CN112890671A - Household high-efficiency sofa dust collector - Google Patents

Household high-efficiency sofa dust collector Download PDF

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Publication number
CN112890671A
CN112890671A CN202110067020.0A CN202110067020A CN112890671A CN 112890671 A CN112890671 A CN 112890671A CN 202110067020 A CN202110067020 A CN 202110067020A CN 112890671 A CN112890671 A CN 112890671A
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CN
China
Prior art keywords
spoiler
dust
head
dust collector
suction nozzle
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.)
Pending
Application number
CN202110067020.0A
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Chinese (zh)
Inventor
侯伟男
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Individual
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Individual
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 Individual filed Critical Individual
Priority to CN202110067020.0A priority Critical patent/CN112890671A/en
Publication of CN112890671A publication Critical patent/CN112890671A/en
Pending legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L7/00Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details 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
    • A47L9/02Nozzles
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details 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
    • A47L9/02Nozzles
    • A47L9/06Nozzles with fixed, e.g. adjustably fixed brushes or the like
    • A47L9/0693Specially shaped nozzles, e.g. for cleaning radiators, tubes, fans or the like; Dusters
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details 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
    • A47L9/24Hoses or pipes; Hose or pipe couplings
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details 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
    • A47L9/24Hoses or pipes; Hose or pipe couplings
    • A47L9/248Parts, details or accessories of hoses or pipes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)

Abstract

The invention discloses a household high-efficiency sofa dust collector, which relates to the technical field of household appliances and comprises a dust collector, wherein a dust collection head is communicated with a suction port end of the dust collector through a communication pipe, the dust collection head comprises a dust collection head and a connecting pipe, and the dust collection head is communicated with the connecting pipe. According to the invention, the designed spoiler disturbs air entering the suction nozzle head, the spoiler can vibrate when interacting with the air flow, and when the air flow moves regularly, the vibration of the spoiler disturbs the air flow in a reciprocating manner, so that dust in the air flow can also move in a reciprocating manner, and therefore, the dust is not easy to stay for too long time on the same movement track, the probability of the dust being adsorbed on the inner wall is reduced, the accumulation of the dust in the suction nozzle head is reduced, and the cleaning frequency of the dust is reduced.

Description

Household high-efficiency sofa dust collector
Technical Field
The invention relates to a dust collector, relates to the technical field of household appliances, and particularly relates to a household efficient sofa dust collector.
Background
The vacuum cleaner can be divided into a vertical type, a horizontal type and a portable type according to the structure. The working principle of the dust collector is that the blades are driven by the motor to rotate at a high speed, air negative pressure is generated in the sealed shell, and dust is sucked.
In the prior art, the suction nozzle and the hard pipe between the suction nozzle are very easily impacted by absorbed dust due to strong negative pressure generated by the dust collector, and condensed water is very easily generated on the inner walls of the suction nozzle and the hard pipe when the suction nozzle and the hard pipe are used at the moment that the negative pressure stops due to the inflow of atmospheric pressure, so that the inner walls of the suction nozzle and the hard pipe are combined with the dust to cause dust accumulation on the inner wall of a pipeline, and meanwhile, due to the special structures of the suction nozzle and the hard pipe, the suction nozzle and the hard pipe are not convenient to clean and easy to cause pipeline blockage.
Disclosure of Invention
The invention aims to provide a household high-efficiency sofa dust collector, which has the effect of preventing dust accumulation in a pipeline and solves the problem of blockage caused by dust accumulation in the pipeline.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a household high-efficiency sofa dust collector comprises a dust collector, wherein a dust collection head is communicated with a suction port end of the dust collector through a communication pipe, the dust collection head comprises a dust collection head and a connecting pipe, and the dust collection head is communicated with the connecting pipe.
The technical scheme of the invention is further improved as follows: the dust collection head comprises a suction nozzle head, the inlet end of the suction nozzle head is flat, the gap of the inlet end of the suction nozzle head is of a Venturi structure, and the inner wall of the suction nozzle head is connected with a spoiler through a connecting seat.
The technical scheme of the invention is further improved as follows: the spoiler comprises a spoiler, a single-sheet raised head is arranged on the side wall of one end of the spoiler, the cross section of the single-sheet raised head is in a right-angled triangle shape, the small acute angle of the triangle is aligned with the end of the spoiler, two flow guide pointed ends are arranged at the end of the spoiler, the flow guide pointed ends are connected with the side edges of the single-sheet raised head, a vibration foot is arranged at one end of the spoiler far away from the single-sheet raised head, isosceles triangle single-face flow guide grooves are formed in the two side faces of the vibration foot, flow guide lugs are arranged on the spoiler corresponding to the bottom edges of the single-face flow guide grooves, and the spoiler between the flow guide lugs and the single-sheet raised head is fixedly connected with the connecting seat.
The technical scheme of the invention is further improved as follows: the connecting pipe comprises a straight pipe, one end of the straight pipe is provided with a connector connected with the communicating pipe, one end of the straight pipe, far away from the connector, is in threaded connection with the suction nozzle, and a vibrator is fixed inside the straight pipe.
The technical scheme of the invention is further improved as follows: the vibrator includes the trembler, all be fixed with the vortex lug on the both sides face of trembler, the vortex lug of trembler both sides is crisscross the setting mutually, all be equipped with the side water conservancy diversion piece on the both sides of vortex lug, one of trembler serves and is equipped with two terminal feet, fixed connection between the one end that terminal foot was kept away from to the trembler and the inner wall of straight tube.
The technical scheme of the invention is further improved as follows: each flow guide lug comprises two straight plates, the two straight plates are arranged in an inclined mode, and a small opening of each flow guide lug faces to the single-face flow guide groove.
The technical scheme of the invention is further improved as follows: the bottom edge of the single-face diversion trench is flush with the side face of the spoiler, and the depth of the sharp tip of the single-face diversion trench is one third of the thickness of the vibrating foot.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the technical progress that:
1. the invention provides a household high-efficiency sofa dust collector, which is characterized in that air entering a suction nozzle head is disturbed through a designed spoiler, a spoiler can vibrate when interacting with air flow, when the air flow moves regularly, the vibration of the spoiler generates reciprocal disturbance to the air flow, so that dust in the air flow can also move reciprocally, the dust is not easy to stay for too long time on the same movement track, the probability of dust adsorbed on the inner wall is reduced, the accumulation of the dust in the suction nozzle head is reduced, and the cleaning frequency is reduced.
2. The invention provides a household high-efficiency sofa dust collector, which is characterized in that air in a straight pipe is disturbed through a designed vibrating plate, the interaction phenomenon of the vibrating plate and air flow is enhanced under the action of a disturbing lug on the vibrating plate, so that the vibrating plate can vibrate under the pushing of the air flow, and a tail end foot at the tail end of the vibrating plate reciprocates under the influence of vibration, thereby exerting reciprocating acting force on the air flow, increasing the disorder of dust in the air flow and reducing the probability of the dust attached to the inner wall of the straight pipe.
3. The invention provides a household high-efficiency sofa dust collector, which utilizes the inertia of vibration feet and tail end feet during vibration to ensure that the dust collector can be in a vibration state when the dust collector stops, so that the vibration feet and the tail end feet can disturb the inflowing outside air, the probability of occurrence of condensed water caused by inertial compression during the inflowing is avoided, the probability of dust agglomeration caused by excessive combination of dust and the condensed water is reduced, and the cleaning frequency of a suction nozzle head and a straight pipe is further reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a dust collection head according to the present invention;
FIG. 3 is a schematic view of a spoiler construction according to the present invention;
fig. 4 is a schematic diagram of the vibrator of the present invention.
In the figure: 1. a vacuum cleaner; 2. a communicating pipe; 3. a dust collection head;
31. a dust collection head; 32. connecting pipes;
311. a suction nozzle head; 312. a connecting seat; 313. a spoiler;
a1, spoiler; a2, a one-piece nose; a3, a diversion tip; a4, flow guide lug; a5, vibrating feet; a6, single-sided flow guide grooves;
321. a straight pipe; 322. a connector; 323. a vibrator;
b1, vibrating piece; b2, a turbulent flow bump; b3, side guide vanes; b4, terminal pin.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
example 1
As shown in figures 1-2, the invention provides a household high-efficiency sofa dust collector, which comprises a dust collector 1, wherein a dust collection head 3 is communicated with a suction port end of the dust collector 1 through a communication pipe 2, the dust collection head 3 comprises a dust collection head 31 and a connection pipe 32, and the dust collection head 31 is communicated with the connection pipe 32.
In this embodiment, the vacuum cleaner 1 draws air in the suction head 3 to form a negative pressure state therein, and then sucks dust, and the air carrying dust is affected by the internal structure thereof when passing through the suction head 31 and the connecting pipe 32, so that the dust moves more disorderly and is not easily stained on the inner wall.
Example 2
As shown in fig. 2-3, on the basis of embodiment 1, the present invention provides a technical solution: the dust collecting head 31 comprises a suction nozzle 311, the inlet end of the suction nozzle 311 is flat, the gap of the inlet end is a Venturi structure, the inner wall of the suction nozzle 311 is connected with a spoiler 313 through a connecting seat 312, the spoiler 313 comprises a spoiler a1, a single-sheet convex head a2 is arranged on the side wall of one end of the spoiler a1, the cross section of the single-sheet convex head a2 is a right-angled triangle, the small acute angle of the triangle is aligned with the end of the spoiler a1, two flow guide sharp points a3 are arranged at the end of the spoiler a1, the flow guide sharp points a3 are connected with the side edge of the single-sheet convex head a2, a vibration foot a5 is arranged at one end of the spoiler a1 far away from the single-sheet convex head a2, isosceles triangle single-sided flow guide grooves a6 are drilled in the two side faces of the vibration foot a5, a1 corresponding to the bottom edge of the single-sided flow guide groove a6 is provided with a4, the flow guide convex head a4 is connected with the connecting seat 312, each flow guide lug a4 comprises two straight plates which are obliquely arranged, a small opening of the flow guide lug a4 faces to the single-side flow guide groove a6, the bottom edge of the single-side flow guide groove a6 is flush with the side surface of the spoiler a1, and the depth of the sharp-angled tip of the single-side flow guide groove a6 is one third of the thickness of the vibrating foot a 5.
In this embodiment, the airflow is blocked by the flow guiding nib a3 and is divided into three streams, the airflow in the three streams impinges on the single-piece nib a2, the single-piece nib a2 has unbalanced weight, which causes the single-piece nib a1 to vibrate, the middle position of the spoiler a1 is fixed, so the two ends of the spoiler a1 resonate under the action of lever separation, then the airflow is guided by the flow guiding tab a4 to intensively surge towards the single-side flow guiding groove a6 after passing through the single-piece nib a2, the single-side flow guiding groove a6 blocks the airflow, so the reaction force directly acts on the vibrating foot a5, which causes the vibration, under the condition of continuously applying potential energy, the vibration frequency and amplitude of the vibrating foot a5 become large, which causes disturbance to the inside of the nozzle head 311, and the dust in the airflow is continuously applied with reciprocating force, which can not be easily attached to the inner wall, and when the cleaner stops, the continuous vibration of the water-cooled generator can also disturb the entering air, slow down the pressure increase speed and adjust the pressure direction, so that the water is not easy to condense out.
Example 3
As shown in fig. 2 and 4, on the basis of embodiment 1, the present invention provides a technical solution: the connecting pipe 32 comprises a straight pipe 321, one end of the straight pipe 321 is provided with a connector 322 connected with the communicating pipe 2, one end of the straight pipe 321, which is far away from the connector 322, is in threaded connection with the suction nozzle 311, a vibrator 323 is fixed inside the straight pipe 321, the vibrator 323 comprises a vibrating plate b1, two side faces of the vibrating plate b1 are both fixed with a turbulent flow bump b2, turbulent flow bumps b2 on two sides of the vibrating plate b1 are arranged in a mutually staggered mode, two sides of the turbulent flow bumps b2 are both provided with side flow deflectors b3, one end of the vibrating plate b1 is provided with two end feet b4, one end of the vibrating plate b1, which is far away from the end foot b4, is fixedly.
In this embodiment, when the wind current passes through the spoiler bump b2, the wind current is guided by the side deflectors b3 on both sides thereof, so that the wind current is compressed, the vibration plate b1 is displaced by using the reaction force during compression, and because the spoiler bumps b2 on both sides of the vibration plate b1 are arranged in a staggered manner, the wind current can continuously apply thrust to the vibration plate b1, so that the vibration of the vibration plate b1 is increased, thereby the adjustment of the direction of the wind current is completed, because only one end of the vibration plate b1 is fixed with the straight pipe 321, the terminal pin b4 at the terminal thereof is less interfered by other forces during vibration, can continuously vibrate, and realizes disturbance of the wind current.
The working principle of the household high-efficiency sofa dust collector is described in detail below.
When the dust collector is used, the dust collector 1 is opened, then the port of the suction nozzle 311 is pressed on the surface of the cloth sofa, in the process, the dust collector 1 extracts air, then the inside of the suction nozzle 3 forms a negative pressure state through the communicating pipe 2, so that the effect of sucking dust on the sofa by using the external atmospheric pressure is achieved, when the air flow passes through the suction nozzle 31, the air at the port can be preliminarily compressed by the Venturi structure of the suction nozzle 311, then the air is blown into the inside of the suction nozzle 311, the air flow entering the inside of the suction nozzle 311 is divided into three strands under the action of the diversion cusp a3, the middle part is compressed due to the influence of the gradually-changed narrow pipeline formed by the diversion cusp a3, then the high-pressure air flow impacts the single-sheet raised head a2, at the moment, because the single-sheet raised head a2 is of a single-side structure, the reaction force of impact is blocked, so that the air flow is displaced, and the air flow is reset under the elastic force, vibration is generated, the middle section of the spoiler a1 is fixedly limited by the connecting seat 312, so that levers are formed at two ends of the spoiler a1, the vibration feet a5 simultaneously vibrate according to the lever principle, then the air current passing through the single sheet raised head a2 enters the flow guide lug a4 under the action of air pressure, further is compressed by the flow guide lug a4, the secondarily formed high-pressure air current enters the single-side flow guide groove a6 and is blocked by the single-side flow guide groove a6, under the synchronous action of the vibration feet a5 and the compression of the single-side flow guide groove a6, the interaction force between the vibration feet a5 and the air aggravates the vibration of the vibration feet a5, further the disturbance of the vibration feet a5 to the air is increased, the purpose of disturbance to the turbulence is realized, when the dust remover stops, and the external air flows in, the vibration feet a5 continuously vibrate under the action of inertia to cause the disturbance to the inflow air current, and the inflow air current is prevented from converging towards the center under, the phenomenon of condensing water is generated by compression;
when the airflow enters the straight pipe 321, the airflow is compressed by the side flow deflector b3 when passing through the turbulence lug b2, so that the turbulence lug b2 is displaced under the reaction of pressure, the airflow which continuously gushes provides continuous displacement for the turbulence lug b2, and meanwhile, the airflow resets under the action of the elasticity of the vibration piece b1 to generate vibration, and because the turbulence lugs b2 on the two sides of the vibration piece b1 are mutually staggered, the airflow on the two sides of the vibration piece b1 can generate pressure on the turbulence lug b2 in a staggered manner, so that the vibration of the vibration piece b1 is intensified, the frequency and amplitude of the vibration of the tail end foot b4 at the tail end are accelerated, the effect of utilizing aerodynamic force to react on the airflow to increase the entropy value of the airflow is realized, when the dust collector 1 stops, the gushed air enters the straight pipe 321 after being disturbed by the dust collector head 31, the vibration piece b1 and the tail end foot b4 continuously vibrate under the inertia effect of the vibration, the same effect of the turbulence generator 313 on the air flow is achieved, avoiding the occurrence of condensation.
The present invention has been described in general terms in the foregoing, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the present invention. Therefore, modifications or improvements are within the scope of the invention without departing from the spirit of the inventive concept.

Claims (7)

1. The utility model provides a domestic high-efficient sofa dust catcher, includes dust catcher (1), its characterized in that: the suction port end of the dust collector (1) is communicated with a dust collection head (3) through a communication pipe (2), the dust collection head (3) comprises a dust collection head (31) and a connecting pipe (32), and the dust collection head (31) is communicated with the connecting pipe (32).
2. The high-efficiency household sofa dust collector as claimed in claim 1, wherein: the dust collection head (31) comprises a suction nozzle head (311), the inlet end of the suction nozzle head (311) is flat, the gap of the inlet end is of a Venturi structure, and the inner wall of the suction nozzle head (311) is connected with a spoiler (313) through a connecting seat (312).
3. The high-efficiency household sofa dust collector as claimed in claim 2, wherein: the spoiler (313) comprises a spoiler (a1), a single-piece raised head (a2) is arranged on one end side wall of the spoiler (a1), the cross section of the single-piece raised head (a2) is a right-angled triangle, the small acute angle of the triangle is aligned with the end of the spoiler (a1), two diversion cusps (a3) are arranged on the end of the spoiler (a1), the flow guide pointed end (a3) is connected with the side edge of the single-chip raised head (a2), one end of the spoiler (a1) far away from the single-chip raised head (a2) is provided with a vibrating foot (a5), the inner parts of the two side surfaces of the vibrating foot (a5) are respectively provided with an isosceles triangle single-side diversion trench (a6), a flow guide lug (a4) is arranged on the spoiler (a1) corresponding to the bottom edge of the single-sided flow guide groove (a6), the spoiler (a1) between the flow guide lug (a4) and the single lug boss (a2) is fixedly connected with the connecting seat (312).
4. The high-efficiency household sofa dust collector as claimed in claim 1, wherein: the connecting pipe (32) comprises a straight pipe (321), one end of the straight pipe (321) is provided with a connector (322) connected with the communicating pipe (2), one end, far away from the connector (322), of the straight pipe (321) is in threaded connection with the suction nozzle head (311), and a vibrator (323) is fixed inside the straight pipe (321).
5. The high-efficiency household sofa dust collector as claimed in claim 4, wherein: vibrator (323) is including trembler (b1), all be fixed with vortex lug (b2) on the both sides face of trembler (b1), vortex lug (b2) the crisscross setting each other of trembler (b1) both sides, all be equipped with side water conservancy diversion piece (b3) on the both sides of vortex lug (b2), one of trembler (b1) is served and is equipped with two terminal feet (b4), fixed connection between the one end of terminal foot (b4) and the inner wall of straight tube (321) is kept away from in trembler (b 1).
6. The high-efficiency household sofa dust collector as claimed in claim 3, wherein: each guide lug (a4) comprises two straight plates, the two straight plates are obliquely arranged, and the small opening of each guide lug (a4) faces to the single-side guide groove (a 6).
7. The high-efficiency household sofa dust collector as claimed in claim 3, wherein: the bottom edge of the single-side guide groove (a6) is flush with the side surface of the spoiler (a1), and the depth of the sharp-angle tip of the single-side guide groove (a6) is one third of the thickness of the vibrating foot (a 5).
CN202110067020.0A 2021-01-19 2021-01-19 Household high-efficiency sofa dust collector Pending CN112890671A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110067020.0A CN112890671A (en) 2021-01-19 2021-01-19 Household high-efficiency sofa dust collector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110067020.0A CN112890671A (en) 2021-01-19 2021-01-19 Household high-efficiency sofa dust collector

Publications (1)

Publication Number Publication Date
CN112890671A true CN112890671A (en) 2021-06-04

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ID=76115297

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Application Number Title Priority Date Filing Date
CN202110067020.0A Pending CN112890671A (en) 2021-01-19 2021-01-19 Household high-efficiency sofa dust collector

Country Status (1)

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CN (1) CN112890671A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103976690A (en) * 2014-05-23 2014-08-13 莆田学院 Dust collection device
CN104869881A (en) * 2012-12-20 2015-08-26 皇家飞利浦有限公司 Cleaning device for cleaning a surface
CN206910285U (en) * 2017-02-23 2018-01-23 江苏美的清洁电器股份有限公司 Dust catcher
CN207837468U (en) * 2017-06-19 2018-09-11 合肥易亓晟科技有限公司 A kind of dust catcher convenient for disinfection
CN210541366U (en) * 2019-06-26 2020-05-19 尚科宁家(中国)科技有限公司 Secondary dust collection sweeping robot
CN212089414U (en) * 2020-04-28 2020-12-08 邵阳学院 Dust extraction for machinery

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104869881A (en) * 2012-12-20 2015-08-26 皇家飞利浦有限公司 Cleaning device for cleaning a surface
CN103976690A (en) * 2014-05-23 2014-08-13 莆田学院 Dust collection device
CN206910285U (en) * 2017-02-23 2018-01-23 江苏美的清洁电器股份有限公司 Dust catcher
CN207837468U (en) * 2017-06-19 2018-09-11 合肥易亓晟科技有限公司 A kind of dust catcher convenient for disinfection
CN210541366U (en) * 2019-06-26 2020-05-19 尚科宁家(中国)科技有限公司 Secondary dust collection sweeping robot
CN212089414U (en) * 2020-04-28 2020-12-08 邵阳学院 Dust extraction for machinery

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