Winter is coming! The smog is coming!
The damage that smog can bring should not be said more. Many netizens must also have plans to purchase an air purifier. However, there are too many tricks on the market, and I feel dizzy when I look at the circle. Together with the propaganda of the owner, every one can't wait to say that the purification effect is 99%+. I don't know which one to pick.
But don't worry, after reading the video below, you may not be entangled in how to choose.
Hey, boy, please stay, don't think it's over here. Before the double eleven carnival, first understand the following six knowledge points, maybe you can help you rationally pull the grass~
Is the purification effect good?
Just looking at the video's little friends, I must have learned a point of knowledge. When buying an air purifier, the first thing to focus on is the clean air volume (CADR), which is how much clean air the machine can provide per unit of time. .
This indicator is not from the sky. In our new national standard GB/T18801-2015 "Air Purifier" (implemented on March 1, 2016), the clean air volume (CADR), cumulative purification (CCM), energy Consumption and noise are the four main performance indicators of air purifiers.
It is also based on the new national standard. In October 2016, the special inspection results of the national supervision of product quality conducted by the General Administration of Quality Supervision, Inspection and Quarantine were announced for the first time, replacing the previous ones only indicating that the qualifications were unqualified. The CADR value test champion is the Pro L air purifier from the Swedish brand Blueair.
In the case of severe haze, the larger the room area, the larger the volume of air that needs to be purified indoors. If the CADR value of the purifier you buy is too small, the speed of purifying the air will not catch up with the infiltration of outdoor particulate matter and pollution from indoor pollution sources. The speed will lead to high indoor particulate matter concentration.
Is the data source really not true?
According to the idea that the larger the CADR value is, the direct choice of CADR is not good. That can only say that you are still too naive!
Although it is stipulated in the new national standard to indicate the CADR value, some manufacturers may still have a "self-production self-test" situation. So the source of the data is very important! An air purifier that selects a professional organization for testing is reliable and convincing.
When it comes to third-party testing, there are some very strict testing institutions in China, such as China Household Electrical Appliances Testing Institute, Shanghai Environmental Protection Product Quality Supervision and Inspection Station, and Guangzhou Industrial Microbiology Testing Center, which are relatively reliable and convincing. The most famous foreign country is the American Household Electrical Appliances Manufacturers Association (AHAM), which is a third-party independent testing institution that is recognized internationally as the authoritative authority to test and evaluate the performance of air purifiers.
Weighing display is an instrument that displays the mass and weighing status of the weighed object in electronic instrument. Weighing display is originally analog indicator type, which consists of error amplifier, reversible motor, balance Bridge, excitation power supply, Dial, Pointer and other parts, and works according to the principle of automatic balance electronic potentiometer. It has slow weighing speed, single function and low accuracy, and has been basically eliminated now. The current weighing display is digital display.
Weighing indicator ,Digit Weighing indicator,Weight Force Indicator,Platform Scale Weighing Indicator,Analog weighing indicator,Weighing display
Ningbo Santwell Imp & Exp Co.,Ltd , https://www.santwell.com