| 摘要 |
An air pulser includes a housing. The interior of the housing is divided into an air supply chamber and an exhaust chamber by a diaphragm formed with an aperture. An air injection tube is provided in the air supply chamber and configured to be selectively opened and closed by the diaphragm. The exhaust chamber is divided into first and second chambers by a valve plate formed with a valve hole. In the second chamber, a guide tube is fixedly mounted in which a valve body is slidably supported. The valve body carries a permanent magnet adapted to be attracted to the valve plate and carrying a suction disk. A seal member is disposed between the guide tube and the valve plate. A plurality of radial grooves having a V-shaped cross-section are formed on the surface of the valve plate facing the suction plate at its radially inner portion.
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