid storage tank, a temperature sensor is arranged outside the liquid storage tank, and the electromagnetic valve body, the electric heating rod, the liquid level sensor and the temperature sensor are all connected with an ECU. The liquid level sensor is used for detecting liquid level information in the liquid storage tank, the temperature sensor is used for detecting temperatur