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Title:
CENTRAL DUST COLLECTING SYSTEM AND AUTO-RETRACTABLE SOFT TUBE
Document Type and Number:
WIPO Patent Application WO/2019/134063
Kind Code:
A1
Abstract:
A central dust collecting system, comprising a movable dust collecting port (6) and an auto-retractable soft tube (15). The central dust collecting system comprises a fixed main dust collecting device (4), a movable secondary dust collecting device (14), and the auto-retractable soft tube (15) connecting a suction tube of the main dust collecting device (4) and a discharging tube of the secondary dust collecting device (14). The start/stop of the main dust collecting device (4) and the secondary dust collecting device (14) are controlled by a linked switch. An internal pressure of the soft tube (15) is controlled to ensure that the internal pressure is always positive or slightly negative. The system resolves the issues of conventional dust collecting systems, providing a central dust collecting system that has advantages of a low indoor noise level, a light-weight handheld unit, easy cleaning, low energy consumption, and being free from secondary dust pollution. When the dust collecting port (6) is moved away from a surface to be vacuumed, the speed of a motor (11) is lowered to reduce power consumption. When the dust collecting port (6) is moved close to the surface to be vacuumed, the previous state is resumed.

Inventors:
CHEN, Jianping (Room 1803, Building 21 Anxiangli, Chaoyang District, Beijing 1, 100101, CN)
Application Number:
CN2018/000435
Publication Date:
July 11, 2019
Filing Date:
December 28, 2018
Export Citation:
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Assignee:
CHEN, Jianping (Room 1803, Building 21 Anxiangli, Chaoyang District, Beijing 1, 100101, CN)
International Classes:
A47L5/12; A47L9/02; A47L9/28
Foreign References:
CN108158487A2018-06-15
US5274878A1994-01-04
JP2012125528A2012-07-05
CN105782628A2016-07-20
CN101808559A2010-08-18
CN107022816A2017-08-08
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