1、 Classified by the purpose of household appliances
（1） Air conditioning appliances are mainly used to regulate indoor air temperature, humidity, and filter air, such as electric fans, air conditioners, air cleaners, etc.
（2） Refrigeration appliances use their affiliated unit devices to generate low temperatures for cooling and preserving food and beverages, such as refrigerators, cold drink machines, refrigeration machines, ice cream machines, etc.
（3） Cleaning appliances are used for personal clothing, indoor environment cleaning and washing, such as washing machines, dryers, showers, smoking machines, exhaust fans, vacuum cleaners, floor waxing machines, window cleaning machines, etc.
（4） Ironing tools are used for ironing clothes, such as electric irons, ironing machines, ironing presses, etc.
（5） Heating appliances use electric heating elements to convert electrical energy into heat energy for people to keep warm, such as space heaters, electric blankets, etc.
（6） Small household appliances used for body health care, such as electric massagers, massage cushions, air negative ion generators, hypnotics, pulse therapy devices, etc.
（7） Plastic surgery tools are used to decorate people's faces, such as hair dryers, electric clippers, electric shavers, multi-purpose hairdressers, hair dryers, and facial trimmers.
（8） Lighting fixtures include various indoor lighting and artistic decoration lamps, such as various indoor lighting fixtures, ballasts, starters, etc.
（9） Household electronic appliances refer to electronic products used by households and individuals, which have a wide range of categories and varieties. Mainly including the following categories: audio products such as radios, recorders, combination speakers, record players, etc; Video products: such as televisions, video recorders, etc; Timekeeping products: such as electronic watches, electronic clocks, etc; Computing products: such as calculators, home electronic computers, home computer learning machines, etc; Entertainment products: such as electronic toys, electronic musical instruments, electronic game consoles, etc; Other household electronic products: such as electronic humans, home communication products, healthcare products, etc.
（10） Kitchen appliances are electrical appliances used for food preparation, utensil cleaning, food preparation, cooking, etc., such as rice cookers, hotpot ovens, ovens, microwaves, induction cookers, can openers, mixers, meat grinders, dishwashers, juicers, etc.

2、 Classified by electric shock protection methods for household appliances
（1） Class O electrical appliances rely on basic insulation to prevent electric shock hazards. They do not have grounding protection and are generally used in places with good working environments.
（2） OI electrical appliances have at least basic insulation and grounding terminals. The power cord does not have a grounding wire, and the plug does not have a grounding pin. It cannot be inserted into a grounded power socket. At present, most domestically produced household electric washing machines are OI type appliances.
（3） The anti electric shock protection of Class I electrical appliances not only relies on basic insulation, but also has an additional preventive measure. The method is to connect the easily accessible conductive parts with the protective grounding wire installed in the fixed line, so that the easily accessible conductive parts do not become live when the basic insulation is damaged. For example, domestic refrigerators are mostly Class I appliances.
（4） Class II electrical appliances not only rely on basic insulation for electric shock protection, but also have additional safety precautions. The method is to use double insulation or reinforced insulation structure, but without protective grounding or measures relying on installation conditions. For example, domestically produced electric blankets are mostly Class II electrical appliances.
（5） In terms of electric shock protection, Class III electrical appliances rely on safe ultra-low voltage power supply, and at the same time, no voltage higher than the safe ultra-low voltage will be generated in any part of the circuit.
（1） Audio and video products: 1. TV 2. Audio (excluding portable devices) 3. VCD/DVD
（2） Kitchen appliances 1. Refrigerator 2. Microwave 3. Range hood 4. Disinfectant cupboard 5. Electronic stove 6. Dishwasher
（3） Home appliances 1. Washing machine 2. Air conditioner 3. Vacuum cleaner 4. Water heater
（4） Home communication products (excluding mobile phones) 1. Telephone 2. Cordless telephone (5) Small household appliances.