| 摘要 |
<p>A blown air apparatus (10) includes a source (11) of air, means (F) to blow the air and an air outlet for the blown air, and a control means (14) for controlling the air flow from the source (11), to the outlet (20) the control means (14) including a valve member (22) for opening and closing an air flow path for air from the source (11) to the outlet (20) the valve member (22) having a chamber including at least one flexible wall part and being inflatable to close or open the air flow path, characterised in that there is a control passage (30) for the air extending from the valve member (22) and being in communication within the chamber, the control passage (30) when closed or opened causing the valve member (22) to operate to permit or prevent air to flow along the air flow path, and the control passage (30) when opened or closed respectively, causing the valve member (22) to operate to prevent or permit air to flow along the air flow path.</p> |
