There are the following types of household appliances: ① refrigeration appliances, including household refrigerators and cold drinks machines. ② Air conditioners, including room air conditioners, electric fans, ventilation fans, cold and hot fans, air dehumidifiers, cold fans, humidifiers, etc. ③ Cleaning electrical appliances, including washing machines, clothes dryers, electric irons, vacuum cleaners, floor polishers, sweeping robots, etc. ④ Kitchen appliances, including electric cookers, microwave ovens, induction cookers, electric ovens, rice cookers, dishwashers, electric water heaters, food processors, etc. ⑤ Electric heaters, including electric blankets, electric quilts, hydrothermal blankets, electric clothes and space heaters. ⑥ Beauty care appliances, including electric shavers, hair dryers, hair trimmers, ultrasonic face washers and electric massagers. ⑦ Audio-visual appliances, including mini-projector, TV sets, radios, tape recorders, video recorders, video cameras, stereos, etc. ⑧ Other electrical appliances, such as fireworks alarms and electric bells.