| 摘要 |
<p>A mobile cleaning unit for providing high pressure cleaning and rinsing sprays, comprising a van-type vehicle with separate sources of water (10) and cleaning and treating solutions (18, 20, 22, 24). The sprays may be heated by a self-contained water heater (94) with a fuel ignitor (168) operated by low voltage direct current. The separate solutions are selected by a pressure switch (70) sensitive to an increase in spray line pressure caused by stopping the spray by operation of a valve (110) at the spray applicator. The pressure switch acts to sequentially open a supply valve (26, 28, 30, 32) for each solution in turn.</p> |
