Parallel-connection prefilter

The utility model discloses parallel-connection prefilters. Each prefilter comprises a liquid inlet, an air outlet, a cylinder cover, a cylinder body, a filtering board, a baffle, a filtering cartridge and a liquid outlet, wherein the baffle is in an elliptical ring shape, is placed on the middle part of the cylinder body and is slantways arranged on a horizontal plane in an angle of 45 degrees; the edges of the baffle are in closely contact with the inner surface of the cylinder body; the filtering board is elliptic; the filtering board and the baffle are parallelly put on the baffle; the filtering cartridge which is coaxial with the cylinder body is in a cylinder shape; the top of the filtering cartridge is in an ellipse shape matched with the middle ring shape of the baffle and is embedded in the lower part of the baffle. The prefilter is simple in integral structure, and convenient and reliable to run; the filtering board is arranged on the horizontal plane in the angle of 45 degrees, so that the filtering area is increased, and the filtering speed is improved; the filtering cartridge is embedded in the lower part of the baffle and is used for secondary filtering of liquid, so that the filtering area is increased, and the filtering speed and the filtering effect are improved; according to the actual requirements of users, different filtering styles can be switched, under the condition of meeting the requirements of the users, the cost is furthest saved, so that the parallel-connection prefilters have very good market use value.