Improved adsorption type drying machine

The utility model discloses an improved adsorption type drying machine. The top ends of two adsorption towers are connected with each other through a pipeline provided with a three-way one-way valve. A valve body of the three-way one-way valve is provided with an air outlet, a left air inlet and a right air inlet. A spring is installed in the valve cavity, the left end and the right end of the spring are each provided with a valve element capable of sliding left and right in the valve cavity, and each valve element is of a hollow structure with the open inner end and the closed outer end. The inner end of the valve element makes contact with the spring, and an air channel is formed between the outer end and the air inlet. The diameter of the outer side portion of the valve element is smaller than that of the valve cavity, and the outer side portion is provided with a valve element side wall air hole in a radial through hole mode. The air outlet is connected with an exhaust pipe. According to the utility model