VACUUM CLEANER FILTRATION SYSTEM WITH FILTER CLEANING MODE
First Claim
1. A vacuum cleaner filtration system, comprising:
- a primary separation system;
a filter located downstream of the primary separation system, the filter having an upstream side configured to receive an airflow exiting the primary separation system, and a downstream side fluidly opposite the upstream side;
a vacuum fan;
a primary suction path between the downstream side of the filter and the vacuum fan;
a valve located in the primary suction path and configured to selectively position to block the primary suction path and create a closed passage at the downstream side of the filter;
a secondary suction path between the upstream side of the filter and the vacuum fan; and
a secondary filtration system in the secondary suction path and configured to separate dirt from an airflow passing through the secondary suction path.
1 Assignment
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Accused Products
Abstract
A vacuum cleaner filtration system having a primary separation system and a filter downstream of the primary separation system. The filter has an upstream side to receive an airflow exiting the primary separation system, and a downstream side fluidly opposite the upstream side. The system has a vacuum fan, a primary suction path between the filter'"'"'s downstream side and the vacuum fan, a valve in the primary suction path and configured to selectively position to block the primary suction path and create a closed passage at the filter'"'"'s downstream side, and a secondary suction path between the filter'"'"'s upstream side and the vacuum fan. A secondary filtration system is in the secondary suction path to separate dirt from an airflow passing therethrough, to thereby clean dirt from the filter'"'"'s upstream side. A nozzle may be provided to concentrate the air flow as it enters the secondary suction path.
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Citations
33 Claims
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1. A vacuum cleaner filtration system, comprising:
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a primary separation system; a filter located downstream of the primary separation system, the filter having an upstream side configured to receive an airflow exiting the primary separation system, and a downstream side fluidly opposite the upstream side; a vacuum fan; a primary suction path between the downstream side of the filter and the vacuum fan; a valve located in the primary suction path and configured to selectively position to block the primary suction path and create a closed passage at the downstream side of the filter; a secondary suction path between the upstream side of the filter and the vacuum fan; and a secondary filtration system in the secondary suction path and configured to separate dirt from an airflow passing through the secondary suction path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A process for cleaning a vacuum cleaner filter, the process comprising:
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activating a vacuum fan to generate an airflow; operating in a first mode of operation comprising; directing the airflow through a primary separation system to partially clean the airflow, then directing the airflow through a filter from an upstream side of the filter to a downstream side of the filter, and then directing the airflow through a first passage to the vacuum fan to thereby capture dirt on the filter; and operating in a second mode of operation comprising; blocking the first passage, directing the airflow through the primary separation system to partially clean the airflow, then directing the airflow past the upstream side of the filter, and then directing the airflow through a secondary separation system to thereby remove at least some of the dirt from the filter and capture at least some of the dirt from the filter in the secondary separation system. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification