The invention relates to the field of heating ventilation air conditioners, in particular to a novel heat exchange dehumidification structure and method. By means of a self-heating principle, dehumidification and heating of outlet air by inlet air are achieved, and separate control over the temperature and the
humidity can be easily achieved. According to the structure and the method, 1, single-cold-source self-heating structure and method are utilized, other energy reheating sections are not needed, the total
cooling temperature difference of a dehumidification part is close to zero, and
energy consumption is greatly reduced; and 2, the structure is simple, two
surface cooling sections are arranged, the temperature and the
humidity can be controlled separately, and the
failure rate is low. Four listed structures and methods are protected, and the principle is explained with reference to the listed several structures of an A-structure plate-type, a B-structure liquid-circulation-type,a C-structure rotating-wheel-type, and a D-structure heat-
pipe-type; and as long as the self-heating principle is used, the temperature and the
humidity are separately controlled without reheating
energy consumption, and the content is protected.