RO reverse osmosis membrane water purifier recommendations: under the kitchen, countertop, wall-mounted, choose which is better?

First, what is reverse osmosis water purifier?

1, the composition of the water purifier
RO reverse osmosis water purifier is a water purifier, it is a set of microfiltration, adsorption, reverse osmosis, ultraviolet sterilization, ultra-purification and so on technology into one, the tap water through layers of analysis into ultra-pure water device; the core of which lies in the RO reverse osmosis membrane, the water filtered out of the membrane is pure water (generally TDS value of 50), you can drink directly, is the highest filtering precision in the current household water purifier. The highest filtration precision in the water purifier is a product.

Currently on the market, RO reverse osmosis water purifier and ultrafiltration water purifier core difference lies in the difference between the membrane used in front of the filter layer is also PP cotton + activated carbon.

2, the principle of RO reverse osmosis
RO reverse osmosis membrane, this layer of membrane is the core of the entire reverse osmosis water purifier, our tap water is not normal flow through, because the density of the water is too large, the pore size of the membrane is too small (0.0001 micron), relying on the natural water pressure is difficult to complete the filtration process, the need to rely on the pressure of the pump, on the pressure in the adequate water molecules can be penetrated by the RO membrane. This is why the RO membrane water purifier needs to be energized, because the pump needs electricity to work. And why is called reverse osmosis, normal osmosis is from the concentration of low to high concentration dilution, but RO reverse osmosis membrane is through the pump pressure to realize the high concentration to the low concentration flow, so it is called reverse osmosis.

Second, the kitchen water purifier need to pay attention to these parameters

1, rated water - service life
How long the water purifier can be used mainly depends on the “rated water”, the cartridge has a life expectancy, such as water purification more than a certain amount, the water purification capacity will be greatly reduced, this time to change the core in a timely manner. Rated total water: in the pure water processor water quality and purification efficiency of the specified pollutants in line with the conditions of GB / T 30307, the rated total water should not be less than the nominal value. Then exactly how to convert it? Assuming that a person a day drinking water is 2L, the rated amount of water purification is 2000L; a person using: rated water purifier 2000L divided by a person 2L / day = 1000 days = 2.73 years. Two people use: rated water purifier 2000L divided by two people 4L / day = 500 days = 1.36 years. Knowing how to calculate, we will not be individual business page fooled, the market is generally 2000L, 4000L, 5500L and so on. Example calculation is just a reference, not absolute, each local water quality problems are different, the degree of filtration loss will be different, just to say that to provide such a way of calculation to everyone in the purchase of the former can refer to.

PS: We must look at the amount of water in the view of the “rated total net water”, some businesses will be put on the life of the RO membrane publicity, this is not true, because a water purifier is to look at all the use of cartridges, other cartridges are generally not as long as the life of the RO membrane.

2, flow rate - water production speed
Water purifier water production speed and two parameters: “membrane specifications, flow (flux)”, the two parameters actually represent the same meaning, the flow rate is calculated by the specifications of the membrane, the flow rate is calculated by the membrane specifications divided by 24 hours divided by 60 minutes, which is equal to how many L (liters) of water can be filtered per minute; and membrane specifications are generally used in units of G (gallon) show. 1G = 3.785L (liters), RO membrane specifications are commonly used 400G, 600G, 800G, 1000G. multi-person use is recommended to choose 1000G is more appropriate, more in line with the needs of our daily use, I use 200ml (ml) of disposable cups of water as an example of the calculations, so that we have a more intuitive feeling, the following is the calculation of different specifications of water production Speed.


3, wastewater ratio - water utilization rate
Water utilization and wastewater ratio, wastewater ratio is RO reverse osmosis water purifier unique parameters, ultrafiltration water purifier does not have the parameter (because RO reverse osmosis filtration is too thorough, a little bit of impurities do not want to).RO reverse osmosis water purifier in the filtration, will generate a large amount of wastewater (undrinkable), ultrafiltration water purifier will not produce wastewater (filtered or retain part of the material).RO reverse osmosis water purifier wastewater The ratio of 2:1 means: every 2 liters of drinking water will produce 1 liter of wastewater, usually RO reverse osmosis water purifier wastewater ratio in 2:1 or 3:1, the bigger the difference between the ratio is the better.

Some people may be scared by this ratio, think drink a mouthful of water, half will be wasted? Don't panic, here as usual to help you calculate an example, with a family of two people, daily we a person's drinking water is about 2L, washing dishes and cooking this is not a good estimate, each family's eating habits are different, cooking at home with different frequencies, generally turn over a 6 to 9 times is enough.

① two families a year total water consumption: two people a day 4L water * 365 days = 1460L a year.
② water purifier wastewater ratio is 2:1, then 1460L divided by 2 = 730L wastewater, total water consumption 1460L + 730L = 2190L a year.
③ Residential water regulations are: 2.8 yuan / cubic meter, taking into account the case of rental housing and property, counting 4 yuan / cubic meter.
④ A cubic meter of water is equal to 1000L, so the amount of wastewater for a year is 730L, which is less than 3 dollars. So after understanding the problem of wastewater, do not have to worry about the transition, life we spend the bulk of the water bill is in the bath, toilet, rather than drinking water / cooking.

Third, the water purifier purchase points
1, choose barrel or no barrel?
Only reverse osmosis models of water purifiers are divided into bucket and bucketless, the current market mainstream is the majority of bucketless, bucketless biggest advantage is to save space, bucket water purifier is too much space under the kitchen, if the kitchen space is tight, bucketless is the best choice; shortcomings: there is a bucket of water because it is used in a real-time water production and water, and there is a pump running work, noise and price will be more expensive than the bucketless.TIPS: Comprehensive market feedback, it is recommended to give priority to the bucketless. Market feedback, it is recommended to prioritize the choice of bucketless water purifiers.

Here to mention a stale water problem, although the reverse osmosis membrane filtration precision is very high, can filter out most of the organic matter, daily we have been using, TDS are in a very low index, but if the interval is not running for a long time (usually more than 6 hours), residual wastewater in the water purifier may penetrate into the side of the RO membrane, thus affecting the first cup of water TDS index, that is, what we call stale water. . Bucketless water purifiers generally have two ways to deal with this.
① Manually choose to drain the first cup of water without drinking,
② Choose a water purifier with a cleaning mechanism to empty inside the machine. The bucket type water purifier because of the storage tank volume is large, the cartridge in the trace residual wastewater, added to the large-capacity water tank, will be diluted, with the impact of the role of energy can be almost ignored.

2, how many mouths to use?
People tend to buy water purifiers only take into account the price and brand, but neglected to fit their actual needs; for example, if you are just a person to use, spend a lot of money on the price, buy a 10000L water purification quota, according to a person 2L / day of drinking water (cooking is calculated separately), you have to 5000 days in order to be consumed, not counting the cost of idleness, which occurs in the process of relocation, maintenance, and other This process of relocation, maintenance and other circumstances, means more likely to occur after-sales costs. So this behavior is purely over-consumption of their own. So in the end, how much capacity to choose, how many specifications of the most appropriate water purifier, you can refer to the “catalog two” “in the parameters of the explanation of their own calculations on the one hand, on the other hand, the old Zheng through years of experience in the use of sharing an intuitive specifications for reference.

3, the brand of the cartridge
Here focus on the RO membrane brand, PP cotton and activated carbon are relatively low technical threshold of the material, the basic production of domestic factories are almost the same, there is not much difference, the supply chain is mature, the price is also cheap and stable; and a water purifier RO membrane price is undoubtedly the most expensive (currently recognized by the market membrane is the best of the Dow), the different configurations of the membrane, to a large extent, determines the market for the water purifier! Pricing. Here to give you a popularization of this point, just so you can understand the market, save the business fooled.

PS: does not advocate that we must buy imported membrane to buy the most expensive, after all, the higher the cost of purchase, the higher the subsequent maintenance costs. Domestic brands: major water purifier brands independent research and development of the ro membrane, there is a Huitong, currently renamed (Times Walton) Imported brands: U.S. Dow, South Korea, Korea, the United States GE, U.S. Hyderabad can, Japan and so on!