Pumpless liquid cooling system

• US 20090038780A1
• Filed: 08/06/2008
• Published: 02/12/2009
• Est. Priority Date: 08/10/2007
• Status: Abandoned Application

• Current Assignee: Kechuan Kevin Liu
• Original Assignee: Kechuan Kevin Liu
• Inventors: Liu, Kechuan Kevin
• Application Number:
  US12/221,859
• Publication Number:
  US 20090038780A1
• Time in Patent Office: Days
• US Class Current: 165/104.280
• CPC Class Codes: F28D 1/024 with an air driving element
• CPC Class Codes: F28D 2015/0291 comprising internal rotor means, e.g. turbine driven by the working fluid
• CPC Class Codes: F28F 1/16 the means being integral with the element, e.g. formed by extrusion F28F1/22 takes precedence
• CPC Class Codes: F28F 2250/08 Fluid driving means, e.g. pumps, fans
• CPC Class Codes: F28F 3/12 Elements constructed in the shape of a hollow panel, e.g. with channels F28D1/02, F28D1/03 take precedence
• CPC Class Codes: H01L 21/4882 Assembly of heatsink parts
• CPC Class Codes: H01L 23/467 by flowing gases, e.g. air H01L23/473 takes precedence
• CPC Class Codes: H01L 23/473 by flowing liquids H01L23/4332, H01L23/4338 take precedence
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Abstract

A pumpless liquid cooling system for removing heat from heat-generating components or systems comprises a heat absorbing portion or cold plate, a heat dissipating portion or heat exchanger and at least one driving device. The heat absorbing portion and the heat dissipating portion are of unitary construction as a sealed container with working fluid inside. The driving device and the heat dissipating portion is co-axially aligned and attached or fastened together. The heat absorbing portion is configured to have at least one thermal contact surface and a plurality of liquid passage within. The heat dissipating portion is configured to have a heat-dissipating body with plurality of external fins and an internal cylindrical liquid passage communicating with those of the heat absorbing portion and having a running fitting impeller driven by the driving device via magnetic forces to circulate the liquid in the heat transfer loop. Meanwhile the driving device moves the cool air through the fins of the heat dissipating portion to reject the heat absorbed by the heat absorbing portion.

Claims

1. A pumpless liquid cooling system for removing heat from heat-generating components or systems comprising:

(a) a heat absorbing portion;

(b) a heat dissipating portion; and

(c) at least one driving device;

said heat absorbing portion and said heat dissipating portion being of unitary construction as a sealed container with working fluid inside;

said heat dissipating portion configured to have liquid circulating mechanism internally and heat rejection capabilities externally;

said heat absorbing portion and said heat dissipating portion having liquid passages internally and being connected to form heat transfer loop;

said driving device and said heat dissipating portion being co-axially aligned and attached or fastened together.

2. A pumpless liquid cooling system for removing heat from heat-generating components or system as recited in claim 1 wherein said heat absorbing portion having a base or body configured to have at least one thermal interface surface, a plurality of liquid channels running inside for liquid passing through, an inlet and an outlet for liquid in and out;

3. A pumpless liquid cooling system for removing heat from heat-generating components or system as recited in claim 2 wherein said liquid channel may be built as micro-channel or milli-channel for maximum liquid contact areas and heat transfer rate.

4. A pumpless liquid cooling system for removing heat from heat-generating components or system as recited in claim 1 wherein said heat dissipating portion comprising a heat dissipating body, an impeller, an end cap, maybe a support bearing and a plug.

5. A pumpless liquid cooling system for removing heat from heat-generating components or system as recited in claim 4 wherein said heat dissipating body having extended external surface area or fins and internal cylindrical liquid passage, an inlet, an outlet and an orifice;

said external surface area or fins for heat rejection with air passing through naturally or convectively;

said inlet, said outlet and said liquid passage being in serial connection;

said orifice being used for filling-up liquid.

6. A pumpless liquid cooling system for removing heat from heat-generating components or system as recited in claim 4 wherein said impeller comprising a shaft having an axis, a magnetic disc attaching to said shaft co-axially at one end of said shaft;

a plurality of vanes attached or extended to said shaft radically.

7. A pumpless liquid cooling system for removing heat from heat-generating components or system as recited in claim 6 wherein said shaft with said vanes attached or extended may be a feed screw, so said impeller basically being a feed-screw with modifications.

8. A pumpless liquid cooling system for removing heat from heat-generating components or system as recited in claim 4 wherein said supporting bearing configured to have internal and external ring and a plurality of structural webs.

9. A pumpless liquid cooling system for removing heat from heat-generating components or system as recited in claim 4 wherein said heat dissipating body, said impeller, said end cap, said support bearing and said plug being assembled in co-axial relation;

said impeller and said cylindrical liquid passage being running fit;

said external ring of said supporting bearing and said cylindrical liquid passage being non-transitional fit;

said internal ring of said supporting bearing and said shaft of said impeller being running fit;

said end cap covering the open end of said cylindrical liquid passage after said impeller being assembled;

said plug being plugged into said orifice after liquid being filled up.

10. A pumpless liquid cooling system for removing heat from heat-generating components or system as recited in claim 1 wherein said driving device comprising a frame and a rotor;

said frame configured to have structure and a plurality mounting apertures;

said rotor configured to have a shaft having a plurality vanes attached on or extended from radically and a magnetic disc attached on its end co-axially driven by a motor.

11. A pumpless liquid cooling system for removing heat from heat-generating components or system as recited in claim 10 wherein said driving device may an alter item of a commercially available axial fan.

12. A heat pumpless liquid cooling system for removing heat from heat-generating components or system as recited in claim 1 wherein said driving device and said heat dissipating portion being assembled together in the relationship so that said magnetic disc of said rotor and said magnetic disc of said impeller being co-axial and face-to-face divided by said end cap.

13. A heat pumpless liquid cooling system for removing heat from heat-generating components or system as recited in claim 1 wherein said heat dissipating portion and said heat absorbing portion being unitary construction in the relationship so that said internal cylindrical liquid passage, said inlet, said outlet and said liquid channel being in serial connection to form liquid circulating heat transfer loop.

14. A heat pumpless liquid cooling system for removing heat from heat-generating components or system as recited in claim 1 wherein said internal cylindrical liquid passage, said inlet, said outlet and said liquid channel being internal voids for liquid volume.

15. A pumpless liquid cooling system for removing heat from heat-generating components or systems comprising:

(a) a heat absorbing portion;

(b) a heat dissipating portion;

(c) at least one driving device; and

(e) means for liquid circulating without using a pump

said heat absorbing portion and said heat dissipating portion being of unitary construction as a sealed container with working fluid inside;

said heat dissipating portion configured to have liquid circulating mechanism internally and heat rejection capabilities externally;

said heat absorbing portion and said heat dissipating portion having liquid passages internally and being connected to form heat transfer loop;

said driving device and said heat dissipating portion being co-axially aligned and attached or fastened together. said means for liquid circulating without using a pump being, instead, using said magnetic field force to transfer torques from said driving device to said impeller instead;

said torques rotating said impeller exerting pressure on liquid so as to circulate liquid in said heat transfer loop.

16. A pumpless liquid cooling system for removing heat from heat-generating components or systems as recited in claim 15 wherein said magnetic field force being from the pair of circular magnets on said rotor of said diving device and on said impeller in said heat dissipating portion.

17. A pumpless liquid cooling system for removing heat from heat-generating components or systems as recited in claim 16 wherein said pair of circular magnets being separated by said end cap without direct contact.

18. A pumpless liquid cooling system for removing heat from heat-generating components or systems comprising:

(a) a heat absorbing portion;

(b) a heat dissipating portion;

(c) at least one driving device; and

(d) means of physical connectionless between the driver and receiver

said heat absorbing portion and said heat dissipating portion being of unitary construction as a sealed container with working fluid inside;

said heat dissipating portion configured to have liquid circulating mechanism internally and heat rejection capabilities externally;

said heat absorbing portion and said heat dissipating portion having liquid passages internally and being connected to form heat transfer loop;

said driving device and said heat dissipating portion being co-axially aligned and attached or fastened together. said means of physical connectionless between the driver and the receiver being of no physical direct contact between driving portion and impeller of the heat dissipating portion.

19. A pumpless liquid cooling system for removing heat from heat-generating components or systems as recited in claim 18 wherein said no direct contact between driving portion and liquid circulating impeller being realized by magnetic field force to transfer power from the driver to the receiver.