Heat exchanger structure and dryer

The utility model provides a heat exchanger structure and a dryer, relates to the technical field of dryers, and solves the technical problems that an existing heat exchanger cannot flexibly adjust the heat exchange efficiency according to the use environment and is narrow in application range. The heat exchanger structure comprises a first heat exchange component and a second heat exchange component, the first heat exchange component is provided with a first air duct used for exchanging heat with air, the second heat exchange component is provided with a second air duct used for exchanging heat with air, and at least part of the second air duct can enter the first air duct and can adjust the length of the part, extending into the first air duct, of the second air duct. The heat exchangerstructure is provided with the two heat exchange parts with the corresponding air flues, when the second air flue enters the first air flue, air flowing in the part, located in the first air flue, ofthe second air flue can be