| 摘要 |
PROBLEM TO BE SOLVED: To provide a car washing machine that recovers most of remaining water even if a halfway part of a water supply conduit vertically meanders. SOLUTION: A washing-water supply device 15 supplies washing water to injection nozzles 12, 13 provided in a car washing machine body 1. The washing-water supply device is composed of a water tank 31 on the ground side, a flexible washing-water supply pipe 33 which is held while vertically meandering so as to supply washing water in the water tank to a main supply pipe 21 of liquid supply piping 14 via a water pump 32, an air supply pipe 43 connected to the vicinity of the main supply pipe of the washing-water supply pipe and provided with a solenoid switching valve 42 for air at its halfway part, a washing-water return pipe 46 connected to the halfway part of the washing-water supply pipe close to the water tank in order to return washing water in the washing-water supply pipe into the water tank, a three-way solenoid switching valve 45 provided at a portion in the washing-water return pipe where the washing-water return pipe is connected to the washing-water supply pipe, and a control part 47 that controls each valve 42, 45 in order to return washing water remaining in the washing-water supply pipe into the water tank via the washing-water return pipe by air from the air supply pipe. COPYRIGHT: (C)2009,JPO&INPIT
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