The compressor na iska mai free-oil yana cikin micro compressor piston. Ka'idar aikinsa ita ce lokacin da motar ke motsa injin murɗawa don juyawa, ta hanyar watsa sandar haɗawa, piston tare da lubrication kai ba tare da ƙara wani man shafawa zai yi motsi mai jujjuyawa ba, da ƙarar aiki wanda ya ƙunshi bangon ciki na silinda, kan silinda da saman saman piston zai canza lokaci -lokaci. Lokacin da piston na compressor piston ya fara motsawa daga kan silinda, ƙarar aiki a cikin silinda sannu a hankali yana ƙaruwa. A wannan lokacin, iskar gas tana tura bawul ɗin shigarwa tare da bututun shiga kuma yana shiga cikin silinda har sai ƙarar aiki ta kai matsakaiciya, kuma an rufe bawul ɗin shiga; Lokacin da piston na compressor ke motsawa a cikin kishiyar, ƙarar aiki a cikin silinda yana raguwa kuma matsin gas yana ƙaruwa. Lokacin da matsin lamba a cikin silinda ya kai kuma ya ɗan fi girma fiye da matsin lamba, bawul ɗin fitarwa yana buɗewa kuma ana fitar da gas daga silinda har sai piston ya matsa zuwa matsakaicin matsayi, kuma bawul ɗin rufewa ya rufe. Lokacin da piston na komputar piston ya sake motsawa zuwa sabanin haka, tsarin da ke sama yana maimaitawa. Wato, ƙwanƙarar murhun piston ɗin yana juyawa sau ɗaya, piston yana maimaitawa sau ɗaya, kuma tsarin cin abinci, matsawa da fitar da hayaƙi ana samun su a jere a cikin silinda, wato an kammala zagayowar aiki. Tsarin tsari na shaft guda ɗaya da silinda biyu yana sa iskar gas ta compressor sau biyu na silinda ɗaya a wani ƙimar da aka ƙaddara, kuma an sarrafa shi sosai a cikin girgiza da sarrafa amo.