Method and apparatus for operating vacuum cleaner
First Claim
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1. An apparatus for operating a vacuum cleaner having a filter to collect dusts and a fan motor to give a suction force to a cleaner, comprising:
- a circuit to apply an electric power to said fan motor;
a circuit to detect an actual rotational speed of the fan motor;
a base driver to control the electric power which is applied to the fan motor;
a microcomputer with a ROM having stored therein a plurality of function tables corresponding to control patterns for a speed command for said fan motor for respective ones of a plurality of different cleaning surfaces, said control pattern being corrected in accordance with a choking state of a vacuum cleaner filter;
means for inputting to the microcomputer the value of the rotational speed derived by said circuit to detect the rotational speed of the fan motor; and
wherein said microcomputer further includes means for selecting one of the function tables on the basis of the value of the actually detected rotational speed and a fluctuation in said rotational speed, comparing the value of the input rotational speed with the control pattern of the selected function table and giving a new command to said base driver on the basis of said comparison value.
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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 cleaner 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.
28 Citations
2 Claims
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1. An apparatus for operating a vacuum cleaner having a filter to collect dusts and a fan motor to give a suction force to a cleaner, comprising:
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a circuit to apply an electric power to said fan motor; a circuit to detect an actual rotational speed of the fan motor; a base driver to control the electric power which is applied to the fan motor; a microcomputer with a ROM having stored therein a plurality of function tables corresponding to control patterns for a speed command for said fan motor for respective ones of a plurality of different cleaning surfaces, said control pattern being corrected in accordance with a choking state of a vacuum cleaner filter; means for inputting to the microcomputer the value of the rotational speed derived by said circuit to detect the rotational speed of the fan motor; and wherein said microcomputer further includes means for selecting one of the function tables on the basis of the value of the actually detected rotational speed and a fluctuation in said rotational speed, comparing the value of the input rotational speed with the control pattern of the selected function table and giving a new command to said base driver on the basis of said comparison value. - View Dependent Claims (2)
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Specification