Powered air cleaning system and method of making same
First Claim
1. A powered air cleaning system comprising:
- a flow path extending through the system from an inlet to an outlet;
a motor-driven fan located along the flow path to draw particulate debris laden air into the inlet and rotate it about an axis to form a rotating flow that stratifies the debris laden air with the heaviest particles in the outermost orbits of the rotating flow;
an ejector port for ejecting particulate debris laden air under positive pressure from the stratified rotating flow in the system;
an air filter located within the rotating flow and across the flow path upstream of the ejector port and the outlet for filtering air from the innermost orbits of the stratified rotating flow, the air filter being elongated in the direction of said axis, the motor-driven fan operating to maintain a positive air flow pressure on the outer surface of the filter so that the rotating flow about the filter causes a self cleaning action on the filter;
wherein the system includes at least two components defining a portion of the flow path through the system, the at least two components being a detachable fan housing containing the motor-driven fan and a detachable filter housing containing the air filter which the at least two components are separable from the system.
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Accused Products
Abstract
A powered air cleaning system (31) and a method of making the system are disclosed. The system comprises a flow path (22) extending through the system from an air inlet (4) to a clean air outlet (5). A motor-driven fan (24) located along the flow path draws particulate debris laden air into the inlet and rotates it about an axis (A-A) to form a rotating flow that stratifies the debris laden air with the heaviest particles in the outermost orbits of the rotating flow. An ejector port (8) is provided for ejecting particulate debris laden air from the stratified rotating flow in the system to the environment. An air filter (9) located within the rotating flow and across the flow path upstream of the outlet filters air from the innermost orbits of the stratified rotating flow. The system is formed of a plurality of components (2, 3) separately mountable in remote locations (32, 33) in a device to be supplied with clean air. The components are interconnected with an intermediate pipe assembly (34).
69 Citations
21 Claims
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1. A powered air cleaning system comprising:
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a flow path extending through the system from an inlet to an outlet; a motor-driven fan located along the flow path to draw particulate debris laden air into the inlet and rotate it about an axis to form a rotating flow that stratifies the debris laden air with the heaviest particles in the outermost orbits of the rotating flow; an ejector port for ejecting particulate debris laden air under positive pressure from the stratified rotating flow in the system; an air filter located within the rotating flow and across the flow path upstream of the ejector port and the outlet for filtering air from the innermost orbits of the stratified rotating flow, the air filter being elongated in the direction of said axis, the motor-driven fan operating to maintain a positive air flow pressure on the outer surface of the filter so that the rotating flow about the filter causes a self cleaning action on the filter; wherein the system includes at least two components defining a portion of the flow path through the system, the at least two components being a detachable fan housing containing the motor-driven fan and a detachable filter housing containing the air filter which the at least two components are separable from the system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A powered air cleaning system comprising:
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a flow path extending through the system from an inlet to an outlet; a motor-driven fan located along the flow path to draw particulate debris laden air into the inlet and rotate it about an axis to form a rotating flow that stratifies the debris laden air with the heaviest particles in the outermost orbits of the rotating flow; an ejector port for ejecting particulate debris laden air under positive pressure from the stratified rotating flow in the system; an air filter located within the rotating flow and across the flow path upstream of the ejector port and the outlet for filtering air from the innermost orbits of the stratified rotating flow, the air filter being elongated in the direction of said axis so that a positive air flow pressure of the rotating flow about the filter maintained by the motor-driven fan causes a self cleaning action on the filter; and an intermediate pipe assembly forming a portion of the flow path between the motor-driven fan and the air filter so the fan and filter can be remote from one another. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method of making a powered air cleaning system comprising:
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forming a powered air cleaning system as a plurality of components, each defining a respective portion of a flow path through the system from an inlet to an outlet, the components including first and second components, the first component having a motor-driven fan located along the flow path to draw particulate debris laden air into the inlet and rotate it about an axis to form a rotating flow that stratifies the debris laden air with the heaviest particles in the outermost orbits of the rotating flow, and the second component having a separator-ejector chamber in the flow path downstream of the motor-driven fan, the separator-ejector chamber having an ejector port for ejecting particulate debris laden air under positive pressure from the stratified rotating flow in the system, and an air filter located within the separator-ejector chamber and across the flow path upstream of the ejector port and the outlet for filtering air from the innermost orbits of the stratified rotating flow, the air filter being elongated in the direction of said axis so that a positive air flow pressure of the rotating flow about the filter maintained by the motor-driven fan causes a self cleaning action on the filter; separately mounting the first and second components in remote locations in a device to be supplied with clean air; and interconnecting the flow path through the first and second components with an intermediate pipe assembly which forms a portion of the flow path of the system. - View Dependent Claims (21)
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Specification