US20030172490A1 - Vacuum cleaner - Google Patents

Vacuum cleaner Download PDF

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Publication number
US20030172490A1
US20030172490A1 US10/384,529 US38452903A US2003172490A1 US 20030172490 A1 US20030172490 A1 US 20030172490A1 US 38452903 A US38452903 A US 38452903A US 2003172490 A1 US2003172490 A1 US 2003172490A1
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US
United States
Prior art keywords
electric blower
main body
vacuum cleaner
upper portion
base
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
US10/384,529
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English (en)
Inventor
Yoshiaki Onishi
Seizo Hayashi
Seiji Yamaguchi
Saburo Kajikawa
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. reassignment MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HAYASHI, SEIZO, KAJIKAWA, SABURO, ONISHI, YOSHIAKI, YAMAGUCHI, SEIJI
Publication of US20030172490A1 publication Critical patent/US20030172490A1/en
Abandoned legal-status Critical Current

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    • 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
    • A47L9/32—Handles
    • A47L9/327—Handles for suction cleaners with hose between nozzle and casing
    • 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
    • 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

Definitions

  • the present invention relates to a vacuum cleaner; and, more particularly, to a household vacuum cleaner with enhanced airflow and reduced noise.
  • base 1 of a main body of a vacuum cleaner there is provided base 1 of a main body of a vacuum cleaner. Included in a front region thereof is dust chamber 2 having an open top, and separated by partition 3 is housing chamber 4 in a rear region thereof incorporating a cord retracting device (not shown) and electric blower 5 for generation of suction air stream for the intake of dust. Moreover, seamlessly formed in the frontal upper end of base 1 is handle 6 . Furthermore, in order to facilitate transportability of the vacuum cleaner, there are provided swivel caster 8 on the bottom surface thereof and a pair of wheels 7 in a rear portion of respective lateral faces thereof.
  • upper unit 10 encloses the open top of housing chamber 4 incorporating electric blower 5 , in which a rear portion of upper unit 10 is latched onto latch 9 provided in base 1 , and a frontal portion thereof is screwed onto base 1 via vis.
  • lid 11 The exposed open top of dust chamber 2 is enclosed by lid 11 , rotatably installed via boss 12 attached to upper unit 10 .
  • base 1 is adjoined with upper unit 10 at conjugating member 13 .
  • a vacuum cleaner including: a main body having an electric blower for generating suction air stream and a dust chamber for storing collected dust particles therein; and a suction nozzle communicated with the dust chamber for sucking in dir-laden air, wherein the electric blower is not greater than about 20% of the main body by volume.
  • a vacuum cleaner including: a main body having a dust chamber for collecting dust therein and a housing chamber for hosting an electric blower for generating suction air stream and a power supplying member for supplying power thereto; and a suction nozzle communicated with the dust chamber for sucking in dirt-laden air, wherein the electric blower is not greater than about 30% of the dust chamber and that of the housing chamber by volume.
  • a vacuum cleaner including: a main body having a housing chamber containing therein an electric blower for generating suction air stream and a power supply member for providing power to the electric blower, a dust chamber for collecting dust therein, and an attachment storage compartment for storing therein a suction nozzle to be used in sucking in dir-laden air, wherein at least one of ratios of a width and a length of the electric blower to a width and a length of the attachment storage compartment, respectively, is not greater than about 30%.
  • FIG. 1 is a plan view of a base of a main body of a vacuum cleaner in accordance with a first preferred embodiment of the present invention
  • FIG. 2 describes a partially cutaway side elevational view of the vacuum cleaner
  • FIG. 3 shows a perspective view of the exterior of the vacuum cleaner
  • FIG. 4 offers noise characteristics of the vacuum cleaner
  • FIG. 5 is a plan view of a modification of the first preferred vacuum cleaner of the present invention.
  • FIG. 6 provides a plan view of another modification of the first preferred vacuum cleaner of the present invention.
  • FIG. 7 presents a plan view of still another modification of the first preferred vacuum cleaner of the present invention.
  • FIG. 8 depicts a side elevational view of still another modification of the first preferred vacuum cleaner of the present invention.
  • FIG. 9 represents a partially cutaway side elevational view of still another modification of the first preferred vacuum cleaner of the present invention.
  • FIG. 10 sets forth a partially cutaway side elevational view of still another modification of the first preferred vacuum cleaner
  • FIG. 11 describes a partially cutaway side elevational view of still another modification of the first preferred vacuum cleaner
  • FIG. 12 illustrates a plan view of a vacuum cleaner in accordance with a second preferred embodiment of the present invention, wherein a lid enclosing an attachment storage compartment is removed;
  • FIG. 13 offers a plan view of a vacuum cleaner after removing a lid removed in a modification of the second preferred embodiment
  • FIG. 14 provides a plan view of a vacuum cleaner after removing a lid in still another modification of the second preferred embodiment
  • FIG. 15 presents a side elevational view of a vacuum cleaner in accordance with a third preferred embodiment of the present invention.
  • FIG. 16 sets forth a plan view of a base of a vacuum cleaner of a modification of the third preferred embodiment
  • FIG. 17 depicts a side elevational view of another modification of the third preferred vacuum cleaner
  • FIG. 18 describes a side elevational view of still another modification of the third preferred vacuum cleaner
  • FIG. 19 shows a side elevational view of still another modification of the third preferred vacuum cleaner
  • FIG. 20 is a partially cutaway side elevational view of a vacuum cleaner in accordance with a fourth preferred embodiment of the present invention.
  • FIG. 21 represents a partially cutaway side elevational view of a vacuum cleaner in accordance with a fifth preferred embodiment of the present invention.
  • FIG. 22 sets forth a partially cutaway side elevational view of a vacuum cleaner in accordance with a sixth preferred embodiment of the present invention.
  • FIG. 23 illustrates a partially cutaway side elevational view of a vacuum cleaner in accordance with a seventh preferred embodiment of the present invention.
  • FIG. 24 provides a perspective view of an alternative upright vacuum cleaner in accordance with the present invention.
  • FIG. 25 offers a partially cutaway side elevational view of a conventional vacuum cleaner.
  • FIG. 26 depicts a perspective view of a base of the conventional vacuum cleaner.
  • FIG. 1 represents a plan view of a base of a main body of a vacuum cleaner
  • FIG. 2 illustrates a partially cutaway side elevational view of the main body
  • FIG. 3 depicts a perspective view of the exterior of the main body
  • FIG. 4 presents noise characteristics of the vacuum cleaner.
  • main body 21 of the vacuum cleaner (hereinafter referred to as main body) includes base 22 , upper portion 23 , and cover 24 enclosing upper portion 23 .
  • Cover 24 incorporates an attachment storage compartment (not shown), which is covered by lid 25 provided thereon. Further provided is aperture 26 to be connected with a hose (not shown) coupled to a suction nozzle (not shown) for sucking dust via an extension tube (not shown) Moreover, placed on lateral faces of main body 21 is a pair of wheels 27 . Finally enclosing an adjoining portion of base 22 and upper portion 23 is bumper 29 .
  • base 22 is provided with dust chamber 31 and housing chamber 32 divided by partition 30 .
  • Incorporated in housing chamber 32 is electric blower 33 , placed on a mounting plate (not shown) for generation of suction air stream, that is equal to or less than about 20% of main body 21 by volume, and cord retracting device 34 serving as a power supplying member.
  • Cord retracting device 34 can be replaced by a rechargeable battery pack.
  • exhaust 35 located in a rear portion of base 22 is exhaust 35 for releasing therethrough the suction air stream created by electric blower 33 .
  • Such compact electric blower 33 frees up additional space in housing chamber 32 , thereby reducing occurrences of turbulent airflow and flow resistance, enabling noise reduction.
  • electric blower 33 employed in the present invention is not greater than about 20% of the interior of main body 21 by volume. Therefore, by utilizing thus obtained freed up space in main body 21 , dust chamber 31 as well as the exhaust area can be expanded to hold bigger capacity, while maintaining the dimensions of main body 21 identical to those of a conventional vacuum cleaner. Such augmentation of the exhaust area reduces formation of turbulent airflow, thereby enabling noise reduction and providing greater convenience to the operator.
  • the electric blower being not greater than about 20% of the interior of the main body by volume, even with electric blower 33 of high power output having a maximum power output of over 1400 W, the space provided between electric blower 33 and the walls of main body 21 serving as buffer is sufficient to insulate the walls of main body 21 from the heat dissipated by electric blower 33 , thereby preventing thermal deformations in the walls of main body 21 .
  • FIG. 4 there is provided a noise characteristics view showing a relationship between a ratio of the volume of electric blower 33 to the volume of housing chamber 32 and noise level associated therewith.
  • a level the noise level
  • a microphone was placed 1 m above and 1 m away from the center of main body 21 .
  • the ratio (v 1 /V 1 ) of the volume of electric blower 33 (v 1 ) to the volume of housing chamber 32 (V 1 ) to obtain such noise level is about 35%. Accordingly, the ratio can practically be set to be not greater than about 35%. However, taking into account actual variations, the preferable ratio is not greater than about 30%.
  • FIG. 5 is a plan view of a vacuum cleaner of a modification of the first preferred embodiment, wherein the ratio (v 2 /V 2 ) of the volume of electric blower 33 (v 2 ) to the volume of dust chamber 31 (V 2 ) is not to exceed about 30%.
  • noise level was reduced below 50 dBA, which can be attributed to a formation of laminar flow pattern in the suction air stream.
  • FIG. 6 is a plan view of the vacuum cleaner of another modification of the first preferred embodiment, in which W 1 and L 1 denote the width and the length of housing chamber 32 , respectively, whereas w 1 and l 1 denote the width and the length of electric blower 33 , respectively.
  • W 1 and L 1 denote the width and the length of housing chamber 32
  • w 1 and l 1 denote the width and the length of electric blower 33 , respectively.
  • FIG. 7 is a plan view of the vacuum cleaner of still another modification of the first preferred embodiment, wherein W 2 and L 2 are the width and the length of dust chamber 31 , respectively.
  • the width w 2 of electric blower 33 is configured not to exceed about 50% of the width W 2 of dust chamber 31 .
  • Employing the aforementioned noise level measurement under such conditions reduced the noise level significantly below 50 dBA.
  • the ratio over about 50% is considered undesirable, for such ratio widens the inlet of electric blower 33 aiding formation of turbulent airflow pattern in suction air stream in dust chamber 31 , thereby suppressing formation of laminar flow, hence increasing level of noise produced thereby.
  • FIG. 8 is a side elevational view of the vacuum cleaner of still another modification of the first preferred embodiment, wherein the height h of electric blower 33 mounted in base 22 was designed not to exceed 50% of the height H of housing chamber 32 . Accordingly, greater spacing is provided between electric blower 33 and the upper surface of upper portion 23 . Therefore, the high frequency pitch produced by electric blower 33 is effectively prevented from transmitting through the upper surface of upper portion 23 , enabling noise reduction. Further, such arrangement forces the centroid to be at a lower part of the vacuum cleaner, thereby making the structure more robust against external shocks and impacts.
  • FIG. 9 is a partially cutaway side elevational view of a vacuum cleaner of still another modification of the first preferred embodiment, in which electric blower 33 is disposed on the bottom portion of base 22 . Under such arrangement, the high frequency pitch is effectively prevented from transmitting through the upper portion of main body 21 , thereby enabling noise reduction.
  • FIG. 10 is a partially cutaway side elevational view of a vacuum cleaner of still another modification of the first preferred embodiment, in which electric blower 33 is disposed above base 22 through the use of a mounting plate.
  • the suction air stream flows from upper portion 23 of main body 21 to base 22 , which in turn reduces the flow rate. Consequently, the rate of exhaust airflow from main body 21 to the ambient air is reduced, which also reduces dispersing of the dust particles during the exhaust process.
  • FIG. 11 is a partially cutaway side elevational view of a vacuum cleaner of still another modification of the first preferred embodiment, in which electric blower 33 is disposed around the middle of the upper surface of upper portion 23 and the bottom surface of base 22 . Under such arrangement, flow resistance along the walls of housing chamber 32 is reduced, and a reduced amount of vibration of electric blower 33 is distributed or transmitted through base 22 and upper portion 23 , which in turn lessens the overall vibration of main body 21 .
  • a second preferred embodiment of the present invention will now be described in detail, in which a compact lightweight electric blower is used to effectively utilize thus obtained additional space for the attachment storage compartment.
  • the basic configuration of the second preferred embodiment closely resembles that of the first preferred embodiment. Therefore, like parts in the first and the second embodiments will be designated by like numerals and a detailed description thereof will be omitted; and instead distinctive parts will be focused and elaborated.
  • FIG. 12 is a plan view of a main body after removing the lid covering the attachment storage compartment.
  • attachment storage compartment 36 in upper portion 23 of the main body.
  • Attachment storage compartment 36 holds attachments, such as crevice nozzle 37 for cleaning cracks and brush nozzle 38 for cleaning shelves.
  • the width w 3 of electric blower 33 is designed not to exceed about 30% of the width W 3 of attachment storage compartment 36 . Accordingly, such configuration of attachment storage compartment 36 placed in upper portion 23 of the main body facilitates accessing of the attachments associated therewith, since crevice nozzle 37 and brush nozzle 38 can be sufficiently spaced apart.
  • electric blower 33 can be disposed in a portion in base 22 directly corresponding to the portion between crevice nozzle 37 and brush nozzle 38 , thus providing sufficient spacing between electric blower 33 and upper portion 23 of the main body.
  • FIG. 13 is a plan view of a main body after removing the lid covering the attachment storage compartment in a modification of the second preferred embodiment, in which, there is provided attachment storage compartment 36 in upper portion 23 for holding attachments, such as, crevice nozzle 37 and brush nozzle 38 .
  • the length l 3 of electric blower 33 is configured not to exceed about 30% of the length L 3 of attachment storage compartment 36 . Accordingly, attachment storage compartment 36 disposed in upper portion 23 of the main body facilitates accessing of the attachments, since crevice nozzle 37 and brush nozzle 38 associated therewith have sufficient spacing therebetween. Furthermore, by placing crevice nozzle 37 and brush nozzle 38 close to one end of attachment storage compartment 36 (i.e.
  • a substantial region thereof can be unoccupied by the nozzles 37 and 38 .
  • electric blower 33 in a portion of a base 22 that corresponds to the unoccupied region in attachment storage compartment 36 , an ample spacing between electric blower 33 and upper portion 23 can be attained.
  • FIG. 14 is a plan view of a main body after removing a lid, exposing the attachment storage compartment 36 of still another modification of the preferred embodiment.
  • attachment storage compartment 36 in upper portion 23 of the main body for housing the attachments, such as crevice nozzle 37 , brush nozzle 38 , and floor nozzle 39 .
  • the width w 4 and the length l 4 of electric blower 33 are not configured to exceed about 30% of the width W 4 and the length L 4 of attachment storage compartment 36 , respectively.
  • attachment storage compartment 36 can be enlarged, to enable crevice nozzle 37 , brush nozzle 38 , and floor nozzle 39 to be held therein, adding greater convenience.
  • a third preferred embodiment of the present invention employing a compact lightweight electric blower at various locations in a vacuum cleaner so as to add convenience to an operator, will now be explained in detail.
  • the basic configuration of the present embodiment is substantially identical to that of the first preferred embodiment. Thus only the distinctive parts will be explained, and like parts will be assigned like reference numerals, omitting detailed explanations thereof.
  • FIG. 15 is a side elevational view of a main body of a vacuum cleaner in accordance with the third embodiment.
  • a pair of wheels 40 on the lateral faces of the main body.
  • electric blower 33 is preferably installed near the center O of wheels 40 , i.e. the axis of rotation thereof.
  • the centroid of main body 21 nearly coincides with the axis of rotation. Accordingly, such configuration of the main body facilitates operator's maneuverability of the vacuum cleaner.
  • FIG. 16 is a plan view of a base of a modification of the third preferred vacuum cleaner, in which the centroid O of electric blower 33 and cord retractable device 34 is aligned with the central axis TT of main body 21 .
  • the centroid O of electric blower 33 and cord retractable device 34 is aligned with the central axis TT of main body 21 .
  • cord retractable device 34 is placed to the rear of electric blower 33 , while a handle is located in the front region of main body 21 , cord retractable device 34 and electric blower 33 are both aligned with the central axis of main body 21 , respectively, thereby providing stability when carrying main body 21 and facilitating the transportability thereof as well.
  • such configuration further yields improved exhaust airflow from electric blower 33 to cord retractable device 34 , thereby effectively cooling the electric power cord wound in cord retractable device 34 .
  • cord retractable device 34 if disposed under electric blower 33 , offers such benefits as, increased stability as a result of lowered center of mass and reduction in rattling of wheels 40 against the floor surface due to cord retractable device 34 serving to absorb vibration generated by electric blower 33 , thereby reducing the vibration transmitted to wheels 40 .
  • FIG. 17 is a side elevational view of another modification of the preferred vacuum cleaner of the present invention, in which handle 41 is formed in the upper front end of main body 21 , and electric blower 33 is disposed in an upper portion of housing chamber 32 .
  • the centroid G of main body 21 is above line SS extending from an edge of handle 41 to center O of wheel 40 . Accordingly, under such configuration, when main body 21 is pulled by handle 41 , the centroid shifts downwards and gets closer to the operator, thereby eliminating instability while holding handle 41 and maneuvering main body 21 .
  • FIG. 18 is a side elevational view of still another modification of the preferred embodiment, in which handle 42 is pivotally installed at upper portion 23 of the main body, and disposed below the axis of rotation thereof is electric blower 33 .
  • handle 42 is pivotally installed at upper portion 23 of the main body, and disposed below the axis of rotation thereof is electric blower 33 .
  • the centroid of main body 21 is located below handle 42 while being carried by handle 42 , since electric blower 33 with a considerable mass is located directly below handle 42 . Accordingly, movement of the centroid of main body 21 is minimized, while being carried by handle 42 , thus eliminating instability in the hand and further facilitating the transportability of main body 21 .
  • FIG. 19 is a side elevational view of still another modification of the preferred vacuum cleaner, in which fixed handle 43 is provided at upper portion 23 and electric blower 33 is installed in the proximity thereof. Similar to the aforementioned example, the centroid of main body 21 is placed close to handle 43 , hence eliminating instability in the hand of the operator as a result of the minimized movement of the centroid while transporting main body 21 .
  • the configurations of vacuum cleaners employing the compact lightweight electric blower are tailored to the specification of a design in reducing noise, expanding dust chamber, and enhancing maneuverability and operability of the vacuum cleaner.
  • the electric blower is configured not to exceed about 20% of the main body by volume. That is because the ratio (v 2 /V 2 ) of the volume (v 2 ) of the electric blower 33 to the volume (V 2 ) of the dust chamber 31 and the ratio (v 1 /V 1 ) of the volume (v 1 ) of electric blower 33 to the volume (V 1 ) of housing chamber 32 are preferably not to exceed about 30% as described above. Exceeding such ratio will result in an insufficient amount of space in the main body required to obtain the desired aforementioned results with given dimensions/configurations of the conventional main body 21 .
  • main body 21 if electric blower 33 is designed not to exceed about 25% of main body 21 by weight, the vibration generated by electric blower 33 is less experienced by main body 21 , resulting in a reduced amount of vibration of main body 21 . Accordingly, the outer walls of main body 21 can be designed thinner, thereby reducing the overall weight thereof.
  • electric blower 33 with power output of greater than 1400 W under aforementioned specification i.e., not greater than 25% of the main body by weight
  • has low heat capacity hence heat transfer taking place between electric blower 33 and the outer walls of main body 21 tends to be insufficient to cause thermal deformation in the outer walls.
  • FIG. 20 A fourth preferred embodiment of the present invention will now be described with reference to FIG. 20. An explanation of parts that are identical or similar to those in the previous embodiments will be omitted, and like reference numerals and names will be used therefor.
  • the fourth preferred embodiment shown in FIG. 20 is provided with exhaust 44 in the rear portion of main body 21 for exhausting air stream generated by electric blower 33 to the outside; filter 45 disposed in front of exhaust 44 for collecting dust particles, such as carbon particles, entrained in the air stream generated by electric blower 33 ; and partition 46 for supporting filter 45 and being provided with opening 47 placed in front of filter 45 communicated therewith. Further provided is shielding wall 48 disposed between electric blower 33 and partition 46 so that electric blower 33 is not directly facing opening 47 .
  • the air stream generated by electric blower 33 encounters shielding wall 48 and is redirected and detoured toward opening 47 formed in partition 46 and is passed therethrough. Thereafter, the air stream is passed through filter 45 , at which time dust particles, such as carbon particles are trapped therein, consequently only the “clean” air stream exiting through exhaust 44 and finally released to the surrounding.
  • the noise generated by electric blower 33 which travels along with the air stream to the rear of main body 21 , is prevented from directly escaping through opening 47 as a result of the direct pathway to opening 47 being blocked by shielding wall 48 , greatly contributing to the reduction of noise.
  • Such usage of shielding wall 48 would be highly effective in case of using such high rotational speed electric blower 33 in the first to the third preferred embodiment.
  • shielding wall 48 is placed in front of partition 46 .
  • similar results can be achieved as long as shielding wall 48 is provided to block the direct pathway of the air stream to exhaust 44 even in a case where partition 46 does not exist and filter 45 is supported by means other than partition 46 .
  • FIG. 21 A fifth preferred embodiment of the present invention will now be described with reference to FIG. 21. An explanation of parts that are identical or similar to those in the previous embodiments will be omitted, and the like reference numerals and names will be used therefor.
  • the present embodiment comprehends the provision of motor cover 48 , formed into upper and lower sections 48 a , 48 b , each having a substantially semi-circular cross sectional shape, enclosing electric blower 33 ; packing 51 for hermetically sealing the front ends of motor cover 48 to partition 30 ; aperture 52 , disposed at the bottom region of lower motor cover 48 b , enabling opening 47 to be air-communicated with the interior of the motor cover.
  • a rear region of electric blower 33 is connected to a rear portion of motor cover 48 via vibration-proof material 49
  • a front region of electric blower 33 is attached to partition 30 via vibration-proof material 50 .
  • the air stream generated by electric blower 33 flows in the direction indicated by arrow A. Specifically, the air stream first flows through aperture 52 toward the bottom and is redirected in the direction normal to the initial direction toward opening 47 , and finally exits through exhaust 44 to the surrounding. Meanwhile, noise also generated by electric blower 33 , which travels through aperture 52 along with the air stream, is attenuated when redirected and also as a result of elongated travel path. Accordingly, the level of noise escaping through exhaust 44 can be significantly reduced. Such benefits can be evident from a vacuum cleaner employing high rotational speed electric blower 33 yielding high level of noise, such as those used in the first to the third preferred embodiments.
  • FIG. 22 A sixth preferred embodiment of the present invention will now be described with reference to FIG. 22. An explanation of parts that are identical or similar to those in the previous embodiments will be omitted, and like reference numerals and names will be used therefor.
  • the present embodiment is characterized by the provision of motor cover 48 defined by upper motor cover 48 a and lower motor cover 48 b each having a double layered wall structure, in which inner wall 53 of lower motor cover 48 b incorporates first aperture 52 to be communicated with electric blower 33 and outer wall 54 of upper motor cover 48 a incorporates second aperture 55 to be communicated with first aperture 52 , such that two apertures 52 , 55 are in non-facing positions.
  • the noise generated by electric blower 33 is transmitted along with the air stream through first aperture 52 located at one side of motor cover and is detoured toward second aperture 55 residing at the opposite side of motor cover 48 . And then the noise and the he air stream exit through second aperture 55 to travel toward opening 47 , thereby considerably lowering the level of noise.
  • Such benefits can be highly advantageous when a vacuum cleaner is equipped with such blower as high rotational speed electric blower 33 producing high level of noise used in the first to the third preferred embodiments.
  • a seventh preferred embodiment of the present invention will now be described with reference to FIG. 23. An explanation of parts that are identical or similar to those of the previous embodiments will be omitted, and like reference numerals and names will be used therefor.
  • the present embodiment is provided with motor cover 56 constituted by upper motor cover 56 a and lower motor cover 56 b each being of an approximate semi-circular cross sectional shape, first cavity 57 and second cavity 58 are provided.
  • motor cover 56 constituted by upper motor cover 56 a and lower motor cover 56 b each being of an approximate semi-circular cross sectional shape
  • first cavity 57 and second cavity 58 are provided.
  • seamlessly formed semi-circular walls 59 , 60 , 61 respectively having cutaway portions 59 a , 60 a , 61 a
  • seamlessly formed semi-circular walls 62 , 63 , 64 respectively having cutaway portions 62 a , 63 a , 64 a , define lower motor cover 56 b.
  • the noise generated by electric blower 33 follows the air stream through the narrowly formed cutaway portions 59 a , 62 a and into first cavity 57 where the cross sectional area is expanded, and then through the narrow cutaway portions 60 a , 63 a . Thereafter the air stream flows into second cavity 58 , where the cross sectional area is again expanded, and sequentially through the narrow cutaway portions 61 a , 64 a . Finally the air stream is exited through opening 47 to the surrounding of main body 21 .
  • Such narrowing and widening of the cross sectional area of the travel path of the air stream functions as a muffler in diminishing the noise level.
  • Such configuration may be extremely beneficial when using a high rotational speed electric blower outputting high level of noise as in the first through third preferred embodiments.
  • FIG. 24 an upright vacuum cleaner can be employed and can still benefit from the present invention.
  • main body 67 having dust chamber 73 , which is enclosed by cover 72 .
  • handle 66 having grip 65 in the upper distal end thereof.
  • Electric blower 71 is also disposed at the bottom region of main body 67 .
  • suction head 70 is pivotally attached to the bottom of main body 67 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Suction Cleaners (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US10/384,529 2002-03-12 2003-03-11 Vacuum cleaner Abandoned US20030172490A1 (en)

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JP2002066473A JP2003260012A (ja) 2002-03-12 2002-03-12 電気掃除機
JP2002-66473 2002-03-12

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
US20060254022A1 (en) * 2005-05-16 2006-11-16 Samsung Gwangju Electronics Co., Ltd. Motor assembly and vacuum cleaner having the same
US11284768B2 (en) * 2015-04-13 2022-03-29 Lg Electronics Inc. Vacuum cleaner
WO2023182924A1 (en) * 2022-03-21 2023-09-28 Lionsbot International Pte. Ltd. Noise suppressed vacuum motor assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6692327B2 (ja) * 2017-08-28 2020-05-13 日立グローバルライフソリューションズ株式会社 電気掃除機
CN107981777A (zh) * 2017-11-29 2018-05-04 苏州市海朋电子商务有限公司 一种用于减小噪音的吸尘器风道结构
CN107928546A (zh) * 2017-11-29 2018-04-20 苏州市海朋电子商务有限公司 一种降噪型吸尘器排风机构

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CN1309336C (zh) 2007-04-11
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JP2003260012A (ja) 2003-09-16
CN1443508A (zh) 2003-09-24

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