Title (en)

Heat pump

Title (de)

Wärmepumpe

Title (fr)

Pompe à chaleur

Publication

EP 0826935 A2 19980304 (EN)

Application

EP 97202616 A 19970826

Priority

NL 1003887 A 19960827

Abstract (en)

A heat pump comprises a tubular member (6; 18) forming a substantially closed loop with a compression and an expansion section for a working medium. Each of said sections cooperates with a heat exchanger (12, 16). In the operational state at least two floating plugs (10; 19) of a magnetic material are provided in the tubular member (6; 18), said plugs (10; 19) enclosing a gas bubble and/or liquid sample of the working medium. The heat pump further comprises electromagnetic means along at least a part of said tubular member (6; 18) for generating a moving magnetic field to control the movement of the plugs (10; 19) in said tubular member (6; 18). The plugs (10; 19) are formed by a magnetic fluid. <IMAGE>

IPC 1-7

F25B 30/02; F04B 39/00; F04C 18/063

IPC 8 full level

F04B 39/00 (2006.01); F25B 30/02 (2006.01)

CPC (source: EP)

F04B 39/0011 (2013.01); F25B 30/02 (2013.01); F25B 2309/1401 (2013.01)

Citation (applicant)

• DE 3607976 A1 19871001 - SCHOENELL JUERGEN
• US 5147573 A 19920915 - CHAGNON MARK S [US], et al
• US 5064550 A 19911112 - WYMAN JOHN E [US]
• US 4938886 A 19900703 - LINDSTEN GOERAN R [SE], et al

Designated contracting state (EPC)

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

DOCDB simple family (publication)

EP 0826935 A2 19980304; NL 1003887 C2 19980303

DOCDB simple family (application)

EP 97202616 A 19970826; NL 1003887 A 19960827