EP1313395B1 - A cleaning device for a sensor and a vacuum cleaner comprising such a cleaning device - Google Patents

A cleaning device for a sensor and a vacuum cleaner comprising such a cleaning device Download PDF

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Publication number
EP1313395B1
EP1313395B1 EP00963243A EP00963243A EP1313395B1 EP 1313395 B1 EP1313395 B1 EP 1313395B1 EP 00963243 A EP00963243 A EP 00963243A EP 00963243 A EP00963243 A EP 00963243A EP 1313395 B1 EP1313395 B1 EP 1313395B1
Authority
EP
European Patent Office
Prior art keywords
cleaning device
vacuum cleaner
housing
light
cleaning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00963243A
Other languages
German (de)
French (fr)
Other versions
EP1313395A1 (en
Inventor
Banu Sulamaci
Ebru Gönülkirmaz ÖZALTUG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arcelik AS
Original Assignee
Arcelik AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arcelik AS filed Critical Arcelik AS
Publication of EP1313395A1 publication Critical patent/EP1313395A1/en
Application granted granted Critical
Publication of EP1313395B1 publication Critical patent/EP1313395B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2805—Parameters or conditions being sensed
    • A47L9/281—Parameters or conditions being sensed the amount or condition of incoming dirt or dust
    • A47L9/2815—Parameters or conditions being sensed the amount or condition of incoming dirt or dust using optical detectors

Definitions

  • This invention relates to a vacuum cleaner comprising a cleaning device used to clean a sensor particularly a dust sensor.
  • Dust sensors are formed of two main parts; namely a light emitting device and a light receiving device.
  • Light emitting device is emitting an infrared light beam or like and light receiving device is receiving light emitted by the light emitting device.
  • These devices are arranged in a predetermined position on the air passageway.
  • These light emitting and light receiving devices are placed across each other at fixed positions so that the change in light intensity indicates the amount of dust passing through the suction path.
  • the light received by the phototransistor is decreased so the performance of the dust sensing means is degraded.
  • two kinds of solutions were presented in previous studies;
  • a device providing the cleaning of light emitting and receiving elements comprises cover means for the light emitting and receiving elements. One end of each of these cover means is flush with an inside surface of suction member. There are ringshaped projection means formed on inside surface of the suction member adjacent to and upstream of the light emitting element and the light receiving element to increase the inflow speed of the air including particulate material through a space between the light emitting element and the light receiving element.
  • the projection means includes cuts which form diverging channels, each channel having side walls formed by the cuts, which diverge towards and aligned with one of the light emitting element and the light receiving element to further increase the speed of the air including particulate material passing over the cover means.
  • the object of the present invention is to provide a cleaning device for sensors of any type particularly for optical dust sensors used in vacuum cleaners.
  • Vacuum cleaner (10) comprises a vacuum cleaner body (9), a hose (8), a dust sensor including a light emitter (2a) and a light receiver (2b) located on the air passageway, a housing (1) for the dust sensor and a cleaning device (3) located in the housing (1) in order to clean light emitter (2a) and light receiver (2b) components.
  • the light emitter (2a) and the light receiver (2b) components are placed in a housing (1) on the inlet of the vacuum cleaner body (9) and the cleaning device (3) is placed in the outlet of the hose (8).
  • the canals (4) are placed preferably in reverse sides leading to opposite directions.
  • the cleaning device (3) has one or more pins (5) preferably cylindrical, that move within the canal (4) according to the movement of the cleaning device (3).
  • One or more cleaning members (6) preferably felts to clean the light emitter (2a) and the light receiver (2b) components and one or more holes (7) to let the light pass between the light emitter (2a) and the light receiver (2b) components, are arranged consecutively on the cleaning device (3).
  • Other embodiments might be realized with only one canal (4), one cleaning member (6) and one hole (7).
  • the cleaning devices (3) When the cleaning device (3) is rotated, the cleaning members (6) pass over the light emitter (2a) and the light receiver (2b) and rub them, as in Figure 1 and the adhered dust on the light emitter (2a) and the light receiver (2b) components are removed.
  • the light emitter (2a) and the light receiver (2b) to be operated correctly there should not be any portion of the cleaning member left (6) over them. Therefore when the cleaning device (3) becomes fixed as in Figure 2 , the light emitter (2a) and the light receiver (2b) face eachother since the holes (7) come over the light emitter (2a) and the light receiver (2b) components.
  • the dust sensor operates without any problem since the passageway of the light is open and the light emitter (2a) and the light receiver (2b) are cleaned.
  • the pin (5) When the cleaning device (3) is taken out by a movement in counterclockwise direction, the pin (5) also moves in the counterclockwise direction in the canal (4) and the cleaning members (6) pass over the light emitter (2a) and the light receiver (2b) components, cleaning the soil adhered on them.
  • only one canal (4) which comprises one pin (5) is located in the housing (1) and one cleaning member (6) is arranged on the cleaning device (3) leaving the rest of the cleaning device (3) empty.
  • the cleaning device (3) is rotated such that the cleaning member (6) passes over both of the light emitter (2a) and the light receiver (2b) components, the cleaning member (6) rubs the light emitter (2a) and the light receiver (2b) components and the cleaning device (3) becomes fixed, the hole (7) comes over the light emitter (2a) and the light receiver (2b) components and the passage of the light from light emitter (2a) to light receiver (2b) is provided.
  • the canals (4) are arranged on the cleaning device (3) and the pins (5) are located on the housing (1) in order to provide the movement of the cleaning device (3) within the housing (1).
  • the dust collected on the light emitter (2a) and the light receiver (2b) components does not reach a limit value and the performance loss during the waiting period for the manual cleaning of the light emitter (2a) and the light receiver (2b) is avoided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Vacuum Cleaner (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)

Abstract

A cleaning device (3) for a sensor preferably for a dust sensor having components namely a light emitter (2a) and a light receiver (2b) placed in a housing (1) is movable within the housing (1) and it comprises a cleaning member (6) that cleans the light emitter (2a) and the light receiver (2b) components when it passes over while the cleaning device (3) is moving within the housing (1), and one or more holes (7) that open the path of the light between light emitter (2a) and light receiver (2b) components when the cleaning device (3) comes to its fixed position within the housing (1). The cleaning device (3) is used in a vacuum cleaner (10) having a hose (8) and a vacuum cleaner body (9). The cleaning device (3) is placed in the outlet of the hose (8) in order to clean the light emitter (2a) and the light receiver (2b) components placed in the housing (1) located in the inlet of the vacuum cleaner body (9), when the lose (8) is engaged into the vacuum cleaner body (9).

Description

  • This invention relates to a vacuum cleaner comprising a cleaning device used to clean a sensor particularly a dust sensor.
  • In the prior art, optical dust sensors provided in an air passageway between a suction opening and a dust collecting device are used to detect the dust in the drawn air. Dust sensors are formed of two main parts; namely a light emitting device and a light receiving device. Light emitting device is emitting an infrared light beam or like and light receiving device is receiving light emitted by the light emitting device. These devices are arranged in a predetermined position on the air passageway. These light emitting and light receiving devices are placed across each other at fixed positions so that the change in light intensity indicates the amount of dust passing through the suction path. When these devices are covered with dust, the light received by the phototransistor is decreased so the performance of the dust sensing means is degraded. To overcome this degradation, two kinds of solutions were presented in previous studies;
  • One was an electronic calibration of the system, which can be explained as "sensitivity correction means". In EP 0904723 such a "sensitivity correction means" is described. The aim of the method described in this patent is to increase the amount of light emitted by the emitter proportional to the reduction of light emitted and received caused by the adhering of particles on the sensors. The problem with this method is that, if the amount of light emitted is increased when the window members on the sensors are soiled, after certain period it reaches a limit value where the light intensity can no longer be increased. In this case the window members on the sensors have to be cleaned manually. The user is informed such that soiling of the window members has reached its maximum value and the sensors have to be cleaned.
  • The other solution was cleaning the surface of the sensors with the help of a mechanical device. A similar approach is described in US 5152028 . In this patent an upright vacuum cleaner including a dust sensor is introduced. The problem explained above, is solved by a cleaning member that cleans the surface of the window members by the help of the sliding movement of the vacuum cleaner. Since this is an upright vacuum cleaner, the sliding movement is achieved by the movement of the handle. As the handle reaches 90° angle the sliding member covers the surface of the sensors. One disadvantage of this method is that when the sliding degree is less than 90° but not big enough to completely move out, the sliding member may partially cover the surface of the sensor thus light intensity may be decreased so the sensitivity will be decreased as a result.
  • In US 4937912 , a mounting device for sensors is described. In this patent, it is proposed to form at least one axial channel, leading from the inside to the outside, immediately adjacent to the sensor, through which an air flow is passed due to underpressures and overpressures prevailing in the area of the sensor, which air flow acts to continuously clean the sensitive area of the sensor.
  • In US 5319827 , a device providing the cleaning of light emitting and receiving elements is described. This device comprises cover means for the light emitting and receiving elements. One end of each of these cover means is flush with an inside surface of suction member. There are ringshaped projection means formed on inside surface of the suction member adjacent to and upstream of the light emitting element and the light receiving element to increase the inflow speed of the air including particulate material through a space between the light emitting element and the light receiving element. The projection means includes cuts which form diverging channels, each channel having side walls formed by the cuts, which diverge towards and aligned with one of the light emitting element and the light receiving element to further increase the speed of the air including particulate material passing over the cover means.
  • Documents EP0347223 , EP0443845 and EP0327936 disclose a vacuum cleaner according to the preamble of the independent claim 1.
  • The object of the present invention is to provide a cleaning device for sensors of any type particularly for optical dust sensors used in vacuum cleaners.
  • The cleaning device according to the present invention is illustrated in the drawings, wherein:
    • Figure 1 -
    is the three dimensional front view of the cleaning device when the cleaning members are over the sensor components while the cleaning device is moving.
    Figure 2 -
    is the three dimensional front view of the cleaning device when the holes are over the sensor components while the cleaning device is at fixed position.
    Figure 3 -
    is the side view showing an overall arrangement of a vacuum cleaner according to one embodiment of the invention.
  • The components shown in the drawings have the following numbers:
    • 1-
    Housing
    2a-
    Light emitter
    2b-
    Light receiver
    3-
    Cleaning device
    4-
    Canal
    5-
    Pin
    6-
    Cleaning member
    7-
    Holes
    8-
    Hose
    9-
    Vacuum cleaner body
    10-
    Vacuum cleaner
  • Vacuum cleaner (10) comprises a vacuum cleaner body (9), a hose (8), a dust sensor including a light emitter (2a) and a light receiver (2b) located on the air passageway, a housing (1) for the dust sensor and a cleaning device (3) located in the housing (1) in order to clean light emitter (2a) and light receiver (2b) components. In the preferred embodiment the light emitter (2a) and the light receiver (2b) components are placed in a housing (1) on the inlet of the vacuum cleaner body (9) and the cleaning device (3) is placed in the outlet of the hose (8). There is one or more canals (4) preferably in "L" form, placed in the housing (1) next to the light emitter (2a) and the light receiver (2b) components. The canals (4) are placed preferably in reverse sides leading to opposite directions.
  • The cleaning device (3) has one or more pins (5) preferably cylindrical, that move within the canal (4) according to the movement of the cleaning device (3). One or more cleaning members (6), preferably felts to clean the light emitter (2a) and the light receiver (2b) components and one or more holes (7) to let the light pass between the light emitter (2a) and the light receiver (2b) components, are arranged consecutively on the cleaning device (3). Other embodiments might be realized with only one canal (4), one cleaning member (6) and one hole (7).
  • Since the light emitter (2a) and the light receiver (2b) components are placed in the inlet of the vacuum cleaner body (9) and the cleaning device (3) is placed in the outlet of the hose (8) as shown in Figure 3, when the hose (8) is engaged into the vacuum cleaner body (9), the cleaning device (3) meets the dust sensor and the two cleaning members (6) come across the light emitter (2a) and the light receiver (2b). The user has to rotate the hose (8) so the cleaning device (3) with an angle (here 90°, in clockwise direction) in order to fix the hose (8) into the vacuum cleaner body (9). When the cleaning device (3) is rotated, the cleaning members (6) pass over the light emitter (2a) and the light receiver (2b) and rub them, as in Figure 1 and the adhered dust on the light emitter (2a) and the light receiver (2b) components are removed. For the light emitter (2a) and the light receiver (2b) to be operated correctly there should not be any portion of the cleaning member left (6) over them. Therefore when the cleaning device (3) becomes fixed as in Figure 2, the light emitter (2a) and the light receiver (2b) face eachother since the holes (7) come over the light emitter (2a) and the light receiver (2b) components. The dust sensor operates without any problem since the passageway of the light is open and the light emitter (2a) and the light receiver (2b) are cleaned.
  • When the cleaning device (3) is taken out by a movement in counterclockwise direction, the pin (5) also moves in the counterclockwise direction in the canal (4) and the cleaning members (6) pass over the light emitter (2a) and the light receiver (2b) components, cleaning the soil adhered on them.
  • In another embodiment of this invention, only one canal (4) which comprises one pin (5) is located in the housing (1) and one cleaning member (6) is arranged on the cleaning device (3) leaving the rest of the cleaning device (3) empty. When the cleaning device (3) is rotated such that the cleaning member (6) passes over both of the light emitter (2a) and the light receiver (2b) components, the cleaning member (6) rubs the light emitter (2a) and the light receiver (2b) components and the cleaning device (3) becomes fixed, the hole (7) comes over the light emitter (2a) and the light receiver (2b) components and the passage of the light from light emitter (2a) to light receiver (2b) is provided.
  • In an alternative embodiment of this invention the canals (4) are arranged on the cleaning device (3) and the pins (5) are located on the housing (1) in order to provide the movement of the cleaning device (3) within the housing (1).
  • By using the above explained solutions, the dust collected on the light emitter (2a) and the light receiver (2b) components does not reach a limit value and the performance loss during the waiting period for the manual cleaning of the light emitter (2a) and the light receiver (2b) is avoided.

Claims (7)

  1. A vacuum cleaner (10) comprising a cleaning device (3) for a sensor having a light emitter (2a) and a light receiver (2b) placed in a housing (1) characterized in that the cleaning device (3) is movable within the housing (1) and it comprises a cleaning member (6) that cleans the light emitter (2a) and the light receiver (2b) components by rubbing them when it passes over while the cleaning device (3) is moving within the housing (1), and one or more holes (7) that let the light pass between light emitter (2a) and light receiver (2b) components when the cleaning device (3) comes to its fixed position within the housing (1).
  2. A vacuum cleaner (10) according to Claim 1 characterized in that the cleaning device (3) comprises a pin (5) that moves within a canal (4) placed in the housing (1) letting the cleaning device (3) move and come to its fixed position within the housing (1).
  3. A vacuum cleaner (10) according to Claim 1 characterized in that the cleaning device (3) comprises a canal (4) in which a pin (5) placed in the housing (1) moves, letting the cleaning device (3) move and come to its fixed position within the housing (1).
  4. A vacuum cleaner (10) according to Claim 1 to 3 characterized in that the cleaning device (3) comprises more than one cleaning member (6) and hole (7), that are arranged consecutively.
  5. A vacuum cleaner (10) according to Claim 1 to 4 characterized in that the cleaning members are made of felt.
  6. A vacuum cleaner (10) according to Claim 1 to 4 characterized in that the cleaning members are made of a transparent material.
  7. A vacuum cleaner (10) according to Claim 7 including a hose (8) and a vacuum cleaner body (9) characterized in that the cleaning device (3) is placed in the outlet of the hose (8) where it meets with the vacuum cleaner body (9) in the inlet of which the housing (1) is placed, and the cleaning device (3) moves within the housing (1) when the hose (8) is engaged into the vacuum cleaner body (9) and the cleaning member (6) passes over the light emitter (2a) and the light receiver (2b) which are placed in the inlet of the vacuum cleaner body (9) and the holes (7) come over the light emitter (2a) and the light receiver (2b) components when the cleaning device (3) comes to its fixed position within the housing (1).
EP00963243A 2000-08-07 2000-08-07 A cleaning device for a sensor and a vacuum cleaner comprising such a cleaning device Expired - Lifetime EP1313395B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TR2000/000043 WO2002011599A1 (en) 2000-08-07 2000-08-07 A cleaning device for a sensor and a vacuum cleaner comprising such a cleaning device

Publications (2)

Publication Number Publication Date
EP1313395A1 EP1313395A1 (en) 2003-05-28
EP1313395B1 true EP1313395B1 (en) 2009-06-10

Family

ID=21619302

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00963243A Expired - Lifetime EP1313395B1 (en) 2000-08-07 2000-08-07 A cleaning device for a sensor and a vacuum cleaner comprising such a cleaning device

Country Status (7)

Country Link
EP (1) EP1313395B1 (en)
AT (1) ATE433298T1 (en)
AU (1) AU2000274685A1 (en)
DE (1) DE60042374D1 (en)
ES (1) ES2326859T3 (en)
TR (1) TR200300615T1 (en)
WO (1) WO2002011599A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3031377B1 (en) 2006-05-19 2018-08-01 iRobot Corporation Removing debris from cleaning robots
JP5620127B2 (en) * 2010-03-12 2014-11-05 株式会社東芝 Electric vacuum cleaner
CN111060432A (en) * 2020-01-10 2020-04-24 常熟市易安达电器有限公司 Dust sensor with self-cleaning effect

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3803824A1 (en) 1988-02-09 1989-08-17 Gerhard Kurz INSTALLATION DEVICE FOR SENSORS AND SENSORS
KR910006887B1 (en) 1988-06-15 1991-09-10 마쯔시다덴기산교 가부시기가이샤 Dust detector for vacuum cleaner
JPH03186243A (en) 1989-12-15 1991-08-14 Matsushita Electric Ind Co Ltd Upright type vacuum cleaner
JP3149430B2 (en) 1990-02-22 2001-03-26 松下電器産業株式会社 Upright vacuum cleaner
KR930003937Y1 (en) 1991-08-14 1993-06-25 주식회사 금성사 Apparatus for detecting suction dirt for vacuum cleaner
US6023814A (en) 1997-09-15 2000-02-15 Imamura; Nobuo Vacuum cleaner

Also Published As

Publication number Publication date
AU2000274685A1 (en) 2002-02-18
ATE433298T1 (en) 2009-06-15
ES2326859T3 (en) 2009-10-21
TR200300615T1 (en) 2004-01-21
EP1313395A1 (en) 2003-05-28
DE60042374D1 (en) 2009-07-23
WO2002011599A1 (en) 2002-02-14

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