If you want to buy a water purifier that suits you, please read and think carefully about this short article:
You may never have thought about it: Is there a problem for water purifier manufacturers to produce water purifiers with the same brand, different models and different price points?
have you ever thought about it: if the low-priced model (so-called class 3) produced by a factory can meet the water purification requirements?
if possible?
so is it necessary to produce high-priced models (so-called class 5 or class 8) of water purifiers?
and much more expensive?
but: if the high-priced water purifier can really meet the water purification standard?
So selling low-priced models of water purifiers becomes cheat people and fooling customers?
is it trustworthy to sell enterprises regardless of whether the quality meets the standard in order to adapt to various consumers in the market? It may say that in fact, the low-end products of our products have reached the 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 you use them or not, and tap water can only be used at home after reaching the standard)
Therefore, the price is not important when choosing a water purifier, the brand is not important, and the only important thing is the effect!
how to choose an economical and efficient water purifier? You can refer to the following important indicators for purchase:
1. Look at the filter element: the core main part of the water purifier, which directly affects the purification indicators of the water purifier.
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 filtration methods have different effects)
filtration membrane: the market is also full of various famous filtration membranes, pp cotton and so on; In fact, the function is only to filter impurities above a certain specification.
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 can't filter bacteria, viruses and other microorganisms). The filtration speed is slow.
Secondly, pay attention to whether the filter element can filter odor and improve the taste (any water purifier with activated carbon can do it, but the filter element structure has different effects, life span and price difference).
Granular activated carbon filter element: it can remove odor in a short time, but it will be washed out of the channel by water for a long time and lose its filtration effect; Disadvantages: the service life is uncertain (users will not know until they find that the filter element has lost its purification ability)
High-density activated carbon: long service time; Block structure, will not form a waterway; Disadvantages: the production is complicated and expensive (1 times higher than that of granular activated carbon with equal weight). Because of patent protection (high production cost)
Finally, whether the water purifier can kill microorganisms, viruses and bacteria in microorganisms are potential pathogens that must be removed (ordinary products can't kill microorganisms; Some products can kill microorganisms, but technology determines the risk of purification)
Chemical sterilization: use chemical filter to kill microorganisms; Disadvantages: chemical residue, which affects the taste and health (treatment method: install the chemical filter after, improve the taste of ion filter or activated carbon filter; So that consumers can't directly detect the abnormality from the taste and improve the difficulty of identifying chemical residues)
Ultraviolet sterilization; The sterilization rate is as high as 99%; Disadvantages: need to be electrified (potential leakage safety hazard; Of course, the potential risks can be avoided through the wireless transmission technology of electric energy.) But this technology is protected by patent (high production cost)
It is enough for a qualified water purifier to filter impurities, retain minerals beneficial to human body and improve the taste of drinking water.
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 and viruses.
2. Can you install it yourself? The simpler the installation, the more convenient the maintenance)
Avoidance-most of the pipeline changes are under the platform, which will be very inconvenient when the filter element needs to be replaced.
(For example, reverse osmosis needs to install a booster valve, so the pipeline must be changed, so it requires professionals to install it at home, which is very troublesome and there are potential safety hazards for people to enter and leave)
(For example, low-end machines also need to change the pipeline to install additional purified water outlet pipelines, and professionals also need to install them at home)
It is best-there is no need to change the pipeline, wall-mounted or table-top water purification equipment, and the installation and replacement are very convenient.
(For example, the water purifier of Yizhiyuan uses a diverter valve, and it is only necessary to connect the diverter valve to the faucet, so that the purified water and tap water can be used separately, which is convenient to install)
3. Look at the consumption: wastewater-the water purifier of reverse osmosis technology produces wastewater in the process of purifying water, and the heavy metal elements in the wastewater often exceed the standard by several times and ten times, so washing clothes with the discharged wastewater will harden; Used to mop the floor, floor tiles are damaged; Even flushing the toilet is not allowed, which will corrode ceramics; It is even more impossible to wash vegetables; Therefore, the production of wastewater greatly increases the use cost.
the proportion of wastewater directly affects the consumption of water purifiers, and the proportion of wastewater produced by low-end water purifiers is as high as 1:6 (it takes 6 tons of water to purify 1 ton of drinkable water; 1 ton of tap water is 3 yuan, so it will cost you 18 yuan to drink 1 ton of direct drinking water)
Some mature enterprises can reduce the waste water consumption to 1:3 (that is, drinking 1 ton of direct drinking water will cost 9 yuan)
For water purifiers that do not use extreme technologies such as reverse osmosis, there will be no waste water in the process of water purification, which greatly saves the purification cost.
filter element-water purification equipment will filter impurities and other harmful substances to pollute the filter element during purification, so it needs to be replaced regularly.
water purifiers with several stages of filtration technology commonly used in the market: generally, the impurity filter element, pp cotton and activated carbon filter element are replaced every three months; Replace the reverse osmosis filter element in 6 months; The price ranges from 15 to 8 yuan. If the filter element is replaced on time in one year, the labor cost of door-to-door service personnel is not counted, which will cost 1 yuan *3 filter elements *4 times +8 yuan *2 times = 2,8 yuan; In fact, the cost of the filter element is far more than this, but many people just want to replace it on time.)
High-end water purifiers all use filter element boxes (the filter elements are combined together), and it costs about 15 yuan to replace them once a year.
4. Easy to see: Whether it is convenient in the process of using the water purifier is also an important indicator to determine the quality of a water purifier.
replacement-is it convenient to replace the filter element?
some inferior or low-end water purifiers boast that their water purifiers 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?
so they made it up: magnetized?
magnetization: refers to the process of obtaining magnetism from a substance that was not magnetic.
not what some salespeople say: consciousness melted by magnetic force!
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 and improve where? However, the magnetized water completely loses its magnetism only after leaving the magnetizing equipment for 3 seconds, and the effect can be imagined. < P > Cleaning: Not long ago, I heard some salespeople say that the filter element of a certain brand of water purifier does not need to be replaced, but it can be cleaned every 7 days for 2 years (once every 7 days, 4 times a month, 48 times a year! It needs to be cleaned 96 times in 2 years)
It is also a miracle to persist (then, how much can it cost to clean each time) (if you forget to clean the clean water you drink?) I really admire them for being so good at blowing! !
It is often very complicated to replace the filter element of water purification equipment in the market (if it is a set of 5-level purification equipment, replace the filter element every 3 months and 6 months, with 5 filters each time; 3 filter elements *4 quarters +2 filter elements *2 half years =14 times; Once a month on average) and for the average family, it needs professional on-site installation (14 on-site services may result in 14 service charges! )
The high-end water purifier uses the filter cartridge, so you can easily replace the whole filter by yourself, which is convenient and time-saving.
backwashing: there is also a ridiculous design (backwashing) on the market. It is said that the filter element will not be replaced for 2 years. I bought that man to see what backwashing is.
water enters from the inlet, first filters out impurities with larger particles through the coarse screen, and then reaches the fine screen. In the process of filtration, the fine filter 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 filter screen.
backwashing (1) is to connect tap water into a fine screen to filter water from the inside out (how terrible it is! For the impurities and bacteria that have been adsorbed, it is said that these harmful substances can be washed out by washing them with water alone, but the internal reaction will adhere a large number of impurities 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.)
Backwashing 2-Because the impurity layer accumulates on the outer side of the fine screen, a pressure difference is formed on the inner and outer sides of the fine screen. When the pressure difference of the filter reaches the preset value, the automatic cleaning process will begin, during which the clean water supply is cut off, and the cleaning valve is opened. Tap water does not pass through the fine filter screen of the filter core, 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 two kinds: automatic and manual.)
By discharging waste water, it gives people the illusion that the filter element is clean. Why is it an illusion? First of all, this method can only be used in filter screens, but it will increase the consumption of activated carbon filter (activated carbon filter: the maximum service life of granular filter is 6 months, and the block is 1 year, so it must be replaced). In fact, this continuous backwashing of filter screens will also cost the filter life.
What's more, many bacteria and germs can resist high temperature and fungicides, not to mention being washed with water.
so I suggest that you should buy products that replace the filter, but it is hard to find such door-to-door services now, and many of them are not free. You can choose to replace the water purifier with the filter cartridge, so that you can replace it easily. Just take the filter cartridge out directly and replace it. This is the safest and healthier, and you can change it yourself without looking for someone else.
tip-when to replace the filter element is also one of the advantages of high-end products.
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, it can't 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 for several months have been inadvertently drunk by you)
High-end products provide template indicator lights to remind users whether it is necessary to replace the filter element.
convenience-different technologies will bring different experience when using (for example, some products need to be powered on, shut down in case of power failure, and must be restarted when calling, but after a long time, customers can't find the book and forget 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 very convenient?
5. Look at the reputation: Through the above understanding, you should know the purchase of water purifier very clearly. Therefore, any water purifier that says there is no need to replace the filter element is fooling you. If you don't believe me, ask him to take a look at the manual, which will definitely indicate the replacement time of the filter element. For an untrustworthy company, the product quality will not be so good! !
6. Look at the technology: the technology here means that it is a world-class patent (not a technology that everyone can use in the market, but everyone is using it)
The term of protection of the patented technology: 2 years for invention patents and 1 years for utility model patents and designs from the date of filing. During the period, others have no right to use it. If the protection period expires, they can apply to the patent applicant or unit for authorization and pay for it (it will be the technology used by everyone in about 3 years, and it will be free at this time). Therefore, the technology that everyone is using in the market can be regarded as obsolete technology. !
7. Look at sales: 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 advantages and disadvantages of various devices, instead of blindly advocating his own products.
8. Look at after-sales: A good brand has a perfect after-sales system (however, this often requires a real purchase of the product, and you can only realize whether it makes you satisfied when using it). I won't say much here. In fact, as a water purifier that needs strict standards, it really needs to be carefully understood and selected.