EP0320878A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method for operating vacuum cleaner
Assignee: Hitachi Ltd
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Filing: 1988-12-13
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Granted: —
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Expires: 2008-12-13
Abstract
Abstract In a vacuum cleaner comprising an electric blower (24) and a speed control unit (32) to operate the electric blower at a variable speed, a plurality of kinds of operation control rules of the electric blower are previously stored into the speed control unit, a load current value of the electric blower is always detected during the cleaning and the state of the surface to be cleaned is estimated from the load current value. Thereafter, the operation control rule suitable for the estimated cleaning surface is selected from the operation control rules stored in the speed control unit and the electric blower is rotated on the basis of the selected operation control rule.
Inventors
- 👤 Hisanori Toyoshima
- 👤 Fumio Jyoraku
- 👤 Yoshitaro Ishii
- 👤 Kazuo Tahara
- 👤 Haruo Koharagi
- 👤 Syuji Watanabe
- 👤 Kouichi Saito
- 👤 Kunio Miyashita
- 👤 Tunehiro Endo
- 👤 Wakichiro Hishi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 10:52
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/28; A47L9/2889; A47L9/2805; A47L9/2821; A47L9/2826; A47L9/2831; A47L9/2836; A47L9/2842; A47L9/2894; Y; Y02; Y02B; Y02B40/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
118 words
A method of operating a vacuum cleaner having at least an electric blower (24) and a speed control unit (32) for operating said electric blower at a variable speed, wherein a plurality of kinds of operation control rules for the electric blower (24) are previously stored in said speed control unit (32), a load current value of the electric blower is always detected, the state of a surface to be cleaned is estimated from said load current value during the cleaning, the operation control rule suitable for the estimated cleaning surface is subsequently selected from among the operation control rules stored in the speed control unit, and the electric blower is rotated by the operation control rule selected.
Claim 2
Independent Claim
118 words
A method of operating a vacuum cleaner having at least an electric blower (24) and a speed control unit (32) for operating said electric blower at a variable speed, wherein a plurality of kinds of operation control rules for the electric blower (24) are previously stored in said speed control unit (32), a load current value of the electric blower is always detected, the state of a surface to be cleaned is estimated from said load current value during the cleaning, the operation control rule suitable for the estimated cleaning surface is subsequently selected from among the operation control rules stored in the speed control unit, and the electric blower is rotated by the operation control rule selected.
Claim 3
Dependent Claim
114 words
A method according to claim 1, wherein the operation control rules for the electric blower which were previously stored in the speed control unit include at least: an operation control rule in which a rotational speed of the electric blower is set to be constant even if a wind amount decreases; an operation control rule in which the rotational speed of the electric blower increases when the wind amount decreases; an operation control rule in which the rotational speed of the electric blower decreases when the wind amount decreases; and an operation control rule in which an input to the electric blower is reduced in a state in which no dust is actually sucked.
Claim 4
Dependent Claim
42 words
A method according to claim 1, wherein the operation control rules for the electric blower which were previously stored in the speed control unit include operation control rules suitable for four cleaning surfaces of floor plate, tatami (Japanese mat), carpet, and curtain.
Claim 5
Dependent Claim
37 words
A method according to claim 1, the electric blower is rotated on the basis of a shunt-wound characteristic for a period of time when the load current value of the electric blower is detected during the cleaning.
Claim 6
Dependent Claim
32 words
A method according to claim 1, wherein the state of the cleaning surface or the cleaning object is estimated from a fluctuating range of the load current value within a predetermined time.
Claim 7
Dependent Claim
51 words
A method according to claim 1, wherein the operation control rule suitable for the estimated cleaning surface is automatically selected from among the operation control rules stored in the speed control unit, and one of the operation control rules stored in the speed control unit can be manually switched and selected.
Claim 8
Dependent Claim
28 words
A method according to claim 1, wherein said speed control unit has a microcomputer and the operation control rules for the electric blower are stored in said microcomputer.
Claim 9
Dependent Claim
129 words
A vacuum cleaner comprising: an electric blower (24) for collecting dusts into a dust collector chamber (23) through a suction port (29) by a suction negative pressure; and blower control means (32) for controlling a rotational speed (N) of said electric blower (24), wherein said vacuum cleaner has control rule generating means (33) for generating a plurality of control rules to specify correlations of various kinds of state amounts of the cleaner, switching means (35) for selecting one of the control rules of the control rule generating means, and signal processing means (36) for outputting a control amount to said blower control means so as to make the state amount of the cleaner to be detected coincide with its objective value on the basis of the selected control rule.
Claim 10
Dependent Claim
129 words
A vacuum cleaner comprising: an electric blower (24) for collecting dusts into a dust collector chamber (23) through a suction port (29) by a suction negative pressure; and blower control means (32) for controlling a rotational speed (N) of said electric blower (24), wherein said vacuum cleaner has control rule generating means (33) for generating a plurality of control rules to specify correlations of various kinds of state amounts of the cleaner, switching means (35) for selecting one of the control rules of the control rule generating means, and signal processing means (36) for outputting a control amount to said blower control means so as to make the state amount of the cleaner to be detected coincide with its objective value on the basis of the selected control rule.
Claim 11
Dependent Claim
41 words
A vacuum cleaner according to claim 8, wherein said signal processing means consists of a microcomputer and said control rule generating means consists of memories in which objective value functions of the state amounts based on the control rules are stored.
Claim 12
Dependent Claim
52 words
A vacuum cleaner according to claim 8, wherein said signal processing means consists of a microcomputer, said control rule generating means including independent memories for storing objective value functions of the state amounts based on the control rules, and said switching means selects one of the control rules by attaching/detaching said memories.
References Cited (Backward Citations)
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