To solve the problem that a dryer employing a heat pump tends to be slow in startup, and also, to make effective use of surplus heat that is inevitable in heat pump drying.
The dryer includes: an exothermic reaction container 6 containing calcium chloride 17, which is provided at the downstream side of a condenser 2; and a condensation container 7 containing water 16, which is provided above the exothermic reaction container 6. The dryer is configured to open, when drying starts, a condensed water pipe open/close valve 14 to dissolve the calcium chloride 17 with the water 16, and utilize the generated heat to compensate for the lack of heat at the start of drying. When the drying progresses, the water gradually evaporates by the surplus heat, and returns to the condensation container to be condensed into water and used in the next drying.
Daisuke Nagano
Kentaro Fujii