US20070056139A1 - Vacuum cleaner having brush motor using deceleration rate - Google Patents

Vacuum cleaner having brush motor using deceleration rate Download PDF

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Publication number
US20070056139A1
US20070056139A1 US11/362,144 US36214406A US2007056139A1 US 20070056139 A1 US20070056139 A1 US 20070056139A1 US 36214406 A US36214406 A US 36214406A US 2007056139 A1 US2007056139 A1 US 2007056139A1
Authority
US
United States
Prior art keywords
motor
gear
impeller
pulley
vacuum cleaner
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.)
Abandoned
Application number
US11/362,144
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English (en)
Inventor
Myung-Won Lee
Jae-sun You
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.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Gwangju Electronics Co Ltd
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 Samsung Gwangju Electronics Co Ltd filed Critical Samsung Gwangju Electronics Co Ltd
Assigned to SAMSUNG GWANGJU ELECTRONICS CO., LTD. reassignment SAMSUNG GWANGJU ELECTRONICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEE, MYUNG-WON, YOU, JAE-SUN
Publication of US20070056139A1 publication Critical patent/US20070056139A1/en
Abandoned 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
    • 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
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • 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
    • A47L9/22—Mountings for motor fan assemblies
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears

Definitions

  • the present invention relates to a vacuum cleaner with a brush motor. More particularly, the invention relates to a vacuum cleaner with a brush motor using a deceleration rate, which can produce improved suction force by stabilizing the motor by setting the rotation speed of the impeller higher than that of the motor and rotating an impeller at a high speed.
  • a vacuum cleaner uses a brush motor to generate suction force.
  • the brush motor 1 generates rotation force in an armature 4 and rotates an impeller 5 connected to a driving shaft 3 to suck dirt and air when electrical power is applied to the vacuum cleaner.
  • Dirt and air are collected in the vacuum cleaner by the vacuum pressure created between a suction body (not shown) of the vacuum cleaner and a surface to be cleaned.
  • the air filtered by a filter is discharged outside the vacuum cleaner after circulating successively inside a housing 9 , namely, through the impeller 5 , a diffuser 6 , a coil 7 , and an exhaust hole 9 a.
  • the efficiency of a vacuum cleaner is generally measured by vacuum pressure, namely, the suction force generated by the motor 1 .
  • Suction force is a very important element of a vacuum cleaner.
  • Many vacuum cleaner manufacturers seek to improve the suction force of a vacuum cleaner.
  • the basic method used to improve the suction force of a vacuum cleaner is to increase the rotation speed of the motor, although there are slight differences according to types of motors and structures of impellers.
  • the overall vacuum pressure of a vacuum cleaner can be increased by adjusting the outer diameter D of the impeller 5 or the height H of the discharge unit 6 of the impeller 5 , in addition to increasing the rotation speed of the motor 1 .
  • M 1 denotes the range in which the vacuum cleaner can deliver the maximum performance
  • M 2 indicates the range in which the cleaner motor can achieve the maximum performance
  • both the high suction cleaner motor and the conventional cleaner motor provide greater flux and suction force in M 2 than in M 1 .
  • the pressure loss generated by the rotating impeller 5 becomes greater in M 2 as the flux amount increases, which lessens the effect of suction force (or vacuum efficiency) relatively more in M 2 than in M 1 .
  • the suction force can be improved by reducing the pressure loss.
  • it is useful to increase the rotation speed of the impeller 5 and at the same time decrease the flux amount Q by reducing the diameter of the impeller 5 .
  • FIG. 3 illustrates a graph of the performance of the high suction cleaner motor that satisfies the above conditions.
  • the high suction cleaner motor As compared with the conventional cleaner motor, the high suction cleaner motor generates less pressure loss due to a decrease in the load applied to the small-sized impeller 5 . However, this causes the rotation speed of the motor to increase.
  • the impeller 5 rotates at a higher speed than the preset speed.
  • commutation becomes unstable. This can cause an increase in the number of sparks generated between a commutator 2 and a carbon brush 8 , and may eventually damage the motor.
  • the life span of the vacuum cleaner largely depends on the life span of the motor. Generally, the reduced life span of the motor leads to a shorter life span of the vacuum cleaner.
  • a brush device used for a vacuum cleaner motor is replaced by an electric circuit.
  • the motor with an electric circuit such as a BLDC (Brushless DC) motor or a single-phase SR (Switched Reluctance) motor, provides high speed rotation and strong suction force without overburdening the motor.
  • the BLDC motor or the single-phase SR motor can rotate at a high speed of 40,000 RPM or more. Since the BLDC motor or the single-phase SR motor does not have a brush, the motor is immune to damage, such as the damage caused by sparks during high speed rotation. Accordingly, the motor becomes more stable, and the life span of the vacuum cleaner can be extended.
  • the BLDC motor or the single-phase SR motor is not used widely for vacuum cleaners due to its high price.
  • the high price of the motor in turn leads to a high price of the vacuum cleaner, and the high price of the vacuum cleaner lowers its price competitiveness.
  • a non-limiting aspect of the invention provides a vacuum cleaner, including: a main body; a suction brush configured to draw particulates into the main body; a motor installed at the main body; and a deceleration unit configured to connect a driving shaft of the motor with an impeller to transfer a rotation force of the driving shaft to the impeller and to set a rotation speed of the driving shaft lower than that of the impeller.
  • a deceleration unit for a vacuum cleaner including: a first gear adapted to be connected to a first end of a driving shaft of a motor; a second gear having a smaller diameter than the first gear and configured to engage the first gear; a rotation shaft configured to be connected to an impeller, wherein the second gear is adapted to be connected to a center of the rotation shaft.
  • a deceleration unit for a vacuum cleaner including: a first pulley; a second pulley; a driving belt configured to connect the first pulley to the second pulley to transfer a driving force from the first pulley to the second pulley; and a rotation shaft configured to be connected to the second pulley and to an impeller.
  • the invention also provides a vacuum cleaner, including: at least one motor including at least one driving shaft; at least one impeller; and means for setting a rotation speed of the at least one shaft lower than a rotation speed of the at least one impeller.
  • Another object of the present invention is to provide a vacuum cleaner that is competitive in terms of price by employing a low-priced brush motor that uses a deceleration rate.
  • FIG. 1 is a perspective view that illustrates a brush motor of a conventional vacuum cleaner.
  • FIG. 2 is a side view that illustrates an impeller of FIG. 1 .
  • FIG. 3 is a graph that shows the vacuum efficiencies of a conventional cleaner motor and a high suction cleaner motor used in the conventional vacuum cleaner.
  • FIG. 4 illustrates a vacuum cleaner with a brush motor using a deceleration rate in accordance with a first non-limiting embodiment of the present invention.
  • FIG. 5 illustrates the brush motor of the vacuum cleaner using the deceleration rate in accordance with the first non-limiting embodiment of the present invention.
  • FIG. 6 illustrates a brush motor of a vacuum cleaner using a deceleration rate in accordance with a second non-limiting embodiment of the present invention.
  • FIG. 4 is a schematic perspective view of a non-limiting example of a vacuum cleaner with a brush motor using a deceleration rate in accordance with the first embodiment.
  • FIG. 5 is a schematic cross-sectional view that illustrates a non-limiting example the brush motor of the vacuum cleaner using the deceleration rate.
  • the vacuum cleaner with the brush motor using the deceleration rate may include a cleaner main body 20 , a flexible hose 30 , a suction brush 40 , and a motor 50 positioned at the main body 20 .
  • the vacuum cleaner may include a decelerating unit 60 that connects a driving shaft 53 of the motor 50 with an impeller 58 to transfer the rotation force of the driving shaft 53 to the impeller 58 and to set the rotation speed of the driving shaft 53 lower than that of the impeller 58 .
  • FIG. 4 in this embodiment illustrates one type of vacuum cleaner, the present invention can be applied to all types of vacuum cleaners including upright vacuum cleaners and canister vacuum cleaners.
  • the decelerating unit 60 may include a first gear 61 that may be connected to one end of the driving shaft 53 , and a second gear 63 configured to engage with the first gear 61 and which may have a smaller diameter than the first gear 61 .
  • the first and second gears 61 and 63 can be spur gears or helical gears, as non-limiting examples.
  • the diameter of the first gear 61 may be larger than that of the second gear 63 . This allows the motor 50 to rotate at a lower speed and the impeller 58 to rotate at a higher speed relative to each other.
  • the rotation speeds of the motor 50 and the impeller 58 may be determined by the decelerating rate set between the first and second gears 61 and 63 .
  • the second gear 63 rotates at 40,000 RPM, and the impeller 58 subsequently rotates at double the speed of the motor.
  • the motor 50 may rotate at a lower speed than a conventional motor, which can prevent sparks generated between commutator 52 c and carbon brush 52 d . As a result, the motor 50 is less susceptible to damage caused by sparks or high temperature.
  • the outer diameter D and the height H of the discharge unit 58 a of impeller 58 in motor 50 are set smaller than those of the impeller used in a conventional vacuum motor (in view of high speed rotation) to reduce the load of the impeller 58 while maintaining the rotation speed of the motor 50 .
  • the increased pressure may be produced by the increased rotation speed of impeller 58 and reduced size of the impeller 58 .
  • the second gear 63 may be connected to a rotation shaft 65 that passes through the center of the second gear.
  • the impeller 58 may connected to one end of the rotation shaft 65 with a fastener, such as nut 59 .
  • the driving shaft 53 and the rotation shaft 65 may be rotatably supported on a support panel 55 which may be mounted inside housing 50 a with fasteners, such as fixing bolts 56 a and 56 b .
  • bearings 51 b and 51 c may be installed between the driving shaft 53 and the support panel 55 , a well as between rotation shaft 65 and support panel 55 , respectively.
  • the other end of the driving shaft 53 may be rotatably supported by bearing 51 a which may be installed inside housing 50 a.
  • an impeller cover 54 configured to cover the impeller 58 may have an air inflow hole 54 a to guide the air into the housing 50 a and may be connected to the lower portion of the housing 50 a .
  • reference numerals 52 a and 52 b denote an armature and a coil, respectively.
  • the vacuum cleaner in accordance with the first non-limiting embodiment of the present invention will now be explained in detail focusing on the operation of the motor with the decelerating unit.
  • the vacuum cleaner When power is supplied to the vacuum cleaner, as shown in FIG. 5 , it generates rotation force in the armature 52 a and causes the driving shaft 53 to rotate.
  • the first gear 61 connected to the driving shaft 53 rotates, and the second gear 63 , engaged with the first gear 61 , rotates around the rotation shaft 65 .
  • the rotation force of the driving shaft 53 may be transferred successively to the first gear 61 , to the second gear 63 , to the rotation shaft 65 and finally to the impeller 58 .
  • the diameter of the first gear 61 may be larger than that of the second gear 63 . This allows the motor 50 to rotate at a lower speed and the impeller 58 to rotate at a higher speed relative to each other.
  • the rotation speeds of the motor 50 and the impeller 58 may be determined by the decelerating rate set between the first and second gears 61 and 63 .
  • the motor 50 may rotate at a low rotation speed, it can prevent sparks from generating between the commutator 52 c and the carbon brush 52 d . Also, cleaning efficiency can be maximized due to increased vacuum pressure between the suction brush 40 of the vacuum cleaner and the surface to be cleaned. This pressure may be achieved without overburdening the motor by setting the outer diameter D and the height H of the discharge unit 58 a of the impeller 58 in the motor 50 smaller than those of the impeller used in a conventional vacuum motor.
  • FIG. 6 is a schematic cross-sectional view that illustrates a brush motor using a deceleration rate of a vacuum cleaner in accordance with a second non-limiting embodiment of the present invention.
  • the overall configuration of the motor 150 in the second embodiment may be the same or similar to that of the motor 50 in the first non-limiting embodiment.
  • a decelerating unit 160 may be used to accelerate impeller 158 .
  • the decelerating unit 160 may include a first pulley 161 that may be connected to one end of a driving shaft 153 of the motor 150 , a second pulley 163 that may have center connected to a rotation shaft 165 passing through the second pulley 163 .
  • the second pulley may have a smaller diameter than the first pulley 161 .
  • the decelerating until may further include driving belt 167 configured to connect the first and second pulleys 161 and 163 to transfer the rotation force of the first pulley 161 to the second pulley 163 .
  • the diameter of the first pulley 161 may be larger than that of the second pulley 163 , which causes the impeller 158 to rotate at a higher speed as in the first embodiment. Setting the rotation speed of the motor 150 lower than that of the impeller 158 protects the motor 150 from overworking and as a result, prevents the life span of the motor 150 from being shortened.
  • the size of the impeller 158 may be set smaller than that of the impeller of a conventional cleaner motor. This reduces the flux amount of air sucked into the motor 150 and increases overall vacuum pressure in the vacuum cleaner.
  • the application of the decelerating unit used in the first and second embodiments of the present invention is not restricted to a brush motor but can be applied to a BLDC motor or a single phase SR motor, as other non-limiting examples.
  • Other motors known to hose of skill in the art are also within the scope of the present invention.
  • the life span of the motor can be extended over time, since the rotation speed of the motor may be lowered while the impeller rotates at a high speed.
  • the vacuum cleaner may use an economical brush motor using the deceleration rate that can stabilize the motor by lowering the rotation speed of the motor while simultaneously improving the suction force, instead of a high-priced BLDC motor or single phase SR motor.
  • the vacuum cleaner can achieve high price competitiveness due to low manufacturing cost while having a longer life span.
  • an increase in the size of the vacuum cleaner with the addition of the decelerating unit can be offset by minimizing the size of the impeller.
  • the vacuum cleaner can be built in compact size and have high commercial value.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Electric Suction Cleaners (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US11/362,144 2005-09-09 2006-02-27 Vacuum cleaner having brush motor using deceleration rate Abandoned US20070056139A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020050084139A KR100645380B1 (ko) 2005-09-09 2005-09-09 감속비를 이용하는 브러시 모터를 구비한 진공청소기
KR2005-84139 2005-09-09

Publications (1)

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US20070056139A1 true US20070056139A1 (en) 2007-03-15

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US11/362,144 Abandoned US20070056139A1 (en) 2005-09-09 2006-02-27 Vacuum cleaner having brush motor using deceleration rate

Country Status (6)

Country Link
US (1) US20070056139A1 (fr)
EP (1) EP1762166A3 (fr)
JP (1) JP2007077979A (fr)
KR (1) KR100645380B1 (fr)
AU (1) AU2006201003B2 (fr)
RU (1) RU2006108415A (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100083457A1 (en) * 2008-10-06 2010-04-08 Shop Vac Corporation Vacuum Assembly for Automobile
US20100251510A1 (en) * 2009-04-04 2010-10-07 Dyson Technology Limited Constant-power electric system
US20100251512A1 (en) * 2009-04-04 2010-10-07 Dyson Technology Limited Control of an electric machine
US20100253263A1 (en) * 2009-04-04 2010-10-07 Dyson Technology Limited Control of an electric machine
US20100251511A1 (en) * 2009-04-04 2010-10-07 Dyson Technology Limited Control of a permanent-magnet motor
US20100253257A1 (en) * 2009-04-04 2010-10-07 Dyson Technology Limited Control of an electric machine
US20100253274A1 (en) * 2009-04-04 2010-10-07 Dyson Technology Limited Power tuning an electric system
US20100251509A1 (en) * 2009-04-04 2010-10-07 Dyson Technology Limited High-speed electric system
US20140056740A1 (en) * 2012-08-22 2014-02-27 Samsung Electro-Mechanics Co., Ltd. Switched reluctance motor assembly
US20150020391A1 (en) * 2013-07-22 2015-01-22 Makita Corporation Power Tool with High-Speed Electric Motor
EP2679828A3 (fr) * 2012-06-29 2017-08-16 BSH Hausgeräte GmbH Ventilateur d'aspirateur et aspirateur doté d'un ventilateur d'aspirateur
US9742319B2 (en) 2009-04-04 2017-08-22 Dyson Technology Limited Current controller for an electric machine
US9926440B2 (en) 2013-11-21 2018-03-27 Arizona Chemical Company, Llc Additives for rubber compositions
US9935523B2 (en) 2014-03-18 2018-04-03 Mitsubishi Electric Corporation Mechanical device
US20210386258A1 (en) * 2020-03-18 2021-12-16 Omachron Intellectual Property Inc. Surface cleaning apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5817970B2 (ja) * 2011-06-15 2015-11-18 日立工機株式会社 集塵機

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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100083457A1 (en) * 2008-10-06 2010-04-08 Shop Vac Corporation Vacuum Assembly for Automobile
US10618502B2 (en) 2008-10-06 2020-04-14 Shop Vac Corporation Vacuum assembly for automobile
US8615845B2 (en) * 2008-10-06 2013-12-31 Shop Vac Corporation Vacuum assembly for automobile
US20100253274A1 (en) * 2009-04-04 2010-10-07 Dyson Technology Limited Power tuning an electric system
US8710778B2 (en) 2009-04-04 2014-04-29 Dyson Technology Limited Control of an electric machine
US20100253257A1 (en) * 2009-04-04 2010-10-07 Dyson Technology Limited Control of an electric machine
US20100253263A1 (en) * 2009-04-04 2010-10-07 Dyson Technology Limited Control of an electric machine
US20100251509A1 (en) * 2009-04-04 2010-10-07 Dyson Technology Limited High-speed electric system
US8432114B2 (en) * 2009-04-04 2013-04-30 Dyson Technology Limited High-speed electric system
US8474095B2 (en) 2009-04-04 2013-07-02 Dyson Tehcnology Limited Constant-power electric system
US8561253B2 (en) 2009-04-04 2013-10-22 Dyson Technology Limited Control of an electric machine
US8604729B2 (en) 2009-04-04 2013-12-10 Dyson Technology Limited Control of a permanent-magnet motor
US20100251512A1 (en) * 2009-04-04 2010-10-07 Dyson Technology Limited Control of an electric machine
US20100251510A1 (en) * 2009-04-04 2010-10-07 Dyson Technology Limited Constant-power electric system
US20100251511A1 (en) * 2009-04-04 2010-10-07 Dyson Technology Limited Control of a permanent-magnet motor
US8736200B2 (en) 2009-04-04 2014-05-27 Dyson Technology Limited Power tuning an electric system
US9742319B2 (en) 2009-04-04 2017-08-22 Dyson Technology Limited Current controller for an electric machine
US9742318B2 (en) 2009-04-04 2017-08-22 Dyson Technology Limited Control of an electric machine
EP2679828A3 (fr) * 2012-06-29 2017-08-16 BSH Hausgeräte GmbH Ventilateur d'aspirateur et aspirateur doté d'un ventilateur d'aspirateur
US20140056740A1 (en) * 2012-08-22 2014-02-27 Samsung Electro-Mechanics Co., Ltd. Switched reluctance motor assembly
US9364906B2 (en) * 2013-07-22 2016-06-14 Makita Corporation Power tool with high-speed electric motor
US20150020391A1 (en) * 2013-07-22 2015-01-22 Makita Corporation Power Tool with High-Speed Electric Motor
US9926440B2 (en) 2013-11-21 2018-03-27 Arizona Chemical Company, Llc Additives for rubber compositions
US9935523B2 (en) 2014-03-18 2018-04-03 Mitsubishi Electric Corporation Mechanical device
US20210386258A1 (en) * 2020-03-18 2021-12-16 Omachron Intellectual Property Inc. Surface cleaning apparatus

Also Published As

Publication number Publication date
KR100645380B1 (ko) 2006-11-14
AU2006201003B2 (en) 2007-11-15
EP1762166A3 (fr) 2008-01-02
EP1762166A2 (fr) 2007-03-14
JP2007077979A (ja) 2007-03-29
AU2006201003A1 (en) 2007-03-29
RU2006108415A (ru) 2007-10-20

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AS Assignment

Owner name: SAMSUNG GWANGJU ELECTRONICS CO., LTD., KOREA, REPU

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LEE, MYUNG-WON;YOU, JAE-SUN;REEL/FRAME:017627/0623

Effective date: 20060220

STCB Information on status: application discontinuation

Free format text: EXPRESSLY ABANDONED -- DURING EXAMINATION