How to choose a home reverse osmosis water purifier? Read these points, avoid 90% IQ tax!

How to choose a home reverse osmosis water purifier? Read these points, avoid 90% IQ tax!

What harm does water pollution bring to us?

Pollution outbreaks of environmental hormonal substances may have a long incubation period, thus making people unaware of the approaching threat, resulting in more tragedies!

In the reproductive system, causing infertility and illiteracy

Abnormal development of the fetus, easy to cause defects

Poor immunity in children, affecting the ability of intelligence and mobility

Causes anemia, leading to a variety of stones, resulting in the loss of organ function

Excessive heavy metals, leading to chronic poisoning of internal organs

Cerebral infarction, heart infarction, capillary disease

The World Health Organization found that 80% of human diseases are related to water. Typhoid fever, cholera, gastroenteritis, dysentery, infectious liver disease are the five major diseases of mankind, are caused by unclean water. Modern medicine also found that 80% of human diseases are related to water. When the water contaminated food and drinking water into the human body, the human body may suffer from cancer or other diseases.

RO is the abbreviation of Reverse Osmosis membrane, which means reverse osmosis in Chinese. Reverse osmosis, also known as reverse osmosis, is a membrane separation operation that separates a solvent from a solution by using a pressure difference as the driving force. The general flow of water is from low concentration to high concentration, once the water is pressurized, it will flow from high concentration to low concentration. Pressure is applied to the material on one side of the membrane, and when the pressure exceeds its osmotic pressure, the solvent will reverse osmosis against the direction of natural osmosis, so that the permeated solvent is obtained on the low-pressure side of the membrane, i.e. the permeate. The high-pressure side of the membrane gets the concentrated solution, i.e. the concentrate. If the seawater treatment with reverse osmosis, the low-pressure side of the membrane to get fresh water, the high-pressure side of the brine, the so-called reverse osmosis principle.

And how was reverse osmosis water purification invented?

In 1950, the American scientist DR.S.Sourirajan once unintentionally found seagulls flying in the sea from the surface of the sea slurping up a large mouth of seawater, after a few seconds, spit out a small mouth of seawater and have doubts. Because the land by the lungs breathing animals are absolutely unable to drink high salt seawater, after autopsy found that the seagulls have a layer of film in the body, the film is very precise, seawater by the seagulls inhaled into the body pressurized, and then by the pressure of water molecules through the penetration of the film into freshwater, while containing impurities and high concentration of salt seawater will be spit out of the mouth, which is the basic theoretical structure of the reverse osmosis method, and in 1953 by the University of Florida in the application of the seawater, the seagulls are the first seagulls in the United States. In 1953 by the University of Florida applied to desalination equipment to remove salt.

In 1960 by the U.S. federal government special funding U.S. U.C.L.A. University School of Medicine Professor Dr. S. Sidney Lode with Dr. DR. S. Soirirajan to begin research on reverse osmosis membrane, a year about $ 400 million in funding research to apply to the use of astronauts, so that the spacecraft do not have to carry a large number of drinking water into space. Until 1960, more and more scholars and experts put into the research work, so that the quality and quantity of more refined, so as to solve the human drinking water in the problem.

Reverse osmosis separation membrane technology, is currently a higher filtration precision membrane separation technology. Remove water fine impurities, inorganic salts, organic matter, heavy metal ions, bacteria, trichloromethane and other harmful substances, fully protect human health.

Household reverse osmosis water purifiers are roughly divided into three categories according to style, namely, under-the-kitchen machine, apple machine and box machine.

01 Under-kitchen machine

Advantages: none

Disadvantages:

1, lower face value, only suitable for placing under the cabinet.

2、Head heavy, not convenient to stand alone.

3, the replacement of the cartridge is more troublesome, first put the machine horizontally, even if the water in the machine is drained first, open the cartridge still has the inevitable dripping phenomenon.

4, need to open the host shell to replace the latter two levels of cartridges, although the first four levels of cartridges are general-purpose ten-inch flat mouth cartridge, but because of space issues so the fifth level of activated carbon after the use of quick-connect cartridges, the price is slightly more expensive than the flat mouth cartridges and are not mutually exclusive.

02 Apple

Apple machine is mainly divided into Apple III and Apple V generation, Apple III generation of the first three levels of filter cartridges placed behind the back, after the two levels and the same under the kitchen machine in the host shell, Apple V generation of all the filter cartridges are placed behind the back. The advantage of Apple III and Apple V is that it is smaller, but the disadvantages are also obvious, the last two cartridges are not easy to replace, and the fifth level of activated carbon after the use of quick-connect cartridges.

Highlighting the advantages of the fifth generation machine: 1, higher value, suitable for placing in any position. 2, all the cartridges are in the back, easy to replace. As the cartridge is taken out from above, a more perfect solution to the phenomenon of dripping and bubbling water.3, all the cartridges use ten-inch flat mouth universal cartridges, cheap and common to all brands.

Disadvantages:

1, the old model has a larger volume, but the new model perfectly solves this problem.
2, the cartridge and the kitchen machine, after a long time of use is recommended to clean the inner wall, to prevent the accumulation of dirt.

03 Box machine

Advantages:

1, high value, suitable for placing in any position.

2, the cartridge uses a special cartridge, placed inside the box, it is more convenient to replace.

3, special cartridge without cartridge, no need to clean.

Disadvantages:

1, special cartridges are generally customized by each manufacturer individually, and most of the brands are not common to each other, so it is not easy for consumers to purchase a cartridge in the market that matches their own water purifier. Who bought the water purifier, the later can only rely on this to provide cartridges, disguised as bundled sales. Once the manufacturer changes or closes down, there is a risk of not being able to replace the cartridge resulting in the machine being scrapped. Secondly, special cartridges are individually customized by manufacturers, so the price is generally more expensive. It is three to five times or even more than the general filter, the filter cost is too high will lead to several replacement down the cost of a general filter can buy a flat mouth water purifier, the consumer feels tied to consumption, easy to produce resistance.

2, water purifier is generally composed of five levels of filtration, if the five filter elements placed in the case at the same time in the body will lead to the machine volume is too large, generally take the first three levels or the first three levels of the two levels compressed into a composite cartridge, as opposed to the five filtering filtering effect of a certain difference.

In summary: it is not difficult to see, under the kitchen machine grade is low and the shortcomings are prominent, the advantages and disadvantages of the box machine are more obvious, the only use of universal cartridge Apple five-generation machine a better balance of the above issues.

It is recommended that both the agent sales or consumer purchase should give priority to the use of universal filter cartridge reverse osmosis water purifiers

Purchase of  RO water purifiers should pay attention to several issues:

What is zero stale water

When the water purifier is not used for a few hours, the high concentration of solution in the wastewater will penetrate into the RO membrane, so as to enter the purified water end, and then released pure water mixed with wastewater and become impure, you need to release the water for about a minute, and then release the water is pure water, you can drink directly. Generally only large flux bucketless water purifier of this problem will be more obvious, small flux with a bucket water purifier itself RO membrane filtration area is small, coupled with the dilution of the pressure bucket, TDS value will not rise too high. Family use in fact or small flux water purifier is more practical, the price is not high replacement filter costs are not high, 3.2G pressure bucket can meet the drinking needs of a family of five people, if a large family can choose a larger pressure bucket. At present, zero-aging water technology has developed several generations, which is the best has not been finalized, and then the more complex electrical products do, the higher the probability of failure. I think, in the zero stale water technology has not matured before, rather than high price to buy a water purifier with zero stale water technology, it would be better to buy a cheap water purifier without zero stale water technology, open the water purification faucet in the morning to put more, drink more fresh!

What is dual water

The water filtered through the first three filter cartridges of the water purifier is called water purification, just a simple filtration of rust and sand and other large particles, belonging to the coarse filtration. After filtration still contains bacteria, viruses, heavy metals, antibiotics and other harmful substances, can not be done for drinking, only suitable for washing vegetables, wash your face and so on. Water filtered through the water purifier five-stage cartridge is called pure water, does not contain bacteria, viruses, heavy metals, antibiotics and other harmful substances, can be directly consumed, generally do for the family drinking water. Dual water design is actually more gimmicky than practical, first of all, the effect of washing vegetables and tap water washing vegetables is not much difference, and secondly, pure water and pure water is shared with a clean water faucet, the first use of water, faucet elbow wall will be adhering to some of the water, and then pure water will lead to pure water by the pure water pollution can not reach the standard of direct drinking.

What is water efficiency

Water efficiency is the concept put forward in the mandatory national standard “reverse osmosis water purifier water efficiency limit value and water efficiency grade” on water purifier water efficiency, which refers to the ratio of the amount of purified water obtained to the total amount of water resources consumed. The new version of the standard level of water efficiency, including net water yield and rated total net water volume of these two indicators, each divided into three levels. Three water efficiency net water yield ≥ 45%, rated total net water volume ≥ 2000 liters. Grade II water efficiency net water yield ≥ 55%, rated total net water volume ≥ 3000 liters. A water efficiency water yield ≥ 65%, rated total net water ≥ 4000 liters. Consumers in the choice of reverse osmosis water purifier is often more concerned about the waste water ratio, a water purifier in the use of water efficiency produces less waste water, while three water purifier in the use of water efficiency produces more waste water. A water efficiency although water saving, but the filter life is shorter than the three water efficiency, so the cost of water and filter depends on how consumers weigh.
 

What is an integrated water circuit

A design based on the internal construction of a water purifier, which eliminates the traditional way of working with water purifier accessories connected in series. There are two types of mainstream integrated water circuit boards on the market today: one-piece injection molding and split integrated water circuit.

One-piece injection molding integrated water circuit board is first made of solid core board, and then through the waterway, the advantage is that there is no secondary welding, security, pressure resistance and explosion-proof ability is stronger. Disadvantage is that the waterway are horizontal and vertical, and are 90 degrees at right angles, solenoid valves, cartridges, pumps and other layout will be affected to some extent.

Split integrated water circuit water circuit board made of upper and lower parts, this water circuit board water circuit design is more flexible, but the welding process and the design of the reserved welding line have higher requirements, the current popularity of the better welding method is ultrasonic welding, ultrasonic welding process on the mold material, vibration frequency and the pressure of the paste have higher requirements, the pressure capacity of this water circuit board as well as the overall strength of less than a one-piece injection molding! Molded water circuit board. Advantages of integrated water purifier higher security, the emergence of integrated water purifier reduces the amount of water purifier pipes, connectors, can effectively reduce the risk of leakage due to irregularities in piping insertion and extraction. The disadvantages of integrated water purifier manufacturing costs are high, after-sales costs are also high, because most of the electronic components of the integrated water purifier is also a special model, take the solenoid valve, there is a male and female end, and different manufacturers of the water circuit board interface opening size as well as the depth of the opening and so on, there are differences in the size of the solenoid valve O-ring size as well as the depth of the solenoid valve will be different, so most of the integrated water purifiers need to use the brand-specific fittings, otherwise subtle differences may lead to water leakage.