| 摘要 |
The present invention relates to a filter used for filtering a liquid. The filter comprises: an upper housing cover; a lower housing cover; and a pleat pack element including a peripheral frame and a folded pleat medium. The frame is molded to cover at least a part of the medium to protect the medium inside the frame. The medium is configured to include at least two types or more of media individually having different filtering densities. A flow control factor changes the current ratio between the first and second media in accordance with the change of at least one among the temperature, pressure, flow rate and/or viscosity of the fluid. |
