SELF-CLEANING FILTER ARRANGEMENT WITH ACTIVATION SIGNAL FOR FLOOR CARE APPARATUS
First Claim
1. A floor care apparatus, comprising:
- a filter with an intake and out take; and
a first pressure sensor arranged on the intake and a second pressure sensor arranged on the out take, wherein a predetermined pressure differential between the first and second pressure sensors indicates an undesirable load on the filter and causes activation of a signal to initiate a self-cleaning of the filter.
1 Assignment
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Accused Products
Abstract
A floor care apparatus has a filter with an intake and out take. A first pressure sensor is arranged on the intake while a second pressure sensor is arranged on the out take. A controller connects to the sensors to receive signals indicative of relative pressure. Whenever a predetermined pressure differential between the signals is achieved, an undesirable load on the filter is deemed occurred and initiation of a self-cleaning of the filter begins. In this manner, filter cleaning only occurs on an as-needed basis and user intervention is avoided, thereby adding convenience. The controller is also able to ascertain a clogged airway condition. Various features contemplate pressure sensor signals arranged to scale suction as positive pressures, meeting the predetermined pressure differential at other than a maximum pressure differential between the first and second pressure sensors, and scaling the predetermined pressure differential relative to the maximum pressure differential.
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Citations
22 Claims
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1. A floor care apparatus, comprising:
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a filter with an intake and out take; and a first pressure sensor arranged on the intake and a second pressure sensor arranged on the out take, wherein a predetermined pressure differential between the first and second pressure sensors indicates an undesirable load on the filter and causes activation of a signal to initiate a self-cleaning of the filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A floor care apparatus, comprising:
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a filter with an intake and out take; a first pressure sensor arranged on the intake and a second pressure sensor arranged on the out take, both the sensors providing a signal indicative of pressure; and a controller in receipt of the signals from the sensors, wherein a predetermined pressure differential between the signals indicates an undesirable load on the filter and causes activation of another signal to initiate a self-cleaning of the filter, the controller able to distinguish between the signals from the sensors to either initiate the self-cleaning of the filter or to indicate a clogged airway condition. - View Dependent Claims (13, 14, 15, 16)
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17. A method of using a floor care apparatus, comprising:
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providing a filter with an intake and an out take; arranging a first pressure sensor on the intake and a second pressure sensor on the out take; determining a pressure differential between the first and second pressure sensors; and initiating a self-cleaning of the filter based on the determining. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification