Remedies to prevent cracking in a liquid system

• US 7,344,363 B2
• Filed: 04/20/2005
• Issued: 03/18/2008
• Est. Priority Date: 01/31/2003
• Status: Expired due to Term

• Current Assignee: Vertiv Corporation (Vertiv Holdings Co.)
• Original Assignee: Cooligy Incorporated (Emerson Electric Company)
• Inventors: Corbin, David, Munch, Mark, Zeng, Shulin, Goodson, Kenneth, Kenny, Thomas W., Shook, James Gill
• Primary Examiner(s): Jiang; Chen Wen
• Application Number:
  US11/111,520
• Publication Number:
  US 20050183445A1
• Time in Patent Office: 1,063 Days
• Field of Search: 138/27, 138/28, 138/32, 92/89, 92/90, 92/91, 92/92, 92/93, 921/03.R, 417/472, 417/474, 417/481, 220/720, 220/721
• US Class Current: 417/481
• CPC Class Codes: F04B 17/00 Pumps characterised by combination with, or adaptation to, specific driving engines or motors
• CPC Class Codes: F28D 15/00 Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies F28D17/00, F28D19/00, F28D20/00 take precedence
• CPC Class Codes: F28F 19/006 Preventing deposits of ice
• CPC Class Codes: F28F 2245/02 hydrophilic
• CPC Class Codes: F28F 2250/08 Fluid driving means, e.g. pumps, fans
• 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 liquid cooling system utilizing minimal size and volume enclosures, air pockets, compressible objects, and flexible objects is provided to protect against expansion of water-based solutions when frozen. In such a system, pipes, pumps, and heat exchangers are designed to prevent cracking of their enclosures and chambers. Also described are methods of preventing cracking in a liquid cooling system. In all these cases, the system must be designed to tolerate expansion when water is frozen.

Claims

1. An apparatus for preventing cracking of a liquid system, comprising:

a housing for holding liquid having at least one inlet chamber and at least one outlet chamber structure separate from the at least one inlet chamber; and

at least one flexible object coupled to form a portion of at least one wall of the inlet and outlet chambers such that pressure exerted on the flexible object increases a volume of the housing;

wherein at least a remaining portion of the at least one wall of the inlet chamber and the outlet chamber is rigid.

2. The apparatus of claim 1, wherein the flexible object accommodates a predetermined level of fluid expansion.

3. The apparatus of claim 2, wherein the predetermined level of fluid expansion is between 5 to 25 percent.

4. The apparatus of claim 1, wherein the flexible object being capable of contracting and expanding between a minimum volume condition and a maximum volume condition.

5. The apparatus of claim 1, wherein the flexible object being secured within the inlet and outlet chambers.

6. The apparatus of claim 1, wherein the flexible object is made of one of the following:

rubber, plastic or foam.

7. A method of preventing cracking of a liquid system, the method comprising the steps of:

providing a housing for holding liquid having at least one inlet chamber and at least one outlet chamber separate from the at least one inlet chamber; and

disposing at least one flexible object to form a portion of at least one of the inlet and outlet chambers, a remaining portion of said chamber being rigid, such that pressure exerted on the flexible object increases a volume of the housing, the flexible objects accommodating a predetermined level of fluid expansion.

8. The method of claim 7, wherein the predetermined level of fluid expansion is between 5 to 25 percent.

9. The method of claim 7, wherein the flexible object being capable of contracting and expanding between a minimum volume condition and a maximum volume condition.

10. The method of claim 7, wherein the flexible object is made of one of the following:

rubber, plastic or foam.

11. An apparatus for preventing cracking in a pump, comprising:

a housing having at least one inlet chamber and at least one outlet chamber separate from the at least one inlet chamber; and

a plurality of spaced apart flexible objects coupled to form a portion of at least one wall of the housing such that pressure exerted on the plurality of spaced apart flexible objects increases a volume of the housing.

12. The apparatus of claim 11, wherein the flexible objects accommodate a predetermined level of fluid expansion.

13. The apparatus of claim 12, wherein the predetermined level of fluid expansion is between 5 to 25 percent.

14. The apparatus of claim 11, wherein the flexible objects being capable of contracting and expanding between a minimum volume condition and a maximum volume condition.

15. The apparatus of claim 11, wherein the pump is electro-osmotic.

16. The apparatus of claim 11, wherein the flexible objects are made of elastomer hinges.

17. The apparatus of claim 11, wherein the flexible objects are made of one of the following:

plastic, rubber, or foam.

18. The apparatus of claim 11, wherein the flexible objects are fastened to rigid plates of the housing.

19. A method of preventing cracking in a pump, the method comprising the steps of:

providing a housing having at least one inlet chamber and at least one outlet chamber separate from the at least one inlet chamber; and

disposing a plurality of spaced apart flexible objects to form at least one wall of the housing such that pressure exerted on the plurality of spaced apart flexible objects increase a volume of the housing, the plurality of spaced apart flexible objects accommodating a predetermined level of fluid expansion.

20. The method of claim 19, wherein the predetermined level of fluid expansion is between 5 to 25 percent.

21. The method of claim 19, wherein the flexible objects being capable of contracting and expanding between a minimum volume condition and a maximum volume condition.

22. The method of claim 19, wherein the pump is electro-osmotic.

23. The method of claim 19, wherein the flexible objects are made of elastomer hinges.

24. The method of claim 19, wherein the flexible objects are made of one of the following:

plastic, rubber or foam.

25. The method of claim 19, wherein the flexible objects are fastened to rigid plates of the housing.