Air flow passage for a vacuum cleaner

Abstract

A vacuum cleaner is provided having improved pressure loss characteristics. A fluid supply conduit in flow communication with an inlet to a cyclone is integrally formed as part of a cyclone bin. The present invention may be adapted for use with cyclonic separation devices of all types, including single- and multi-stage cyclonic separators.

Description

[0001] The application is a continuation of application Ser. No. 10 / 816,840, filed on Apr. 5, 2004 which is a continuation of application Ser. No. 10 / 322,541, filed on Dec. 19, 2002 (which is still pending) which is a continuation of application Ser. No. 10 / 188,412, filed on Jan. 7, 2000 now U.S. Pat. No. 6,599,340 which is a continuation-in-part of application Ser. No. 09 / 227,534, filed Jan. 8, 1999 and which has issued as U.S. Pat. No. 6,141,826, and is a divisional of application Ser. No. 09 / 480,168, filed on Jan. 10, 2000 and which has issued as U.S. Pat. No. 6,391,095.FIELD OF THE INVENTION [0002] The present invention relates generally to cyclonic separators. In one particular application, the invention relates to a vacuum cleaner which uses the cyclonic separation of dirt from an air flow as the primary dirt separation mechanism. BACKGROUND OF THE INVENTION [0003] The use of a cyclone, or multiple cyclones connected in parallel or series, has long been known to be advantageou...

AI Technical Summary

Benefits of technology

[0015] The configuration of the air intake conduit according to the present invention advantageously permits a substantial reduction in the back pressure caused by the air flow conduit which conveys the dirty air stream to the cyclone separation means. This reduction in pressure loss in the intake conduit may be used to improve the overall performance of the cyclone separation device. For example, a deeper vacuum may be drawn at the air intake of the cleaning head or other vacuuming device for a given vacuum motor size. Conversely, using the air flow path of the instant invention, the motor size may be reduced without a reduction in cleaning efficiency, thereby permitting a comparable vacuum cleaner to be provided at lesser cost.

Problems solved by technology

If the blockage occurs at a midpoint of the conduit, it may be difficult to clear the blockage.

Further, the addition of a port increases the cost and complexity of the manufacture of the product.

A bend in a conduit for a fluid causes a turbulent pressure loss in the conduit as the fluid travels through the bend in the conduit and the greater the sharpness of the bend, the greater the pressure loss.

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