Differential pressure filter

The utility model relates to the technical field of differential pressure filters, and discloses a differential pressure filter. According to the technical scheme, the filter comprises a filter body, a fine filter cartridge and a coarse filter cartridge are arranged on the upper side wall and the lower side wall of an inner cavity of the filter body, the fine filter cartridge is located in an inner cavity of the coarse filter cartridge, and a gear ring is arranged on the upper side of the outer wall of the coarse filter cartridge. The filter body, the fine filter cartridge, the coarse filter cartridge and the like are matched, so that the device can conveniently filter water to be processed, impurities in the water can be effectively filtered by arranging the two groups of filter cartridges, the filtering effect is enhanced, the filtering quality is improved, and meanwhile, the water flow is accelerated to improve the filtering efficiency; through cooperation of the cleaning frame, the cleaning brush, the coa