| 摘要 |
PROBLEM TO BE SOLVED: To provide a car washing machine in which an underside washing device is prevented from freezing during winter and of which a cost and an enlargement can be suppressed.SOLUTION: A car washing machine WA is equipped with an underside washing device 30 in which an injection part 32 33, 34 having an injection nozzle 38 provided on a water conduction pipe 35 is laid on a ground surface, and washes an underside of a washing object car CA by washing water W which is injected upwards from the injection nozzle 38. In the car washing machine, after the washing object car CA of which washing is completed is retracted from the injection part 32, 33, 34, a first draining process T3 in which compressed-air of a prescribed air pressure is supplied to the water conduction pipe 35 thereby draining is carried out, and after completion of the first draining process T3, a second draining process T4 in which compressed-air of an air pressure larger than that in the first draining process T3 is supplied thereby draining is carried out.SELECTED DRAWING: Figure 3 |
