| 摘要 |
The present invention discloses a filtering core for fluid, which includes main body and several identify portion. The main body is used to filter fluid. The identify portion are different from one another on color. Their colors are also different from the original color of the main body. When the main body accumulates a certain amount of contaminants, and changes its original color to a second color, the user may match this second color with the closest color on one of the identify portion. Then, he may decide if he needs to replace the filtering core, or wash the main body. This would help the user to enhance the precision judgment on deciding the time to replace the filtering core.
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