In the economic developed countries such as Japan and Europe and the United States in the 1970s, it was used in public places to prevent secondary pollution after washing hands and to avoid infection of diseases, but the water-saving function was not taken seriously. However, due to the immature sensor faucet technology at the time, it was not smooth in the process of development and popularization. Initial defects: 1. Large size, unsightly appearance, AC power supply, inconvenient installation, power supply and water contact may have electric shock. 2. Cannot be used in case of power failure or unstable voltage. 3. Infrared sensing is susceptible to background light and direct sunlight, resulting in running water in a non-use state. 4, the reaction is slow, open too slowly in use, and the water is too slow after use. 5, DC power supply induction faucet battery life is short, the battery must be replaced frequently, due to the design of the battery box structure, the replacement of the battery is not convenient, causing certain problems for the manager. 6. The components of the faucet are not modular, and the development and production costs are high. 7. People use strangers to infrared sensor faucets, and human damage is serious. Due to the above-mentioned numerous defects, it has caused a bad influence on consumption to a certain extent, and the promotion of infrared sensor faucets has been frustrated to some extent. Improvements since the 1990s: 1. The power supply is developed from AC power to DC power supply. From DC6V and 4.5V alkaline batteries to the current lithium battery 6V and 4.5V, the use of alkaline batteries reduces environmental pollution and eliminates people's doubts about using AC power. 2. The structure of the water valve has been greatly improved, and it has the advantages of simple structure, compactness, pressure resistance, disassembly, and easy maintenance. At the same time, it has functions such as filtering and non-return, which is fast on and off, and consumes very little power. 3. The infrared control block is widely controlled by chip soldering electronic components and microcomputer program, which greatly reduces the size of the infrared control block, and has the advantages of micro power consumption, waterproof and high temperature resistance. Due to the adoption of digital technology, the peripheral circuit is simplified, the function adjustment is convenient, and the development and production costs are reduced. 4. Due to the compact structure of the water valve and the induction control block of the induction faucet, the appearance design is more and more beautiful, and it has gradually become a beautiful landscape in people's lives. As China's induction faucet production gradually embarked on modularization and standardization, the quality of induction faucets has been greatly improved, production costs have fallen sharply, and people's quality of life has improved. The future of sensible faucets will be popularized in people's lives. Application location: Induction faucet is a common water-saving product for public toilets at present. It is especially suitable for cities with water shortage in China. Since there is no need for direct contact with hands, the sensor faucet can effectively prevent cross-infection of bacteria such as SARS and children's hand, foot and mouth disease, suitable for people. Traffic-intensive public places, such as train stations, airports, bus stations, colleges and universities.
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