How do I know that the water in the water tank of the water purifier is used up when I use it for the first time?

If there is an electronic prompt, you will be prompted \x0d\ Most of the questions you ask are not prompted electronically. Turn off tap water in tank mode and open the water outlet of the water purifier. If there is no water, it's over. \x0d\\x0d\ can refer to the following important indicators to purchase: there are many categories and a wide range, please read patiently. After all, a water purifier is related to the health of your family. \x0d\ Look at the filter element first: it is the core of any water purifier, and the quality of the filter element directly affects the purification index of the water purifier, which is undeniable. \x0d\ First of all, let's 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 completely different effects). Generally speaking, no matter how nice the names are, they can be divided into two categories. \x0d\ filtration membrane: The market is also full of various brand-name filtration membranes, pp cotton and so on. In fact, there is only one function, filtering 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; \x0d\ The obvious disadvantage is that it is too clean (it is not recommended for adults to drink for a long time, and it does not contain any minerals beneficial to the human body, and it is forbidden for infants and the elderly; And can't filter bacteria, viruses and other microorganisms) The filtration speed is slow \x0d\ By the way: the application scope of reverse osmosis-the preparation of space water, purified water and distilled water; Water for alcohol production and alcohol reduction; Preparation of water for pharmaceutical, electronic and other industries; Concentration, separation, purification and water production of chemical processes; Boiler make-up water softened water; Desalination of seawater and brackish water; Water and wastewater treatment in papermaking, electroplating, printing and dyeing, food and other industries; Advanced treatment of urban sewage. \x0d\ Secondly-pay attention to whether the filter element can filter the odor and improve the taste (any water purifier with activated carbon can do it, but the structure of the filter element is different, resulting in a huge difference in effect, life and price) \x0d\ granular activated carbon filter element: it can remove the odor in a short time, but it will be washed out of the waterway by water for a long time and lose the filtering effect; The disadvantage is that the service life is uncertain (users will only know if the filter element has lost its purification ability) \x0d\ High-density activated carbon: long service time; Block structure, will not form a waterway; The disadvantage is that it is complicated to make and expensive (it is 100 times higher than granular activated carbon with the same weight). Because of patent protection (leading to high production cost) \x0d\ In recent years, there has also appeared a diatom mud filter: Popular Science: The main raw material of diatom mud (English: diatom mud) is diatom mineral-diatomite, which was formed hundreds of millions of years ago. Diatoms are natural substances deposited by algae living in oceans and lakes. Its main component is opal, which is rich in many beneficial minerals and has a light and soft texture. Electron microscope shows that there are countless micropores on the surface of its particles, the porosity is over 90%, and the specific surface area is as high as 65 _/g. Diatom mud products have a unique "molecular sieve" structure, which has a strong role in purifying air and eliminating odor. Therefore, it can be regarded as having dual functions of filtering impurities and odors at the same time, but it can't filter bacteria (most bacteria and fungi are less than 0.2 microns in size and can't be directly filtered, and algae itself will also carry bacteria. ) \x0d\ Another ceramic filter element: The manufacturer claims that it can be filtered, antibacterial and activated. At present, the ceramic filter element with the highest filtration accuracy in the world is a double-control membrane ceramic filter element, with an average pore size of 0. 1μm (μ m) \x0d\ But -\x0d\ At present, the smallest known bacteria are nano-bacteria, whose cell diameter is only 50nm=0.05 μ m, even smaller than the largest virus. \ x0d \ Most viruses have a diameter of 65438. \x0d\ can achieve antibacterial effect. \x0d\ Finally-pay attention to whether the water purifier can kill microorganisms. Viruses and bacteria in microorganisms are potential pathogens and must be removed (ordinary products cannot kill microorganisms; Some products can kill microorganisms, but technology determines the risk of purification.) \x0d\ Physical antibacterial: it means physically blocking the passage of bacteria and viruses, and it is not difficult for everyone to choose the diameter of viruses and bacteria. \x0d\ Chemical antibacterial: use chemical filter element 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\ Qualified water purifiers can only be listed in China by filtering impurities, retaining minerals beneficial to human body and improving the taste of drinking water (reaching China standards) \x0d\ High-quality water purifiers must filter impurities, retain minerals beneficial to human body and filter various chemical pollutants. Improve the taste of drinking water and kill bacteria and viruses at the same time (it meets international standards and can be tested and sold in any country and region in the world) \x0d\ In China, the traditional production technology of tap water has a history of 100 years. At present, most water plants still stay on the basis of "flocculation-sedimentation-filtration-chlorine disinfection". The national standard for drinking water in China is based on the national standard GB 5749—2006 of People's Republic of China (PRC). This standard has been used for 10 years, while developed countries generally revise the standard every 3-5 years. \x0d\ You may think it is a bit long, but I am forced to explain all kinds of products on the market! But everyone should be happy. Congratulations, you have read the longest part of this article. \x0d\ Second, look at the installation: Whether the water purifier is convenient to install directly affects your future use (is it convenient to move? Can I install it myself? The simpler the installation, the more convenient the maintenance) \x0d\ First avoid-changing pipes. The so-called off-stage machine will feel very inconvenient when the filter element needs to be replaced. \x0d\ (For example, reverse osmosis needs to install a booster valve, so the pipeline must be replaced, so it needs professionals to install it at home, which is very troublesome, and there are potential safety hazards when people go in and out) \x0d\ (For example, low-end machines also need to replace pipelines to install additional purified water outlet pipelines, and professionals also need to install them at home) \x0d\ Of course, it is not absolute. Now businesses are trying to avoid changing pipelines and need to make detailed purchases. \x0d\ is of course the best-there is no need to change pipes. Wall-mounted or desktop water purification equipment generally belongs to this category, and it is very convenient to install and replace. \x0d\ (For example, the water purifier of Yizhiyuan adopts a diverter valve, so purified water and tap water can be used separately only by connecting the diverter valve to the faucet, which is very convenient to install and users can easily assemble and debug by themselves) \x0d\ III. Consumption: First, the water purifier adopting reverse osmosis technology will produce wastewater in the process of purifying water. \x0d\ Heavy metal elements in wastewater often exceed the standard by several times, so washing clothes with discharged wastewater will harden 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\ Waste water ratio is also a key indicator that directly affects the consumption of water purifier. The ratio of waste water produced by low-end water purifiers is as high as 1:6 (purifying 1 ton of drinking water requires 6 tons of water; 1 ton tap water 3 yuan, then you need to spend 2 1 yuan to drink 1 ton direct drinking water) \x0d\ Some mature enterprises can reduce the waste water consumption to 1:3 (that is, drinking 1 ton direct drinking water needs 12 yuan). The higher the proportion of waste water) \x0d\ For the water purifier that does not use extreme technologies such as reverse osmosis, no waste water will be generated in the process of purifying water, and the purification cost can be saved appropriately. \x0d\ followed by the filter element-any water purification equipment will filter impurities and other harmful substances to pollute the filter element during purification, so it is necessary to replace the filter element regularly. \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, but many people don't replace it on time because they don't know when to replace it. ) \x0d\ The high-end water purifier uses the filter cartridge (the filter cartridges are combined together) and the cost of replacing it once a year is about 1500. \x0d\ IV. Convenience: Whether the water purifier is convenient in use is also an important indicator to determine the quality of a water purifier. \x0d\ Is it 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 easy. Then how do they explain: "What about the impurities that are filtered out?" \x0d\ So they actually made it up and said: 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\ The so-called magnetized water means that ordinary water passes through a magnetic field with a certain intensity at a certain speed along the direction perpendicular to the magnetic field lines, so that ordinary water becomes magnetized water. \x0d\ They boast that it can be purified and improved? \x0d\ However, the magnetized water completely loses its magnetism only after leaving the magnetizing equipment for 30 seconds, and the effect can be imagined. \x0d\ The most reasonable statement is backwashing: 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 once every 7 days and can be used for 20 years (once every 7 days, 4 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! ! Of course, this is a joke. Their so-called cleaning: in fact, it is to wash the equipment with water and clean up the filtered impurities. Three minutes or five minutes at a time? I don't remember exactly. This is an unknown cost, but there are also huge risks. \x0d\ Why? \x0d\ Have you ever waited for a red light? 99 seconds is 1 minute 30 seconds, and people will be impatient and unable to stay. Maybe you will do something else. What will happen if you forget to turn off the tap? Light waste, heavy flooding. Do you think so? \x0d\ As far as filter element replacement is concerned, the filter element replacement of water purification equipment in the market is often very complicated (if it is a set of 5-level purification equipment, the filter element should be replaced once every 3 or 6 months, with 5 filters at a time; 3 filter *4 quarters +2 filter *2 half a year = 14 times; Once a month on average), but for ordinary families, it needs professional door-to-door installation (14 door-to-door service, which may cause 14 service fee and 14 entrance risk) \x0d\ giving people the illusion that the filter is clean by discharging waste water is also a common sales tool for merchants. 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 granular filter is 6 months, 1 year is only a few tons of water, so it must be replaced). In fact, such constant backwashing of the filter will also consume the life of the filter. \x0d\ So some high-end water purifier manufacturers use filter elements, so they can easily replace the whole filter element, which is convenient and time-saving. \x0d\ Personally, I suggest that it is best to buy a product with a replacement filter. However, at present, there are on-time door-to-door services, and high-quality businesses are hard to find. Many businesses do not provide on-site services for free. You can choose a water purifier to replace the filter element, and you can buy it yourself when replacing it. Just take the filter out and replace it with a new one. Personally, I think this filter is the safest, and I can change it myself, so I don't need to find someone else to come to my house. Finally, there is a prompt function-when to change 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\ Another point is convenience-different technologies will also 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. Maybe after a long time, customers can't find the instruction manual and forget which button to restart? ! This will not happen to high-end products, and incoming calls can be used normally without restarting. Is it more convenient) \x0d\ V. Look at word of mouth: Through the above understanding, you should have a very clear understanding of 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\ Sixth look at 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\ Seventh, 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, the performance advantages and disadvantages of various devices, instead of blindly advocating his own products. \x0d\ By the way, this is also a method used by many water purifier salesmen to mislead consumers (drinking alkaline water is healthier! ! ) \x0d\ Actually, drinking alkaline water is the same as drinking acidic water. \x0d\ Because normal human body fluids are weakly alkaline, the pH value is around 7.4. In daily life, human body fluids have a strong neutralizing and buffering function, and people can maintain the balance of pH, so no matter whether the food you eat is acidic or alkaline, the pH of the human body remains basically unchanged, and there is no so-called "acidic constitution" caused by using acidic foods. Therefore, when water is drunk into the stomach, the environment of the stomach itself is acidic, and the pH value is 2-3. Gastric juice is a very acidic buffer solution. No matter what water you drink, the pH value will become acidic when you drink it in your stomach. \x0d\ Therefore, the so-called "drinking only alkaline water is good, but drinking weakly acidic water is harmful" by many salespeople has no scientific basis, and it is misleading propaganda for the time being. \x0d\ Eighth, read the instruction manual or user manual: Why do you have to read these two things? \x0d\ Because there are so many benefits, it can directly reflect a lot of information. \x0d\ For example, whether the filter element of the water purifier needs to be replaced \x0d\ The effect of the water purifier-some high-end water purifiers will indicate in the user manual which harmful substances can be purified, as well as the experimental parameters and results. You can be more clear that these words printed in the instruction manual and user manual have legal effect. If they don't achieve the effect, they will become the handle of peer attacks. \x0d\ Ninth, look at after-sales: A good brand has a perfect after-sales system (however, this often requires real purchase of the product, and it is only when you use it that you realize whether it makes you satisfied or not) \x0d\ If you have read this, don't discuss the following sentence: \x0d\ Why do the water purifiers produced by the same water purifier manufacturer have the same brand, different models and different prices? \x0d\ I used to feel normal! \x0d\ but it was only after collecting and sorting out these materials that I suddenly realized! ! \x0d\ What should I do 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 class 5 or class 8) of water purifiers? \x0d\ and much more expensive! \x0d\ On the other hand-if the high-priced water purifier it produces can really meet the water purification standard? \x0d\ Then selling low-priced models of water purifiers will be deceiving customers! ! \x0d\ This question has been haunting me \x0d\ so personally, I think the price is not important, the brand is not important, the only thing that matters is the effect! \x0d\ Imagine: Even if you only spend 200 yuan to buy a water purifier, the water purifier you bought in 200 yuan will not achieve the expected effect! That would be a waste of 200 yuan. Do you think so?