On this premise, the cost performance is relatively high, and the direct drinking net kettle which can be filtered and ready to drink has replaced the water purifier and become the first choice for many people.
But is the filtering effect of the filter kettle really as magical as advertised by the merchants? An ordinary kettle can turn tap water into direct drinking water with the help of a small filter element?
In order to solve this problem, the editor took the online celebrity product Lycra Direct Drink net kettle as an example and made an unprecedented evaluation. however
This evaluation is a little different, fierce and violent. It mainly includes two parts: the ultimate filtration performance test and the violent disassembly of the filter element.
First, the ultimate filtration performance
The filtration test of tap water is too difficult. Based on inner curiosity, the editor pounded out some rust and dirt from the old iron drums and flower pots at home, and a bottle of Yakult in the refrigerator was the protagonist of this ultimate filtration performance evaluation.
1, rust water filtration test
Let's test the filtering effect of a wave of rust water first. Mix the rust and tap water evenly, then pour into the Lycra filter kettle. After being filtered by two kinds of filter elements, namely, double diversion and microbial barrier, it is obvious that the slightly turbid rust water has been completely filtered out.
However, due to the light problem, the contrast of the whole filter kettle before and after filtering in the photo is not obvious, so the editor multiplies the water samples before and after filtering respectively. Feel it:
After the left filtering and before the right filtering. The contrast is quite remarkable. In addition, the editor also measured the heavy metal content of two water samples by the way. The redder the color of the water sample after adding reagent, the more the heavy metal content, the yellower the water sample and the less the heavy metal content.
The test results are clear at a glance. It seems that the filtering effect of Lycra direct drinking pot on heavy metals is still very powerful.
2. Mud water filtration effect test
After successfully passing the first challenge, the editor mixed the soil with tap water again and poured it into the filter kettle. Muddy water made the editor sweat for the test results.
But the final result seems to say: worried that the filter will be dirty? It doesn't exist.
After being filtered by two filter elements, the muddy water has changed back to a clear and transparent appearance, and the editor even boldly took a sip, but there was no peculiar smell. ...
3. Uniqlo C filtration test
Finally, in order to test whether the microbial barrier filter can really isolate microorganisms such as bacteria, the editor invited Uniqlo C, the sweetest evaluation protagonist, today.
As we all know, Youyiqi belongs to lactic acid bacteria beverage, which contains a large number of active lactic acid bacteria, most of which are between 0.5m- 1m in diameter and most of which are above 1m in diameter.
Therefore, if the Lycra direct drinking pot can completely filter active lactic acid bacteria, it means that the microbial barrier filter can really remove bacteria from water. Before it's too late, let's take a look at the test results.
After the milky Yuni solution is filtered, the water sample becomes transparent. The editor took a sip, and the lactic acid taste of Youyi C itself was completely gone, but the filtered water still had some sweetness.
That's understandable. After all, the diameter of sugar molecules is mostly less than1nm (1m =1000 nm). If the filter can still filter out sugar molecules, it will be too fate.
According to the test results, the bacteria in the filter element blocked by microorganisms are basically removed.
4. Ink filtration test
Finally, there is the most violent and darkest filtering test. High energy is about to begin. Look down!
The editor diluted the thick black ink and poured it into the Lycra filter kettle. After being filtered by the double shunt filter, the color of the ink becomes slightly lighter. At that time, the editor thought that the test seemed to end in failure. Unexpectedly, the microbial barrier filter was pulled back to 10%.
Finally, the filtered water is as clear and bright as ever, and the original flavor of the ink has disappeared.
5. Scale filtration test of cold boiled water
After the violence, let's have a quiet evaluation and cold water filtration test.
As we all know, after the tap water is boiled, there will always be an unspeakable taste, such as the smell of disinfectant?
At the same time, the kettle will not take long, and there will often be layers of thick white unidentified objects on the inner wall, which is the legendary scale. The experience of drinking is really hard to say.
At this point, the editor can't help thinking, what kind of surprise will it be if the boiled and cooled tap water is filtered with Lycra filter kettle?
After filtering, the editor smelled it first. Unexpectedly, the smell of the disinfectant that existed before was completely gone.
It can be seen that the Lycra filter kettle is still very thorough in filtering residual chlorine. Of course, in order to be rigorous, the editor also tested it with residual chlorine reagent: almost transparent, and the value is close to 0.
Secondly, the taste is obviously different. Unfiltered cold boiled water tastes rough, while filtered water tastes much more delicate, even with a little sweetness.
Second, the filter element is violently disassembled.
After feeling the powerful filtering performance of Lycra direct drinking pot, the editor had to have a strong curiosity about these two filter elements.
What monsters are there? If you have the same doubts as the editor, please read on.
Please remember that they are as they are. )
The demolition process was violent, and the editor collected a wave of art knives, scissors and even saws directly from his father's tool room. ...
It took a lot of effort to finally disintegrate the two. Let's take a look at the removed double-effect diversion filter element. What is it like?
1, double-effect guide filter element
The disassembly process of the double-effect diversion filter element is smooth, and it can be cut directly along the top plastic with scissors. After opening the top cover, you will see a dense layer of black and white particles.
Everyone must have guessed the identity of the black particles (coconut shell activated carbon (EU standard)).
Because of its developed pores and strong adsorption capacity, it has a good adsorption effect on many inorganic and organic impurities (such as heavy metals, residual chlorine, pesticides, herbicides, etc.). ) In water, it can also filter out the peculiar smell and different colors in water.
Compared with ordinary activated carbon, coconut shell activated carbon has obvious advantages, such as better adsorption effect, longer service life and no inorganic or organic substances harmful to human body during use.
The white particles in the contents of the double-effect diversion filter element are ion exchange resins. Needless to say, the ability of this product can't be underestimated.
It is usually responsible for removing anions and cations in water, which is the function of softening water that is often heard in life. It can replace metal ions in water and has no harm to human body.
At the same time, the size of ion exchange resin particles will also affect its working performance, so in theory, the replacement effect of anion and cation can be artificially controlled by using ion exchange resin with a specific size.
It is worth mentioning that ion exchange resin also has different affinity for different ions, that is, adsorption selectivity.
The approximate adsorption order of cations is Fe3+Al3+Pb2+Ca2+Mg2+K+Na+H+.
Therefore, this is also the reason why Lycra direct drinking pot can filter out heavy metal cations such as iron, aluminum and bowls, but retain some beneficial cations (such as calcium and magnesium ions) which are beneficial to human absorption.
In fact, Lycra's dual-diversion high-efficiency filter element is really not small, not only imported from Italy, but also patented by many countries. Five layers of fine filtration can eliminate all harmful factors in water.
2. Microbes block the filter element
The disassembly process of the filter element blocked by microorganisms is quite difficult, and the art cutter can do nothing about it. The editor can only ask the great god of disassembly to saw it. ...
After sawing horizontally from the top of the filter element, it was found that the filter element blocked by microorganisms was covered with silk, which looked a bit like a handmade surface.
In fact, hollow fiber, whose real identity is hollow fiber, is actually a good hand at separating microorganisms.
The position of hollow fiber ultrafiltration membrane in ultrafiltration technology can be said to be the king level. There are countless tiny micropores on each fiber tube, which are used to intercept microorganisms with smaller diameters or other harmful molecules in water, and the molecular weight can reach thousands to hundreds of thousands.
This can naturally filter out most bacteria. Moreover, the filtered water can be drunk without boiling, that is, it can be drunk immediately after filtering, which is very convenient.
In fact, Lycra, a microbial barrier filter, is imported from Italy, just like the double-diversion high-efficiency filter. It adopts the filtration technology of GermStop, which can be used as the last and most stringent checkpoint in the filter kettle to isolate all harmful substances in the water (99.999%).
At the same time, this data has also been certified by the Italian International Chemical Analysis Center and passed 35 wide and micro tests.
Third, summary.
In a word, the filtration performance of Lycra direct drinking pot is really impeccable, and the filtration principle is also very reliable. At the same time, because of its small size and high portability, it is very suitable for home or office use.
Compared with RO membrane water purifier which can remove good and bad ions at the same time, it can still retain beneficial mineral ions such as calcium and magnesium, and will not produce waste water. Simply injecting tap water can get a more secure drinking experience.
Worth it!