Lo mshini wakhiwe ngesitsha, ama-paddles anyakazayo kanye nezingxenye zesikhashana;I-screw paddle ngokuvamile yenziwa ungqimba olu-1 noma izingqimba ezi-3, ukuhlangana kwesikulufu sangaphandle kuyisici esiphakathi nendawo ezinhlangothini ezimbili, futhi ungqimba olungaphakathi lwesikuluufu ludlulisela okubalulekile ezinhlangothini ezimbili ukusuka enkabeni, ukuze kwakheke ukuxubana kwe-convection。I-cubage ingenziwa ibe yi- rounity, ngakho-ke ibhantshi ingadlalwa ngokusabela kanye nokomisa。