Technical requirements include: normal working environment, safety, hygiene of parts in contact with food, structural and appearance requirements, performance requirements (actual volume, timing accuracy, thermal efficiency, handle strength, salt spray corrosion resistance, abnormal operation, operating temperature characteristics ), environmental adaptability (high temperature resistance, low temperature resistance), life requirements, etc. The test method specifies the general conditions for the test, measuring instruments/instruments used for the test, safety requirements, hygienic testing of parts in contact with food, structural and appearance inspection, performance testing (actual volume determination, thermal efficiency determination, timing deviation, handle strength, salt spray resistance Corrosion test, abnormal working test, working temperature characteristics), environmental adaptability (high temperature resistance test, low temperature resistance test), life test (full set life test, button/switch life test),