What black particles are there when cleaning the filter barrel of the water purifier?

It should be that the granular activated carbon was washed away by water (this happens when the filter cotton at the bottom of the granular activated carbon filter element is damaged) \x0d\ As a salesman who has been selling water purifiers for nearly five years, I have to say that the water purifier industry is in chaos; \x0d\ If you want to buy a water purifier that suits you, please read and think about this short article carefully: \ x0d \ x0d \ You may never think: Is there a problem with the same brand, different models and different prices of water purifiers? \x0d\ Have you ever thought: If the low-priced model (so-called Grade 3) water purifier produced by a factory can meet the water purification requirements? \x0d\ If possible? \x0d\ So is it necessary to produce high-priced models (so-called Grade 5 or Grade 8) for water purifiers? \x0d\ and much more expensive? \x0d\ But: What if the high-priced water purifier can really meet the water purification standard? \x0d\ So selling low-priced models of water purifiers has become deceiving customers? \x0d\ Can an enterprise that sells products in order to adapt to various consumers in the market regardless of whether the quality is up to standard be trusted? It may be said that in fact, the low-end products of our products are up to standard, and the high-end products are just more perfect in function (nonsense, in fact, he is telling you that it doesn't matter whether it is used or not, tap water only enters the home after reaching the standard) \x0d\\x0d\ So the price and brand of the water purifier are not important. The only thing that matters is the effect! \x0d\\x0d\ How to choose an economical and efficient water purifier? Purchase can refer to the following important indicators: \ x0d \ x0d \ 1. Look at the filter element: the core component of the water purifier directly affects the purification index of the water purifier. \x0d\ First of all-pay attention to whether the filter element can filter impurities and make the water look clearer (it can be said that any water purifier can do it, but different filtering methods have different effects) \x0d\ filtration membrane: The market is also full of various brand-name filtration membranes, pp cotton and so on. ; In fact, the function is only to filter impurities above a certain specification. \x0d\ reverse osmosis: the most common in the market, with a filtration rate of 99% as its biggest selling point; The disadvantage is also obvious that it is too clean (there are no minerals beneficial to the human body; And it can't filter bacteria, viruses and other microorganisms.) The filtering speed is slow. \x0d\ Secondly, we should pay attention to whether the filter element can filter the odor and improve the taste (any water purifier with activated carbon can, but the filter element has different structural effects, different service life and different prices). \x0d\ Granular activated carbon filter element: It can remove the odor in a short time, but it will be washed out of the channel by water for a long time and lose the filtering effect. Disadvantages: the service life is uncertain (users will only know when the filter element loses its purification ability) \x0d\ High-density activated carbon: long service time; Block structure, will not form a waterway; Disadvantages: it is complicated to make and expensive (it is 100 times higher than granular activated carbon with the same weight). Because of patent protection (high production cost) \x0d\ Finally, we are concerned about whether the water purifier can kill microorganisms, and viruses and bacteria in microorganisms are potential pathogens that must be removed (ordinary products cannot kill microorganisms; Some products can kill microorganisms, but the technology determines the risk of purification) \x0d\ Chemical sterilization: use chemical filters to kill microorganisms; Disadvantages: chemical residue, affecting taste and health (treatment: after installing chemical filter, improve the taste of ion filter or activated carbon filter; So that consumers can't directly detect the abnormality from the taste, and it is more difficult to identify chemical residues) \x0d\ ultraviolet sterilization; The sterilization rate is as high as 99%; Disadvantages: need to be charged (potential leakage safety hazard; Of course, the potential risks can be avoided through the wireless transmission technology of electric energy. However, this technology is protected by patent (high production cost) \x0d\ x0d \ A qualified water purifier can filter impurities, retain minerals beneficial to human body and improve the taste of drinking water. \ x0d \ A high-quality water purifier must filter impurities, retain minerals beneficial to human body, filter various chemical pollutants, improve the taste of drinking water and kill bacteria at the same time. Can I install it myself? The simpler the installation, the more convenient the maintenance) \x0d\ Avoidance-Most pipes are replaced under the stage, so it is inconvenient to replace the filter element. \x0d\ (For example, reverse osmosis needs to install a booster valve, and the pipeline must be replaced, so it needs professionals to install it at home, which is very troublesome and has potential safety hazards for personnel to enter and leave) \x0d\ (For example, low-end machines also need to replace the pipeline to install additional purified water outlet pipelines, and professionals also need to install it at home) \ x0d \ Best- It is necessary to install and replace the pipeline, wall-mounted or table-top water purification equipment. \x0d\ (For example, the water purifier of Yizhiyuan uses a diverter valve, which can separate pure water from tap water only by connecting the diverter valve to the faucet, which is convenient to install) \ x0d \ x0d \ 3. It depends on the dosage: wastewater-the water purifier using reverse osmosis technology will produce wastewater in the process of water purification, and the heavy metal elements in wastewater often exceed the standard by several times or ten times, so use the discharged wastewater to wash clothes. Used to mop the floor, the floor tiles are damaged; Even flushing the toilet is not allowed, which will corrode ceramics; Washing vegetables is even more impossible; Therefore, the production of waste water greatly increases the use cost. \x0d\ The proportion of wastewater directly affects the consumption of the water purifier, and the proportion of wastewater generated by the low-end water purifier is as high as 1:6 (purification 1 ton of drinking water requires 6 tons of water; 3 yuan 1 ton tap water, so it will cost you 1 ton direct drinking water) \x0d\ Some mature enterprises can reduce the waste water consumption to 1:3 (that is, it will cost you 9 yuan to drink 1 ton direct drinking water) \ x0. \x0d\ Water purifier with several stages of filtration technology commonly used in the market: generally, the impurity filter, pp cotton and activated carbon filter are replaced once every three months; Replace the reverse osmosis filter element in 6 months; Price150-800 yuan. If the filter element is replaced on time within one year, it will cost about 100 yuan *3 filter elements *4 times +800 yuan *2 times = 2,800 yuan; In fact, the cost of the filter is far more than that. Many people just want to replace it on time. ) \x0d\ The high-end water purifier uses a filter cartridge (the filter cartridges are combined together), and it takes about 1500 to replace it once a year. \x0d\\x0d\4。 Easy to see: Whether the water purifier is convenient in use is also an important indicator to determine the quality of a water purifier. \x0d\ Replacement —— Whether it is convenient to replace the filter element. \x0d\ Some inferior or low-end water purifiers boast that they don't need to replace the filter element in order to make people feel convenient and save trouble; There is a problem. Where are the filtered impurities? \x0d\ So they made up one saying: Magnetization? \x0d\ magnetization: refers to the process of obtaining magnetism from substances that are not originally magnetic. \x0d\ instead of what some salespeople say: consciousness is melted by magnetic force! \x0d\ Let ordinary water pass through a magnetic field with a certain intensity at a certain speed along the direction perpendicular to the magnetic field lines, and ordinary water will become magnetized water. They boast that they can purify this. Where is the improvement? Magnetized water can completely lose its magnetism only after leaving the magnetizing equipment for 30 seconds, and the effect can be imagined. \x0d\ Cleaning: Not long ago, I heard some salespeople say that the filter element of a brand water purifier does not need to be replaced, but it can be cleaned once every seven days and can be used for 20 years (once every seven days, four times a month, 48 times a year! It needs to be cleaned 960 times in 20 years) \x0d\ It is also a miracle to persist (so, how much can it cost to clean each time) (if you forget to clean the clean water you drink? ) I admire them for playing so well! ! \x0d\ It is often complicated to replace the filter element of water purification equipment on the market (if it is a set of 5-level purification equipment, replace the filter element every 3 months and 6 months, with 5 filter elements at a time; 3 filter *4 quarters +2 filter *2 half a year = 14 times; Once a month on average) and for the average family, it needs professional on-site installation (14 on-site service, which may result in 14 service charge! ) \x0d\ The high-end water purifier uses a filter element, so you can easily replace the whole filter element yourself, which is convenient and time-saving. \x0d\ backwashing: There is another ridiculous design (backwashing) on the market. It is said that the filter element will not be changed for 20 years. I bought that man just to see what backwashing is. \x0d\ Water enters from the inlet, and the impurities with larger particles are filtered through the coarse screen before reaching the fine screen. In the process of filtration, the fine screen gradually accumulates dirt and impurities in the water, forming a filter impurity layer, because the impurity layer is accumulated on the outside of the fine screen. \x0d\ backwash it1-that is, tap water is connected to a fine screen to filter water out (how terrible! For the adsorbed impurities and bacteria, it is said that these harmful substances can be washed off by washing with water alone, but internal reaction will make a large number of impurities adhere to the inner wall of the filter element of the water purifier, so that when the water is filtered in, these harmful substances will be mixed into the purified water to cause secondary pollution, which will not play a role in purifying water at all. ) \x0d\ backwashing 2- Because the impurity layer is accumulated outside the fine screen, a pressure difference is formed inside and outside the fine screen. When the pressure difference of the filter reaches the preset value, the automatic cleaning process will begin, during which the supply of clean water is cut off and the cleaning valve is opened. Tap water does not pass through the fine filter screen of the filter element, but enters the sewage pipe to form a drainage flow, and the filter screen is washed with stored filtered water and tap water through the pressure difference inside and outside the filter screen. The pollution of the inner wall of the filter element is skillfully avoided. There are automatic and manual) \x0d\ gives people the illusion that the filter element is clean by discharging waste water. Why is it illusion? First of all, this method can only be used on the filter screen, but it will increase the consumption of activated carbon filter (activated carbon filter: the maximum service life of particle filter is 6 months, and it must be replaced 1 year). In fact, such constant backwashing of the filter will also consume the life of the filter. \x0d\ What's more, many bacteria and germs can resist high temperature and fungicides, not to mention washing with water. \x0d\ So I suggest that you'd better buy products that replace filter elements, but it is difficult to find such door-to-door service providers now, and many of them are not free. You can choose to replace the water purifier with a filter element, so you can easily replace it. Just take out the filter cartridge and replace it. This is the safest and healthier way, and you can change it yourself without looking for someone else. \x0d\\x0d\ Tip-When to replace the filter element is also one of the advantages of high-end products. \x0d\ Low-end products will not prompt the service life of the filter element, and it is entirely up to the user to estimate or replace it according to the instructions (in this way, even if the filter element fails, fails to meet the purification requirements or even becomes waste water, the user will not know to drink it as usual; How terrible! Heavy metals and pollutants accumulated in a few months have been inadvertently drunk by you) \x0d\ High-end products provide template indicator lights to remind users whether the filter element needs to be replaced. \x0d\ Convenient-Different technologies will bring different experiences when used (for example, some products need to be turned on, turned off after power failure, and must be restarted when making a phone call, but after a long time, the customer can't find the book, and forgot which button to restart? You said trouble! ! This will not happen to high-end products, and incoming calls can be used normally without restarting. Is it convenient) \ x0d \ x0d \ 5. Look at word of mouth: Through the above understanding, you should be very clear about the purchase of water purifiers. Therefore, any water purifier that says that there is no need to replace the filter element is fooling you. If you don't believe me, let him read the instruction manual, which will definitely indicate the replacement time of the filter element. For an untrustworthy company, the product quality will not be so good! ! \x0d\ x0d \ 6。 Look at the technology: the technology here refers to world-class patents (not everyone in the market can use them, but everyone is using them) \ x0d \ Protection period of patented technology: 20 years from the date of application for invention patents, and 10 years for utility model patents and designs. During the period, others have no right to use it. If the protection expires, they can apply to the patent applicant or unit for authorization and pay the fee (it will be the technology used by everyone in about 30 years, and it will be free at this time). So the technology that everyone is using in the market can be regarded as outdated technology. ! \x0d\\x0d\7。 Look at the sales volume: a good salesman will give you a detailed introduction of the water purifier he sells, as well as the comparison with other similar products and the performance of various equipment, instead of blindly advocating his own products. \x0d\\x0d\8。 Look at after-sales: A good brand has a perfect after-sales system (but this often requires you to actually buy the product before you can realize whether it satisfies you) \x0d\ Not much to say here. If you need a water purifier, you can contact me by clicking the blue word at the bottom of the answer.