| 摘要 |
<p>In a spa bath installation, air is supplied in turn to successive adjacent groupings of openings in the bottom of the bath, to give a ripple effect in the water along the bath. A rotary sequencing valve is utilised which comprises a rotatable distributing disc (12) driven by a motor unit (33). The disc is mounted in an air supply chamber (14) and faces an end wall of the chamber presenting four outlet ports (24, 26, 28 and 30) which it exposes in turn through an aperture (32) in the disc. The outlet ports are connected respectively to four groupings of the openings, so to supply air cyclically to the groupings in turn.</p> |
