Smoke alarms, also known as fire smoke alarms, smoke sensors, smoke sensors, etc. Generally, the independent, physical product battery-powered, or AC-powered battery is used as backup power, and the ready-made alarm can emit sound and light indications, which is called an independent smoke alarm.
1. The national legislative department can formulate corresponding regulations to compel the installation of smoke detectors in residential areas; in addition, the government participates in adjusting the price range of smoke detectors and provides appropriate subsidy policies so that ordinary families can afford them and are willing to buy them.
The smoke alarm cannot be turned off normally. As a safety protection device, it cannot be turned off manually. Only by breaking its alarm horn, or directly cutting off the power supply
Smoke alarms are essential security equipment for families. There are many news reports that there are no smoke alarms in the home, and the smoke and fire in the home cannot be detected in time to put out the fire, resulting in the house being burned. After the smoke alarm is installed, it is placed there. Usually there is no movement. Once there is an abnormal situation, smoke or fire will be detected.
Product classification: Smoke alarms are divided into ion smoke alarms, photoelectric smoke alarms, etc. from the sensors used.Ion smoke alarm: The ion smoke alarm has an ionization chamber. The radioactive element used in the ion chamber, americium 241 (Am241), has an intensity of about 0.8 microcurie. Under normal conditions, it is in a balanced state of the electric field. When smoke and dust enter the ionization chamber This balance relationship is destroyed, and the alarm circuit detects that the concentration exceeds the set threshold and sends an alarm.
The principle of the smoke alarm is that when the smoke enters the detector and causes the internal current balance (ion type) or the infrared receiving signal is abnormal (photoelectric type), an alarm signal will occur. If the detector is covered and the smoke cannot enter, it will not be detected. Smoke and dust, no alarm will occur.
1. Most wall breakers have their own heating function, so they have extremely high requirements on the quality of the stirring cup. It is recommended that you use a stirring cup made of high boron glass. In the case of high temperature, do not pour cold water and oil stains into the blender jar, otherwise the blender jar will burst due to expansion.
The meat grinder is a machine specially used to grind meat. It can grind all kinds of meat into minced meat or into silk. The wall breaker is a cooking machine, which can not only grind meat, but also grind soy milk, juice, etc. It can grind food very delicately and improve people's taste. The wall breaker can be said to be an upgraded version of the meat grinder, which not only has more functions, but also is more intelligent.
The meat grinder is generally used to grind meat and other flexible and firm vegetables. The fiber is more likely to be wrapped around the reamer, so vegetables such as green onions are not easy to grind, but ginger and garlic should be no problem. Industrial vegetables Usually a professional chopper is used.
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