Method and apparatus for operating vacuum cleaner
First Claim
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1. A method of operating a vacuum cleaner having a filter to collect dusts and a variable speed fan motor to give a suction force to a cleaner, comprising the steps of:
- sequentially detecting a rotational speed of said fan motor at predetermined intervals during the cleaning;
presuming a cleaning surface or an object to be cleaned from a fluctuation mode based on a change in said detected rotational speed within a predetermined sampling time; and
automatically adjusting an input of the fan motor to set the rotational speed to a speed suitable for said presumed cleaning surface or object to be cleaned whereby the rotational speed of the motor can be automatically operated in the optimum condition in accordance with the cleaning surface or object being cleaned.
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Abstract
Method and apparatus for operating a vacuum cleaner in which by detecting a rotational speed of a variable speed fan motor adapted to give a suction force to the cleaner and its change range, the choking state of the filter and the state of the cleaned surface are discriminated, and a speed command of the fan motor is corrected on the basis of the result of the discrimination, and the comfortable cleaning can be performed by the optimum suction force.
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Citations
9 Claims
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1. A method of operating a vacuum cleaner having a filter to collect dusts and a variable speed fan motor to give a suction force to a cleaner, comprising the steps of:
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sequentially detecting a rotational speed of said fan motor at predetermined intervals during the cleaning; presuming a cleaning surface or an object to be cleaned from a fluctuation mode based on a change in said detected rotational speed within a predetermined sampling time; and automatically adjusting an input of the fan motor to set the rotational speed to a speed suitable for said presumed cleaning surface or object to be cleaned whereby the rotational speed of the motor can be automatically operated in the optimum condition in accordance with the cleaning surface or object being cleaned. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of operating a vacuum cleaner having a filter to collect dusts and a variable speed fan motor to give a suction force to a cleaner, comprising the steps of:
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continuously detecting a rotational speed of said fan motor at predetermined intervals during the cleansing; presuming a cleaning surface or an object to be cleaned on the basis of a change in rotational speed within a predetermined sampling time; and controlling an input of the fan motor along a function table which is selected in accordance with the presumed cleaning surface, said selected function table being corrected in accordance with a choking state of the filter whereby the rotational speed of the motor can be automatically operated in the optimum condition in accordance with the cleaning surface or object being cleaned.
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8. A method of operating a vacuum cleaner having a filter to collect dusts and a fan motor to give a suction force to a cleaner, comprising the steps of:
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detecting an actual rotational speed of said fan motor; and giving a speed command to the fan motor on the basis of the value of the detected rotational speed in accordance with a cleaning surface or an object to be cleaned and a choking state of said filter, wherein said speed command is obtained by the following processes; process I . . . a rotational speed N is obtained by calculation; process II . . . the maximum rotational speed Nmax and the minimum rotational speed Nmin are obtained within the sampling time; process III . . . the cleaning surface is presumed and the degree of choking state of the filter is obtained on the basis of the maximum and minimum rotational speeds Nmax and Nmin ; and Process IV . . . one function table is selected from a plurality of function tables and the speed command N* is output by said selected function table;
whereby the rotational speed of the motor can be automatically operated in the optimum condition in accordance with the cleaning surface or object being cleaned. - View Dependent Claims (9)
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Specification