| 摘要 |
The utility model relates to a filter for an experimental animal cage box, which is characterized in that an inner core is provided with a valve orifice plate; the valve orifice plate is provided with air holes; and the air holes are provided with counterweight bars matched with the air holes. When the filter is used, the inner core of the filter provided by the utility model is provided with the valve orifice plate, the valve orifice plate is provided with the air holes, the air holes are provided with the counterweight bars matched with the air holes, and the counterweight bars automatically drop in the environments of power off and no wind power so as to automatically open a power-off ventilating and filtering channel, so that an experimental animal can not be suffocated. Thus, real-time effective power-off protection becomes possible when experimental animals are raised in a large scale (thousands of and even tens of thousands of cage boxes). |
