| 摘要 |
PROBLEM TO BE SOLVED: To provide a drain pipe washing machine which is enhanced in the saving of energy consumed by using an engine, and reduced in unnecessary engine noise. SOLUTION: The drain pipe washing machine is formed of: a conveying pump 3 for delivering washing water W stored in a water storage tank 2; the engine 4 for driving the conveying pump 3; a feed water pipe line 5 for feeding the washing water W, and having a feed water hose 5h having a washing nozzle 5n arranged at the tip thereof, and insertable into a drain pipe P; and a main pressure adjusting valve 6 connected to the feed water pipe line 5 and to a surplus water port 2r of the water storage tank 2. The drain pipe washing machine is further formed of: an opening/closing functional valve 7 connected in parallel with the main pressure adjusting valve 6, and having at least an opening/closing function; a surplus water detecting section 8 for detecting the flow rate of surplus water Wr flowing into the surplus water port 2r of the water storage tank 2; and a control section 9 for switching the opening/closing functional valve 7 to an opening side and the rotation of the engine 4 is switched to a preset low-speed mode when the flow rate is not smaller than a predetermined value based on a detection result of the surplus water detecting section 8, while switching the opening/closing functional valve 7 to a closed side and the low-speed mode of the engine is canceled when the flow rate is smaller than the predetermined value based on the detection result of the surplus water detecting section 8. COPYRIGHT: (C)2009,JPO&INPIT
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