Household micro projectors are used in homes and similar places. Also known as civil appliances, household appliances. The United States is the driving ground for household appliances. In 1879, American TA Edison invented incandescent lamps. Created an era of household electricity. At the beginning of the 20th century, the electric iron invented by E. Richardson of the United States was put on the market, prompting other household appliances to come out one after another. Vacuum cleaners, electric washing machines, compressor-type household refrigerators, electric stoves, air conditioners, and fully automatic washing machines came into being. In the 1880s, the discovery of the Edison effect and the experiment to verify the existence of electromagnetic waves created conditions for the birth of electronics. At the beginning of the 20th century, Britain, the United States and other countries successively invented the first generation of electronic devices - electron tubes.
The introduction of the superheterodyne receiver in 1919 created conditions for the development of the radio. From 1923 to 1924, VK Zvolegin invented the camera tube and picture tube in the United States. In 1931, it was assembled into the world's first all-electronic TV system. In 1954, the United States began to use color television broadcasting. Magnetic (wire) tape recorders and tape recorders were introduced in 1898 and 1935. On the basis of the invention of cassette tapes by Philips in the Netherlands in 1963, cassette tape recorders became popular. The invention of integrated circuits has enabled electronic technology to enter the era of microelectronics technology, bringing home appliances to a new level.
The classification method of household appliances and household appliances has not been unified in the world. However, it is more common to classify the functions and uses of products, and is roughly classified into 8 categories. 1 refrigeration appliances. Including household refrigerators, cold drinks machines, etc. 2 air conditioners. Including room air conditioners, fans, ventilation fans, hot and cold air, air dehumidifiers, etc. 3 Clean the appliance. Including washing machines, clothes dryers, electric irons, vacuum cleaners, floor waxing machines, etc. 4 kitchen appliances. Including electric cookers, microwave ovens, induction cooktops, electric ovens, rice cookers, dishwashers, electric water heaters, food processing machines, etc. 5 electric heating appliances. Including electric blankets, electric heating, water blankets, electric heating suits, space heaters. 6 plastic surgery appliances. Including electric razors, hair dryers, hair styling machines, ultrasonic cleaners, electric massagers. 7 audio appliances. Including pico projectors, televisions, radios, recorders, video recorders, video cameras, stereos, etc. 8 other electrical appliances, such as fire alarms, electric bells, etc.
With the improvement of life, water purifiers have become a member of household appliances. More and more families are using this new type of electrical products: as most of the world's water bodies are seriously polluted, the contradiction of water shortage is aggravated. . Traditional tap water treatment methods cannot guarantee the provision of high quality drinking water, and there are secondary pollution problems in municipal water supply, such as high-level water tank water supply and long tap water pipeline, which will cause potential rust and sediment. And pollution problems such as microorganisms. Therefore, various brands of water purifiers have emerged, and the filtration methods and filter materials used in various water purifiers are also different. Among them, domestically produced natural and beautiful brand water purifier products meet the national drinking water standards.
Household appliances, referred to as home appliances, refer to appliances that are driven by electrical energy (or mechanized) to help perform household chores such as foraging, food preservation or cleaning. In addition to the home environment, they can also be used for company codes or In an industrial environment. Basically, household appliances are divided into large household appliances (white goods, black household appliances) and small household appliances.
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