Cooling liquid filter for screw compressor

The utility model discloses a cooling liquid filter for a screw compressor, which comprises a filter shell, and a water inlet and a water outlet are arranged on the side wall of the filter shell; the sealing head is detachably connected to the top of the filter shell, and a water discharging assembly is arranged on the sealing head; the bottom of the inner shell assembly is fixedly connected to the inner wall of the filter shell, and the top is in contact connection with the seal head; a filter lower cavity is formed between the bottom of the inner shell assembly and the inner bottom wall of the filter shell, and a water inlet channel is formed between the outer side wall of the inner shell assembly and the inner side wall of the filter shell; the filter screen is detachably mounted on the end socket; the filter element is arranged in an inner cavity of the inner shell assembly, and two ends of the filter element abut against the inner shell assembly and the end socket respectively; a gap is formed between th