EP3076025A1 - Unité d'aspiration sous vide - Google Patents

Unité d'aspiration sous vide Download PDF

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Publication number
EP3076025A1
EP3076025A1 EP16161896.2A EP16161896A EP3076025A1 EP 3076025 A1 EP3076025 A1 EP 3076025A1 EP 16161896 A EP16161896 A EP 16161896A EP 3076025 A1 EP3076025 A1 EP 3076025A1
Authority
EP
European Patent Office
Prior art keywords
guide
vacuum suction
suction unit
air
guide vane
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.)
Granted
Application number
EP16161896.2A
Other languages
German (de)
English (en)
Other versions
EP3076025B1 (fr
Inventor
Jeongho Lee
Changgun LEE
Sangchul Lee
Taekyung Kim
Younggyu Jung
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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
Priority claimed from KR1020150045951A external-priority patent/KR102387931B1/ko
Priority claimed from KR1020150048234A external-priority patent/KR20160119499A/ko
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP3076025A1 publication Critical patent/EP3076025A1/fr
Application granted granted Critical
Publication of EP3076025B1 publication Critical patent/EP3076025B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F04D29/444—Bladed diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/053—Shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps

Definitions

  • a vacuum suction unit may be generally included in an electric cleaner and used to suction in air including dust.
  • Korean Patent Publication No. 2013-0091841 (August 20, 2013 ) which is a prior document discloses a vacuum suction unit.
  • the vacuum suction unit includes a motor, an impeller connected to a motor by a rotating shaft and suctioning in air by rotating, a guide member adjacently disposed to the impeller and guiding air ejected by the impeller, and a cover which covers the impeller and the guide member.
  • the guide member includes a body portion disposed below the impeller and a guide vane which is formed on a side of the body portion and guides the air ejected by the impeller.
  • An air flow path through which air flows is formed between the cover and the body portion. The air which flows into inside the cover due to the impeller passes through the air flow path and moves toward the guide vane.
  • the vacuum suction unit of the prior document has a large flow loss during a process in which the air ejected by the impeller is guided by the guide vane.
  • a vortex may occur during a process in which the air which flows in due to the impeller flows through the air flow path, thereby generating a flow loss.
  • An aspect of the present invention provides a vacuum suction unit which minimizes a flow loss by optimizing an inlet angle of a guide vane and an angle of inclination of a flow guide.
  • Another aspect of the present invention provides a vacuum suction unit which reduces a flow loss by optimizing a shape of an air flow path.
  • a vacuum suction unit includes a cover which includes an air inlet, an impeller for moving air which flows in through the air inlet, a motor which includes a stator and a shaft which is connected to the impeller and rotates with respect to the stator, a guide device which includes a guide body disposed below the impeller and a guide vane provided at the guide body to guide air ejected from an outlet of the impeller, a flow guide which is disposed below the guide device and guides the air guided by the guide device toward the stator, and a motor housing which accommodates the motor and includes an air outlet.
  • the guide vane includes a first guide vane which is provided on a side of the guide body and guides the air ejected from the impeller, and an inlet angle of the first guide vane is within a range from 10 to 25 degrees.
  • the guide vane may further comprise a second guide vane which is provided at a bottom surface of the guide body, is connected to the first guide vane, and guides the air guided by the first guide vane.
  • the guide surface may be formed rounded toward the shaft.
  • An angle of inclination of the guide surface may be from 10 to 30 degrees.
  • An inner circumferential surface of the cover may be formed in a shape which inclines at a certain angle with respect to a top surface of the guide body.
  • a first flow path may be formed between an inner circumferential surface of the cover and the guide body, and the first flow path becomes narrower as getting from the outlet of the impeller closer to a top end portion of the guide vane.
  • the vacuum suction unit may further comprise a motor bracket disposed below the guide device and coupled with the cover, wherein a second flow path connected to the first flow path is formed between an inner circumferential surface of the motor bracket and the guide body.
  • the cover may comprise a first coupling portion coupled with the motor bracket, and the motor bracket comprises a bracket body for forming the second flow path and a second coupling portion provided outside the bracket body and connected with the first coupling portion.
  • a bottom surface of the first coupling portion may be located lower than the top end portion of the guide vane.
  • the flow guide may be detachably coupled with the motor bracket, and the flow guide comprises a coupling portion connected to the motor bracket.
  • FIG. 1 is a front view of a vacuum suction unit according to one embodiment of the present invention.
  • FIG. 2 is an exploded perspective view of the vacuum suction unit of FIG. 1 .
  • FIG. 3 is a longitudinal cross-sectional view of the vacuum suction unit of FIG. 1 .
  • a vacuum suction unit 1 may include a cover 10 which includes an air inlet 102 and a motor housing 60 which includes one or more air outlets 602.
  • the cover 10 may guide air which flows in through the air inlet 102 toward an impeller 20. Also, the cover 10 may maintain a vacuum pressure by insulating inner space from outside air pressure.
  • the vacuum suction unit 1 further includes the impeller 20 accommodated in the cover 10.
  • the impeller 20 increases static pressure energy and dynamic pressure energy of the air which flows in through the air inlet 102. Accordingly, a flow rate of the air may be increased by the impeller 20.
  • the impeller 20, for example, may include a hub 210 and a plurality of impeller blades 212 arranged in the hub 210.
  • Each of the impeller blades 212 may extend from a top end 213a to a bottom end 213b and may be formed in a three-dimensional shape. The air which flows may be moved to spaces between each of the adjacent impeller blades 212. Accordingly, spaces between the bottom ends 213b of the plurality of impeller blades 212 may be referred to as impeller outlets 214.
  • the air which flows in through the air inlet 102 may flow in through a top end of each of the impeller blades 212 and may be radially guided toward the bottom end 213b of each of the impeller blades 212.
  • the vacuum suction unit 1 may further include a guide device 30 which guides a flow of the air discharged through the impeller outlet 214.
  • the guide device 30 converts the dynamic pressure energy of the energy components of the air discharged through the impeller outlet 214 into the static pressure energy. That is, the guide device 30 may increase static pressure energy by reducing a flow rate of a fluid.
  • At least a part of the guide device 30 may be located in the cover 10, and the impeller 20 may be located above the guide device 30.
  • the guide device 30 may include a guide body 310 and a plurality of guide vanes 330 arranged around the guide body 310.
  • the guide body 310 may be formed in a cylindrical shape, and the plurality of guide vanes 330 may be arranged along a circumferential direction of the guide body 310 with each spaced apart.
  • the guide vanes 330 may include a first guide vane 331 provided on a side of the guide body 310 and a second guide vane 332 which extends from the first guide vane 331 and is provided at a bottom surface of the guide body 310.
  • the first guide vane 331 may vertically extend, and the second guide vane 332 may horizontally extend.
  • the second guide vane 332 is disposed on the bottom surface of the guide body 310, thereby increasing a length over which the flow of the air is guided.
  • the first guide vane 331 may be located over a first flow path P1 and a second flow path P2 which will be described below.
  • the second guide vane 332 may be located at the second flow path P2.
  • the vacuum suction unit 1 may further include a motor bracket 40 to be coupled with the cover 10.
  • the motor bracket 40 may include a bracket body 402, a supporter 404 disposed in an inner portion of the bracket body 402, and a connection portion 406 which connects the bracket body 402 with the supporter 404.
  • the motor bracket 40 may be disposed between the cover 10 and the motor housing 60 and may be fastened to each of the cover 10 and the motor housing 60.
  • the motor bracket 40 may be fastened to a bottom of the cover 10, and the motor housing 60 may be coupled with a bottom of the motor bracket 40.
  • the cover 10 may include a first coupling portion 114 to be connected with the motor bracket 40.
  • the first coupling portion 114 as shown in the drawing, may be formed in an annular shape.
  • the motor bracket 40 may include a second coupling portion 410 to be connected with the first coupling portion 114.
  • the second coupling portion 410 may be provided outside the bracket body 402.
  • a bottom surface of the first coupling portion 114 is in contact with a top surface of the second coupling portion 410.
  • a plane which is formed by connecting points where the bottom surface of the first coupling portion 114 meets the top surface of the second coupling portion 410 is referred to as a parting line PL. Since the parting line PL is a place where the cover 10 and the motor bracket 40 are connected and an air leak may occur, the bottom surface of the first coupling portion 114 and the top surface of the second coupling portion 410 are formed in shapes corresponding to each other.
  • One part of the motor bracket 40 may be located on sides of the plurality of guide vanes 330, and another part thereof may be located below the plurality of guide vanes 330.
  • the parting line PL is disposed lower than top end portions 334 of each of the guide vanes 330.
  • the air which flows through the first flow path P1 arrives at inlets of the plurality of guide vanes 330 and is guided before arriving at the parting line PL.
  • a position of the parting line PL is disposed below the inlets 314 of the plurality of guide vanes 330 as described above, thereby reducing a flow loss of the air.
  • the supporter 404 may support the guide device 30.
  • the guide body 310 may be mounted on the supporter 404. A part of the supporter 404 may be accommodated in the guide body 310.
  • the supporter 404 may be located higher than a bottom surface of the second guide vane 332.
  • an outer side of the guide body 310 may be spaced apart from an inner side of the cover 10. Accordingly, the first flow path P1 for allowing the air to flow may be formed between the outer side of the guide body 310 and the inner side of the cover 10.
  • the outer side of the guide body 310 may be spaced apart from the bracket body 402. Accordingly, the second flow path P2 for allowing the air to flow may be formed between the outer side of the guide body 310 and the bracket body 402.
  • the second flow path P2 is connected with the first flow path P1.
  • a boundary between the first flow path P1 and the second flow path P2 corresponds to a virtual plane formed by connecting points where the bracket body 402 and the cover 10 meet.
  • At least a part of the guide body 310 may be disposed between the supporter 404 and the bracket body 402 while mounted on the supporter 404. That is, at least a part of the guide device 30 may be accommodated in the motor bracket 40.
  • the guide body 310 may further include a rim portion 316 provided on an outer circumference.
  • the rim portion 316 may be provided outside the impeller 20. Accordingly, the air discharged through the impeller outlet 214 of the impeller 20 flows toward a top of the rim portion 316.
  • An inner circumferential surface 110 of the cover 10 may incline with respect to a top surface portion 317 of the rim portion 316 at a predetermined angle ⁇ .
  • the predetermined angle ⁇ means an angle formed by an extension line L1 of the inner circumferential surface 110 of the cover 10 and a horizontal line HL.
  • the first flow path P1 may become narrower toward the top end portion 334 of the guide vane 330. In other words, the first flow path P1 may become narrower in a direction the air moves.
  • a shape of the inner circumferential surface 110 of the cover 10 may be streamlined as shown in the drawing. This is to minimize air resistance and to prevent a vortex of air. Accordingly, the flow loss of the air which flows through the first flow path P1 may be reduced.
  • the plurality of guide vanes 330 may be located over the first flow path P1 and the second flow path P2 and may guide the flow of air.
  • One or more of the plurality of guide vanes 330 may be in contact with the bracket body 402 while the guide body 310 is mounted on the supporter 404.
  • the vacuum suction unit 1 may further include a motor for rotating the impeller 20.
  • the motor may be accommodated in the motor housing 60. Accordingly, the motor may be located below the supporter 404.
  • the motor may include a stator 80, a rotor which rotates with respect to the stator 80, and a shaft 72 connected to the rotor 70.
  • the stator 80 may include a coil 802.
  • the rotor 70 may be located inside the stator 80.
  • the rotor 70 may include a permanent magnet.
  • One or more bearings 74 and 76 may be coupled with the shaft 72.
  • the one or more bearings 74 and 76 may include an upper bearing 74 and a lower bearing 76.
  • the upper bearing 74 may be located at an upper portion of the rotor 70, and the lower bearing 74 may be located at a lower portion of the rotor 70.
  • the upper bearing 74 may be supported by the supporter 404 of the motor bracket 40.
  • the upper bearing 74 may be accommodated in the supporter 404.
  • the upper bearing 74 may be inserted into the supporter 404 from a bottom portion of the supporter 404.
  • the motor housing 60 may support the lower bearing 76.
  • the vacuum suction unit 1 may further include a flow guide 50 which guides the air guided by the guide vane 330 toward the stator 80.
  • the flow guide 50 may be fastened to the supporter 404 of the motor bracket 40 by a first fastening member S1. Also, the guide device 30 may be fastened to the supporter 404 by a second fastening member S2.
  • At least a part of the supporter 404 may be inserted into the flow guide 50.
  • the flow guide 50 may include an opening 502 through which the connection portion 406 passes.
  • the shaft 72 may pass through the motor bracket 40 and the guide device 30 and may be coupled with the impeller 20.
  • the shaft 72 may pass through the supporter 404 and the guide body 310.
  • the motor When power is applied to the vacuum suction unit 1, the motor is driven. Then, the rotor 70 rotates from the stator 80, and the shaft 72 coupled with the rotor 70 is rotated. When the shaft 72 is rotated, the impeller 20 connected to the shaft 72 is rotated.
  • the air discharged through the impeller outlet 214 is guided by the cover 10 to flow toward the guide vane 330 of the guide device 30. After that, the air flows along the first flow path P1 and the second flow path P2 during which the guide vane 330 guides the flow of the air.
  • the flow direction of air which passes through the second flow path P2 is changed by the flow guide 50 and flows downward.
  • a part of the air which passes through the second flow path P2 may not pass through the motor and may be discharged through some of a plurality of such air outlets 602 in the motor housing 60, and another part may pass through the motor and then may be discharged through other of the plurality of air outlets 602 of the motor housing 60.
  • FIG. 4 is a view of the guide vane according to one embodiment of the present invention.
  • FIG. 5 is a graph illustrating efficiency according to an inlet angle of a guide vane.
  • an inlet angle ⁇ 1 of the guide vane 330 means an angle formed by an extension line extending in the direction of a part of the guide vane 330, where air discharged through the impeller outlet 214 makes a first contact, and the horizontal line HL.
  • the inlet angle of the guide vane 330 may be formed smaller than 90 degrees. That is, at least a part of the guide vane 330 may be disposed to incline at a certain angle based on the vertical line VL (which is an extension line extending in a direction parallel to an extension direction of a shaft).
  • fan efficiency is 66.5% or more when the inlet angle of the guide vane 330 is within a range from 10 to 27 degrees. Also, the fan efficiency is maximized to be 67% or more when the inlet angle of the guide vane 330 is 20 degrees. The fan efficiency may be reduced when the inlet angle of the guide vane 330 is less than 20 degrees or more than 20 degrees.
  • the fan efficiency drops to be 66% or less. Also in this case, it is undesirable because the guide vane 330 acts as flow resistance and increases a flow loss of the air.
  • the inlet angle of the guide vane 330 When the inlet angle of the guide vane 330 is more than 27 degrees, the fan efficiency drops to be 66% or less. In this case, the guide vane 330 is substantially incapable of guiding and then the flow loss becomes large.
  • the inlet of the guide vane 330 may be selected within the range from 10 to 27 degrees.
  • an inlet angle of a first guide vane is about 40 degrees.
  • the fan efficiency notably increases compared with the prior document.
  • a part of the second guide vane 332 may be located outside the second flow path P2. Accordingly, the air which passes through the second flow path P2 may be guided by the second guide vane 332.
  • the second guide vane 332 may increase in a vertical length as getting closer to the shaft 72.
  • an air guide area increases in the second guide vane 332 in such a way that the air may smoothly flow toward the flow guide 50.
  • At least a part of the second guide vane 332 located in the second flow path P2 may increase in a vertical length as getting closer to the shaft 72. Also, at least a part of the second guide vane 332 located outside the second flow path P2 may increase in a vertical length as getting closer to the shaft 72.
  • At least a part of the second guide vane 332 may be located at the same height as that of at least a part of a guide surface 501 of the flow guide 50.
  • At least a part of the first guide vane 331 may be disposed to incline with respect to the vertical line VL, and an inlet angle of the first guide vane 331 may be selected within a range from 10 to 27 degrees.
  • At least a part of the guide vane may be disposed to incline with respect to the vertical line VL, and, by selecting the inlet angle of the guide vane to be within the range of 10 to 27 degrees, there is an advantage of a reduced flow loss of air and increased fan efficiency.
  • FIG. 6 is a bottom view of the flow guide shown in FIG. 2 .
  • FIG. 7 is a view illustrating an angle between the flow guide and a horizontal line.
  • the flow guide 50 may include the guide surface 501 for guiding an airflow.
  • the guide surface 501 may be provided on a bottom surface of the flow guide 50, and at least a part of the flow guide 50 may be formed in a shape with a diameter which is reduced as getting closer to a bottom.
  • the guide surface 501 may be formed of a rounded or inclined shape. In detail, at least a part of the guide surface 501 may be formed in a curved shape curved toward the shaft 72 or may be formed with an incline at a certain angle with respect to the horizontal line HL.
  • An angle ⁇ 2 of the guide surface 501 may mean an angle formed by a tangent at a place of the guide surface 501 where air discharged from the guide vane 330 makes a first contact and the horizontal line HL.
  • the angle ⁇ 2 of the guide surface 501 may be smaller than 90 degrees.
  • a range of the angle ⁇ 2 of the guide surface 501 may be from about 10 to about 30 degrees.
  • fan efficiency may be increased.
  • the fan efficiency may be reduced instead as the angle ⁇ 2 of the guide surface 501 increases.
  • the fan efficiency when the angle ⁇ 2 of the guide surface 501 is 0 degrees is higher than the fan efficiency when the angle ⁇ 2 of he guide surface 501 is 30 degrees.
  • the fan efficiency when the angle ⁇ 2 of the guide surface 501 is 30 degrees is similar to the fan efficiency when the angle ⁇ 2 of he guide surface 501 is 0 degrees. That is, when the inlet angle ⁇ 1 of the guide vane 330 is 25 degrees, an effect of an angle of the guide surface 501 on fan efficiency may be slight.
  • fan efficiency may be even more increased when the guide surface 501 is formed without an incline.
  • the inlet angle ⁇ 1 of the guide vane 330 may preferably be 25 degrees or less.
  • the fan efficiency may be maximized.
  • the air guided by the guide vane 330 may be guided toward the stator 80 by the guide surface 501.
  • the flow guide 50 may prevent the air whose flow is guided by the guide vane 330 from flowing toward the shaft 72. That is, the flow guide 50 may guide the air not to flow in a horizontal direction that is perpendicular to the extension direction of the shaft 72 and to flow downward by changing a flow direction of the air.
  • the flow guide 50 may further include a coupling portion 503 provided at the guide surface 501 and coupled with the motor bracket 40.
  • the coupling portion 503 may be formed as a recess in the guide surface 501.
  • the connection portion 406 may be inserted into the coupling portion 503, and the coupling portion 503 may be formed in the same number as that of the connection portions 406.
  • the flow guide 50 may be detachably mounted on the motor bracket 40. Accordingly, it is easy to replace the flow guide 50 and easy to change an angle of inclination of the guide surface 501.
  • the angle ⁇ 2 formed by the guide surface 501 provided at the flow guide 50 and the horizontal line is within a range from 0 to 30 degrees, there is an advantage of a minimized flow loss of air and increased fan efficiency.
  • FIG. 8 is a view comparing cross-sectional views of cover shapes of the vacuum suction unit according to one embodiment of the present invention and a conventional vacuum suction unit.
  • FIG. 9 is a view illustrating airflows of each of the vacuum suction units shown in FIG. 8 .
  • FIG. 10 is a graph comparing efficiency of each of the vacuum suction units shown in FIG. 8(a) and 8(b) .
  • FIG. 8(a) is a cross-sectional view of a conventional vacuum suction unit
  • FIG. 8(b) is a cross-sectional view of the vacuum suction unit according to one embodiment of the present invention.
  • FIG. 9(a) illustrates an airflow of the conventional vacuum suction unit
  • FIG. 9(b) illustrates an airflow of the vacuum suction unit according to one embodiment of the present invention.
  • FIG. 10(a) illustrates efficiency of the conventional vacuum suction unit
  • FIG. 10(b) illustrates efficiency of the vacuum suction unit according to one embodiment of the present invention.
  • the first flow path P1 formed between the cover 10 and the guide body 310 becomes narrower as getting closer to the guide vane 330.
  • a flow path P1' formed between the cover 11 and the guide body 311 has a uniform width. That is, an inner circumferential surface of the cover 11 of the conventional vacuum suction unit 2 does not incline and extends in a horizontal direction.
  • the vacuum suction unit 1 according to one embodiment of the present invention has a fan efficiency of 65.3%, and the conventional vacuum suction unit 2 has fan efficiency of 63.0%.
  • a decrease in efficiency may be prevented by forming a streamlined shape of an inner circumferential surface of the cover 10.
  • a parting line is disposed below a top end portion of a guide vane, thereby preventing a vortex or an air leakage at a portion adjacent to the parting line.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP16161896.2A 2015-04-01 2016-03-23 Unité d'aspiration sous vide Active EP3076025B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020150045951A KR102387931B1 (ko) 2015-04-01 2015-04-01 진공 흡입 유닛
KR1020150048234A KR20160119499A (ko) 2015-04-06 2015-04-06 진공 흡입 유닛

Publications (2)

Publication Number Publication Date
EP3076025A1 true EP3076025A1 (fr) 2016-10-05
EP3076025B1 EP3076025B1 (fr) 2020-08-19

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US (2) US20160290359A1 (fr)
EP (1) EP3076025B1 (fr)

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Publication number Priority date Publication date Assignee Title
EP3376043B1 (fr) * 2017-03-16 2020-12-09 LG Electronics Inc. Ventilateur motorisé
KR102482007B1 (ko) * 2017-09-06 2022-12-28 삼성전자주식회사 모터어셈블리 및 이를 포함하는 청소기
CN208651209U (zh) * 2018-05-31 2019-03-26 江苏美的清洁电器股份有限公司 一种扫地机器人的风机组件和扫地机器人

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JPS59170495A (ja) * 1983-03-18 1984-09-26 Matsushita Electric Ind Co Ltd 電動送風機
JP2011080427A (ja) * 2009-10-08 2011-04-21 Panasonic Corp 電動送風機及びそれを用いた電気掃除機
US20120138058A1 (en) * 2009-08-11 2012-06-07 Timothy Tsun-Fai Fu Single stage, axial symmetric blower and portable ventilator
KR20130091841A (ko) 2012-02-09 2013-08-20 엘지전자 주식회사 진공 흡입 유닛 및 이를 구비하는 진공청소기

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MX2009012360A (es) * 2007-05-18 2009-12-16 Mccrometer Inc Aparato enderezador de flujo.
JP5048701B2 (ja) * 2009-03-10 2012-10-17 三菱電機株式会社 電動送風機及び電動掃除機

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Publication number Priority date Publication date Assignee Title
JPS59170495A (ja) * 1983-03-18 1984-09-26 Matsushita Electric Ind Co Ltd 電動送風機
US20120138058A1 (en) * 2009-08-11 2012-06-07 Timothy Tsun-Fai Fu Single stage, axial symmetric blower and portable ventilator
JP2011080427A (ja) * 2009-10-08 2011-04-21 Panasonic Corp 電動送風機及びそれを用いた電気掃除機
KR20130091841A (ko) 2012-02-09 2013-08-20 엘지전자 주식회사 진공 흡입 유닛 및 이를 구비하는 진공청소기

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