Patent ID: 7050707

Claim:
A heater device applied in a desiccant rotor dehumidifier having a heat-exchanger, a desiccant rotor, a first fan and a second fan for supplying regeneration hot air to said desiccant rotor, comprising: a case having an air inlet receiving airflow from said second fan, an air outlet mounted adjacent to a portion of said desiccant rotor, and a cavity formed between said air inlet and said air outlet; at least a heating element, located in said cavity and adjacent to said air outlet; and an insulative plate installed in parallel to said heating element and parting said heating element with said air inlet, and said insulative plate is formed with a plurality of via holes suitably distributed for said airflow coming from said air inlet passing through, being heated by said heating elements and evenly passing said desiccant rotor through said air outlet.