Device for dehumidifying a closed casing

Device for dehumidifying a closed casing, characterized in that it comprises at least:

• a box defining a chamber comprising at least one inlet and one outlet, the inlet being configured so that the chamber communicates with the interior of the closed casing and the outlet being configured so that the chamber communicates with the exterior of the closed casing;
• a heating module able to be controlled to generate heat;
• a desiccant configured to adsorb moisture inside the chamber when said desiccant is not heated by the heating module and to return adsorbed moisture by desorption when said desiccant is heated by the heating module;
• at least one mobile plug able to be moved alternately to at least a first position and a second position, said mobile plug being configured to open the inlet and close the outlet in the first position and to close the inlet and open the outlet in the second position;
• a bias spring configured to move the mobile plug to the first position when the heating module does not heat the desiccant;
• and
• a shape memory alloy spring able to be heated by the heating module at the same time as the desiccant, said shape memory alloy spring being configured to move the mobile plug in the second position when the heating module heats the desiccant,
• the mobile plug comprising:
• an adsorption flap configured to open the inlet when the mobile plug is in the first position and close the inlet when the mobile plug is in the second position;
• and
• a desorption flap configured to close the outlet when the mobile plug is in the first position and open the outlet when the mobile plug is in the second position.