Back washing ultrafiltration water purifier

Abstract

The invention relates to a back washing ultrafiltration water purifier. The back washing ultrafiltration water purifier comprises a raw water inlet, a preposed activated carbon filter element, a PP cotton filter element, a water production ultrafiltration filter element and a postpositive activated carbon filter element which are arranged in a water purification sequence as well as a water purification hole, wherein a first switch is arranged between the preposed activated carbon filter element and the raw water inlet, and the postpositive activated carbon filter element is connected with the water purification hole. The back washing ultrafiltration water purifier also comprises a washing ultrafiltration filter element and a wastewater hole, wherein the washing ultrafiltration filter element is connected with the water production ultrafiltration filter element, the other end of the washing ultrafiltration filter element is connected with a washing water inlet pipeline, a second switch is arranged at the other end of the washing ultrafiltration filter element, and the waste water hole is connected with the preposed activated carbon filter element by virtue of a third switch. The back washing ultrafiltration water purifier is simple in structure, ultrafiltered water is adopted for carrying out back washing completely according to an opposite direction of a water purification waterway, and back washing is carried out on a filter element specifically, so that residual materials can be more effectively washed away, and life of the filter element is prolonged.

Description

technical field [0001] The invention relates to water purification equipment, in particular to the field of flushing filter elements in the purification equipment. . Background technique [0002] 80% of human diseases are related to water. The main disinfection method of tap water is chlorination. Although it can remove a large number of bacteria, there are also harmful substances, especially heavy metals, chlorine molecules and nitrite in the water. Storage, etc. will cause a certain degree of secondary pollution. Although the water is boiled, harmful substances such as heavy metals in the water cannot be removed. Excessive intake of these substances can cause great harm to the human body and threaten human health. Some of the tap water exceeds the standard and does not meet the "Drinking Water Hygienic Standard" of the People's Republic of China. The above-mentioned pollution situation constitutes a great threat to the health of urban and rural people. [0003] The desig...

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Problems solved by technology

[0002] 80% of human diseases are related to water. The main disinfection method of tap water is chlorination. Although it can remove a large number of bacteria, there are also harmful substances, especially heavy metals, chlorine molecules and nitrite in the water. Storage, etc. will cause a certain degree of secondary pollution. Although the water is boiled, harmful substances such as heavy metals in the water cannot be removed. Excessive intake of these substances can cause great harm to the human body and threaten human health. Some of the tap water exceeds the standard and cannot meet the "Drinking Water Hygienic Standard" of the People's Republic of China, and the above-mentioned pollution situation constitutes a great threat to the health of urban and rural people

[0003] The design and structure of existing water purifier products are relatively simple. Generally, one or more filter elements are installed for filtering. After the filter element is used for a period of time, its filtering capacity decreases, and the filtered water quality cannot meet the standard. The treatment of the filter element is generally to replace it.

This will bring two problems. The water quality of the filter element is poor after a period of use, especially in the later period of use; the cost of replacing the filter element is high, and the cost of using the existing filter element is often higher than the direct purchase of industrially filtered water or barrels water, etc.

At present, the backwashing design of the filter element is often complicated in structure. Generally, tap water is used for flushing. If the flushing is not clean, it will bring new pollution. The flushing often cannot be carried out according to the characteristics of the water path, that is, it is carried out in the opposite direction of the water purification path.

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