Low noise air cleaner
First Claim
1. A portable air cleaner having low noise air flow and comprisinga housing defining an air inlet, an air outlet, and an air flow path between said air inlet and said air outlet;
- a centrifugal blower mounted within said air flow path and operable to draw air through said air inlet;
a filter mounted within said housing and disposed to transmit air circulating in said air flow path out of said air outlet;
a conveyor surrounding said blower and defining a scroll shaped passage having one end disposed to receive air from said blower and an opposite end disposed to discharge air into said filter;
said conveyor being shaped and arranged to obstruct all rectilinear paths between said blower and said opposite end to thereby provide low noise air flow between the air inlet and air outlet.
5 Assignments
0 Petitions
Accused Products
Abstract
A portable air cleaner including a housing defining an air inlet, an air outlet, and an air flow path therebetween, a centrifugal blower retained within the air flow path and operable to draw air through the inlet and a filter retained within the housing and disposed to transmit air circulating in the air flow path out of the outlet. Also included is a conveyor surrounding the blower and defining a scroll shaped passage having one end disposed to receive air from the blower and an opposite end disposed to discharge air into the filter, the conveyor being shaped and arranged to obstruct all rectilinear paths between the blower and the opposite end.
89 Citations
17 Claims
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1. A portable air cleaner having low noise air flow and comprising
a housing defining an air inlet, an air outlet, and an air flow path between said air inlet and said air outlet; -
a centrifugal blower mounted within said air flow path and operable to draw air through said air inlet;
a filter mounted within said housing and disposed to transmit air circulating in said air flow path out of said air outlet;
a conveyor surrounding said blower and defining a scroll shaped passage having one end disposed to receive air from said blower and an opposite end disposed to discharge air into said filter;
said conveyor being shaped and arranged to obstruct all rectilinear paths between said blower and said opposite end to thereby provide low noise air flow between the air inlet and air outlet.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A portable air cleaner having low noise air flow and comprising
a housing defining an air inlet, an air outlet, and an air flow path between said air inlet and said air outlet; -
a centrifugal blower mounted within said air flow path and operable to draw air through said air inlet;
a filter mounted within said housing and disposed to transmit air circulating in said air flow path out of said air outlet;
a conveyor surrounding said blower and defining a scroll shaped passage having one end disposed to receive air from said blower and an opposite end disposed to discharge air into said filter; and
wherein said conveyor comprises a ramp surface partially defining said passage and arranged to convey air between said one end and said opposite end and in a direction having a component axial to said centrifugal blower to thereby provide low noise air flow between the air inlet and air outlet.- View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification