Nekuda kwekuti chikafu chakabikwa chiri muvacuum kutonhora modhi, iyo yekufambisa yekupisa nzira inoitwa kubva pachikafu chepamusoro kusvika pamusoro, saka kunaka kwenzvimbo yekudya hakuzoparadzwe mukupisa kwepamusoro, uye chikafu chakatonhodzwa chinova chitsva uye chakanyanya chewy. Mushure menguva vacuum pre-kutonhora inosvika kune yakadzikira tembiricha, iyo vacuum bhokisi reiyo pre-inotonhorera inosundirwa kunze kuti ipinde inotevera maitiro: vacuum kurongedza.
Chikafu chakabikwa vacuum pre-cooler chinhu chakanakira kutonhodza chikafu chepamusoro-tembiricha chakabikwa (sezvakarukwa, zvigadzirwa zvesoso, soups) kutonhora nekukasira uye zvakaenzana, uye nekunyatso bvisa utachiona hunokuvadza.