Reverse osmosis is a concept corresponding to osmosis. Gu Ming thought that the solvent (water) in the concentrated solution is pressed into the dilute solution on the other side of the semi-permeable membrane by adding a higher pressure on one side of the concentrated solution than the natural osmotic pressure. This process is contrary to the natural normal osmotic process. Therefore, it can intercept impurities in the water on one side of the membrane, and let the other side of the channel membrane, so as to produce pure water and high-purity water. There are two keys to the production of pure water in reverse osmosis facilities. One is a selective membrane, which we call semi-permeable membrane, but a certain pressure. In short, there are many small pores on the reverse osmosis membrane. The size of these pores is the same as that of water molecules. However, bacteria, viruses, most organic pollutants, and water and ions are much larger than water molecules. Therefore, they cannot be separated from water through the semi-permeable membrane (RO membrane).

The filter element is the heart of the water purifier. Anyone who has used the water purifier must know that only by ensuring the quality of the filter element can pure water be purified. Today, let's talk about the filter elements used in household water purifiers?
1. PP cotton
PP cotton filter element is mainly used to filter suspended impurities in water. With micron as the grading standard, it is common to make the filter element with different densities of the inner and outer layers of the filter aperture of 1, 5, 10, and 20 microns, so that the filter element has greater capacity to absorb pollutants. When selecting the PP cotton filter element, the filter element aperture should be different according to the use situation.
2. Activated carbon
Activated carbon filter element is a kind of carbon with porous structure, which is mainly used to remove organic matters, residual chlorine, color and odor in water. At present, coal, trees, coconut shells or palm are the main raw materials of carbon. In general, the smaller the volume of activated carbon, the larger its total area will be, and the higher the adsorption capacity will be.
3. Ultrafiltration membrane
Ultrafiltration membrane technology is a patented mixture, including a very fine formula of activated carbon. It uses water pressure to spread PRECOAT (multiple pleated filtration) in advance between large ultra-high density multiple pleated fiber layers, and the adsorption area is the size of 80 football fields.
4. RO reverse osmosis membrane
The pore size of RO reverse osmosis filter element is as small as nanometer. Under certain pressure, water molecules can pass through the RO membrane, while inorganic salts, heavy metal ions, organics, colloids, bacteria, viruses and other impurities in the source water cannot pass through the RO membrane, so that the permeable pure water and the impermeable concentrated water can be strictly distinguished.
In addition to the filter element above, we also have quartz sand and KDF filter material in our water purifier, which are not widely used. The most widely used are reverse osmosis and ultrafiltration. So when we choose domestic water purifier, we can learn more about these two aspects, so that we can also get cost-effective products.

Should a water purifier be installed? First, identify whether the water quality is good or not. You can use a transparent glass to connect a glass of water, and observe whether there are floating objects and sinking impurities in the light. If you can see it with the naked eye, it is obviously not up to standard; You can also observe the kettle at home to see if there is a yellow scale in it. If there is any, it means that the hardness of the water is relatively high.
You can smell the water again. If there is a smell, it means that the chlorine in the tap water may exceed the standard; Generally, if the hardness of water is high, the taste will be astringent. In addition, if the water is found to be sticky, it may be contaminated if something is mixed with it when washing hands.
What functions does the water purifier have?
The water purifier, also known as water purifier and water purifier, is equipped with high-precision filtration technology, which can filter and remove the floating substances, heavy metals, bacteria, viruses, residual chlorine, sediment, rust, microorganisms, etc. in the water, thus achieving deep filtration and purification of water quality. Therefore, the function of water purifier is to purify water and ensure our drinking water safety.
According to incomplete statistics, the filter element of a water purifier can intercept a large number of milligrams of rust, organic matter, sediment impurities, and about 4 milligrams of lead in a year. The above organic substances and heavy metal ions are absorbed into the body within one year and accumulated year by year. It can be imagined how harmful they are to human body. So invest a little money every day to install a water purifier, which can not only drink directly and taste good, but also protect the health of the family!
What are the advantages of water purifiers?
1. Clean than boiled water
Many people may think that boiled tap water is also healthy and safe water, but boiled tap water does kill the bacteria in it, but don't forget that their bodies are still in the water. Is it safe to drink it into your stomach? In addition, there are some harmful substances in the water, such as alum, residual chlorine, heavy metals, which cannot be removed after boiling. The water purifier can effectively remove impurities and other harmful substances inside.
2. More effective removal of harmful substances
At present, the domestic water purifier adopts a pure physical filtration method, which can effectively remove the harmful substances such as sediment, rust, colloid, suspended solids, heavy metals, bacteria, antibiotics, scale, and odor from the water, making people feel at ease. Another important factor is whether many people think that the taste of boiled water and bottled water is not good. The water purifier perfectly solves this problem.
Ordinary water faucets can only achieve primary filtration, and rarely reach the level that can be drunk directly.

In recent years, with the improvement of living standards, people have paid more and more attention to healthy drinking water. The appearance of water purifier not only solves the health problem of family drinking water, but also can purify the water pollution problem. Many families have the need to install water purifiers, but in the face of a dazzling array of water purifier products, they do not know how to choose.
So, what kind of water purifier is the best? Is there any practical shopping strategy for reference? Now, let's answer them one by one.
Look at the brand
Brand represents a guarantee of quality and reputation. For water purifiers, brand also represents factors such as product quality, technology and service. Therefore, when selecting water purifiers, we should try to choose powerful and reputable brands to purchase, so that we can be more assured.
Check the function of filter element
At present, the mainstream water purifiers on the market are mainly divided into three types: ultrafiltration membrane, nanofiltration membrane and reverse osmosis membrane.
Among them, ultrafiltration membrane uses "ultrafiltration" technology to remove impurities and bacteria, which can remove macromolecular substances, colloidal substances and other inorganic impurities in water; Nanofiltration membrane is used to filter out heavy metal ions, organic compounds and other inorganic components; Reverse osmosis membrane can effectively improve the minerals in water quality and trace elements in water.
The filtration effect of reverse osmosis is the best.
See flux
A water purifier operates continuously within 24 hours, and can purify the total amount of water. Generally speaking, the greater the flux, the faster the water outflow speed
See rated net water volume
Rated water purification is the core parameter of water purifier, which can reflect the service life of filter element to a certain extent. Therefore, we generally believe that the larger the rated net water volume, the longer the service life of the filter element.
See the cost of core replacement
The filter element of the water purifier needs to be replaced regularly, so when selecting the water purifier, we should not only consider the machine price, but also consider the replacement frequency and cost of the filter element. The price of filter element should not be too high, otherwise the investment in the later stage is too large, and the gain outweighs the loss.
Look at the water outlet mode
There are single outlet and double outlet. Generally, single outlet can only provide purified water, while double outlet can provide pure water and purified water. When only pure water is needed, it does not need electricity and does not produce waste water.
The above points are the items to pay attention to when purchasing water purifiers. If you have any good suggestions and ideas, or want to know more about the purchase strategy of water purifiers, you can also leave a message and let me know. Huiston will bring you more high-quality content.

The filter element for water purification has a service life. The pre-PP cotton needs to be replaced as soon as 1-3 months, the activated carbon needs to be replaced as soon as one year. The service life of RO membrane is about 2 years. For places with poor water quality, the better frequency is higher. The filter element of the water purifier is used to block impurities in the water. After a long time of interception, more and more impurities are attached to its surface, which will affect the passage of water. At the same time, the accumulation of impurities will also accumulate more bacteria, making our water purification can not play the role of purification, but the water becomes more dirty. Therefore, the water purifier can replace the filter element in advance, but not later. Moreover, the current water purifier has the function of reminding the water purifier to change, which can be the faucet, the alarm of the water purifier host, or the intelligent APP reminder.

We can't avoid business trips in our life. The water purifier will not work during this period. If you travel for 3-5 days in a short time, you may find that the water in the water purifier may have a peculiar smell. This is because the purified water is stored in the pipeline or the water tank has deteriorated. You can replace the water in the original pipeline and the water in the water tank through the flushing function of the water purifier, and flush the pipeline at the same time. The same waterproof can eliminate the peculiar smell. If you travel for ten and a half days or even longer, you need to replace the filter element. Because you haven't used it for a long time, the filter element in the water purifier is dehydrated and hard, and it can't absorb water and filter again. You need to replace the filter element to achieve the effect of normal use.

After the water purifier is installed in the new house for the first time, or after the water purifier is replaced with a new filter element, the discharged water will be mixed with black activated carbon, and some will release some white colloidal substances, which is normal, because the newly installed activated carbon filter element will have too fine particles and a little stuck on the edge of the filter element, and some filter elements will also be coated with protective liquid to prevent pollution during transportation or storage, which is harmless to human health, It can be eliminated by opening the faucet and putting more water. It can also be eliminated by putting one or two more buckets of water in the water storage tank. It can be used safely in the future.

Environmental pollution has led to the inability of drinking groundwater in some areas. The tap water in the urban pipe network is affected by the pipeline transmission. The seemingly clear water still contains a lot of impurities, which can be found only after sedimentation. Therefore, we have added a water purification filter in our life to protect the safety of our drinking water at all times. However, the water quality is worse if we do not correctly understand the water purifier. What knowledge does the water purifier need to know?
Filtering accuracy of water purifier
We will find a problem that the higher the filtration accuracy, the higher the price of the water purifier. The seemingly "similar" water purifiers can't really see the mystery. The water purifier depends on the quality of the filter element. The better the filter element material, the higher the density, the higher the water quality produced. The number of filter elements is only the number of filtration times. The number of filter elements is not the factor that determines the water purification accuracy. On the contrary, some water purifiers with fewer filter elements, The filtered water quality will be better, which depends on the cooperation of RO membrane, PP cotton, activated carbon and other filter elements. The precision of the filter element seen on the market is between 0.0001-0.01 microns, and the water purifier reaches 0.0001 microns, which means that only water is left after filtration, and other viruses, microorganisms, calcium and magnesium ions have been filtered. It should be noted here that metal ions in water are not nutritional ingredients, but the source of human stones. So it is right to choose the water purifier with high filtration accuracy.

1. What water purifier will produce waste water in the process of water purification?
Answer: RO membrane water purifier will produce waste water, because when water passes through RO membrane, impurities will be blocked by RO membrane, but these impurities will attach to the surface of RO membrane, so it is necessary to use water to wash away impurities on RO membrane while purifying filtered water, so the water used for washing is called waste water.
2. What is the proportion of wastewater?
At present, there are mainly "1 to 3 (producing 1 cup of pure water will produce 3 cups of waste water)", "1 to 2", "1 to 1" and other waste water ratios. Is it better to have a smaller proportion of waste water?
In fact, there is a problem here: if the RO membrane is not washed clean, there will be some impurities left on the RO membrane, which will reduce the service life of the RO membrane, and the impurities blocking the RO membrane will also reduce the water output and water output speed.
3. What can waste water be used for?
Waste water, dirty water!
We must know that the waste water also reaches the RO membrane filter element after "filtering through the previous filter elements", and most of the impurities have been removed, because the content of some impurities will be relatively high due to the washing water, but it is no problem to use it for household washing, such as washing clothes, washing the toilet, bathing, etc.
Some people don't like to receive waste water in buckets, but it is a pity to discharge it directly into the water. So it is recommended to connect the waste water drainage pipe to the toilet water tank in the bathroom. However, this method needs to embed the pipe in advance during decoration.
However, some people think that the water from the water purifier is mainly used as drinking water for daily life. The amount of waste water produced during the whole day is not much, and it can not waste much water in a month. It is unnecessary to consider too much, unless the "water consumption is very large", the problem of waste water utilization needs to be considered.

Household water purifiers have gradually entered our daily life, but do you really know about water purifiers? Let's give you some relevant knowledge today.
1、 What is the function of water purifier
In our daily life, when our drinking water is delivered to thousands of households, it is often accompanied by serious secondary pollution, which mainly includes red insects, heavy metals, and residual chlorine and hydrocarbons generated after water purification. The main function of water purifier is to help us purify these things, and also improve the sense of drinking water.
2、 How the water purifier works
The water purifier enters the purification system by pumping the tap water into the machine body along the water pipe. In the evolution system, most of the pollutants and harmful substances in the water are intercepted and absorbed through the PP cotton and activated carbon filter element, mainly through the high-density infiltration filter screen above to filter various impurities in the water by water pressure, including red worms, rust, organic floats, sediment, etc, Then, RO reverse osmosis technology is used to further filter out the more subtle carcinogens in the water, such as residual chlorine and excessive heavy metals. Finally, the purified water is released from the faucet, so that people can drink relatively clean water, and the wastewater containing impurities generated during purification is discharged.
3、 What is the purification level of the water purifier
At present, RO reverse osmosis technology is widely used in water purifiers on the market, which can reach 5 levels of filtration
Level 1 5um PP cotton (used to prevent scale, rust, impurities, etc.)
Level 2 Granular activated carbon (for adsorption of chemicals)
Level 3 1um PP cotton or compressed activated carbon (CTO)
Level 4 RO membrane (key filter element)
Level 5 Rear coconut shell activated carbon filter element (used to improve the taste)
The purification capacity is between the drinking water purified by ultrafiltration machine and pure water.
At present, the only recognized purification method in the world that can remove the secondary pollutants, residual chlorine, heavy metals and other substances in tap water caused by filtration is the RO reverse osmosis filter element. Take the "Smith" brand water purifier on the market as an example, and use the MAX3 generation RO reverse osmosis technology water purifier. The so-called RO reverse osmosis principle is to apply greater pressure on the raw water side than the natural osmosis pressure, Make the water molecules reverse osmosis from the side with high concentration to the side with low concentration. Since the pore size of reverse osmosis membrane is far less than hundreds or even thousands of times of the case toxin and bacteria, it can remove impurities, thus achieving the purpose of water softening and purification. Its advantages are small size, suitable for domestic water purifiers.
4、 What is the displacement of water purifier
The discharge capacity of water purifier usually refers to the total amount of purified water that can be produced per hour. The impact of this displacement is that the waiting time of the daily household water purifier will affect the smoothness of the water flow in people's daily life. The higher the corresponding value is, the better. For example, the Smith R600ETD1 water purifier can reach a displacement of 1.6L/min, which is basically consistent with the original water outlet speed of the faucet.
5、 What is in the filter element of the water purifier
The filter element of the water purifier is the most core part of the water purifier. Take the Smith (A.O. Smith) water purifier R600ETD1 AO for example, the composition usually includes
PP cotton is used to filter large particles of impurities.
Carbon fiber can effectively absorb residual chlorine, disinfection by-products, organic matter, color, odor and other impurities in water.
MF filter element to intercept bacteria and viruses
Granular activated carbon is used to improve the taste and make the water sweet and delicious.
The filter element can be said to be the core component that affects the purification capacity of the water purifier. The filter element of many products on the market corresponds to its products. At present, the better one on the market is the five-grade purification filter element, which can complete all the above functions and ensure the purification efficiency.