What are the advantages and disadvantages of cannonball water purifier and traditional three-barrel water purifier? Which is better for home use?

Flushable filter element (internal pressure ultrafiltration membrane) generally adopts stainless steel cylinder, which is combined with KDF and activated carbon to form a combined filter element with a general life of 2-3 years; Disposable filter elements are generally used in filter bottles and direct drinking machines, and their service life generally does not exceed 1 year (PP cotton and activated carbon), and some can reach 2-3 years (external pressure ultrafiltration membrane and reverse osmosis membrane). What kind of filter element is the future development trend? Different people have different opinions. The author thinks that both have advantages and disadvantages, and different water quality is suitable for different filter elements. Let's make a simple analysis and comparison. As for which is better or worse, it's up to you.

Let's talk about the washable filter element, which is generally a combined filter element, consisting of ultrafiltration membrane +KDF+ activated carbon. Its advantages are simple installation and large water output. It not only saves the pain of replacing the filter element, but also saves a lot of cost of replacing the filter element. Won the love of customers. Everything has two sides, both advantages and disadvantages. The advantages and disadvantages of washable filter elements are also obvious.

First of all, the washable filter element is suitable for water sources with TDS value less than 500, mainly tap water. It is not suitable for river water with serious water pollution, deep well water with TDS higher than 1000, water sources with colloid substances and impurities. Ultrafiltration membrane is generally internal pressure type, the membrane tube is very thin, and the filter element is easy to block. Washing can only wash away the things in the pipe, and the colloidal substance stuck to the pipe wall is very sticky and extremely difficult to wash off. 2-3 years of filter life is only a theoretical value, generally less than 2 years is very good.

Secondly, there is activated carbon in the combined filter element, which is located after the ultrafiltration membrane is washed. Because of its large surface area, activated carbon mainly plays the role of adsorbing different colors, smells and impurities. His life span is generally less than 1 year. More than a year can not only play a role in filtering, but also become the culprit of poisoning. Because the adsorbed impurities are saturated, harmful substances can no longer be adsorbed with the water flow and will be released. At this time, the water purifier could not purify water, but became a poisoner. Therefore, the life of the combined filter element of 2-3 years is not in line with the technological process.

Thirdly, the main component of washable filter element is ultrafiltration membrane, which limits its filtration accuracy. For ordinary impurities, viruses and bacteria, as for improving the taste, fluoride removal, calcium and magnesium ions can do nothing. In addition, the water purifier produces a lot of water, so the contact time between the water to be purified and KDF and activated carbon must be shortened accordingly, which will inevitably reduce the purification effect of KDF and activated carbon. This is also an important aspect that stainless steel cylinder water purifier can not be popularized so far.

After talking about the washable filter element, let's talk about the advantages and disadvantages of disposable filter elements. The advantages of disposable filter element are: high filtration accuracy, and removal of any impurities and viruses. Suitable for any water source, but the time for replacing the filter element is different. But its shortcomings are also obvious.

First of all, frequent replacement of filter elements is labor-consuming, time-consuming and expensive. Not only is it a waste of resources, but it needs to be replaced twice a year, and the cost is about 100 yuan, which must be considered before installation for ordinary wage earners.

Secondly, the water output is small. In order to ensure the full contact of KDF, activated carbon and water and increase the contact time, the water production must be reduced accordingly, which often leads to much less purified water per unit time. Sometimes the place with large water demand per unit time is not suitable. This is also a big disadvantage.

Thirdly, the installation and after-sales are troublesome and occupy a large area. There are many filter cartridges and connectors of disposable filter elements, which increases the possibility of water leakage; The machine with reverse osmosis membrane has many troubles, such as water leakage, non-stop, no water production and too much waste water. These are also important factors that restrict its all-round popularization.

Both washable filter elements and disposable filter elements have their own values, and I think their advantages may be complementary. A water purifier with a washable filter element can cook rice and porridge; Direct drinking machine with disposable filter element can make tea and coffee. This combination may be the most suitable combination at present.