Vacuum cleaner
First Claim
1. A vacuum cleaner comprising:
- a cleaner body provided with an air inlet and an air outlet;
a dust chamber provided in said cleaner body and communicating with said air inlet;
a housing provided in said cleaner body, communicating with said dust chamber and said air outlet and accommodating an electric air blower;
means for selecting inlet suction force levels produced by said electric air blower;
a pressure sensor in communication with the suction side of said electric air blower;
means for comparing an output of a detected pressure from said sensor with a reference value;
means for varying said reference value in proportion to the suction force level selected by said selecting means; and
means for indicating an accumulated state of dust in said dust chamber based upon the comparison result from said comparing means.
1 Assignment
0 Petitions
Accused Products
Abstract
A vacuum cleaner includes a cleaner body provided with an air inlet and an air outlet, a dust chamber provided in the cleaner body and communicating with the air inlet, a housing provided in the cleaner body, communicating with the dust chamber and the air outlet and accommodating an electric air blower, a suction force level selector for the electric air blower, a pressure sensor provided on the suction side of the electric air blower, a comparator for comparing an output of a detected pressure from the pressure sensor with a reference value, a varying device for varying the reference value in proportion to the selected suction force level, and an indicator for indicating an accumulated state of dust in the dust chamber based upon the comparison result from the comparator.
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Citations
7 Claims
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1. A vacuum cleaner comprising:
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a cleaner body provided with an air inlet and an air outlet; a dust chamber provided in said cleaner body and communicating with said air inlet; a housing provided in said cleaner body, communicating with said dust chamber and said air outlet and accommodating an electric air blower; means for selecting inlet suction force levels produced by said electric air blower; a pressure sensor in communication with the suction side of said electric air blower; means for comparing an output of a detected pressure from said sensor with a reference value; means for varying said reference value in proportion to the suction force level selected by said selecting means; and means for indicating an accumulated state of dust in said dust chamber based upon the comparison result from said comparing means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification