DEVICE FOR BLOWING AIR BY MEANS OF NARROW SLIT NOZZLE ASSEMBLY

• US 20130330215A1
• Filed: 11/27/2012
• Published: 12/12/2013
• Est. Priority Date: 05/27/2010
• Status: Active Grant

• Current Assignee: Dyson Technology Limited (Beeswax Holdings UK Limited)
• Original Assignee: Dyson Technology Limited (Beeswax Holdings UK Limited)
• Inventors: LI, Dezheng
• Granted Patent: US 8,721,307 B2
• Time in Patent Office: Days
• US Class Current: 417/410.1
• CPC Class Codes: B05B 9/01 Spray pistols, discharge devicesB05B9/03 takes precedence
• CPC Class Codes: F04D 13/06 the pump being electrically driven
• CPC Class Codes: F04D 25/08 the working fluid being air, e.g. for ventilation
• CPC Class Codes: F04D 25/10 the unit having provisions for automatically changing direction of output air
• CPC Class Codes: F04D 25/105 by changing rotor axis direction, e.g. oscillating fans interconnecting rotary motion and oscillating motion F16H
• CPC Class Codes: F04F 5/16 displacing elastic fluids
• CPC Class Codes: F04F 5/461 Adjustable nozzles

Abstract

A device for blowing air by a narrow slit nozzle assembly is provided. The device includes a base seat for generating an air stream to supply air flow and a narrow slit nozzle assembly supported by the base seat for blowing air. An airflow passage is connected between the base seat and the nozzle assembly. An intake end of the airflow passage is opened on the outer surface of the base seat, and an output end is connected to the nozzle assembly by a pivot component. An intake end of the nozzle assembly is connected to an output end of the base seat by the pivot component. An impeller and an electric motor for driving the impeller to rotate are provided within the base seat. The nozzle assembly is rotatably fixed on the base seat by the pivot component. The rotation direction of the nozzle can be adjusted by the rotation of the pivot component around the airflow passage. And when the fan is idle, the nozzle can be folded so as to save space.

Claims

1. A device for blowing air by a narrow slit nozzle assembly, comprising a base seat for generating an air stream to supply air flow and a narrow slit nozzle assembly supported by the base seat for blowing air, wherein an airflow passage is connected between the base seat and the nozzle assembly, an intake end of the airflow passage is opened on an outer surface of the base seat, and an output end of the airflow passage is connected to the nozzle assembly by a pivot component;

an intake end of the nozzle assembly is connected to an output end of the base seat by the pivot component;

an impeller and an electric motor for driving the impeller to rotate are provided within the base seat, and the nozzle assembly is rotatably fixed on the base seat by the pivot component.

2. The device for blowing air of claim 1, wherein the nozzle assembly is rotatably fixed on the base seat by the pivot component at any orientation.

3. The device for blowing air of claim 1, wherein the nozzle assembly is rotatably fixed on the base seat by the pivot component at an elevation angle of 0-360°

.

4. The device for blowing air of claim 1, wherein an air filter assembly is arranged at an opening of the intake end of the airflow passage on the surface of the base seat.

5. The device for blowing air of claim 1, wherein the impeller and the electric motor are coaxially accommodated in a casing within the base seat to constitute an air supply assembly for generating an air stream, and an air filter assembly is installed at an opening of the intake end of the airflow passage on the casing.

6. The device for blowing air of claim 4 or 5, wherein the air filter assembly is detachably installed at the opening of the intake end of each airflow passage.

7. The device for blowing air of claim 5, wherein an air filter assembly is provided between the opening of the intake end of the airflow passage on the surface of the base seat and the casing of the air supply assembly.

8. The device for blowing air of claim 4, wherein the air filter assembly is a mesh filter, a filter laminate, or a filter cartridge based on the filter laminate.

9. The device for blowing air of claim 1, wherein an accelerating transmission mechanism is installed on an output shaft of the electric motor for driving the impeller to rotate in the base seat and includes a pulley drive and a gear pair transmission mechanism.

10. The device for blowing air of claim 1, wherein the nozzle assembly is overall shaped like a round or oval ring with a constant section and includes a rectifier ring for receiving the air stream in an inner cavity of the assembly and a narrow slit nozzle for blowing air arranged on an outer ring circumference or an oval circumference.

11. The device for blowing air of claim 10, wherein the rectifier ring includes a gradually narrowing tapered area and the narrow slit nozzle for blowing air is located at a tip of the tapered area.

12. The device for blowing air of claim 11, wherein a distance between two opposing surfaces for limiting a width of the narrow slit nozzle for blowing air is 0.2-15.0 mm, an angle formed between an air blowing direction of an air supply part of the nozzle and a central axis of the rectifier ring is 0.2-20.0°

, and a length of the air supply part in the air blowing direction is 0.2-30.0 mm.

13. The device for blowing air of claim 11, wherein two opposing surfaces for limiting the width of the narrow slit nozzle for blowing air are separated by at least one partition board extending along the nozzle, and the partition board is connected with the two opposing surfaces by a fixing member to form multiple rows of air supply outlets extending along the nozzle;

two adjacent rows of air supply outlets are arranged in alignment or in a staggered manner;

each air supply outlet includes opposing surfaces for limiting each air supply outlet, the sum of distances between each pair of opposing surfaces is 0.2 mm-15 mm, an angle formed between the air blowing direction of the air supply part of the nozzle and the central axis of the rectifier ring is 0.2-20.0°

, and the length of the air supply part in the air blowing direction is 0.2-30.0 mm.

14. The device for blowing air of claim 1, wherein the pivot component includes a T-shaped hollow pipe installed within the base seat, two ends of a horizontal pipe of the T-shaped hollow pipe are in communication with the intake end of the nozzle assembly;

a vertical pipe of the T-shaped hollow pipe is in communication with the output end of the base seat;

the two ends of the horizontal pipe are respectively socketed with a flange that rotates around the horizontal pipe, and the flange and the nozzle assembly are fixed together, so that the nozzle assembly and the flange rotate around the horizontal pipe together.

15. The device for blowing air of claim 1, wherein the pivot component includes a hollow pipe arranged at the intake end of the nozzle assembly, the hollow pipe and the nozzle assembly are fixed together, and a sealing member is arranged between the hollow pipe and an air outlet of a casing within the base seat, so that the nozzle assembly and the hollow pipe rotate together.

16. The device for blowing air of claim 14 or 15, wherein a sealing member is arranged between the flange or the hollow pipe and the casing within the base seat.

17. The device for blowing air of claim 14 or 15, wherein a circlip is arranged on the flange or the hollow pipe to prevent the nozzle assembly from disengaging from the casing within the base seat.

18. The device for blowing air of claim 14, wherein the pivot component is connected with an assembly that facilitates smooth rotation of the nozzle assembly and includes a spring fixed in the casing of the base seat and roller balls placed on the spring;

a rounded toothed connecting section is arranged on the outer circumference of the flange, and the roller balls rest against each concave portion of the toothed connecting section, thereby facilitating smooth rotation of the nozzle assembly around the horizontal pipe.

19. The device for blowing air of claim 14, wherein the pivot component is connected with a plastic part that facilitates smooth rotation of the nozzle assembly, protrusions are arranged at the plastic part corresponding to the rounded toothed connecting section of the flange, and the protrusions rest against each concave portion of the toothed connecting section, thereby facilitating smooth rotation of the nozzle assembly around the horizontal pipe.

20. The device for blowing air of claim 14 or 15, wherein a sealing member is arranged between the flange and the horizontal pipe, and a fastener is connected between the flange and the nozzle assembly.

21. The device for blowing air of claim 1, wherein a secondary electric motor for controlling pitch rotation of the nozzle assembly and at least one drive wheel connected to an output shaft of the secondary electric motor are provided in a casing within the base seat, and an engagement of the drive wheel with the pivot component makes the nozzle assembly rotate smoothly.

22. The device for blowing air of claim 1, wherein the electric motor and the impeller constitute an air supply assembly of the device for blowing air, the air supply assembly is accommodated in a casing, and the casing is fixed within the base seat through a damping mechanism.

23. The device for blowing air of claim 1, wherein the impeller and the electric motor are both accommodated in a casing to constitute an air supply assembly, and a shock-absorption connecting member is arranged between the casing and the intake end of the airflow passage.

24. The device for blowing air of claim 1, further comprising a swing motor disposed within the base seat for driving the nozzle assembly to rotate in the horizontal direction to adjust azimuth, wherein the swing motor is connected to a transmission arm, thereby driving a rotary shaft connected with the transmission arm to rotate and finally making the nozzle assembly rotate on a horizontal plane along with an upper part of the base seat on which the nozzle assembly is fixed.

25. The device for blowing air of claim 1, wherein the base seat is provided with a connecting member for fixing the device for blowing air in place.

26. The device for blowing air of claim 24, wherein a housing of the base seat is provided with a fixing component for fixing the device for blowing air in place.

27. The device for blowing air of claim 1, further comprising a USB port arranged on the base seat, comprising a standard or a mini-USB port.

28. The device for blowing air of claim 24, wherein the upper part of the base seat, in which the air supply assembly is fixed, obtains power to drive the air supply assembly from a lower part of the base seat by a double-pole coaxial slip ring capable of slideably rotating at a rotation centre on the bottom.