冰箱除霜千万别用刀刮，3招教你安全除冰

Core Points - The article discusses the dangers of improper defrosting methods for refrigerators, particularly the risk of explosion due to the use of metal tools [2][9][11] - It highlights the sources of frost formation in refrigerators and provides preventive measures to avoid excessive frost buildup [4][6][7] Frost Formation Sources - Frost primarily comes from external air entering the refrigerator when the door is opened frequently or if the door seal is damaged, allowing moisture to condense [4][5] - The second source of frost is the moisture released from fruits and vegetables stored in the refrigerator, as well as from uncovered leftover food [6] Preventive Measures - To prevent frost buildup, it is recommended to minimize the frequency and duration of opening the refrigerator door [7] - Checking and replacing damaged door seals can significantly reduce moisture ingress [7] Safe Defrosting Methods - The article advises against using metal tools for defrosting, as this can damage the refrigerator's cooling system and lead to refrigerant leaks [9][10][11] - Recommended methods include unplugging the refrigerator and allowing ice to melt naturally, or using hot water to speed up the process [13][14] Safety Concerns - The use of flammable refrigerants like R600a poses a significant risk if leaks occur, as they can ignite and cause explosions [10][11] - Past incidents, such as explosions in ice cream shops and residential fires, underscore the importance of safe defrosting practices [10][11]