Household appliances (home appliances) are all electrical products that apply to households or similar conditions (meaning smaller social units such as kindergartens, schools, hospitals, playgrounds and offices) or are used by individuals。
9. 3. 1 classification, variety and characteristics of household appliances
Classification of household appliances
The current variety of household electricity is close to 1,000, with tens of thousands of specifications and many classifications。
(1) classification of domestic electricity by chinese merchants
Chinese businesses broadly divide domestic appliances into seven broad categories。
1 electrical thermal appliances, including electric stoves, electric winding and ironing。
2 cooking appliances, including electric cookers, microwave stoves, electromagnetic stoves and electric fire pans。
3 electrical appliances, such as washing machines, vacuum cleaners, air cleaners, gas filters and dishwashers。
Electronic devices such as electronic clocks, spreadsheets, calculators, refrigerators, telephones, electrons, electric toys and electronic cameras。
5 audio-visual devices such as radios, recorders, colour televisions, video recorders, radios and sound systems。
Lighting devices, such as light control, chandeliers, chandeliers, walllights, landing lamps, headlights and truncators for various types of lamps, and so forth。
Refrigeration equipment such as refrigerators, air conditioners, electric fans and various refrigeration containers。
(2) classification used in the united states
In the united states, a mixed classification is used, for a total of seven major categories。
1 large appliances。
2 small pieces of equipment。
3 air conditioners。
4 e-consumption equipment for domestic use。
5. Electrical equipment for office operations。
Equipment for commercial and public facilities。
7 sale of goods and currency equipment。
Large appliances in the above classification refer to washing machines, dishwashers, refrigerators, microwave stoves, etc., and small appliances refer to small portable products such as electric fans, vacuum cleaners, coffeepots and electric thermal blankets。
(3) classification by price
People use electricity, also known as durable household electricity, usually means appliances worth more than $1,000, which can be used for more than two years。
Small household electricity, i. E. Household electricity products other than durable household electricity。
(4) classification from the perspective of the software and hardware used
Pure hardware type appliances, i. E. Household appliances that can work by opening the power source, generally refer to appliances that do not require software or software solidified, such as washing machines and electrical products。
Hardware and social media appliances, such as radios and televisions. Radio and television stations are required to work, so such appliances need to be sensitive to local conditions of use and to the availability of radio and television stations. For example, fm radios have nearly 10 radio stations in large cities, and there may not be a radio station in rural or marginal areas; ntsc-style televisions in the 1980s could not be used in china。
Hardware and software appliances, such as video recorders, computers。
Hardware and network-type power sources, such as digital television caps。
(5) classification by type of installation
Flying appliances, such as caps, must be reliable。
Wall-mounted appliances, with small land area, large area and good visual effects. For example, wall-mounted television, wall-walled telephones and wall-walled air conditioning。
Landing appliances, which are generally heavy and suitable for placement on the ground. For ease of operation, panels are generally up or higher。
Desktop appliances, generally lightweight. For example, desktop computers and general television sets。
Mobile, e. G. Mobile air conditioners, vacuum cleaners. Power lines are required to be bypassed。
Portable (pocket) e. G. Sanbao, mp3/md, pager/phone, handheld computer. It includes wrists, necks。
More built-in appliances will be available in the future。
(6) classification by intelligence
No smart appliances such as switches and light bulbs。
A small number of smart appliances, such as paint and washing machines。
Smart appliances, like computers。
(7) generation of electricity
Grandfather: lights, flashlights。
Old generation: recorders, radios, fans。
Older generation: washing machines, refrigerators, electric fans。
New generation: a new generation of household electrical products represented by household computers (composed of the pc entertainment centre), combinations of sound, video discs (composed of the video recreation centre)。
Universal generation: large screen display devices such as lcd projector, digital ac3 sound system, digital video, photographic equipment。
In the future, household electricity will evolve in the direction of manual skills, three-dimensional imagery and multimedia。
Characteristics of household appliances
1) applicable is the performance of household appliances suitable for their use, such as refrigeration of refrigerators and washing of washing machines。
2) safety is the primary quality indicator for household appliances and refers to the degree to which people are safe from hazards when using them. Safety includes the prevention of physical exposure to electricity, the prevention of excessive temperatures, the prevention of mechanical hazards, the prevention of toxic and harmful gases, the protection against radiation hazards and the prevention of dangerous properties such as fires and explosions。
3) reliability, requiring an average non-facility period and easy maintenance。
4) durable, requiring solid and durable product structure。
5) cheapness, which is a common requirement of most consumers of electricity, is an important means for producers to expand their markets。
6) appearance formation, which requires the appearance of the product and the harmony of its tone, both functional and decorative。
9. 3. 2 features of the u-disk and identification of selected purchases
1. Characteristics of disks
U-disk is a usb device using flash memory (also known as flash) storage technology. Usb is a common serial interface named after the first letter u, so the short u-disk. The u-disk has the following advantages。
1) high capacity. U disk capacity far exceeds the previous generation 's storage diskette, with a diskette capacity of only about 1. 44mb, while u disk capacity ranges from 64mb to the current 1gb, 2gb or even 8gb。
