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US005115859A
United States Patent [19] [li] Patent Number: 5,115,859
Roebelen, Jr. et al. [45] Date of Patent: May 26, 1992
[54] REGENERABLE NON-VENTING COOLER FOR PROTECTIVE SUIT
[75] Inventors: George J. Roebelen, Jr.; Stephen A.
Bayes, both of Suffield. Conn.
[73] Assignee: United Technologies Corporation, Hartford, Conn.
[21] Appl. No.: 633,570
[22] Filed: Dec. 21, 1990
[51] Int. CI.5 F28D 20/00; F25B 21/02
[52] U.S. CI 165/10; 165/104.11;
165/101; 62/259.3; 62/3.62; 62/3.7
[58] Field of Search 165/10, 104.11, 101,
165/103; 62/430, 3.5, 3.62, 3.7, 259.3, 3.2
[56] References Cited
U.S. PATENT DOCUMENTS
2.191.198 2/1940 Gould 62/430
3.085.405 4/1963 Frantti 62/3
3.154.926 11/1964 Hirschhorn 62/3
3.156.101 11/1964 McGuffy 62/430
4.127.161 11/1978 Clv'neetal 165/104.11
4.291.750 9/1981 Clyne et al 165/104.11
4.405.348 9/1983 Pasternack 62/259.3
4.459.822 7/1984 Pasiernack 62/259.3
FOREIGN PATENT DOCUMENTS
OTHER PUBLICATIONS
Ser. No. 07/593.599 Filed Oct. 4, 1990. Space Suit
Cooling Apparatus, Applicants: Stephen A. Bayes and
George J. Roebelen, Jr.
Primary Examiner—Albert W. Davis, Jr.
Attorney, Agent, or Firm—William W. Habelt
[57] ABSTRACT
A life support back pack 14 for use during extravehicular activity in space incorporates a cooling apparatus 20 comprised of five panels 22 each of which include in layered fashion a LCG coolant heat exchange coil 32, a heat distribution plate 42, and a heat dissipation module 50A or 50B having an outer radiator surface 52. Each module 50A houses a first phase change material 55A, for example hexadecane paraffin, and each module 50B houses a second phase change material 55B, for example tetradecane paraffin, which has a phase change temperature which is less than the phase change temperature of the first phase change material 55A. The cooling apparatus 20 is equipped with a coolant heat exchange circuit provided with mode selection valves 84 and 86 which are operated by a controller 88 to selectively direct the LCG coolant to be cooled through the cooling apparatus in one of three operating modes.
