METHOD AND ARRANGEMENT

摘要

PCT No. PCT/SE89/00621 Sec. 371 Date Jun. 18, 1991 Sec. 102(e) Date Jun. 18, 1991 PCT Filed Oct. 31, 1989 PCT Pub. No. WO90/05277 PCT Pub. Date May 17, 1990.A method and arrangement for enforced heat transmission between a solid or liquid alimentary body and an ambient gas takes place in connection with cooling/freezing or when cooking, frying or drying the entire part or parts of the alimentary body. This method and arrangement uses a low-frequency standing sound wave. The apparatus uses a low-frequency sound generator having a pulsator part and a resonator part. The resonator part is acoustically virtually closed and is designed so that the alimentary body, which is to be exposed to enforced heat transmission, is located within a zone inside the resonator part where the standing sound wave has a particle velocity anti-node.