Filter cleaning apparatus and method
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United States of America Patent
Stats
-
Aug 25, 1987
Grant Date -
N/A
app pub date -
Aug 13, 1979
filing date -
Aug 13, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for cleaning a high efficiency particulate air (HEPA) filter includes a vacuum system having a vacuum nozzle which spans the inlet face of the filter and a nozzle inlet lying closely adjacent the filter face. The nozzle inlet is dimensioned to effectively cover one or more two-cell filter modules formed by the filter media separators. A vacuum or induced draft is applied to the nozzle to provide a cleaning air flow counter to the flow of particulate air through the filter. The nozzle temporarily blocks or retards the flow of particulate air through the module or modules being cleaned while the flow and filtering of particulate air continues through the remaining major portion of the filter. Means and their corresponding method of operation for maintaining the nozzle in contact with the filter inlet face and for moving the same across the filter face for sequential cleaning of the filter modules are also disclosed.
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