Diffuser device for volatile substances

1. A diffuser device for volatile substances, comprising:

a motor unit ( 2 ) comprising an air suction fan ( 6 ) comprising a body ( 60 ) and an electric motor (M 1 ) that drives a plurality of blades ( 62 ) in rotation, electrical power supply means ( 4 , 5 ) to power said fan motor (M 1 ) electrically and a support structure ( 20 , 21 ) able to support said fan ( 6 ) and said electrical supply means ( 4 , 5 ); and

a refill unit ( 3 ) comprising a refill ( 9 ) containing volatile substances to be diffused, filtering means ( 90 ) for air filtering and a support structure ( 30 ) able to support said refill ( 9 ) and said filtering means ( 90 ), characterised in that

said refill unit ( 3 ) can be assembled on said motor unit ( 2 ) so that the filtering means ( 90 ) are situated upstream of said fan ( 6 ) to filter all the air sucked in by the fan ( 6 ); and

said fan body ( 60 ) has an air inlet aperture ( 62 ) which allows an incoming flow of air along the axis of rotation of the blades ( 61 ) of the fan ( 6 ) and an air outlet aperture ( 63 ) disposed so as to allow a laminar outgoing flow of air, substantially at right angles to the incoming flow of air, wherein said outgoing flow of air strikes the refill ( 9 ) to favour diffusion of the volatile substances.

2. A diffuser device according to claim 1 , characterised in that said refill ( 9 ) has a flat permeable surface ( 95 ) disposed substantially obliquely to the incident laminar flow of air coming from the outlet ( 63 ) of said fan, so as to generate a further laminar outgoing flow of air towards the outside environment.

3. A diffuser device according to claim 1 , characterised in that it comprises regulation means ( 8 ) for regulating the amount of substances diffused, able to regulate the amount of air exiting through said outlet aperture ( 63 ) of the fan and incident on said refill ( 9 ).

4. A diffuser device according to claim 3 , characterised in that said regulation means ( 8 ) comprise deflector/shutter means ( 82 ) able to regulate the air outlet size of an array of slots ( 71 ) formed in said support structure ( 21 ) of the motor unit in register with the air outlet aperture ( 63 ) of the fan ( 6 ).

5. A diffuser device according to claim 3 , characterised in that said regulation means ( 8 ) comprise a knob ( 83 ) that can be operated by the user, having an indicator ( 84 ) which points to a graduated scale ( 74 ) realised on said support structure ( 21 ) of the motor unit.

6. A diffuser device according to claim 1 , characterised in that it comprises means for regulating the amount of substances diffused, able to regulate the surface of a permeable wall ( 95 ) of said refill ( 9 ) exposed to the flow of incident air.

7. A diffuser device according to claim 1 , characterised in that said electric motor (M 1 ) of the fan is a direct current brushless motor.

8. A diffuser device according to claim 1 , characterised in that said electrical supply means ( 4 , 5 ) comprise an electric plug ( 4 ) designed to be connected to the electrical main and a printed circuit board ( 5 ) connected electrically to said electric plug ( 4 ) and electrically coupleable to said fan motor (M 1 ).

9. A diffuser device according to claim 8 , characterised in that a resistor bridge (R 1 , R 2 , R 3 , R 4 ), able to create a reduction in the alternating voltage coming from the electrical main and to prepare a suitable current for the power supply of said motor (M 1 ), is mounted in said printed circuit board ( 5 ).

10. A diffuser device according to claim 9 , characterised in that said resistors (R 1 , R 2 , R 3 , R 4 ) of the bridge of the circuit board ( 5 ) are inserted in respective slots ( 64 ) in the fan body ( 60 ) to be cooled by the air sucked in by the fan and to allow a flow of hot air incident on the refill ( 9 ).

11. A diffuser device according to claim 8 , characterised in that in said circuit board ( 5 ) pads (J 3 , J 4 ) able to go into electrical contact with electrical cables ( 55 , 56 ) of said electric motor (M 1 ) are provided.

12. A diffuser device according to claim 8 , characterised in that in said circuit board ( 5 ) there is mounted an electric switch (SW 1 ) able to open/close the supply circuit of said electric motor (M 1 ).

13. A diffuser device according to claim 12 , characterised in that said electric switch comprises an operating lever ( 50 ) which is operated when the refill unit ( 3 ) is mounted on the motor unit ( 2 ) so as to close the supply circuit of said motor (M 1 ).

14. A diffuser device according to claim 8 , characterised in that in said circuit board ( 5 ) there is mounted a light device (D 3 ) able to emit a light signal indicating operation of said diffuser device and acting as night light device.

15. A diffuser device according to claim 1 , characterised in that said filtering means ( 90 ) are made from light-coloured materials which, becoming dirty due to the filtering action, change their colour providing a simple indication that the filter is exhausted.

16. A diffuser device according to claim 1 , characterised in that the reservoir of said refill ( 9 ) is made of a transparent material which allows the volatile substance contained therein to be seen, providing a simple indication that the refill is exhausted.

17. A diffuser device according to claim 1 , characterised in that said support structure ( 30 ) of the refill unit comprises a book-type closing system consisting of a top part ( 32 ) in which the refill ( 9 ) is housed, hinged by means of a hinge ( 33 ) to a bottom part ( 31 ) which has a grille aperture ( 92 ) for the air to exit to the outside.

18. A diffuser device according to claim 1 , characterised in that said support structure of the motor unit comprises a bottom half-shell ( 22 ) which houses said fan ( 6 ), said supply means ( 4 ) and a top half-shell ( 21 ) which is snap coupled on said bottom half-shell ( 20 ).