| 摘要 |
<p>A swimming pool cleaning system (2) is provided which provides both water suction and compressed air to a pool cleaning device. A pump (20) draws water from swimming pool (P) through the pool cleaning device, an attached vacuum hose (14) and a suction line (12). An air inlet port (10) enters the suction line (12) adjacent the pump (20). The pump (20) then compresses the air (A) and pumps the water to a higher pressure simultaneously. The pump (20) is followed by a main pool filter (40) in which the water is filtered and returned to the pool (P) and the compressed air (A) is separated. A compressed air outlet (50) draws the compressed air (A) out of the main pool filter (40) and delivers the compressed air (A) to the pool cleaning device along a compressed air supply line (58). The air inlet port (10) includes a hollow inner tube segment (60) partially surrounded by a resilient outer sleeve (70). A hole (66) in the inner tube segment (60) and beneath the outer sleeve (70) delivers air (A) into suction line (12) only when pressure within the suction line (12) is sufficiently low to pull the outer sleeve (70) away from the inner tube segment (60). The air inlet port (10) is oriented directly adjacent the pump (20) so that a minute steady stream of air (A) is supplied to the pump (20) without overloading the pump (20) or causing the pump (20) to cavitate.</p> |
