| 摘要 |
An improved filtering device for aquarium tanks and artificial ponds mainly comprises a water injector which is made up of a top cover plate and a water injector base, a multi-layered filtering member and an external shield cup which is used to contain the filtering member with appropriate space wherein the edge of the top cover plate is made to be a thick edge which has an annular slot for an "O" shaped seal washer to be placed on. When the top cover plate and the external shield cup are put together, the thick edge is covered up inside the external shield cup, allowing the "O" shaped seal washer to seal off the internal rim of the external shield cup. The top cover plate further comprises a water inlet and a water discharge switch units connecting to the aquarium tank or the artificial pond, a movable lid which is located in a position corresponding to the top of the motor housing, an air discharge valve which corresponds to an air discharge trough of the injector base, a sealed motor chamber which forms with the top cover plate as a one piece body is located on the water injector base, attached to the sealed motor chamber are dual air discharge troughs, a main water inlet pipe and a main water discharge pipe.
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