| 摘要 |
The swimming pool cleaning device is a submergible structure for drawing water from a tank, such as a swimming pool, to be cleaned, and further for cleaning a submerged surface of the tank, such as the swimming pool floor. The swimming pool cleaning device includes a pair of suction tubes, which communicate with a pressurized source, such as a pump, to suck water from the swimming pool for cleaning and later return to the swimming pool. A flapper valve controls entry of water into the suction tubes, alternating water flow between one tube and the other. The oscillatory flow between the two suction tubes imparts horizontal momentum to the swimming pool cleaning device, allowing the swimming pool cleaning device to travel along a surface of the pool without further user-provided motive force.
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