WO2009049355A1 - Module de base de mélangeur - Google Patents

Module de base de mélangeur Download PDF

Info

Publication number
WO2009049355A1
WO2009049355A1 PCT/AU2008/001511 AU2008001511W WO2009049355A1 WO 2009049355 A1 WO2009049355 A1 WO 2009049355A1 AU 2008001511 W AU2008001511 W AU 2008001511W WO 2009049355 A1 WO2009049355 A1 WO 2009049355A1
Authority
WO
WIPO (PCT)
Prior art keywords
base module
motor
shroud
cooling
drive motor
Prior art date
Application number
PCT/AU2008/001511
Other languages
English (en)
Inventor
Ian Geoffrey Wilson
Original Assignee
Ian Geoffrey Wilson
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 AU2007905631A external-priority patent/AU2007905631A0/en
Application filed by Ian Geoffrey Wilson filed Critical Ian Geoffrey Wilson
Publication of WO2009049355A1 publication Critical patent/WO2009049355A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
    • A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
    • A47J43/07—Parts or details, e.g. mixing tools, whipping tools
    • A47J43/08—Driving mechanisms
    • A47J43/085—Driving mechanisms for machines with tools driven from the lower side
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/28—Cooling of commutators, slip-rings or brushes e.g. by ventilating

Definitions

  • the present invention relates to motorized food blenders and, more particularly, to the arrangement of the base module and cooling of the drive motor for such blenders.
  • a food blender especially a food blender for domestic use, is its rated power output and noise level.
  • Rated power for a given size is significantly influenced by the efficiency of cooling which can be provided to the motor.
  • Significant factors influencing noise level include the rigidity and mass of the motor mounting and that emitted by the cooling fan.
  • a problem in the design of blender base module motor assemblies is the need to balance these factors to achieve an acceptable noise level vis a vis power output.
  • Another undesirable aspect of food blender design is that the need to accommodate a vertically oriented, direct driving motor, its commutator brushes assembly and the cooling fan, can make the base module unduly high.
  • a food blender base module adapted for supporting a blender jug and blade assembly; said base module containing a drive motor assembly, circuitry and controls; said base module characterised in that said drive motor is at least partly enclosed in a cooling shroud, wherein at least a lower portion of said shroud has a maximum diameter smaller than a length defined between outer ends of opposing brushes of said drive motor
  • said drive motor assembly is arranged in said base module with the motor axis vertical; said opposing brushes arranged at an upper output shaft end of said motor; an exhaust fan arranged at an opposite lower end of said motor assembly.
  • said exhaust fan is located at a lower end of said cooling shroud.
  • said exhaust fan is a radial fan; an upper flange of said radial fan enclosed by a cylindrical lower portion of said cooling shroud.
  • said cooling shroud extends from said radial fan upwards; said cooling shroud extending at least to an underside of said opposing brushes.
  • internal surfaces of at least a lower portion of said cooling shroud are substantially cylindrical.
  • said motor assembly includes a single cast aluminium motor bracket; said motor bracket at said output shaft end supporting housings for said opposing brushes.
  • upper portions of said motor bracket provide at least partial closure of an upper opening of said cooling shroud; said bracket restricting air flow between opposing coils of said motor; said upper portions arranged to direct cooling air over said coils and between the rotor and stator of said motor.
  • said aluminium motor bracket at said output shaft end includes a pair of bridging elements supporting a central output shaft bearing housing; space between said pair of bridging elements allowing flows of cooling air over said housings of opposing brushes.
  • said housings of said opposing brushes are of brass; said housings in contact with said aluminium motor bracket .
  • said motor bracket at said output shaft end is arranged to allow "line of sight” cooling air flow from upper portions of said bracket to said exhaust fan; said cooling air passing between said stator and said rotor of said motor.
  • said base module is provided with a cooling air intake vent in an outer casing of said base module; said air intake vent located at a lower side portion of said casing.
  • said shroud is provided with a cooling air guide channel along a side of said shroud; said channel guiding air drawn in through said air intake vent to a level above said upper portions of said motor bracket and said upper opening of said cooling shroud.
  • said base module is provided with a cooling air outlet vent located around the periphery of said radial fan; said fan drawing cooling air through said inlet vent to enter said upper opening of said cooling shroud; said cooling air drawn substantially over said coils and through central portions of said drive motor to exhaust through said outlet vent.
  • the height of said base module from a supporting surface to a surface supporting said blender jug does not exceed 180mm.
  • the emitted noise level of said base module when unloaded does not exceed 85dB at a distance of 0.5m from said base module.
  • a food blender base module drive motor arrangement wherein said drive motor is provided with commutator and opposing brushes at an upper output end of a vertically oriented motor shaft of said motor; said base module provided with an exhaust fan at an opposite end of said motor shaft, and wherein the diameter of a lowermost cylindrical portion of a cooling shroud of said motor is a close fit about the periphery said exhaust fan.
  • said diameter of said lowermost cylindrical portions of said cooling air shroud is substantially smaller than a length defined between outer ends of said opposing brushes at said upper output end.
  • a cooling air guide channel provides a cooling air path from an inlet vent at a side of said base module; said guide channel directing said cooling air between an inside surface of a casing of said module and said guide channel to an upper opening of said cooling air shroud.
  • cooling air entering said upper opening of said cooling air shroud is biased to flow over hotter portions of said drive motor; said hotter portions including coils and central portions of said drive motor.
  • said exhaust fan is a radial fan; said radial fan including an upper disc with central opening, and a lower disc; an array of blades linking said upper disc and said lower disc.
  • a method of assembling a base module of a food blender including a main cover portion, a motor assembly, a cooling air shroud and a base cover portion; said method including the steps of:
  • said motor assembly includes commutator and brushes arranged at an upper end of the motor shaft of a drive motor of said motor assembly.
  • said cooling shroud includes a lowermost cylindrical portion; said cylindrical portion forming a close fit around the periphery of a radial cooling fan mounted to a lowermost end of said motor shaft.
  • Figure 1 is an exploded perspective view of the major components of blender base module according to a preferred embodiment of the invention
  • Figure 2 is an assembled partly sectioned side view of the blender base module of Figure 1 when viewed in a first direction
  • Figure 3 is an assembled partly sectioned side view of the blender base module of Figure 1 when viewed in a second direction normal to the direction of Figure 2,
  • Figure 4 is an exploded perspective view of the base module components of Figure 1 viewed from below,
  • Figure 5 is a plan view of the motor and shroud assembly viewed from the output shaft end.
  • a base module 10 for a food blender includes an outer casing 11 made up of a main cover portion 12 and a base cover portion 14, a drive motor assembly 16 and an internal cooling air shroud 18.
  • the drive motor is oriented within the base module with the motor shaft vertical.
  • Motor assembly 16 includes upper and lower cast aluminium motor brackets 20 and 22 respectively, electric motor components 24 and a radial exhaust fan 26 located at the base of the motor assembly. Attached to upper motor bracket 20 are housings 28 and 29 for a pair of opposing brushes 30 and 31 acting on a commutator 32. Commutator 32 and brushes 30 are located at the output shaft end 34 of the motor shaft 33 of motor assembly 16. A splined blade shaft connector 36 is affixed at the outer end 38 of motor shaft 33.
  • the greater portion of motor assembly 16 is located within the cooling shroud 18 (as best seen in Figure 2) such that the upper surfaces 40 of the side elements 42 of upper motor bracket 20 are approximately flush with the rim 44 of the upper opening 46 of the shroud 18.
  • At least the lower portions 48 of shroud 18 are approximately cylindrical, closely shrouding the lamination stack 50 and coils 52 of the motor.
  • the lowermost part of cylindrical portions 48 of the shroud 18 encloses the upper disc 54 of the radial exhaust fan 26.
  • this lowermost cylindrical portion of the cooling shroud is of a diameter to closely confine the periphery of the radial exhaust fan disc 54 so that the fan acts with maximum efficiency to draw cooling air through the shroud.
  • Radial exhaust fan 26 comprises disc 54 with central opening 58, and lower disc 61.
  • An array of radial blades 63 link the upper and lower discs, with the lower disc 61 being fixed to the lowermost end of motor shaft 33.
  • the side elements 42 of the upper motor bracket 20 provides a partial closure of the upper opening 46 of the shroud 18.
  • the configuration of the upper bracket 20 is such that air flow into the shroud 18 is restricted over the regions between the coils 52 of the motor but is biased to flow over the coils and adjacent portions of the lamination stack 50.
  • the drive motor of the invention is structured to maximise the spaces between rotor and stator are so as to allow "line of sight" cooling air flow through the centre of the motor from the upper portion down to the centre opening 58 of the radial fan upper disc 54 at its base.
  • the structure of the lower cast aluminium bracket 22 with its pair of narrow bridging structures supporting the fan end shaft bearing housing 78 further assists in this free flow of cooling air.
  • This minimal obstruction of cooling air flow over and through the hottest parts of the motor is also aided by the similar narrow pair of bridging elements 60 supporting the central motor shaft upper bearing housing 62.
  • the space between the pair of bridging elements 60 also allows unimpeded cooling air flows over the housings 28 and 29 of the opposing brushes 30 and 31. Cooling of the brushes 30, 31 is further aided by the housings 28 and 29 being of brass and in contact with the relatively massive side elements 42 of the upper cast aluminium motor bracket 20 to which they are attached, and which act in effect as heat sinks.
  • Cooling air shroud 18 is provided with a cooling air guide channel 64 at one side of the shroud 18.
  • guide channel 64 forms an air flow path between the inside of the casing and the shroud. Cooling air drawn in through inlet vent 66 is guided up to the top of the motor assembly and the upper opening 68 of the shroud 18.
  • the radial exhaust fan 26 is nested in outlet vent structure 70 in base cover portion 14 of the casing. Assembly of the components of the base module proceeds with firstly the motor assembly 16 being attached to the projecting mounting posts 80 inside the upper portion of the main cover portion 12 by the four resilient vibration mountings 84.
  • the cooling shroud 18 is then fitted over the motor assembly and also attached to similar mounting posts 86 and wiring (not shown) connected.
  • the shroud also serves to lock down the printed circuit board of the motor control system (not shown) .
  • the base cover portion 14 is attached to the posts 88 of the cooling shroud 18, completing the assembly of the base module.
  • the arrangement provides for a considerably lower overall profile of the base module, providing a more compact base module than would be possible in a conventional motor layout with a similar power rating.
  • the particular arrangement of the base module of the invention is capable of a power output of 1000 watts, yet has an overall height from support surface to the top of the main cover portion 12 of less than 180mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Food-Manufacturing Devices (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

L'invention concerne un module de base de mélangeur d'aliments ; ledit module étant conçu pour supporter un récipient de mélangeur et un ensemble de lames ; ledit module de base comportant un ensemble moteur d'entraînement, des circuits et des mécanismes de commande ; ledit module de base étant caractérisé en ce que le moteur de commande est au moins partiellement renfermé dans une enceinte de refroidissement, au moins une partie inférieure de ladite enceinte présentant un diamètre maximale plus petit qu'une longueur définie entre les extrémités extérieures de balais opposés dudit moteur d'entraînement. L'invention concerne également un procédé permettant de maximiser l'écoulement d'air de refroidissement autour et au travers d'un ensemble moteur dans un module de base de mélangeur d'aliments ; ledit procédé consistant à : (a) disposer les balais opposés d'un moteur d'entraînement de lame dudit assemblage à une extrémité de l'arbre de sortie dudit moteur d'entraînement, (b) placer un ventilateur au niveau d'une extrémité inférieure opposée dudit moteur d'entraînement, (c) prévoir une enceinte de refroidissement autour dudit moteur d'entraînement de lame, un diamètre intérieur maximale de ladite enceinte étant plus petit qu'une longueur définie par les extrémités extérieures desdits balais opposés.
PCT/AU2008/001511 2007-10-15 2008-10-15 Module de base de mélangeur WO2009049355A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2007905631 2007-10-15
AU2007905631A AU2007905631A0 (en) 2007-10-15 Blender Base Module

Publications (1)

Publication Number Publication Date
WO2009049355A1 true WO2009049355A1 (fr) 2009-04-23

Family

ID=40566913

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2008/001511 WO2009049355A1 (fr) 2007-10-15 2008-10-15 Module de base de mélangeur

Country Status (1)

Country Link
WO (1) WO2009049355A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012158685A1 (fr) 2011-05-16 2012-11-22 Vita-Mix Corporation Base de mélangeur
CN101940970B (zh) * 2009-07-03 2013-04-10 苏州宝时得电动工具有限公司 园艺粉碎机
EP2679124A1 (fr) * 2012-06-29 2014-01-01 Seb S.A. Gaine de ventilation d'un appareil électroménager
WO2017121068A1 (fr) * 2016-01-15 2017-07-20 广东新宝电器股份有限公司 Appareil de ventilation et de circulation d'air pour machine de transformation d'aliment
WO2018034979A1 (fr) 2016-08-18 2018-02-22 Vita-Mix Management Corporation Système d'écoulement d'air réduisant le bruit pour un système mélangeur
WO2018170283A1 (fr) * 2017-03-15 2018-09-20 Spectrum Brands, Inc. Boîtier de moteur d'appareil silencieux
EP3303847B1 (fr) * 2015-05-29 2020-01-01 Ametek, Inc. Appareil à bruit réduit
WO2020210575A1 (fr) * 2019-04-10 2020-10-15 Sharkninja Operating Llc Système de traitement d'aliments
USD913033S1 (en) 2019-04-01 2021-03-16 Sharkninja Operating Llc Blender
US11064839B2 (en) * 2018-04-20 2021-07-20 Hamilton Beach Brands, Inc. Blender with baffle for reducing noise
CN113784646A (zh) * 2019-05-08 2021-12-10 Lg电子株式会社 料理机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3738616A (en) * 1969-10-30 1973-06-12 Sunbeam Corp Motor driven appliance
US3901484A (en) * 1973-12-26 1975-08-26 Oster Corp Electric food blender
US5273358A (en) * 1992-04-13 1993-12-28 Vita-Mix Corporation Quiet and efficient motor cooling fan assembly for a blender
US6499873B1 (en) * 2000-11-24 2002-12-31 Quality & Strength Inc. Fruit/vegetable blender

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3738616A (en) * 1969-10-30 1973-06-12 Sunbeam Corp Motor driven appliance
US3901484A (en) * 1973-12-26 1975-08-26 Oster Corp Electric food blender
US5273358A (en) * 1992-04-13 1993-12-28 Vita-Mix Corporation Quiet and efficient motor cooling fan assembly for a blender
US6499873B1 (en) * 2000-11-24 2002-12-31 Quality & Strength Inc. Fruit/vegetable blender

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101940970B (zh) * 2009-07-03 2013-04-10 苏州宝时得电动工具有限公司 园艺粉碎机
JP2015171558A (ja) * 2011-05-16 2015-10-01 バイタ−ミックス コーポレーションＶｉｔａ−Ｍｉｘ Ｃｏｒｐｏｒａｔｉｏｎ ブレンダーベース
EP2709750A4 (fr) * 2011-05-16 2015-10-07 Vita Mix Corp Base de mélangeur
US9844302B2 (en) 2011-05-16 2017-12-19 Vita-Mix Management Corporation Blender base
EP3620088A1 (fr) * 2011-05-16 2020-03-11 Vita-Mix Management Corporation Base de mélangeur
WO2012158685A1 (fr) 2011-05-16 2012-11-22 Vita-Mix Corporation Base de mélangeur
EP2679124A1 (fr) * 2012-06-29 2014-01-01 Seb S.A. Gaine de ventilation d'un appareil électroménager
FR2992539A1 (fr) * 2012-06-29 2014-01-03 Seb Sa Gaine de ventilation d'un appareil electromenager
EP3303847B1 (fr) * 2015-05-29 2020-01-01 Ametek, Inc. Appareil à bruit réduit
WO2017121068A1 (fr) * 2016-01-15 2017-07-20 广东新宝电器股份有限公司 Appareil de ventilation et de circulation d'air pour machine de transformation d'aliment
US11337557B2 (en) 2016-01-15 2022-05-24 Guangdong Xinbao Electrical Appliances Holdings Co., Ltd. Air circulation and ventilation apparatus for food processing machine
CN109803752A (zh) * 2016-08-18 2019-05-24 维他拌管理有限公司 用于搅拌器系统的降噪气流系统
EP3500360A4 (fr) * 2016-08-18 2020-04-08 Vita-Mix Management Corporation Système d'écoulement d'air réduisant le bruit pour un système mélangeur
US11219334B2 (en) 2016-08-18 2022-01-11 Vita-Mix Management Corporation Sound reducing airflow system for a blender system
WO2018034979A1 (fr) 2016-08-18 2018-02-22 Vita-Mix Management Corporation Système d'écoulement d'air réduisant le bruit pour un système mélangeur
US11877698B2 (en) 2016-08-18 2024-01-23 Vita-Mix Management Corporation Sound reducing airflow system for a blender system
US10575683B2 (en) 2017-03-15 2020-03-03 Spectrum Brands, Inc. Quiet appliance motor housing
WO2018170283A1 (fr) * 2017-03-15 2018-09-20 Spectrum Brands, Inc. Boîtier de moteur d'appareil silencieux
US11064839B2 (en) * 2018-04-20 2021-07-20 Hamilton Beach Brands, Inc. Blender with baffle for reducing noise
USD913033S1 (en) 2019-04-01 2021-03-16 Sharkninja Operating Llc Blender
WO2020210575A1 (fr) * 2019-04-10 2020-10-15 Sharkninja Operating Llc Système de traitement d'aliments
CN113784646A (zh) * 2019-05-08 2021-12-10 Lg电子株式会社 料理机
CN113784646B (zh) * 2019-05-08 2024-04-09 Lg电子株式会社 料理机

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