Novel deionized water filter

The utility model discloses a novel deionized water filter, include: the casing, arrange in filter unit in the casing and connecting respectively access connection pipeline section and outlet connecting tube section that the casing was imported and exported are still including the intercommunication the import pipeline section with the by -pass line of outlet connecting tube section, by -pass line is located the casing is outside, be provided with the protection filter screen in the outlet connecting tube section. The protection filter screen is located by -pass line with outlet connecting tube section intersection's low reaches position. The diameter of protection filter screen is less than 1mm. The protection filter screen is the multilayer filter screen. The protection filter screen is the stainless steel filter screen. Set up the protection filter screen, ensured that the pile performance does not receive the filter to be punctured the influence of back granule. Set up the filter housing that does not flo