EP0362894A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Vacuum cleaner and method for operating the same
Assignee: Hitachi Ltd
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Filing: 1989-10-06
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Granted: —
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Expires: 2009-10-06
Abstract
Abstract An output of an electric driven blower (2) in a cleaner main body (1) is controlled in response to a detection value of a pressure sensor (12) which detects an operation condition in the cleaner main body (1). A change-over level setting value (C₁ , C 1′ ) is provided as an control value for the sensor (12) so as to form a judgement point for changing over a control condition of the blower. A return level setting value (C R′ C 2′ ) is provided as a control value for the sensor so as to form a judgement point for returning to a previous control condition of the blower (2) from a changed-over condition of the blower. When the detection value of the sensor (12) is more than the change-over level setting value, the return level setting value is set higher than the change-over setting value, thereby the output of the blower (2) is increased, or the return level setting value is set a lower than the change-over level setting value, thereby the output of the blower is decreased.
Inventors
- 👤 Fumio Jyouraku
- 👤 Yoshitaro Ishii
- 👤 Hisao Suka
- 👤 Kazuo Tahara
- 👤 Haruo Koharagi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 19:02
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/28; A47L9/2836; A47L9/2842; A47L9/02; A47L9/10; A47L9/19; A47L9/2805; A47L9/2821
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
174 words
A vacuum cleaner comprising a cleaner main body (1) having a filter (4) for catching dusts and an electric driven blower (2) within a main case (3), a detection sensor (12) for detecting an operation condition in said cleaner main body, and a control apparatus (11) provided in said cleaner main body (1) and for controlling an output of said electric driven blower (2) in response to a detection value of said detection sensor (12) wherein as control values in accordance with said detection value of said detection sensor, a change-over level setting value C₁, C 1′ ) for forming a judgement point for changing over a control condition of said electric driven blower and a return level setting value (C R′ , C 2′ ) for a judgement point for returning to a previous control condition of said electric driven blower from a changed-over control condition of said electric driven blower, and an output of said electric driven blower is controlled by said change-over level setting value and said return level setting value.
Claim 2
Dependent Claim
174 words
A vacuum cleaner comprising a cleaner main body (1) having a filter (4) for catching dusts and an electric driven blower (2) within a main case (3), a detection sensor (12) for detecting an operation condition in said cleaner main body, and a control apparatus (11) provided in said cleaner main body (1) and for controlling an output of said electric driven blower (2) in response to a detection value of said detection sensor (12) wherein as control values in accordance with said detection value of said detection sensor, a change-over level setting value C₁, C 1′ ) for forming a judgement point for changing over a control condition of said electric driven blower and a return level setting value (C R′ , C 2′ ) for a judgement point for returning to a previous control condition of said electric driven blower from a changed-over control condition of said electric driven blower, and an output of said electric driven blower is controlled by said change-over level setting value and said return level setting value.
Claim 3
Dependent Claim
51 words
A vacuum cleaner according to claim 1, wherein when said detection value of said detection sensor is more than said change-over level setting value, said return level setting value is set to a higher value than said change-over level setting value, thereby said output of said electric driven blower is increased.
Claim 4
Dependent Claim
50 words
A vacuum cleaner according to claim 1, wherein when said detection value of said detection sensor is more than said change-over level setting value, said return level setting value is set a lower value than said change-over level setting value, thereby said output of said electric driven blower is decreased.
Claim 5
Dependent Claim
68 words
A vacuum cleaner according to claim 1, wherein said control apparatus (11) is provided as a central execution processing apparatus, and said change-over level setting value and said return level setting value are stored in said central execution processing apparatus, and said electric driven blower is controlled by renewing one or both of said change-over level setting value and said return level setting value at a predetermined value.
Claim 6
Dependent Claim
16 words
A vacuum cleaner according to claim 4, wherein said central execution processing apparatus is a microcomputer.
Claim 7
Dependent Claim
23 words
A vacuum cleaner according to claim 4, wherein said output of said electric driven blower is controlled by said central execution processing apparatus.
Claim 8
Dependent Claim
51 words
A vacuum cleaner according to claim 5, wherein when said detection value of said detection sensor is more than said change-over level setting value, said return level setting value is renewed to a higher value than said change-over level setting value, thereby said output of said electric driven blower is increased.
Claim 9
Dependent Claim
50 words
A vacuum cleaner according to claim 5, wherein when said detection value of said detection sensor is more than said change-over level setting value, said return level setting value is renewed to a lower value than said change-over setting value, thereby said output of said electric driven blower is decreased.
Claim 10
Dependent Claim
27 words
A vacuum cleaner according to claim 1, wherein said detection sensor (12) is provided as a pressure sensor for detecting a pressure in said cleaner main body.
Claim 11
Dependent Claim
50 words
A vacuum cleaner according to claim 9, wherein when said detection value of said pressure sensor is more than said change-over level setting value, said return level setting value is set a higher value than said change-over level setting value, thereby said output of said electric driven blower is increased.
Claim 12
Dependent Claim
50 words
A vacuum cleaner according to claim 9, wherein when said detection value of said pressure sensor is more than said change-over level setting value, said return level setting value is set a lower value than said change-over level setting value, thereby said output of said electric driven blower is decreased.
Claim 13
Dependent Claim
68 words
A vacuum cleaner according to claim 9, wherein said control apparatus (11) is provided as a central execution processing apparatus and said change-over level setting value and said return level setting value are stored in said central execution processing apparatus, and said electric driven blower is controlled by renewing one or both of said change-over level setting values and said return level setting value at a predetermined value.
Claim 14
Dependent Claim
77 words
In a vacuum cleaner comprising a sensor for detecting an operation condition in a cleaner main body having a filter and an electric driven blower, and a control portion provided in said cleaner main body and for controlling said electric driven blower in response to a detection value of said detection sensor, a method for operating the vacuum cleaner wherein a detection sensitivity of said detection sensor is varied in response to a suction air flow amount.
Claim 15
Dependent Claim
77 words
In a vacuum cleaner comprising a sensor for detecting an operation condition in a cleaner main body having a filter and an electric driven blower, and a control portion provided in said cleaner main body and for controlling said electric driven blower in response to a detection value of said detection sensor, a method for operating the vacuum cleaner wherein a detection sensitivity of said detection sensor is varied in response to a suction air flow amount.
Claim 16
Dependent Claim
40 words
A method for operating a vacuum cleaner according to claim 13, wherein said detection sensitivity of said detection sensor is varied so as to increase at a side of a small air flow amount of the suction air flow amount.
References Cited (Backward Citations)
No citation records indexed.
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