JPS636012U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of a preferred embodiment of the filtration device according to the present invention, FIG. 2 is a longitudinal sectional view of FIG. 1,
3 is a partially cutaway perspective view showing the relationship between the dish-shaped base and the lid of the filtration device shown in FIG. 1; FIG. 4 is an exploded perspective view of the main filter medium cassette of the filtration device shown in FIG. 1;
FIG. 5 is an explanatory diagram of a conventional filtration device. 20: Water intake, 22: Air supply section, 24: Small gravel,
26: Dish-shaped base, 28: Top water intake, 30: Top water return cylinder, 32: Lid, 34: Container body, 36: Water hole, 38: Base lid, 40: Main filter medium cassette,
42: Central hole, 44: Air stone, 46: Filtered water rising path, 48: Annular container, 50: Main filter medium, 5
2: Ring recess, 54, 56: Water hole, 58: Lid member.

Claims (1)

[Scope of utility model registration request] The aquarium water introduced from the bottom water intake port and the top water intake port of the container body is passed through the bottom filter material and the main filter material, and the filtered water is passed through the top water return port along with air bubbles generated from the air stone placed in the center of the container body. In the filtration device, a lid body having a large number of water passage holes is attached to the bottom filter medium of the container body, and an air stone protruding from the center of the lid body communicates with an external air supply system, and further, A filtration device for a fish aquarium, characterized in that a main filter medium is filled in an annular cassette container having a large number of water holes at the top and bottom.