Global Patent Index - EP 1008821 A1

EP 1008821 A1 2000-06-14 - Device for heat transfer by compression and expansion of gases

Title (en)

Device for heat transfer by compression and expansion of gases

Title (de)

Vorrichtung zum Wärmeaustausch mittels Verdichtung und Ausdehnung von Gasen

Title (fr)

Dispositif pour le transfert de chaleur par compression et expansion de gaz

Publication

EP 1008821 A1 (EN)

Application

EP 98870269 A

Priority

EP 98870269 A

Abstract (en)

A heat transfer device comprises two sub-systems, separated by a movable element, for instance a piston (P). The first sub-system is near the element (1) to be cooled and in thermal contact with said element (1) and comprises a first chamber (4) comprising a saturated gas, the second sub-system comprises a second chamber (18) in thermal contact with a cooled surface, the first and second chamber (4,18) being separated by the movable element (P). In the second chamber (18) a second gas is present which condenses on a cold surface when the second gas is pressurized by the movable element (P). Conduits lead the condensed liquid towards the element (1) to be cooled. The liquid evaporates in a third chamber (3) in thermal contact with the element (1) to be cooled and the first chamber (4). This preferred embodiment enables in a simple, yet efficient and reliable manner to provide a movable element (P) which separates the two gases, while also moving with little friction. <IMAGE>

IPC 1-7 (main, further and additional classification)

F25B 25/00

IPC 8 full level (invention and additional information)

F25B 23/00 (2006.01); F25B 25/00 (2006.01)

CPC (invention and additional information)

F25B 23/006 (2013.01); F25B 25/005 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1008821 A1 20000614

INPADOC legal status


2001-10-24 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20001215

2001-03-29 [REG DE 8566] DESIGNATED COUNTRY DE NOT LONGER VALID

2001-02-21 [AKX] PAYMENT OF DESIGNATION FEES

2000-06-14 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-06-14 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI