With the recent general rise in national temperatures, spring has quietly arrived, and it also indicates that summer is getting closer and closer to us. As a sophisticated electronic smart home appliance, how to maintain and maintain a smart vacuum cleaner in the summer is particularly important. Dad is happy to introduce relevant knowledge for everyone today, for the reference of the majority of users.
The effect of high temperature in summer on smart vacuum cleaner
The power supply system of the intelligent vacuum cleaner is mainly nickel-hydrogen battery (Ni-MH), nickel-cadmium battery (Ni-Cd) and lithium polymer battery (Li-polymer). Among them, the lithium polymer battery is most sensitive to the ambient temperature during charging, and it is recommended to use it as much as possible under the ambient temperature of 35 degrees Celsius (the same below). If the battery is charged or used at an ambient temperature higher than 40 degrees, the battery capacity will experience a slow continuous wear loss, and in the environment of more than 60 degrees, the lithium polymer battery will quickly swell and be scrapped (commonly known as the big belly). Lithium polymer batteries generally do not explode). At present, mainstream smart vacuum cleaners use mature nickel-metal hydride or nickel-cadmium batteries (nickel-cadmium batteries are about to be eliminated due to memory effects and highly toxic properties). These two batteries can be safely used below 45 degrees, but If the temperature rises further, the electrolyte solution inside the battery will have a side reaction and generate a large amount of gas, causing the internal pressure of the battery to rise. Even if the gas overflows through the battery safety valve, the battery will lose water, and the internal resistance will increase the capacity seriously until it cannot be used. However, it directly causes battery damage caused by battery explosion.
iRobot Roomba NiMH battery
Figure: iRobot Roomba 14.4V 3000mah NiMH Battery Pack (Roomba 500/700 Series)
Summer high temperature has different degrees of influence on various motors inside the smart vacuum cleaner, such as vacuum motor, wheel motor, side brush motor, roller brush motor, etc., and the motor coil is blown due to the use of high temperature environment. . At the same time, it can accelerate the aging speed of various sensing components such as infrared detectors and other electronic components, which will affect the overall service life of the product and increase the probability of product failure.
Responses
1. Staggered high temperature period: In the summer, the intelligent vacuum cleaner should avoid cleaning and charging during the high temperature period from 12:00 to 17:00. If you choose a timing function model, it is recommended that you change the cleaning time to use in the morning or evening.
2, reduce the cleaning frequency: summer air humidity is high, the dust in the air is not easy to rise, there is no winter cotton wool and other dirt, so it is recommended that you clean the schedule of the smart vacuum cleaner once a day, change to 2-3 days 1 The times are very reasonable.
3. If you want to go out for a period of time in the summer and can't use the smart vacuum cleaner, it is recommended that the user remove the battery after fully charging, and then pack the battery layer with waterproof material and put it in the refrigerator freezer. Because the high temperature in summer increases the chemical reaction speed of the battery, it will greatly speed up the self-discharge rate of the battery. If the battery is removed and placed in an environment of 35 degrees or more, the battery will self-discharge at a very fast rate. Scrapped due to overdischarge.
4. When extreme weather conditions occur, stop using the smart vacuum cleaner. For example, in 2011, there was a large-scale continuous high temperature of more than 40 degrees in the south for a long time. In this case, Dad easily and strongly recommended that the user suspend use.
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