What brand of water purifier is good? Where's the good news?

Hehe, don't listen to the salesman's nonsense If it is a water purifier, adding KDF is already a very good product!

I have some information about choosing a water purifier here.

Have a look. It should help you.

Pay attention to the choice is to choose which filter element to use, different water quality characteristics are suitable for different filter elements.

If you have any questions, please contact me with qq:376428762!

Summary of water purifier knowledge

Ordinary water purifier

1, PP filter water purifier: Single-cylinder water purifiers with various PP filter elements are generally low in price, but the filter elements are easily blocked and need to be replaced frequently, so the filtration accuracy is not high, and they are only used for preliminary filtration of water.

2. Activated carbon filter screen: it can eliminate different colors and odors in water, but it can't remove bacteria and other harmful substances in water, and the removal effect of sediment and rust is also very poor.

3. reverse osmosis pure water machine: Thoroughly remove the beneficial and harmful substances in the water to make pure water. Pressurized power supply is needed, and the utilization rate of water is low (there is more waste water and less pure water, which generally wastes about 50% of tap water). The purification cost is high and the flow rate is small, which only solves the problem of drinking water.

4. Water softener: Generally, regenerated sodium resin is used to replace calcium and magnesium ions in water, which only softens and reduces the hardness of water and cannot purify and remove various harmful pollutants in water.

5. Barrel water purifier: Barrel water purifiers installed on drinking fountains generally use filtration materials such as activated carbon, ceramics, mineralized balls, etc., which have low filtration accuracy and are completely intercepted. It is inconvenient to clean, easy to form secondary pollution and less water. It only solves the problem of drinking water. In fact, people who know filtration technology are afraid to drink.

6. Ultrafiltration water purifier: It can effectively remove harmful substances such as sediment, rust, suspended matter, colloid, bacteria and macromolecular organic matter, and retain mineral trace elements beneficial to human body. The filter element has long service life, large water output, no need of power and pressure, low purification cost and high water utilization rate, and is suitable for purifying a large amount of domestic water.

7. Mixed media filter: According to the functional characteristics of different filter materials, combined with various technologies, a wider range of water quality treatment can be realized, and all kinds of harmful substances in water can be removed comprehensively and effectively. For example, the Quanlai kitchen water purifier takes ultrafiltration as the core component, combined with high-performance KDF, which can not only effectively remove sediment, rust, suspended solids, colloid, bacteria, macromolecular organic matter and so on. From tap water, it can also effectively inhibit the growth of bacteria in water, and remove heavy metals through KDF, making the filtered water safer and healthier; The water utilization rate is as high as 95%, and the water output is large, which can conveniently meet the purification needs of domestic kitchen water.

8. Functional water purifiers: There are still many water purifiers in the market that claim to have health care functions, such as ion water purifiers, spectral water purifiers, magnetized, mineralized and activated water purifiers, but in fact these functional water purifiers do not have the advertised functions, and because these water purifiers do not have real filtering functions, they cannot solve the actual water pollution problem. In July, 2005, the Ministry of Health also issued an announcement, stating that any wading products should not claim to have health care function, and it is forbidden to sell functional water machines such as ion water machines in various places. At present, most water purifiers on the market are aimed at solving the drinking water problem, seeking benefits compared with bottled pure water and competing with bottled water.

According to the filtering structure, there are two ways of water purifier.

One is a completely intercepted filtration mode with a water inlet and a water outlet. The trapped dirt can not be discharged in time, which is easy to be blocked, causing secondary pollution and short service life.

The other is with a flushing port, such as the Quanlai kitchen water purifier, which has a water inlet, a purified water outlet and a flushing port, which can realize automatic flushing of the water purifier, prevent clogging attenuation, prevent secondary pollution and have a long service life.

Characteristic analysis of common water purifiers in the market;

1, general water purifier analysis project general water purifier (double cylinder, triple cylinder or 3+2 type)

Filter material: PP+ activated carbon+external pressure ultrafiltration.

Service life of filter element: intercepting and filtering, easy to block, need to be replaced frequently.

Water quality of produced water: the accuracy is low, and only primary filtration can be carried out, and some large particles are intercepted.

Product maintenance: complex, the filter element needs to be replaced frequently, and it will be replaced in three months.

Safety performance: the shell is easy to burst and the safety factor is low.

Water production capacity: small, generally 2 liters/minute.

Total water production: 4 tons

Practical application: only enough to solve the problem of drinking a small amount of water.

Installation and use: replacing the filter element is troublesome and needs professional installation and replacement.

Filtering mode: interception and filtering, which is easy to produce secondary pollution.

2. reverse osmosis pure water machine analysis project reverse osmosis pure water machine

Filter material: pre-PP+ activated carbon+post-reverse osmosis.

Product price: high

Waste water quantity: large, with a ratio of about 4: 1, or even higher.

Service life of filter element: the front filter element is easy to block and needs to be replaced frequently.

Water quality: too pure, without trace elements needed by human body.

Product maintenance: complex

Operating costs: high, need electricity, need boost.

Use cost: high

Water production capacity: (L/H) is small, generally 8 liters/hour.

Practical application: only enough to solve the drinking water problem.

Installation: complex

3. Love HP Water Purifier Analysis Project Love HP Water Purifier

Filter material: fiber activated carbon

Product price: high

Service life of filter element: intercepting and filtering, easy to block, need to be replaced frequently.

Quality of produced water: the filtration accuracy is low (0.5 micron), and harmful substances such as bacteria cannot be completely removed.

Use cost: high, expensive filter element, need to be replaced once every six months.

Water production capacity: small, generally 2 liters/minute.

Total water output: 6 tons (family type)

Practical application: only enough to solve the drinking water problem.

Filtration mode: interception filtration, one water inlet and one water outlet, which is easy to produce secondary pollution.

Applicable water quality: suitable for western countries with good tap water quality.

Filter element price: higher

4. Comparative analysis of barreled water purifiers on drinking fountains (such as Qinyuan, Midea and Angel)

Filter material: activated carbon+medical stone+ceramics, etc.

Service life of filter element: intercepting and filtering, easy to block, need to be replaced frequently.

Water quality of produced water: the precision is low (the highest is only 0. 1 micron), and only coarse filtration can be carried out, and some large particles are intercepted.

Product maintenance: complex, the filter element needs to be replaced and cleaned frequently.

Water production capacity: weak, generally 0.8 liters/minute.

Total water production: small, only about 3 tons.

Practical application: it is only used to solve the problem of drinking a small amount of water, and it is very troublesome to receive water frequently.

Installation and use: replacing the filter element is troublesome and can only be used on the water dispenser.

Filtering mode: interception and filtering, which is easy to produce secondary pollution.

5, ion water machine, spectrum water machine comparison project ion water machine, spectrum water machine

Principle: electrolysis, only coarse filtration in the front stage.

Function: It claims that it can treat various diseases and has health care function. Do not have the real filtering function, can not filter pollutants in water.

Water output: small, for drinking only.

Market Status: In July, 2005, the Ministry of Health issued an announcement that any wading products should not claim to have health care function, and all localities severely cracked down on ion water machines.

Table of harmful substance diameter

Material name particle size: micron (? m)

Bacteria 0.2 -40

Filter virus 0.02-0. 1

Carbon black 0.0 15-0.09

Asbestos particles 0.06-0.8

More than 100 rust deposit.

Functions of each water purifier:

Objectively speaking, each method has its own advantages and disadvantages. Let me compare the performance of various water treatment methods. Let's look at the most familiar cooking method. Everyone knows that drinking boiled water will make you sick and educate your children. So what harmful substances can be removed after boiling? The answer is: only viruses and bacteria can be eliminated. Let's look at other methods: ozone and ultraviolet sterilization can only remove viruses and bacteria; Precipitation filtration method can only filter sediment; Activated carbon filtration can remove organic matter, odor, pesticide, chloroform and chlorine, partially remove sediment and bacteria, but it can't effectively remove other harmful substances. Ion exchange method can completely remove fluoride and herbicide, and can remove 90%-99% of radioactive particles, but harmful substances such as alkali, calcium, magnesium, phosphorus, cadmium, potassium, sulfur, sodium, arsenic and lead cannot be removed. But by contrast, it is much better than the previous method. Is there any way to remove the residual substances? It is the reverse osmosis method that we will talk about next. Besides those substances that can be effectively removed by ion exchange, other harmful substances in the same sample can also be removed.

How does a water softener soften hard water? Natural water contains various salts, which dissolve in water to form ionic substances. Namely anions and cations. Ionic substances in water will combine into water-insoluble substances when heated or contacted with other solutes (such as detergents). Usually, calcium magnesium slurry in water will form scale or soap scale, which will bring a lot of inconvenience and harm to production and daily life! The ion exchange softening process of water involves hard minerals, mainly calcium and magnesium are exchanged or replaced by sodium minerals. The water softener exchanges hard minerals such as calcium and magnesium dissolved in water with soft minerals such as sodium on the softener resin, and the harm of sodium to the target in contact with it is greatly reduced, mainly because it will not accumulate on its surface like scale. In an appropriate container, water containing hard minerals undergoes ion exchange reaction through artificial ion exchange resin. Resin is a porous and insoluble exchange material. In modern water softener, there are millions of tiny plastic balls (beads), all of which contain many negative charge exchange sites that absorb positive ions. When the resin is in the primary state, these charge exchange sites are occupied by positively charged sodium ions. When calcium and magnesium pass through the resin storage tank, they contact the resin beads and displace sodium ions from the exchange position. Resin preferentially binds cations with strong charges, and the charges of calcium and magnesium ions are stronger than those of sodium ions. Then, the substituted sodium cation flows downwards through the resin "bed" and flows out of the water softener, so that the water softener sends out "soft" water. Finally, all resin exchange positions are occupied by calcium and magnesium, so it is impossible to work any more. The regeneration of water softener resin is carried out with dilute solution of sodium chloride and water. In the regeneration process, firstly, the working water flow of the water softener is stopped, the brine extracted from the brine tank is mixed with another diluted water flow, and the dilute brine solution flows through the resin and contacts with the resin beads loaded with calcium and magnesium ions. Although calcium and magnesium ions have more charges than sodium ions, concentrated salt solution contains millions of weakly charged sodium ions and has the ability to replace a smaller number of calcium and magnesium ions. When calcium and magnesium ions are replaced (after exchange), finally, the exchange position is completely occupied by sodium ions. We say that the resin has been regenerated and is ready for the next softening (working) cycle. At present, the world's major water softener manufacturers have gradually turned their attention to civilian use, among which Yikou Company is the most representative. Compared with similar products commonly used at present, Yikou water softener is controlled by microcomputer on the basis of electromechanical control of fast-flowing high-speed valve. The process of water production, backwashing, salt absorption and regeneration, washing and water injection when the water softener works is completely controlled by microcomputer, fully automatic, and there is no need for special personnel to operate during family use; Yikou water softener adopts flow control, and the microcomputer automatically records the water output and measures the flow, and compares it with the exchange capacity set in the computer to decide whether to regenerate and when to regenerate; Yikou water softener is the first in the world to launch a liquid crystal display device, which can display the time, flow rate, regeneration time, hardness setting, whether it will be regenerated in the next 24 hours and the regeneration capacity of the water softener at that time, so that users can see the working status of the water softener at any time. The microcomputer device of Yikou water softener is equipped with power storage device, which can ensure that the data will not be lost within 48 hours after power failure, and there is no need to reset the program after power failure. Each Yikou water softener is equipped with a flowmeter with a sensitivity as high as 12 ml/s, which provides accurate data for the microcomputer and allows users to get high-quality and assured softened water. What kind of family is suitable for water decoration? Judging from the objective situation of water quality, all water quality with sediment, high-rise water tank supply and high water and alkali content needs to be improved, especially in villas and townhouses outside the city. Families like this usually use their own well water, which is characterized by high sediment content and high water and alkali content. Long-term use will have adverse effects on the health of family members. Judging from the high and low requirements for water quality, families who think that water quality is very important to their health are also suitable for water decoration. To improve water quality, we can choose according to the family's economic conditions. We can improve the quality of drinking water alone or only. Of course, it is best to raise all domestic drinking water and domestic water to the level of high-quality drinking water and water. What is the difference between a water softener and a water softener? Most water softeners and water softeners use cation exchange technology to replace hard ions and reduce or remove water and alkali. The main difference between them is: 1. The water softener can only solve the problem of drinking water because of its limited ability to remove water and alkali; The water softener can not only meet the water consumption, but also meet all household water consumption such as bathing and washing clothes. 2. The installation location is different. The water softener is generally installed at the faucet, and the water softener is generally installed at the water inlet behind the water meter; 3. The ways of regeneration are different. Because the resin is saturated with adsorbed hard ions (water and alkali), it needs to go through the process of salt washing and regeneration to restore its softening ability. The water softener judges whether to start regeneration according to the user's experience, and the whole regeneration process is manually operated; The regeneration process of water softener is generally fully automatic; 4. The effect of regeneration is different. Because the water softener is judged by people, there are inevitably some shortcomings. The regeneration process of the water softener is fully automatic, so it is more reliable. For example, Yikou water softener is not only fully automatic regeneration, but also microcomputer-controlled countercurrent regeneration, so it not only saves salt and water, but also has high quality softened water. Consumers choose water softener or water softener according to their own economic conditions and needs. Generally speaking, the price of water softener is lower and the price of water softener is higher.

Use of kdf:

KDF filter material: It is a special filter material for water treatment produced by KDF Water Treatment Company of the United States with new technology. This kind of filter material has won 14 technical patents, which can effectively separate harmful substances from water and completely purify water quality. Its main functions are: (1) removing 99% free chlorine from water; (2) removing rust from water; (3) removing 98% metal ions in water, such as lead, mercury, nickel and arsenic; (4) inhibiting the reproduction of bacteria and microorganisms; (5) removing hydrogen sulfide.

Microcrystalline carbon composite KDF filter element: American original KDF material, commonly known as platinum ion, is a high-purity copper-zinc particle alloy, which can undergo redox reaction with harmful substances in water, remove heavy metal ions, organic substances, nitrite, hydrogen sulfide, residual chlorine and chloroform, and achieve the effect of purifying water; KDF material can remove more than 95% residual chlorine, prolong the service life of activated carbon by more than 15 times, inhibit bacteria, improve the taste of drinking water and make the water more mellow.