Filter

The utility model discloses a filter, which comprises a shell (1) with a closed accommodating cavity. The filter is characterized in that a filtering pipe (3) and a flow collecting pipe (4) are arranged in the shell (1); the upper end of the filtering pipe (3) is sealed; the lower end of the filtering pipe (3) is fixed and communicated with one end of the flow collecting pipe (4); the other end of the flow collecting pipe (4) penetrates through the shell (1) and extends out of the shell (1); an inner cavity of the shell (1) is communicated with one end which can be communicated with a water inlet pipe (5) of an external water source; the connected part of the pipe wall of the water inlet pipe (5) and the shell (1) is fixed and sealed; and an oil outlet hole (2.1) for discharging greasy dirt is formed in the upper end of the shell (1). The filter disclosed by the utility model is capable of filtering suspended solids and removing the greasy dirt, and does not need to exchange filter materials; and the filter is good in filtering effect, stable in filtering performance, high in efficiency and low in maintenance cost.