Vacuum cleaner
First Claim
1. A vacuum cleaner comprising;
- a vacuum cleaner body,a suction fan which is provided at a predetermined position of the vacuum cleaner body,suction passage means for sucking in air with dust, and for guiding the dust and the air to the vacuum cleaner body,a dust sensor of a light emitting and light receiving type which is provided at a predetermined position along the suction passage means, and has a dust detection sensitivity,sensitivity correction means for correcting the dust detection sensitivity of the dust sensor, andlimit detection means for detecting a condition in which correction of the dust detection sensitivity by the sensitivity correction means reaches a limit value.
1 Assignment
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Accused Products
Abstract
A vacuum cleaner includes a dust sensor of the light emitting and light receiving type, which sensor detects the quantity of dust which is sucked during a cleaning operation. The vacuum cleaner also includes a sensitivity correction section which compensates for lowering of the dust detection sensitivity due to soiling of the dust sensor, a limit detection section which detects a condition in which the compensation of dust detection sensitivity by the sensitivity correction section reaches a limit value, and an information section which informs the vacuum cleaner user of the condition in which correction of the dust detection sensitivity by the sensitivity correction section has reached its limit value.
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Citations
5 Claims
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1. A vacuum cleaner comprising;
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a vacuum cleaner body, a suction fan which is provided at a predetermined position of the vacuum cleaner body, suction passage means for sucking in air with dust, and for guiding the dust and the air to the vacuum cleaner body, a dust sensor of a light emitting and light receiving type which is provided at a predetermined position along the suction passage means, and has a dust detection sensitivity, sensitivity correction means for correcting the dust detection sensitivity of the dust sensor, and limit detection means for detecting a condition in which correction of the dust detection sensitivity by the sensitivity correction means reaches a limit value. - View Dependent Claims (2, 3, 4, 5)
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Specification