What is the CADR value of the air purifier? Air purifier’s various parameters detailed [PConline truth-seeking laboratory] at 7:30 on November 7th, Lao Luo held a press conference of hammer technology, as well as the conference of the crosstalk version, which is not only a mobile phone. In addition to the release of nuts Pro 2 smart phone, it also brings an air purifier: Breathing smart air purifier. The new nut Pro technology media have already said enough, we are interested in the truth laboratory is the air cleaner introduced later, Lao Luo lists CADR value can reach 800+, we will talk to you about what the air purification products performance parameters on earth?
The air purifier is almost unknown in China, and thousands of dollars seem to have nothing to do with our lives. But since you clearly understand that you are in the haze, not the fog. After bad air quality can harm the body, it starts to sell well. In addition to the old white appliance manufacturers joining the battleground, emerging enterprises are also very happy. The Xiaomi air purifier is selling well. Nowadays, the hammer is not only a mobile phone, but also plays air purifier.
Consumers are very concerned about this kind of product, but there is a lot of things that do not understand, especially the parameters that measure performance, not as clear as other appliances. The water is also very deep. After all, the performance is not intuitive, nor is it easy to distinguish from the nose. There are several empty words in the hammer conference, one is CADR and the other is CCM. And when Lao Luo introduced the new product, the CADR value reached 800+, and the area reached 56~96 square meters. It was really frightening. What did the parameters represent? The truth-seeking laboratory should make it clear to you.
What is CADR?
Lao Luo has always stressed that the highest CADR value can reach 800+, so what is CADR? According to the explanation of the new national standard of air purifier GB/T 18801-2015, CADR is the clean air quantity, refers to the total amount of clean air output after the filter of the purifier, the unit is m³ /h, including particles CADR and formaldehyde CADR. For example, particulate matter CADR is 500m³/h, which means that 1 hours of air purifiers can purify particulate matter and purify 500 cubic meters of particulate matter. It is mainly used to measure the purification efficiency of air purifier.
The higher the CADR value, the higher the purification efficiency of the air purifier. The CADR value of the particulate matter of the unobstructed air purifier reaches 800+, which means that more air can be purified in the same time, and the purification can be completed in a short time in the fixed space. And there are many kinds of particulates. One word is highly recognized, that is, PM2.5. For household air purifiers, the purification efficiency of PM2.5 is another concept. Simply speaking, the CADR value of particulate matter actually contains the purification efficiency of particulate matter, PM10, PM2.5 and smaller particles.
PM2.5 CADR
In fact, CADR is a value used to measure the efficiency of product purification. It is targeted, for example, formaldehyde CADR is the CADR value measured specifically for the efficiency of formaldehyde purification. The CADR value of toluene is for the purification efficiency of toluene. And the particles in the environment will have different movement rules because of the diameter of their particles, and the content of the particles in the air will be different, and the harm to the human body is different.
PM2.5, it is probably the most frightening category, the fine particles with a diameter of less than 2.5 microns, which can enter the lungs directly through the filter mechanism of the respiratory tract, and accumulate in the lungs to be difficult to expel and eventually lead to cancer. It is an important measure of air quality and an important influence on human health. Whether air purifiers can filter PM 2.5 indoors is a major concern of consumers. But if the CADR value of particulate matter is only labeled, it will not be able to judge the air purifier’s ability of purifying PM2.5.
For air purifier, the particles that remove the PM10 grade only need fiber filter, while the smaller size PM2.5 requires a higher density filter, such as HEPA filter. At the hammer conference, the contrast of the demonstration was larger than that of the larger particles, because the PM2.5 level particles were not visible to the naked eye. So the CADR value of particles reaches 800+, which means that it is not easy to say that purifying PM2.5 is also efficient. It is only necessary to test the CADR value of PM2.5 separately.
CCM value
The CCM value is a parameter to measure the cumulative amount of purification. The length of the purifier can be used by the consumers as a parameter and index that is very concerned by the consumer. The length of its use can be measured by the amount of pollutants that can be adsorbed by the purifier filter, and is characterized by the cumulative amount of purification (CCM), and the unit is milligram, Mg. It is a parameter used to measure the maximum adsorption capacity of empty net filter. The same CCM value is also divided into different types of pollutants, such as PM2.5 CCM value, formaldehyde CCM value, particulate matter CCM value and so on.
National standard regulation
HEPA filter level
PM2.5 CADR value does not pass professional laboratory, it is really difficult to quantify air purifier’s PM2.5 filtering capacity. However, the air purifier filter PM2.5, pollen, allergen, bacteria, virus, second-hand smoke and other particles are achieved through a filter named HEPA filter, and according to the different standard grades, the filtering effect of HEPA filter will be different.
From the Chinese standard and the European standard, it can be seen that the HEPA filter above the high efficiency filter A (national standard) or the H12 (European standard) grade is more than 99.9% of the filtration efficiency of 0.3 microns and above particles, and the product with this level of HEPA filter is guaranteed in the filtering effect. Of course, the high grade HEPA filter can not explain everything, and it is meaningful only when the CADR value of particulate matter is high.
What is the good or bad of an air purifier?
CADR value, CCM value, energy efficiency, noise
The CADR value is the core evaluation parameter of the performance of the air purifier. But when we choose air purifier, we can not refer to its particulate matter CADR and formaldehyde CADR value only. Taking into account the principle that the air purifier is passed through the fan and the filter intercepted particles, the higher the CADR value, the greater the noise and the more electricity will be. Let's take the air breathing cleaner as an example. When CADR reaches over 800, the working voice has reached 66.3dB, when the voice is more noisy. So at the press conference, Lao Luo also emphasized the CADR performance of the new product in a quieter working state.
Therefore, in the actual use, the most upscale position is only suitable for a short time after we back to home, and most of the time will run in the low-grade mode, the noise is low, and the CADR value is more important. We need comprehensive consideration when choosing air purifier. In addition to paying attention to its maximum CADR value, we should also look at the work noise and purification ability of different gears in the product page.
Some of the basic knowledge about the air purifier is here, and then we will also review some of the products on the market, and hope you will pay more attention to our follow-up content.