Activation device and odor removal device including same

An odor removal device comprising:

• a case;
• an activation device installed in the case and coming into contact with an object to activate surrounding materials according to a dielectric barrier discharge principle;
• and
• an odor sensing unit installed in the case and coming into contact with the object to detect an odor, wherein
• the activation device includes:
• a dielectric having an outer surface exposed to an outside and provided as a curved surface and an inner surface facing the outer surface;
• and
• an electrode positioned inside the dielectric in which power is applied to the electrode, and having an outer surface facing the inner surface of the dielectric,
• wherein a thickness of the electrode gradually increases from an edge region to a center region and a hole or a groove is formed inwardly from the outer surface of the electrode,
• wherein a region of the outer surface of the electrode where the hole or groove is formed is a non-contact region that does not contact the inner surface of the dielectric, and a remaining region is a contact region that is in contact with the inner surface of the dielectric.