PUMP FOR LIQUID COOLING SYSTEM

• US 20090162225A1
• Filed: 12/20/2007
• Published: 06/25/2009
• Est. Priority Date: 12/20/2007
• Status: Abandoned Application

• Current Assignee: Foxconn Technology Co., Ltd., Fuzhun Precision Industry Company Limited (Foxconn Technology Co., Ltd.)
• Original Assignee: Foxconn Technology Co., Ltd., Fuzhun Precision Industry Company Limited (Foxconn Technology Co., Ltd.)
• Inventors: ZHOU, ZHI-YONG, LAI, CHENG-TIEN, DING, QIAO-LI
• Application Number:
  US11/961,344
• Publication Number:
  US 20090162225A1
• Time in Patent Office: Days
• US Class Current: 417/423.300
• CPC Class Codes: F04D 13/064 Details of the magnetic circuit
• CPC Class Codes: F04D 13/0673 the motor being of the inside-out type
• CPC Class Codes: F04D 29/047 hydrostatic; hydrodynamic
• CPC Class Codes: H02K 16/04 Machines with one rotor and two stators
• CPC Class Codes: H02K 21/12 with stationary armatures and rotating magnets
• CPC Class Codes: H02K 5/132 Submersible electric motors H02K5/128 takes precedence

Abstract

A pump comprises a base (10), a case (20) fixed on the base, a rotor (30) received between the case and the base, and an inner stator (40) and an outer stator (50) accommodated in the case. The rotor is sandwiched between the inner stator and the outer stator. When the inner stator and the outer stator are energized to generate respective magnetic fields, the rotor is driven to rotate by turning torques that are produced by mutual actions between the rotor and the magnetic fields. Thus, the interior and exterior magnetic fields of the rotor can be utilized sufficiently, and an operation efficiency of the pump is enhanced accordingly.

Claims

1. A pump for a liquid cooling system comprising:

a base;

a case fixed on the base;

a rotor received between the base and the case, comprising a magnetic sleeve accommodated in the case;

an inner stator received in the case and surrounded by the magnetic sleeve of the rotor; and

an outer stator received in the case and surrounding the magnetic sleeve of the rotor, the inner stator and the outer stator being separated from the rotor by an interlayer formed in the case, wherein when the inner stator and the outer stator are energized, an inner magnetic field produced by the inner stator and an outer magnetic field produced by the outer stator interact with the magnetic sleeve to together drive the rotor to rotate.

2. The pump as claimed in claim 1, wherein the rotor comprises a circular panel and a plurality of blades raidally attached on a bottom face of the circular panel, the plurality of blades and the circular plate being received in the base.

3. The pump as claimed in claim 2, wherein the rotor further comprises a pair of coaxial sidewalls extending upwardly from the a top face of the circular panel, and a shaft formed upwardly from the top face of the circular panel and surrounded by the pair of coaxial sidewalls, the magnetic sleeve being sandwiched between the pair of coaxial sidewalls.

4. The pump as claimed in claim 3, wherein the case defines a circular cavity opened downwardly, and an annular cavity opened downwardly and surrounding the circular cavity, the shaft being received in the circular cavity and the pair of coaxial sidewalls being received in the annular cavity.

5. The pump as claimed in claim 4, wherein the case defines an annular chamber opened upwardly, and another annular chamber opened upwardly and surrounding the annular chamber, the inner stator being received in the annular chamber and the outer stator being received in the another annular chamber.

6. The pump as claimed in claim 5, wherein the annular chamber of the case surrounds the circular cavity and is surrounded by the annular cavity, and the another annular chamber surrounds the annular cavity.

7. The pump as claimed in claim 2, wherein the base defines a transverse hole in an upper portion thereof, a horizontal hole in a lower portion thereof, and a upright hole from a top to a bottom thereof, the upright hole communicating the horizontal hole with the transverse horizontal hole and receiving the plurality of blades of the rotor therein.

8. The pump as claimed in claim 7 further comprises an annulus received in the upright hole and at a middle of a height of the base to separate the horizontal hole with the transverse hole of the base, wherein the rotor is located above the annulus.

9. The pump as claimed in claim 1, wherein the magnetic sleeve has a plurality of alternating N and S poles, each of the inner stator and the outer stator comprising circumferentially distributed teeth having a number identical to that of the plurality of alternating N and S poles of the magnetic sleeve.

10. The pump as claimed in claim 9, wherein each of the teeth of the inner stator is opposing to each of the teeth of the outer stator, the each of the teeth of the inner stator having opposite polarities relative to that of the each of the teeth of the outer stator.

11. The pump as claimed in claim 9, wherein each of the teeth of the inner stator is staggered with each of the teeth of the outer stator.

12. A pump for a liquid cooling system comprising:

a base;

a case secured on the base, the case comprising an interlayer to separate an interior thereof to a first space and a second space;

a bearing being received within the first space of the case;

a rotor being received between the base and the case, the rotor comprising a shaft being supported by the bearing, and a magnetic sleeve enclosing the shaft, the magnetic sleeve being received in the first space of the case;

an inner stator being received in the second space of the case and surrounded by the magnetic sleeve of the rotor; and

an outer stator being received in the second space of the case and around the magnetic sleeve of the rotor, wherein the outer stator and the inner stator generate turning torques having same orientations to act on the rotor, thereby driving the rotor to rotate.

13. The pump as claimed in claim 12, wherein the first space of the case has an opening oriented downwardly, and the second space of the case has an opening oriented upwardly.

14. The pump as claimed in claim 12, wherein each of the inner stator and the outer stator comprises a plurality of yokes stacked with each other, a plurality of teeth extending inwardly from inner peripheries of the plurality of yokes, and a plurality of armature coils wound on the plurality of teeth respectively.

15. The pump as claimed in claim 14, wherein each of the plurality of teeth of the inner stator faces each of the plurality of teeth of the outer stator, the each of the plurality of teeth of the inner stator having opposite magnetic poles with respect to that of an adjacent one of the plurality of teeth of the inner stator.

16. The pump as claimed in claim 14, wherein each of the plurality of teeth of the inner stator is staggered with each of the plurality of teeth of the outer stator.

17. The pump as claimed in claim 14, wherein a spirally wound configuration of the coils on each of the plurality of teeth of the inner stator is opposite to that of the coils of an opposing one of the plurality of teeth of the outer stator.

18. A liquid pump, comprising:

a casing defining therein a chamber, an inlet and an outlet both being in flow communication with the chamber;

a rotor received in the chamber and being rotatable to drive liquid to enter the chamber via the inlet and to exit the chamber via the outlet, the rotor comprising a cylindrical outer wall and a substrate connecting with a bottom end of the outer wall, an agitator being formed on a bottom surface of the substrate;

an inner stator and an outer stator received in the chamber to drive the rotor to rotate, wherein the inner stator located at an inner space of the outer wall of the rotor and the outer stator surrounds the outer wall of the rotor;

a partition seat received in the chamber and arranged between the inner and outer stators and the rotor to space the inner and outer stators and the rotor; and

a top cover mounted to a top of the casing.

19. The liquid pump as described in claim 18, wherein a magnetic ring having a plurality of alternating N and S poles is embedded in the outer wall of the rotor.