During　the　operation　of　an　air-cooled　refrigerator,　a　frost　layer　is　formed　on　the　surface　of　the　evaporator,　which　diminishes　the　cooling　capacity　and　coefficient　of　performance.　This　paper　reports　on　the　design　of　a　new　system　using　heat　storage　phase-change　materials　to　alleviate　the　above　problems.　The　new　system　not　only　uses　the　waste　heat　of　the　compressor　housing　to　defrost,　but　also　collects　the　heat　of　the　condenser　to　provide　domestic　hot　water,　without　the　need　for　additional　equipment　to　provide　heat.　Compared　with　electric　defrosting,　the　average　defrosting　time　and　average　total　energy　consumption　of　the　new　defrosting　method　are　reduced　by　37%　and　74.3%,　respectively,　and　the　temperature　fluctuation　in　the　freezer　is　also　weakened.　In　addition,　about　4.5　L　of　water　can　also　be　heated　to　the　temperature　of　domestic　hot　water　in　a　single　cycle,　saving　energy　costs.　Experimental　results　well　prove　the　superiority　of　the　new　system　in　existing　refrigerator　products.