• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A wet/dry vacuum cleaner having an integrated dust detection module detecting whether dust escapes the filter, and thereby the wet/dry vacuum cleaner, and the wet/dry vacuum cleaner can thereby give warning to the user if this should happen.
    公开号:DK201700370A1
    申请号:DKP201700370
    申请日:2017-06-22
    公开日:2019-01-21
    发明作者:Krogsgaard Holger
    申请人:Producteers A/S；
    IPC主号:
    专利说明:

    Field of the Invention
    The present invention relates to a wet/dry vacuum cleaner. The wet/dry vacuum is configured with a dust detection module which detects if dust is escaping the filter. If dust is detected the user of the vacuum cleaner can be warned and/or the vacuum cleaner operation can be stopped.
    Background of the Invention
    Wet/dry vacuum cleaners are becoming increasing important in many applications such as building and construction where dust more or less hazardous is picked up. Many wet/dry safety vacuum cleaners are configured with special filters to ensure that the dust is captured and is not escaping the filter/vacuum cleaner. In case of worn or damaged filter hazardous dust could escape the filter in an extent that is not visible to the user but still in a concentration that would be hazardous to the user.
    Cost effective optical dust detection modules have been developed during the last decade primarily to be used in air purifiers. When used correctly the application of use of these could be expanded to wet/dry vacuum cleaners.
    In EP1148805B1 is disclosed a system for a vacuum cleaner where the dust detection is based on electrical charged particles. This way of detection has its limitation and consequently it is not used to the same extent as optical dust detection modules.
    In DE9209407U1 is disclosed a system for a vacuum cleaner where the dust detection is based on optical detection. This system is however not applicable for wet/dry vacuum cleaners where the suction stream could contain water if the liquid cut off mechanism would malfunction.
    DK 2017 00370 A1
    Object of the Invention
    It is an object for the present invention to specify a cost-effective dust detection system for a wet/dry vacuum cleaner where not only air can be sucked in to the suction unit but also liquids (in case of mal function of the liquid cut off devise) or as a part of the certification process where the vacuum cleaner will have to demonstrate that liquid/water in the suction unit will not cause any safety issues.
    Description of the Invention
    The object of the present invention can be accomplished by a wet/dry vacuum cleaner compromising:
    - A dust collection tank having at least one suction inlet;
    - a bypass suction unit located inside a housing arranged next to or inside the dust collection tank;
    - the bypass suction unit has a fan inside a fan housing to generate the suction air stream for cleaning and pickup but has also a separate fan for generating the cooling air stream to cool the motor
    - at least one filter arranged to filter air sucked into the dust collection tank through the at least one suction inlet;
    - at least one dust detection module with the purpose of detecting whether any dust has escaped the filter.
    Only a part of the suction stream is guided to the dust detection module. The dust detection module has several electronic components and the lowest part of these electronic components of the dust detection module is located in a bigger distance from ground than the distance from ground to the upper suction air outlet on fan housing when the wet/dry vacuum cleaner is located in its intended working position. This will secure that gravity will prevent liquid that will enter the housing from getting in contact with the electrical components of the dust detection module. The liquid can not only harm electrical components but can also make the optical sensors inside the dust detection module dirty which can affect the dust detection ability.
    DK 2017 00370 A1
    In an embodiment according to the invention the dust detection module is based on optical detection. Optical detection has proved to give a good and cost-effective detection and is used widely in air purifiers.
    In one preferred embodiment according to the invention the dust detection module has an infrared emitting diode, lens and photo transistor. When arranged in the right way this will allow for detection of dust in the air.
    In an embodiment according to the invention the dust detection module has a heater.
    In an embodiment according to the invention the dust detection module gives signal to warning generator which gives an acoustic and/or visual signal to the user of the wet/dry vacuum cleaner if dust concentration above a given level has been detected
    In one preferred embodiment according to the invention the dust detection module stops the bypass suction unit automatically if dust concentration above a given level has been detected.
    In an embodiment according to the invention the dust detection module is air/gas connected to the outlet channel for filtered suction air with one or more air channels.
    The invention is not limited to the described embodiments which can be modified in many ways.
    DK 2017 00370 A1
    Description of the Drawing
    Preferred embodiments of the present invention will now be more particularly described, by way of example, with reference to the accompanying drawing, wherein:
    Figure 1 shows a schematic wet/dry vacuum cleaner;
    Figure 2 shows a schematic wet/dry vacuum cleaner with the air streams
    Figure 3 shows a schematic wet/dry vacuum cleaner with the dust detection module
    Figure 4 shows a schematic of the dust detection module inside the wet/dry vacuum cleaner
    Figure 5 shows a schematic of the wet/dry vacuum cleaner with dust detection module and warning generator
    Figure 6 shows a schematic of the wet/dry vacuum cleaner when liquid enters the vacuum cleaner
    Detailed Description of the Invention
    Figure 1 illustrates a schematic wet/dry vacuum cleaner consisting of a housing 1 and a dust collection tank 2 having a suction inlet 3. Inside the dust collection tank 3 dust or liquid is collected. Inside the dust collection tank 3 a filter 4 is arranged to filter the air/dust sucked in. The housing 1 has an inlet for cooling air to the bypass suction unit 8. The cooling air is exhausted at the cooling air outlet 6. The suction air sucked in escapes the vacuum cleaner at the outlet 5 through the channel 9.
    Figure 2 illustrates a schematic view of the wet/dry vacuum cleaner, wherein the suction air stream 12 generated by the bypass suction unit 8 and particular by the fan inside the fan housing 14 can be seen. As the vacuum cleaner is for both wet and dry the suction unit needs to be of the type “bypass” where the required cooling of the motor cannot be done by the suction air stream 12 as this stream could contain liquid/water. The bypass suction unit 8 has therefore a separate fan 13 for generating a cooling air stream 11.
    DK 2017 00370 A1
    Figure 3 shows a dust detection module 31 inside the housing 1. Part of the suction air stream 32 is led to the dust detection module 31. The electronic components of the dust detection module are located at bigger distance from ground 33 than the distance 34 of the upper outlet of the fan housing 14.
    Figure 4 shows the dust detection module 31 having an infrared emitting diode 41, a heater 42, a lens 43 and a photo transistor 44. These components are located enabling them to detect whether dust is in the air stream
    Figure 5 shows the wet/dry vacuum cleaning having a warning generator 51 connecting to the dust detection module 31. When the dust detection module detects dust concentration in air of a given level a signal as given to the warning generation which can then give a visual and/or acoustic signal to warn the user. The dust detection module could also give signal to motor and stop the operation as the working conditions could be unhealthy.
    Figure 6 shows the wet/dry vacuum cleaner when/if liquid 62 should enter the housing 1. Wet/dry vacuum cleaner has a liquid cut off devise which shall ensure that liquid does not enter then fan unit 14. In case of malfunction of this liquid cut off devise liquid will enter the housing 1 and fan unit 14 and flood the outlet air channel 9. This test is done during the certification according to the relevant norm for wet/dry vacuum cleaners. It is important in this situation that water does not get into the dust detection module and particular the electronic components of this. One or more channels 61 can therefore be seen that will secure that only air, and not liquid, is guided to the dust detection module 31. Liquid in particular dirty water can not only destroy the electronics but also affect the dust detection capability of the dust detection module.
    DK 2017 00370 A1
    NOMEN CLATURE
    1. Housing
    2. Dust collection tank
    3. Suction inlet
    4. Filter
    5. Suction air outlet
    6. Cooling air outlet
    7. Cooling air inlet
    8. Bypass suction unit
    9. Outlet channel for filtered suction air
    11. Cooling air stream
    12. Suction air stream
    13. Fan for cooling air
    14. Fan housing for suction air
    31. Dust detection module
    32. Dust detection air stream
    33. Distance from ground to upper suction air outlet of fan housing
    34. Distance from ground to lowest point of electronic components of dust detection module
    41. Infrared emitting diode
    42. Heater
    43. Lens
    44. Photo transistor
    51. Warning generator
    61. Connection channel
    62. Liquid
    权利要求:
    Claims (7)
    [1] 1. A wet/dry vacuum cleaner compromising:
    - A dust collection tank (2) having at least one suction inlet (3);
    - a bypass suction unit (8) having a separate fan for cooling air (8) and a fan/fan housing (14) generating the suction air stream (12) located inside a housing (1) arranged next to or inside the dust collection tank (2);
    - at least one filter (4) arranged to filter air sucked into the dust collection tank (2) through the at least one suction inlet (3);
    - at least one dust detection module (31) characterised in that only a part of the suction air stream (32) is guided to the dust detection module (31) and that the lowest part of the electronic components of the dust detection module (32) is located in a bigger distance from ground (34) than the distance from ground to the upper suction air outlet on fan housing (33) when the wet/dry vacuum cleaner is located in its intended working position.
    [2] 2. A wet/dry vacuum cleaner according to claim 1, characterised in that the dust detection module (31) is based on optical detection.
    [3] 3. A wet/dry vacuum cleaner according to claim 1 or claim 2, characterised in that the dust detection module (31) has an infrared emitting diode (41), lens (43) and photo transistor (44)
    [4] 4. A wet/dry vacuum cleaner according to one of the preceding claims, characterised in that the dust detection module (31) has a heater (42)
    [5] 5. A wet/dry vacuum cleaner according to one of the preceding claims, characterised in that the dust detection module (31) gives signal to warning generator (51) which gives an acoustic and/or visual signal to the user of the wet/dry vacuum cleaner if dust concentration above a given level has been detected
    [6] 6. A wet/dry vacuum cleaner according to one of the preceding claims, characterised in that the dust detection module (31) stops the bypass suction unit (8) automatically if dust concentration above a given level has been detected.
    DK 2017 00370 A1
    [7] 7. A wet/dry vacuum cleaner according to one of the preceding claims, characterised in that the dust detection module (31) is connected to the outlet channel for filtered suction air (9) with one or more air channels (61).
    类似技术:
    公开号 | 公开日 | 专利标题
    US7303613B2|2007-12-04|Filter sensor and indicator for vacuum cleaners
    US7677962B2|2010-03-16|Electronic device and filtering unit
    CN1340703A|2002-03-20|Moisture-indicator for moisture-absorption dust collector
    JP2008250684A|2008-10-16|Smoke detector and its sampling air providing method
    JP5967525B2|2016-08-10|Dust detector
    US10183250B2|2019-01-22|Dust collector capable of recollecting particulate dust in the filter barrel
    JPWO2016079777A1|2017-04-27|Clean air device and dust inspection method
    JP2009230342A|2009-10-08|Smoke detector
    CN109106286A|2019-01-01|Dust collection equipment and its control device and method
    KR20200001219U|2020-06-12|Particle detection sensor
    DK201700370A1|2019-01-21|Dust Detection Module for Wet/Dry Vacuum Cleaner
    KR100988386B1|2010-10-18|Dust eliminator of fire detector
    KR100786328B1|2007-12-14|Gas detector using explosion protection type vacuum pump
    CN209153415U|2019-07-26|A kind of wet dry vacuum cleaners
    US9730565B2|2017-08-15|Vacuum device
    CN109106287A|2019-01-01|Dust collection equipment and its control device and method
    JP7008252B2|2022-01-25|Particle detection sensor
    JP2010207719A|2010-09-24|Controller of industrial apparatus
    CN207797235U|2018-08-31|Essential oil volatilizer with air detecting function
    JP4993944B2|2012-08-08|Fire detector for high temperature equipment
    JP2014097170A|2014-05-29|Vacuum cleaner
    JPWO2019044250A1|2020-03-26|Particle detection sensor
    JP2008082710A|2008-04-10|Smoke detector
    CN109512333B|2021-07-20|Indicating device of dust collector
    JP2021096022A|2021-06-24|Air cleaner
    同族专利:
    公开号 | 公开日
    WO2018233785A1|2018-12-27|
    EP3641615A1|2020-04-29|
    DK179567B1|2019-02-19|
    EP3641615B1|2021-07-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    KR920007443Y1|1990-07-28|1992-10-15|삼성전자 주식회사|Motor-controller of vacuum cleaner|
    DE4206188C2|1992-02-28|1994-10-13|Fedag Romanshorn Fa|Suction cleaning device|
    CN101730495B|2007-05-15|2013-10-23|皇家器具有限公司|Cyclonic utility vacuum|
    法律状态:
    2019-01-21| PAT| Application published|Effective date: 20181223 |
    2019-02-19| PME| Patent granted|Effective date: 20190219 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201700370A|DK179567B1|2017-06-22|2017-06-22|Wet/dry vacuum cleaner comprising a dust detection module|DKPA201700370A| DK179567B1|2017-06-22|2017-06-22|Wet/dry vacuum cleaner comprising a dust detection module|
    EP18737801.3A| EP3641615B1|2017-06-22|2018-06-13|Wet/dry vacuum cleaner|
    PCT/DK2018/050137| WO2018233785A1|2017-06-22|2018-06-13|Wet/dry vacuum cleaner|
    [返回顶部]