Filter and refrigerator

The invention discloses a filter and a refrigerator. The refrigerator comprises the filter, which comprises a filtering bottle and a filtering core, wherein the filtering bottle comprises a bottle body and a top cover, one end of the bottle body is opening, the top cover covers the opening end of the bottle body in a sealed manner, and is provided with a water inlet and a water outlet, the filtering core is arranged in the filtering bottle, the water inlet and the water outlet are separated by the filtering core, the filtering core comprises a cylindrical carbon rod made of carbon powder and atitanium-containing nanometer material, the upper end and the lower end of the carbon rod are opening, a first water chamber is defined by the outer surface of the carbon rod and the inner surface ofthe filtering bottle, a second water chamber is arranged inside the carbon rod, one of the first water chamber and the second water chamber is communicated to the water inlet, and the other one of the first water chamber and