COMPACT AIR COOLING SYSTEM

• US 20090263232A1
• Filed: 04/17/2008
• Published: 10/22/2009
• Est. Priority Date: 04/17/2008
• Status: Abandoned Application

• Current Assignee: Minebea Company Limited (MinebeaMitsumi Inc.)
• Original Assignee: Minebea Company Limited (MinebeaMitsumi Inc.)
• Inventors: JARRAH, YOUSEF
• Application Number:
  US12/105,132
• Publication Number:
  US 20090263232A1
• Time in Patent Office: Days
• US Class Current: 415/4.400
• CPC Class Codes: F04D 25/0613 the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
• CPC Class Codes: F04D 29/444 Bladed diffusers
• CPC Class Codes: F04D 29/582 specially adapted for elastic fluid pumps

Abstract

An apparatus for air cooling an object. The apparatus includes a plate including a first surface and a second surface and a plurality of aerodynamic fins being fixedly disposed on the first surface in an arrangement along periphery of the plate. The arrangement of the plurality of aerodynamic fins defining a central volume of space. Additionally, the apparatus includes a blower including a plurality of impeller blades rotatably disposed within the central volume of space for rotary motion about an axis of rotation. In particular, the second surface is for thermally contacting with the object and the axis of rotation is substantially perpendicular to the first surface. Furthermore, the rotary motion of the blower creates an air inflow along the axis of rotation into the central volume of space and an air outflow through the plurality of aerodynamic fins in radial directions.

Claims

1. An apparatus for air cooling an object, the apparatus comprising

a plate including a first surface and a second surface;

a plurality of aerodynamic fins being fixedly disposed on the first surface in an arrangement along periphery of the plate, the arrangement of the plurality of aerodynamic fins defining a central volume of space; and

a blower impeller rotatably disposed within the central volume of space for rotary motion about an axis of rotation;

wherein;

the second surface is for thermally contacting with the object;

the axis of rotation is substantially perpendicular to the first surface;

the rotary motion of the blower impeller creates an air inflow into the central volume of space along the axis of rotation and an air outflow in radial directions through the plurality of aerodynamic fins.

2. The apparatus of claim 1 wherein the plate comprises a thermally conductive material in a circular, or a polygonal, or an oval shape.

3. The apparatus of claim 1 wherein the plurality of aerodynamic fins comprise thermally conductive materials including alloys of aluminum, or alloys of copper, or conductive polymer or plastics.

4. The apparatus of claim 1 wherein each of the plurality of aerodynamic fins comprises an arc-like shaped blade curved from a leading edge to a trailing edge.

5. The apparatus of claim 4 wherein the arrangement of the plurality of aerodynamic fins comprises a distribution of each arc-like shaped blade with substantially an equal spacing apart from a neighboring blade, the leading edge stood near the central volume of space, and the trailing edge stood near the periphery of the plate.

6. The apparatus of claim 5 the arrangement of the plurality of aerodynamic fins further comprises a first angle characterized for each arc-like shaped blade disposed relative to the first surface.

7. The apparatus of claim 6 wherein the first angle is about 90 degrees.

8. The apparatus of claim 5 wherein the arrangement of the plurality of aerodynamic fins further comprises a second angle and a third angle characterizing orientation for each arc-like shaped blade within the first surface, the second angle being an inlet angle measured from a tangential direction of the leading edge to a corresponding radial line, the third angle being an exit angle measured from a tangential direction of the trailing edge to a corresponding radial line, the second angle being substantially equal to zero degrees and the third angle being between about 50 degrees and about 60 degrees.

9. The apparatus of claim 1 wherein the blower impeller comprises:

a rotor co-axial with the axis of rotation;

a housing enclosing the rotor to occupy an inner circumferential portion of the central volume of space;

a ring-shaped plate being radially coupled with the rotor for rotary motion around the housing; and

a plurality of impeller blades being fixedly arranged about the ring-shaped plate, the arrangement of the plurality of impeller blades radially occupying an outer circumferential portion of the central volume of space, the outer circumferential portion being spaced apart a first gap from the inner circumferential portion and a second gap from the plurality of aerodynamic fins.

10. The apparatus of claim 9 wherein the second gap is substantially smaller than the first gap.

11. The apparatus of claim 9 wherein the ring-shaped plate is disposed above and in parallel relation to the first surface.

12. The apparatus of claim 9 wherein the housing comprises one or more arms radially extended to connect one or more support struts fixedly coupled with the plate.

13. The apparatus of claim 9 wherein each of the plurality of impeller blades is an arc-shaped blade vertically disposed on the ring-shaped plate with substantial equal spacing to each other, the arc-shaped blade including a first edge and a second edge connected by a concave side opposing a convex side.

14. The apparatus of claim 13 wherein the concave side leads the convex side in a rotational direction.

15. The apparatus of claim 13 wherein the arrangement of the plurality of impeller blades comprises a fourth angle and fifth angle characterizing orientation for each arc-shaped blade within the ring-shaped plate, the fourth angle being a tangential angle associated with corresponding first edge, the fifth angle being a tangential angle associated with corresponding second edge, the fourth angle and the fifth angle being substantially the same and about 45 degrees.

16. The apparatus of claim 9 further comprising a ring structure separated from the ring-shaped plate within the central volume of space, the ring structure being fixedly attached with a portion of each of the plurality of impeller blades for mechanical support.

17. An apparatus for processing fluid flow, comprising,

a circular plate;

a plurality of curved fins fixedly disposed in an arrangement radially about periphery of the circular plate, the arrangement of the plurality of curved fins defining a central volume of space;

a blower impeller including a rotor enclosed within a housing and a plurality of impeller blades coupled to the rotor for rotary motion about an axis of rotation, the housing being fixedly attached with the circular plate and occupied an inner circumferential portion of the central volume of space, the plurality of impeller blades being radially arranged about outer circumferential portion of the central volume of space, the outer circumferential portion being spaced apart a first gap from the inner circumferential portion and a second gap from the plurality of curved fins;

wherein;

the axis of rotation is perpendicularly centered with the circular plate;

the rotary motion of the plurality of impeller blades creates a fluid inflow into the first gap within the central volume of space along the axis of rotation and drives a fluid outflow crossing the second gap and passing through the plurality of curved fins in radial directions.

18. The apparatus of claim 17 wherein each of the plurality of curved fins is a first airfoil-shaped blade including a leading edge facing the fluid outflow generated from the plurality of impeller blades, a trailing edge near periphery of the circular plate, a convex side, and a concave side opposing to the convex side, the leading edge being connected to the trailing edge by the convex side and the concave side.

19. The apparatus of claim 18 wherein the arrangement of the plurality of curved fins comprises a distribution of the first airfoil-shaped blade with a substantial equal spacing apart from neighboring blade and an orientation characterized by a side angle, a trailing edge exit angle and a leading edge inlet angle.

20. The apparatus of claim 19 wherein:

the side angle is about 90 degrees measured between the convex side/concave side and the circular plate;

trailing edge exit angle is substantially zero degrees measured from a tangential direction to a corresponding radial direction for the trailing edge;

the leading edge inlet angle is between about 50 and 65 degrees measured from a tangential direction to a corresponding radial direction for the leading edge.

21. The apparatus of claim 17 further comprising a ring-shaped plate in parallel to the circular plate and radially coupled with the rotor, serving as a common base for the plurality of impeller blades.

22. The apparatus of claim 21 wherein each of the plurality of impeller blades comprises a second airfoil-shaped blade vertically coupled with the ring-shaped plate, the second airfoil-shaped blade including a first edge near the plurality of curved fins, a second edge near the housing of rotor, a convex side, and a concave side opposing to the convex side, the first edge being connected to the second edge by the convex side and the concave side.

23. The apparatus of claim 22 wherein the second airfoil-shaped blade is oriented such that a first tangential direction at the first edge within the ring-shaped plate is off a first angle from a third radial direction corresponding to the first edge, and a second tangential direction at the second edge within the ring-shaped plate is off a second angle from a fourth radial direction corresponding to the second edge.

24. The apparatus of claim 23 wherein the third radial direction is substantially the same as the fourth radial direction and the first angle and the second angle are substantially the same about 45 degrees.

25. The apparatus of claim 21 further comprising a ring structure spaced apart from the ring-shaped plate, the ring structure being coaxial with the axis of rotation and attached with a portion of each of the plurality of impeller blades for mechanical support.

26. A method of cooling an object, the method comprising:

providing an air cooling apparatus, the apparatus including;

a plate including a first surface and a second surface;

a plurality of airfoil-shaped fins being integrally coupled with the first surface in a radial arrangement along periphery of the plate, the radial arrangement of the plurality of airfoil-shaped fins defining a central volume of space; and

a blower impeller including a plurality of impeller blades radially coupled to a rotor and rotatably disposed within the central volume of space for rotary motion about an axis of rotation, wherein the axis of rotation is perpendicular to the first surface;

making a thermal contact between the second surface and the object, thereby conducting heat from the object through the plate to the plurality of airfoil-shaped fins;

driving the rotary motion of the plurality of impeller blades by powering the rotor;

creating an inflow of air along the axis of rotation into the central volume of space; and

driving the air through the plurality of airfoil-shaped fins to diffuse the heat out in radial directions.

27. The method of claim 26 wherein the providing the air cooling apparatus further comprises arranging the plurality of airfoil-shaped fins and the plurality of impeller blades such that:

each of the plurality of airfoil-shaped fins includes arc-curved side-surfaces substantially perpendicular to the first surface from a leading edge to a trailing edge and is spaced apart from a neighboring airfoil-shaped fin by a first separation, thereby forming an aerodynamic air flow channel between each neighboring airfoil-shaped fins;

each of the plurality of impeller blades includes arc-curved side-surfaces substantially parallel to the axis of rotation from a first edge to a second edge and is spaced apart from a neighboring impeller blade by a second separation, the first edge being near the leading edge during the rotary motion and the second separation being adapted to the first separation for facilitating the outflow of air.