Derivative-free embedded negative ion releaser

The utility model discloses a derivative-free embedded negative ion releaser, and relates to the technical field of negative ion releasers. The negative ion releaser comprises a mounting box, a cover plate and a negative ion releaser body, a fixing assembly is arranged in the mounting box, the negative ion releaser body is located on the fixing assembly, and a shielding assembly is arranged on the outer side of the cover plate; a sliding block drives a shielding plate to move into a containing groove, a through opening is exposed, a limiting plate is positioned through a positioning rod, the shielding plate is driven to reset through the elastic force of a first spring, the shielding plate seals the through opening, in this way, the situation that dust is accumulated to affect the release effect can be avoided, and therefore the purpose of convenient protection is achieved; the limiting block is moved into the first groove through the extrusion force of the anion releaser body on the limiting block, the reset