Scent air purifier capable of replacing case thereof

1. A scent air purifier comprising:

a body including an accommodation chamber, a receiving groove, a first vent, wherein the accommodation chamber is defined in the body, the receiving groove is located above the accommodation chamber, and the first vent is formed between and communicates with the accommodation chamber and the receiving groove;

a fan accommodated in the accommodation chamber;

a filter element connected below the accommodation chamber of the body and communicating with air from an external environment outside the body so that the fan delivers the air to flow through the first vent and the receiving groove, after the fan draws the air from the external environment;

a holder is connected with a lower end of the body;

a circuit control unit housed in the holder and electrically connected with a power source and the fan; and

a case, a support loop, and multiple tabs, wherein the case includes a second through orifice formed on a side of the case, and the multiple tabs are arranged around a peripheral side of the support loop, wherein the case is hollow, the support loop is fitted on an outer wall of the body, when the case covers on the outer wall of the body, an inner wall of the case is detachably retained with the multiple tabs of the support loop.

2. The scent air purifier as claimed in claim 1 , wherein the body further includes a first through orifice defined between an upper end of the accommodation camber and the receiving groove and communicating with the accommodation chamber.

3. The scent air purifier as claimed in claim 1 further comprising multiple clean meshes arranged around an outer wall of the filter element; multiple fixing elements, and each of the multiple cleaning meshes including a housing trench defined inside an outer wall of each cleaning mesh and accommodating the multiple fixing elements, wherein two ends of each of the multiple fixing elements fix the filter element.

4. The scent air purifier as claimed in claim 1 further comprising multiple circuit boards and multiple light emitting elements respectively arranged on the multiple circuit boards, wherein the multiple circuit boards are electrically connected with the control circuit unit and the multiple light emitting elements individually; the multiple circuit boards are housed in the accommodation chamber of the body, and the body or/and the case are made of transparent material or translucent material.

5. The scent air purifier as claimed in claim 1 further comprising a scent diffusion unit in which aromatic substances are accommodated, and the scent diffusion unit is housed in the receiving groove of the body.

6. The scent air purifier as claimed in claim 5 , wherein the scent diffusion unit is a scent carrier made of porous solid and configured to absorb the aromatic substances.

7. The scent air purifier as claimed in claim 6 , wherein the scent diffusion unit is a solid capsule which has the scent carrier, a shell, a lid, and multiple second vents; the shell has a mouth defined on a top thereof, the multiple second vents are formed on a bottom of the shell, the scent carrier absorbs at least one of the aromatic substances and is housed in the shell, and the lid is covered on the mouth, wherein an adjustable spraying gap is defined between the lid and the mouth.

8. The scent air purifier as claimed in claim 7 , wherein the scent carrier has a third through orifice defined on a center thereof; the lid has a hollow post extending outward from a bottom thereof and has female threaded section formed on a free end of the hollow post; the shell has a male threaded section extending from the bottom thereof, wherein a diameter of the third through orifice is more than the hollow post or the male threaded section, the scent carrier is accommodated in the shell, a part of the third through orifice surrounds the male threaded section, and when the lid is coupled with the shell, the hollow post is inserted into the third through orifice of the scent carrier, and the female threaded section of the hollow post is rotatably screwed with the male threaded section of the shell so as to adjust the adjustable spraying gap between the lid and the shell.

9. The scent air purifier as claimed in claim 8 , wherein the scent carrier of the scent diffusion unit is made of the porous solid, and the porous solid is any one of plastic, polyethylene (PE), ceramics, plaster, stone, foam, and wood.

10. The scent air purifier as claimed in claim 9 , wherein the scent carrier has multiple apertures extending therethrough.

11. The scent air purifier as claimed in claim 5 further comprising a button and a housing hole, wherein the housing hole is defined between the receiving groove and the accommodation chamber of the body, the button is electrically connected with the circuit board, the multiple light emitting elements, the control circuit unit, and the fan, wherein an upper end of the button extends into a bottom of the receiving groove so as to contact with a bottom of the scent diffusion unit.

12. The scent air purifier as claimed in claim 1 further comprising a positioning disc, a pushing disc, and a resilient element, wherein the positioning disc has a pore and is located between the holder and the filter element, the pushing disc is mounted below the pore, and an upper end of the pushing disc extends out of the pore and abuts against a bottom of the filter element, wherein a first side of the resilient element contacts against a bottom of the holder, and a second side of the resilient element pushes the pushing disc.

13. The scent air purifier as claimed in claim 1 further comprising a stopping disc and a flexible ring, wherein the stopping disc has a fourth through orifice, and the stopping disc is connected with a bottom of the fan, wherein a first side of the flexible ring abuts against the stopping disc, and a second side of the flexible ring contacts with the mouth of the filter element.

14. The scent air purifier as claimed in claim 1 further comprising a detector electrically connected with the control circuit unit and the fan.

15. A scent air purifier comprising a scent diffusion unit, wherein the scent diffusion unit is a solid capsule which has a scent carrier, a shell, a lid, and multiple second vents; the shell has a mouth defined on a top thereof, the multiple second vents are formed on a bottom of the shell, the scent carrier absorbs at least one of the aromatic substances and is housed in the shell, and the lid is covered on the mouth, wherein an adjustable spraying gap is defined between the lid and the mouth, wherein the scent carrier has a through orifice defined on a center thereof; the lid has a hollow post extending outward from a bottom thereof and has female threaded section formed on a free end of the hollow post; the shell has a male threaded section extending from the bottom thereof, wherein a diameter of the through orifice is more than the hollow post or the male threaded section, the scent carrier is accommodated in the shell, a part of the through orifice surrounds the male threaded section, and when the lid is coupled with the shell, the hollow post is inserted into the through orifice of the scent carrier, and the female threaded section of the hollow post is rotatably screwed with the male threaded section of the shell so as to adjust the adjustable spraying gap between the lid and the shell.

16. The scent air purifier as claimed in claim 15 , wherein the scent carrier of the scent diffusion unit is made of the porous solid, and the porous solid is any one of plastic, polyethylene (PE), ceramics, plaster, stone, foam, and wood.

17. The scent air purifier as claimed in claim 16 , wherein the scent carrier has multiple apertures extending therethrough.

18. The scent air purifier as claimed in claim 17 , wherein the shell has multiple locking ribs separately extending around an inner wall of the shell from the bottom of the shell.