A fragrance dispenser for emitting fragrance into an airstream impinging on an air filter, the dispenser having a receptacle with an open end that faces toward the air filter and that has a porous diffuser layer occlusively overlying the open end of the receptacle.一種用於將芳香劑射入衝擊於一空氣過濾器上之一氣流中的芳香劑分配器,該分配器具有一含一開放端之收容器,該開放端面朝向該空氣過濾器,並且具有一閉塞地上覆於該收容器之該開放端之多孔擴散層。