(19)

(11)

EP 0 552 146 A1

(12)

(43) Date of publication: 28.07.1993 Bulletin 1993/30 (21) Application number: 90917209.0 (22) Date of filing: 09.10.1990

(51) International Patent Classification (IPC):  F04D 29/ 70( . ) F25D 17/ 06( . ) F28F 17/ 00( . ) F04D 29/ 60( . ) F25D 21/ 06( . ) (86) International application number: PCT/SE1990/000647 (87) International publication number: WO 1992/006303 (16.04.1992 Gazette 1992/09)

(84) Designated Contracting States: AT BE DE DK FR GB IT LU NL SE (71) Applicant: Frigoscandia Food Process Systems Aktiebolag S-251 09 Helsingborg (SE)	(72) Inventors: LÖFKVIST, Christer S-253 72 Helsingborg (SE) LUNDQVIST, Thomas S-253 74 Helsingborg (SE) (74) Representative: Berglund, Gustav Arthur, et al  AWAPATENT AB, Berga Allé 1 S-254 52 Helsingborg S-254 52 Helsingborg (SE)